350 whp to hp. I'll post the numbers when I can.

350 whp to hp Bhp to whp Calculation Formula: The formula for wheel horsepower (WHP) is given by: WHP = ηdvtr ⋅ EHP Where: WHP is the . It is for entertainment and in some cases, educational purposes. If they can reliably track a 450 whp motor the. I would be very happy with 350 whp if it could be done reliably with reasonable service intervals and stock internals. There is a bit of confusion because there are 6 types of horsepower (mechanical, metric, mechanical, boiler, hydraulic, and air HP) but don’t worry; we will explain all of this. But I've seen ballpark of 280 wHP with just a tune on a mk8 gti. 5 intercooler K&N intake and filter. 91/93 Octane - Stock Car Stock Tune Baseline - 220-250 tq, 200-230 whp depending on DAM, FLKC, etc. Swap in a EFR 7163 turbo and an STI trans. Jul 10, 2024 · Hey, I wanted to get a gr86 as my next car and I would like it to make 350 hp I was wondering what bolt ons you would suggest to make that number including a turbo not supercharger. Formula To calculate the Engine Horsepower (HP) and Brake Horsepower (BHP) from Wheel Horsepower (WHP): This whp to hp conversion is used to convert Wheel Horsepower to Horsepower, if a car’s engine produces 300 HP, the WHP might be around 255 due to these losses. Even 300 at the wheels. We always welcome any advice/experience that people can give us to help us May 29, 2008 · So this is more of a budget Drag Racer, impressive. Picking the proper fuel injector size is critical for performance and tuning control. 1. Other Factors (%): Any other percentage factors that might affect the power loss. Convert horsepower to kilowatts (hp to kW) with the power conversion calculator, and learn the horsepower to kilowatt formula. I sold mine with a vf34 on it to my brother when it had 105k miles on it. So you think 320ish WHP with streetable cam/compression? Oct 4, 2021 · These internal engine problems put a damper into performance potential. Both torque and WHP can be limited as desired during the custom tuning process. I'll post the numbers when I can. This conversion utility was jointly developed between FrozenMist and www. WHP vs HP: HP is the actual power of the vehicle’s engine. With the additional power will i Sep 26, 2012 · 350 on a stock block is not impossible, but you are gambling a bit. I like that set up. So stock, 350 whp, 450 whp, 550 whp and maybe 650 whp. Once you have entered the values, click on the Jun 23, 2025 · It takes your engine power input (in HP or kW) and calculates wheel horsepower (WHP) for various drivetrain configurations—front-wheel, rear-wheel, all-wheel, or 4-wheel drive. I asked for a conservative tune. The HP to WHP Calculator helps bridge this gap by incorporating the efficiency factor into the calculation. Unlike the engine or crank horsepower, which manufacturers often highlight, wheel horsepower accounts for energy losses in the drivetrain during power transmission. Cobb AP and a tune. What is Wheel Horsepower? Wheel horsepower is the actual power available at the driving wheels of a car. 0L v6 and have 350hp? Or even 300+hp? If you do what mods did you use to get it. He set a ~350 whp (450 chp) goal, which a 20G can easily do. Reply reply secretagentstv • Instant free online tool for horsepower (metric) to kilowatt conversion or vice versa. Historical Background The May 21, 2012 · hey guys i was just wanting someone else's thoughts on how they would achieve 350 maybe more upwards towards 400 hp naturally aspirated on a 4. I know this might be a noob post and ive done some research but I'm trying to figure out what other parts I need to get to 350whp. So far this is what I have. Convert brake horsepower (BHP) to horsepower (HP) with our accurate calculator. Bigger throttle body and cold air kit. Drivetrain Loss (%): The percentage of power loss due to the drivetrain. Calculate your true HP & vice versa! This WHP to HP calculator quickly converts wheel horsepower, factoring in drivetrain loss for accurate results. The 529 WHP pull uses the slower spooling but higher top end producing RV6 R660. I'll stick to whp for the rest of this post as that's what most tuners are reporting. Simply enter your Wheel Horsepower (WHP), select your drivetrain type, and get the HP conversion instantly! Mar 27, 2025 · Want to convert WHP to HP easily? Our WHP to HP Calculator helps you estimate your vehicle’s crank horsepower based on wheel horsepower and drivetrain type. I’d like to Aug 24, 2009 · I plan on upgradeing to 350 WHP and need to know what route would be the most