whp is about 25% less than flywheel HP. Your drivetrain looses about 25% of the power that goes to it. For example, the stock power of your car is 227 hp AT THE FLYWHEEL. If you measure it at the wheels, it's about 165whp.
So, me saying "flywheel hp or whp" is saying "are you talking about 375whp or 500whp?"
The WRX doesn't mod to much over 300whp cheaply. Even at a 10k budget, much more than that you start to risk expensive mechanical failures that can quickly blow the budget.
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16G powered lagless fun
if your doing drag or autox then i can kinda see the reason for 500hp. but if you just want to romp and stomp on civics all day its a waste of money, gas and time IMO
the WRX is a pretty poor drag car. It does OK, but the drivetrain takes a huge amount of stress in comparison to FWD or RWD (the drag staple). If you like running 11s at the drag strip, the WRX is not the car to do it in unless you have a monster budget.
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16G powered lagless fun
just to lay down some prices. my 02 with a ej20 has got a good working over and i'm looking at about 8 grand.(I do all labour myself.) that covers coilovers, breaks, spec -c short block RA gears, perrin tmic vf23 and pink(565cc)injectors. it already had exhaust and at this stage i'm good for about 325 AWHP. don't underestimate the wildness of just this mild of mods. she's fast. easily outrunning anything I've raced over any distance. but I've never held the lead in first off the line. AWD just won't launch with total disregard to the drivetrain. but she's always faster in second than anything I've raced. and even ran with a new corvette down the superslab with confidance. I ended up loseing him traffic because of the better handling. so take a good look at what you what to do and how much you have to spend. but i'd say stick to around the 350AWHP mark if you like your stock drive shafts and diffs.
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its all coming together, after a year.
02 WRX
I hate to advocate this but if your looking to build a drag car maybe you should look into the RWD kits for your WRX. I 've seen a few ways to make these cars only rear wheel for drag or drift. that way the drive train will get alot cheaper.
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its all coming together, after a year.
02 WRX
Someone with a STi correct me, but dont they run like 12's or 13's 1/4 mile? I'm not really sure but i know they're close. You wouldn't need 500 ponies to get 11's
i ran a 13.3 bone stock. im sure u can spend about 15,000 wisely and u doing most of the work and you should be high 11's. the most important thing is to know that it takes a combination of parts that's not just power mods. some people think u dont need suspension to go in a straight line. u gotta do it all. in order to keep from fixing broken parts all the time.
edit: u will need a stroker kit or the 2.5L, atleast it will be easier that way and can save u money on parts from trying to nickel and dime your way into more hp.
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rollin on 17's now and they're dirty
Last edited by baller_v24 : 02-26-2008 at 08:43 PM.
Reason: forgot something else.
To reach 500whp with a EJ20 you will need a lot of work to do it safely so the car will last through a few 1/4 mile trips
Transmission
All the internals for the motor
Head work
Stand Alone EM wouldn't hurt
Drive Shaft
Axles
A large turbo set up
at least 800cc injectors depending on the fuel set up your choose
Fuel pump
There is a lot of choices you would have to make because there are many ways to make a lot of power...I would start with a motor swap to make it easier. A full build to make 500whp safely would cost around 15K give or take.
theres a link to a power package for ## wrx to get u to 12.6 or so it says its 3600$ so not bad of a price for what u are getting check it out that would be where i started if i was u and then i would work from there...
but then again its 3600 just for parts that means u do the install... so u might spend more if u pay someone to do it...
500hp in a daily can only cost you money my friend. If not in broken parts it will be speeding tickets and maybe worse. Lets face it the more we mod the heavier our foots get. A couple tix and you will need $10k just cover your insurance bill for the next couple years. Not to bring you down. I love HP(even better, torque), but...$$$ Cheers!
I'll admit I'm not an experienced drag racer, but isn't it more realistic to be thinking about HP/weight ratio?
I would suspect that reducing weight is going to be a lot cheaper (to begin with anyway) than piling on the ponies. But I could be just stating the obvious...
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70 to 100 faster than you can say "whoooossshh!"
sell your car and buy a 240sx and do a sr20det swap and mod the motor you can have close to 500hp for about 20,000. Thats with buying the car!!! You can get a car for about 3500.00 and put 16,500 into it and have a beast... It sounds like your going to be spending that in broken trannys and blown motors
500 Flywheel is not nearly as hard to obtain as 500 whp.. It was covered rather well in the above posts, but 10,000 is going to be needed just for a solid transmission..
If you want 500 then go for 500 but hear me out.. I have spent a lot of time with out my WRX simply becuase you will discover several "Weak Links" in your car.. And they "ALL WILL BREAK" at high power levels.. Simply put your budget will tripple due to upgrading weak links.. Having been in several 300 +/- whp Wrxs, I say that for a daily driver that is plenty.. However, I love my power when it's running..
Edit: for all those that say FWD or RWD is better for drag, there are pros and cons to both.. Sure the AWD drivetrain steels more power then FWD or RWD however it takes a built latteral linked RWD that is tubbed to the hill to keep up with me out of the hole.
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02 WRX.. Tearing up the streets Yet again.. "Hells Yea"..
it takes a built latteral linked RWD that is tubbed to the hill to keep up with me out of the hole.
very true, in my case i raced a decked out srt 4 with bigger turbo and nitrous and i was ahead of him up until about the 1/8th when he sprayed. he had slicks and i think he said 10000 invested into it.
i was about a fender ahead though. launching in an awd is bad-ass. getting your launch down is your best mod. it can dramatically improve or slow your times.
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rollin on 17's now and they're dirty
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