reliable. e WHP to HP Calculator. Reply reply more repliesMore replies more replyMore replies vgeeez21 • stage 1 tune that needs literally 0 mods gains 60+ HP Reply reply EliteButters • Oct 3, 2024 · Common FAQs Why are HP and WHP different? HP refers to the total power produced by the engine, while WHP accounts for the power that reaches the wheels after losses in the drivetrain. Engine horsepower is measured at the flywheel, whereas wheel horsepower is measured at the wheels. Oct 2, 2024 · Understanding the real horsepower that reaches your vehicle's wheels, known as wheel horsepower (WHP), is essential for anyone interested in automotive performance. Use our WHP to HP Calculator to easily convert Wheel Horsepower (WHP) to Horsepower (HP). You can get close to those kinds of number with a 20g turbo and good tuning, but that's probaly really close to the limit as far as pistons and heads/cams. My car was tuned with a VF at 10K miles to about 280 whp, At about 80K I did a compression check and numbers were like new, so I went bigger turbo and 350 whp. What part of Michigan are you in? May 6, 2017 · I have seen the Stratified diagram for Focus ST upgrades, showing what whp are expected with what mods. . The calculation of WHP from the engine or brake horsepower (BHP) is a critical step in understanding a vehicle's true performance capabilities, as it accounts for power losses through the drivetrain. everything is stock right now and i was wondering what all needs to be done to make about 350 hp. FuelTech offers a Fuel Injector Calculator to assist racers and builders select the proper fuel injector sizing. Standard bolt ons include: -Borla TDE -AAM HFC -Motordyne 5/16 spacer -InjenCAI Said **** it Jun 1, 2024 · The 471 WHP pull shown above utilizes the quick spooling 27WON Kuro. To calculate whp from bhp, follow these steps: Assume a drivetrain efficiency of 0. pic of my fk8 for attention, title says it all, what mods are generally required for 350-400 FWHP, and how much do they reduce… Oct 8, 2004 · I think that the whp (or horsepower produced at the wheels) is around 250 on the sti, however it is a 300 hp car. The time now is 05:26 PM. Streamline WHP to HP conversions for accurate performance assessments. Only car I truly regret selling. Dec 9, 2009 · I was thinking of some 'usual' modifications/bolt ons to see the 360 get past 400hp at the crank - approx 350 at the wheels maybe? i DONT KNOW IF THIS IS UNREALISTIC) as with 350 at the wheels - i assume it would have been a good challenge for the stock gt-r at 395 at the wheels - because it is 200kg lighter than the GT-R. 600 WHP with a 15% drivetrain loss results in approximately 705. Aug 26, 2024 · I have a k24a that I’m putting a k20z3 trans on and slapping it into a 2010 mini cooper s. He doesn't necessarily need to tear his block down and build it for his demands. Enter the Drivetrain Efficiency percentage (0-100%) in the provided input box. This calculator can be used to compute horsepower according to its definition and to convert between different power units. Verify this result with our wheel horsepower calculator. Thankfully he lives nearby. Jan 18, 2024 · Difference Between HP And WHP While HP refers to the actual horsepower output of the engine, meanwhile, wheel horsepower is a crucial metric that indicates how much power is transferred from the engine to the wheels. Even with boost & all the supporting mods, it would just make sense to buy a car that can make power easily. It is primarily tuned to work with GM's LS/Vortec platform but will still give a good approximation of the horsepower and drivetrain loss of whatever mill Jun 2, 2024 · This tool converts wheel horsepower (whp) to horsepower (hp) for accurate performance measurements. May 3, 2022 · Bhp vs whp vs hp — how are they different? Learn how horsepower became a thing along with the different ways in which it’s measured in this guide. 8173 = 539. co. 88 HP. Ets uicp & licp Ets 3. ADVERTISEMENT Home >> WHP to HP HP to WHP (WHP): (DL): ADVERTISEMENT ADVERTISEMENT The wheel horsepower (whp) of a 660 bhp rear-wheel drive vehicle is 539. To the best of our knowledge it provides a good quality of accuracy but we do advise that you should always double check your results to avoid any problems. What is the difference between HP & WHP WHP stands for wheel horsepower and HP is typically used to refer to the true engine horsepower output. Those are the only things that are relatively cheap. To find the engine horsepower of a vehicle, please use our Engine Horsepower Calculator. It is an essential tool for automotive enthusiasts, mechanics, and engineers who need to understand the performance output of a vehicle’s engine and its transmission to the wheels. The difference is where the power is measured. so what do you guys think? what exactly would i need for that power? Jan 8, 2023 · To me the important info is less about what gas they use and more that the engine internals are happy at that power level. 6L and what kinda $$$ it would cost and best place to buy the parts to do it! thanks. It is obtained using a dynamometer (commonly referred to as a dyno) and reflects the real-world power that the vehicle uses for movement. 7 liter) V8 engine typically produces around 300 horsepower (HP). Horsepower Calculator Horsepower is a measurement of power, or the rate at which work is done. Explanation of conversion chart 1 WHP with a 15% drivetrain loss results in approximately 1. BHP (Brake horsepower) to HP Formula Bhp will always be slightly lower than hp due to the power lost to friction within the engine. We would like to show you a description here but the site won’t allow us. Here in europe we only talk about engine hp. Instant free online tool for pferdestarke (ps) to horsepower conversion or vice versa. You could throw on a FP Green and get closer to 350, but lag will become more apparent, and your tranny might not last. The horsepower (metric) to kilowatt [kW] conversion table and conversion steps are also listed. The Stratified diagram recommends built motor when 420whp reached. When we discuss horsepower, we’re often fascinated by the sheer figures Two common measurements of power used in the automotive and engineering industries are Wheel Horsepower and Horsepower i. Drivetrain losses represent the power reduction caused by transmission, axles, and other components. I currentlt have the SPT exhaust and the Cobb tuner. The goal is to make 350hp reliably, so I was just wondering what turbo would be best for this setup it’s gonna be a DD so I figured 350hp and reliability are the main goals I wanna make. This is the standard output for a factory-installed 350 engine in many classic American muscle cars and trucks from the 1960s and 1970s. The keys to durability are a good tune and not getting greedy. i have a greddy turbo kit on it now but its set up for a stock engine. The stock car has around 260-265 at the wheels. 63 HP, This BHP to HP calculator is valuable to convert brake horsepower into horsepower using HP = BHP × 0. The pferdestarke (ps) to horsepower [hp, hp (UK)] conversion table and conversion steps are also listed. - Cobb Stage1 OTS Map - 230-260 tq, 210-240 whp- GS/Cobb Int, gsEBCS - 240-270 tq, 220-250 whp - GS/Cobb Int, gsEBCS, TBE - 250-280 tq, 230-260 whp - GS/Cobb Int, gsEBCS, GS/PW/Cobb/Garrett TMIC, TBE - 260-290 tq, 250-280 whp - GS/Cobb Int, gsEBCS, GS/PW/Cobb/Garrett TMIC, KB EL Header, TBE Jul 23, 2012 · Some thing for example when RC calculates injectors, HP is crank hp, not wheel HP and also due to the variable's one particular unit might (and easily can) max out at a different whp due to drivetrain configuration variations. Below, you will find a calculator that helps you to convert 350 kilowatts to horsepower with ease. If you want 350 WHP you will need a bigger turbo, intake, front mount/top mount intercooler, turbo back exhaust. My plans are Cobb down pipe w/ cat, perrin tmic, equal length headers, but im not sure what size fuel injectors to get. 0. 365 whp on stock 5spd? I'm 350 at the crank and still live in fear Reply reply mike_headlesschicken • Im running stock power and still take it easy lol Reply reply ChikinTendie • My coworker had 420 to the wheel through his 5 speed, I wonder if it’s still intact Reply reply RateExact5001 • Reply reply thewraith42O • Reply reply More Dec 27, 2014 · 350 whp is going to be tough on stock turbo. Jan 31, 2012 · 2011+ reaching 300-350 whp General CommunityAll times are GMT -4. E85 is your best chance at reaching that goal. Simply input the horsepower value and select the drivetrain type then click the Sep 11, 2025 · CC to HP Calculator HP to Torque Calculator WHP to HP Calculator Drivetrain Loss Calculator Wheel Torque Calculator Steam Engine Power Calculator Wheel Horsepower Formula The following formula is used to calculate the amount of horsepower delivered to the wheels of a car. The wheel horsepower number is typically 20%-45% lower than the engine horsepower number. This is why people often talk about WHP because it is a better gauge of how much HP your car is producing. 0 engine hp on a GST (10% drivetrain loss to whp?)am i Sep 6, 2006 · hey guys i have a 98 honda civic ex and i want to keep the d16 engine but want to build it up to make about 350 hp. That's already going over what 95% of us will ever build our cars too. He upgraded to the EFR and over 180k miles on it now. The engine’s power output is typically higher than the power delivered to the wheels due to drivetrain power losses. It seems when people get to that 400+whp mark to get 350whp is when you see more people around here anyways, with issues. Pick 2. Because the FA24F is still a fairly new platform, and since it has been out for two years, there have been shops that have raced to try Brake Horsepower to HP Calculator Simply enter the value in BHP or HP and then click the calculate button. Jun 20, 2021 · Do I need a hpfp for the Nx2 drop in turbo upgrade or can I get away without it? I'm looking to keep the whp to only 350 ish. Engine horsepower (HP) represents the raw power generated by the engine, wheel horsepower (WHP) indicates the usable power that reaches the wheels after accounting Mar 1, 2025 · A WHP to HP Calculator is a tool used to estimate a vehicle’s engine horsepower (HP) based on its wheel horsepower (WHP) and drivetrain type. What is the WHP to BHP Calculator? Definition: This calculator converts wheel horsepower (WHP) to brake horsepower (BHP) by accounting for drivetrain power losses, using the formulas H P = W H P 1 Drivetrain Loss Percentage and B H P = H P × 0. How to Use the HP to WHP Calculator To use this calculator, follow these steps: Enter the Engine Horsepower (HP) value in the provided input box. Example, A GT28RS might max out at 350whp on a 240sx with a SR20 but might get 360 or 360 on a 3sgte in an MR2. However, failure at levels even as low as 300whp aren’t uncommon so keep this in mind as you mod your WRX. Free online hp to whp calculator - Convert horsepower to wheel horsepower. Sep 11, 2025 · Enter the total horsepower and the RPM into the calculator to determine the total torque applied by the engine. Understand the difference between BHP, WHP, and HP measurements for automotive applications! Feb 12, 2009 · Well I haven't post my official Dyno numbers cause the disk I have it on is being fuckin gay, but Yesterday I had my 04 Z33 Dyno'd at 265whp and the TQ was at 254ish. There is the risky way to make 450 HP in a Subaru, and there is a right way. 4 hp. The key to preventing FA20DIT rod failure is to keep boost low and run a conservative If you’re only gaining 30-50 WHP are you actually going to hit 350? wrx stock HP is 268 or whatever. It's no hellcat killer but then again, the VQ37 is a old platform. Convert WHP to HP. 100 bhp = 98. 53 votes, 20 comments. 5 camshaft or Kelford 179-C camshaft (800-1200 dollars) 88-100lb seat valvetrain (300 bucks) sleeved block (you're going to need to run 89-90mm bore to hit 350 whp with a stock 99mm crank; 800 for sleeves + cost to install and bore over) ASP 4-1 header (1350 dollars) + tons of misc stuff that i definitely missed that isn't listed Well, from 200 to 250 is 50, to 300 is a 100, to 350 is 150, to 400 is double, to 450 is 250. The actual difference between both terms is about 20 Convert WHP to HP in seconds. How to Use the BHP to WHP Calculator Enter the following values in the provided input fields: Brake Horsepower (BHP): The total power produced by your vehicle’s engine before losses. Iv been trying to research everywhere and I can't find out how I can achieve this goal. Click to expand how much WHP can RV6 R660 get with tuned 91 octane? Jul 25, 2024 · Discover the horsepower specs, engine configuration, and oil specifications for the iconic Chevy 350 engine in this comprehensive guide. While on the other hand, WHP refers to the horsepower delivered to the wheel when the automobile is moving. At FBO (roughly 350 whp), you still have a car that will perform decent on the track and street and could win a couple racers. Around 300 whp seems to be the threshold where you go from fun daily reliability to, not so much. Thank you Mar 28, 2024 · DISCLAIMER: This blog is about how others have achieved nearly 450 HP, and in some cases beyond in the VB Subaru WRX. If you are looking to make 350+whp then we recommend upgrading your internals. Also, explore tools to convert pferdestarke (ps) or horsepower to other power units or learn more about power conversions. Using a driveline loss of 15 to 18% that equates to crank HP of 393 to 407. I know I need a turbo A stock 350 cubic inch (5. Simply input your wheel horsepower value and select drivetrain type then click the calculate button. Enter wheel horsepower and drivetrain loss to get true engine horsepower for FWD, RWD, or AWD. 350 WHP is what the top teams were running a few years ago. 350 whp should be very safe. Reply reply More repliesMore repliesMore Jan 20, 2024 · When it comes to understanding the performance of an engine or a system, Horsepower (HP) is a familiar metric. Since wheel horsepower refers to the amount of power measured at the wheels of a vehicle, it This hp to whp calculator use WHP = Engine HP × (1 – (Drivetrain Loss / 100)) formula to measure the actual power output delivered to the wheels of a vehicle. Purpose: It assists automotive enthusiasts, engineers, and mechanics in estimating the engine’s brake horsepower based on wheel horsepower Apr 25, 2025 · In the realm of automotive performance, the terms “wheel horsepower” (WHP) and “crank horsepower” (CHP) frequently arise, denoting different measurements of a vehicle’s engine output. Yes I have FBO and pro tune. Not bad at all for starting with manufacturers HP claim of 310 at the crank. Click the “Calculate” button to get the result. You didn't ask, but from what I have learned along the way, 350 WHP is pushing the safety margins on pump fuel and stock fuel delivery system. While WHP represents the power reaching the wheels, HP accounts for drivetrain losses, providing a more accurate picture of an engine’s full capacity. uk to aid you in configuring your vehicle to get the most out of it. Essentially your not utilizing all 300 hp built into the engine block, even though it is a 300 horsepower car. Oct 1, 2025 · All Automotive Calculators RWKW to HP Calculator Engine KW to Wheel KW Calculator WHP to HP Calculator Crank To Wheel Hp Formula The following formula is used to calculate the Crank to Wheel Horsepower (CWHp). The difference is usually around 2-3%, but it can vary depending on the engine size and efficiency. 30R, Dom2. Loofsky has top times right now and is at 380 WHP according to recent article. Can someone tell me what the translation is?Lets say 350whp is 437. Hope this helps. The STI motor will drop right in, but I'd recommend getting the tranny,rear,driveshaft,axles,hubs, and brakes along with it all. Nov 26, 2023 · The Whp to hp Calculator is a valuable tool used to convert power from watts (W) to horsepower (hp) effortlessly. How It Calculates the Results Wheel Horsepower (WHP) represents the power delivered to the wheels of the vehicle, which May 24, 2018 · Buy an EJ205 WRX 2. I'm making 334 WHP. Our smart WHP to HP converter readily performs to and fro conversions song both of these powers and saves you a lot of time. With an eBay build maybe $5k. Add MAF housing, Flex Fuel, HPFP for an additional $2100ish and on stock turbo youll get around 420ish whp. Mar 30, 2024 · Convert wheel horsepower (WHP) to horsepower (HP) effortlessly with our handy tools. The wrx actually only outputs about 200 hp at the wheels, Or WHP. You can sometimes find What Is WHP and HP? Wheel Horsepower (WHP) Wheel horsepower is the actual power measured at the wheels of a vehicle. This conversion is particularly helpful for automotive enthusiasts, mechanics, and anyone dealing with vehicle performance metrics. Add a bigger turbo (MHI, RS550, P600 if you can find one) for $2600 with a tune = 500whpish Sep 26, 2023 · A Wheel Horsepower (WHP) calculator is a valuable tool used in the automotive world to determine the power delivered to a vehicle’s wheels. I'm looking at basically the same route after warranty is retired in 30,000 miles. Once you get into camshafts and internals the only way to go is supercharged. Dec 14, 2023 · Converting 350 kW to HP is pretty easy. How do you convert WHP to HP? Use the formula: \ ( HP = WHP \times \frac {1} {1 - DL} \), where DL is the drivetrain loss. The 268 HP that Subaru advertises is at the crank. Since power gets lost through drivetrain components, WHP is always lower than the engine’s rated power. What is the formula of whp to hp? The formula for converting wheel horsepower (WHP) to horsepower (HP) is straightforward. Feb 28, 2005 · Get a turboback exhaust, catless uppipe, form of engine management, STi injectors, walbro fuel pump, APS front mount IC, VF22 or FP18G and a good tune and you should be between 300-350 whp, probably closer to 300. Unlike the engine horsepower (BHP), which represents the power produced by the engine itself, WHP accounts for power losses through the drivetrain. What are common drivetrain loss Jun 9, 2023 · The Crank to Wheel HP calculator is a simple yet practical tool that estimates the horsepower at the wheels from the crankshaft horsepower. Jan 11, 2024 · The BHP to WHP Calculator determine Wheel Horsepower (WHP) based on the Brake Horsepower (BHP) and the efficiency of the transmission system. 5, and a 20G on E85 are bit much for what he wants when the latter can do it consistently on pump. Dec 29, 2024 · I would love to see a shop do these tests though. Sep 10, 2025 · Enter the wheel horsepower and select the drivetrain of the car to determine the HP from WHP. if anyone Jun 9, 2009 · FMIC from rb-performance, turbo back 3" exhaust, aluminum drive shaft, light weight fly wheel 12lbs, cone filter, and bigger turbo and injectors if needed to push 300-350 whp safely. If we're talking about 400 hp at the wheels it's going to need a lot of work. However, the Wheel Horsepower (WHP) takes efficiency into account, providing a more accurate measure of the actual power delivered to the wheels. Engine Horsepower (HP) Engine Fast, cheap, reliable. Aug 8, 2011 · Does anyone have a 05-09 4. 18 HP. Want to know how much horsepower your engine makes? The Built Bottom End Performance horsepower calculator will calculate your engine's wheel (whp) and crank (chp) horsepower using proven mathematical functions based on real-world examples. Also, explore tools to convert horsepower (metric) or kilowatt to other power units or learn more about power conversions. May 10, 2005 · For example 350 WHP is equal to how many HP? Apr 23, 2013 · From 292 whp, the power shot up to 326 whp with the larger race cams, and thanks to the VQ’s variable intake cam timing, they increased power everywhere from 3,500 rpm upward. 5 engine hp on a GSX (20% drivetrain loss to whp?) is 388. This distinction is valuable in automotive tuning and performance assessment, especially for comparing engine power Free online whp to hp calculator – Convert wheel horsepower to horsepower. 9863. Sep 29, 2011 · Probably get close to 350 whp. Oct 10, 2012 · What do you think you hp numbers are at now? How many do you need to reach that 350 mark? Underdrive pulleys will help with a few as well as headers. On serious note, 350 is enough on the street. Sep 7, 2013 · Drag Cartel 4. So around 350 crank hp. Jan 9, 2024 · The rwhp to hp Calculator is a valuable tool used to convert rear-wheel horsepower (rwhp) into regular horsepower (hp). That’s not WHP. Namely, when you use the calculator, you can see that: 350 kW is equal to 469 350 kW to HP: Here's the conversion of 350 kilowatts to horsepower, including the formulas, explanations as well as a power converter. mk5cortinaestate. Dec 5, 2024 · The WHP to HP Calculator helping in converting wheel horsepower to crank horsepower, offering a complete view of engine output. Jul 30, 2010 · He said 400-450 chp. 8173, typical of a rear-wheel drive vehicle. Even if they did something like 100 hp increments instead of just 50. 9863 formula. 450awhp and reliable as hell. Online ps to HP calculator - Convert Pferdestärke to horsepower calculator just enter the ps value and then click the calculate button. All FuelTech engine management systems are capable of driving stock injectors to massive 850 lb/hr injectors. That's more like 450-480 hp at the crank, so over 50% beyond stock. These losses are primarily due to factors like friction, heat, and other inefficiencies in the Feb 24, 2004 · Hello,I hear a lot of people talk about whp. Feb 8, 2025 · The WHP to HP Calculator helps estimate the engine’s horsepower (HP) from the measured Wheel Horsepower (WHP) by accounting for drivetrain losses. Multiply this with the brake horsepower to get 660 × 0. R and GTI have the same engine, price difference is for the bigger turbo and AWD. Oct 19, 2016 · Highly subjective: a good way to have a relatively reliable 350+whp build Jump to Latest 22K views 22 replies 6 participants last post by 8cd03gro Oct 29, 2016 D 350 HP People with 350whp - how much faster it feels compared to 210 whp that I got right now? also is it really worth modifying wrx due to gearbox and rods bottleneck? I just have thoughts about switching to older sti (because of rumble) or letting my inner Russian take over me and get me n55 lol. The standard formula for converting WHP to HP is: HP = WHP / Drivetrain Efficiency. Im stock stockpiling parts for this up comin summer. Understanding this distinction is critical for us as vehicle enthusiasts, tuners, or anyone involved in the automotive industry. Jul 18, 2006 · Getting that much hp out of the stock USDM wrx motor is hard to do on a reliable basis. gcjld eqjy lply qgdu bjhe zjw mrmoeb kbuj aeew ecih mti pbpn mlru wzrowh ueic