is the money worth 500+hp

[silversurfer307]

ok well first off my hp goal in my sti is 500hp at the moment so im trying to price the engine build.i got a quote from Axis power racing and for a stage 5 shortblock it was $5850 dollars.This includesStage 5 Components:
- 2.5L USDM STi Semi-Closed Deck Case
- Axis Racing/Darton Ductile Iron Sleeves
- Custom Axis Racing Forged Crankshaft
- Polished & Balanced to 10,000 RPMS
- Axis Racing/ CP forged Pistons With Swain Tech Coatings
- Pauter 4340 Chrome-Moly Forged Rods
- Larger ARP head studs
- Cometic Head Gaskets
- 2.5 liter Final Displacement
- MAX 9000 RPM Rev LimitThe heads will include this pricing
Porting-$1500
AVCS camshafts-$1000
Dual spring valvetrain kit-$1500- This also comes with +1mm oversize valves now
so are these good prices i dont know its the first place i tried just trying to get a good idea.

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[WebMasterP]

You probably don't need all that to make 500whp safely on an STI block.

Hell, you could probably get away with new forged pistons installed by an engine builder and have it run a long while with a good tune and a GT35.

Well, on race gas.

[Infamous1]

^^^
Or pump+meth.

[jays05]

I agree. Overkill for 500whp... 600whp on the other hand...

[silversurfer307]

so what should i get to safely run 500hp daily

[WebMasterP]

Originally Posted by silversurfer307

so what should i get to safely run 500hp daily

Do what Infamous1 said, run on 50/50 water/meth injection. People do that on daily drivers. I think a lot of people have reported having to fill the meth/water every 2 fill ups or something like that. It's not expensive either.

[illini_wrx]

You just have to be careful with water+meth never to run out and forget to refill it. Also, there are threads discussing how injecting too much water may have caused cylinder wash and oil starvation.

The most intriguing thing about a motor like that to me is the redline... match it up with a huge turbo and you'll not only be making 500whp, but you'll be doing it in a 4000rpm-wide usable range... that my friend, is ! So I say, go for it!

Also, have you considered what other mods you have to make to have reliable 500whp?? (i.e. transmission and driveline...)

[Josey Wales]

What's your definition of reliable? 500 whp is a VERY grey area.

[PaulRex]

Shouldnt a goal be to run a certain time at the dragstrip, or maybe beat up on corvettes on the roadcourse etc. But when people say their goal is xxxx amount of horsepower i dont get it??

OTOH that motor build up there is definatly overkill for 500whp, but it sound like a hell of a block. reliablity is kind of subjective is right.. but once your in that deep with your cars build your going to end up paying whatever it costs to keep it running anyway.

[MJU1983]

Originally Posted by silversurfer307

so what should i get to safely run 500hp daily

A new z06? Maybe a new M5 or M6?

[silversurfer307]

ok well ill just say my goal is to be able to beat a new dodge viper and there is this twin turbo corvette where i live that i would love to beat.i realize i need other parts besides the motor.soo what would any of you recommened to be this fast.

[PaulRex]

Originally Posted by silversurfer307

ok well ill just say my goal is to be able to beat a new dodge viper and there is this twin turbo corvette where i live that i would love to beat.i realize i need other parts besides the motor.soo what would any of you recommened to be this fast.

there we go.. well beating a viper is doable but they can easily be brought unto the low 11s and 10s with mods.. and a twin turbo corvette.. damn i dunno. I had a friend with a supercharged corvette C5 with some minor motor work to handle the boost and it was insane. trap 130+ easily.. i wouldnt think a twin turbo vet is too far off from that

That motor build you posted sound like a good idea when you compare it to those kinds of cars

In the end spending money and time just to give it to some guy on the block sounds unrewarding to me but what do i know..

[MJU1983]

A lot of people tend to want to cut corners but fail to realize what they are asking the engine to do.

You want street driven reliability, daily driven, and 500hp out of 2.5 liters.

This is going to cost you, and cost you dearly I am afraid. If you step back and look at what you are asking, it certainly won't be "easy" or CHEAP to do by any means.

If you take the price of a brand new STi + the price of the modifications necessary to obtain these power levels safely, you might as well have bought the Dodge Viper that you are building a Subaru to beat.

Just my 2 cents.

-Mike

[MJU1983]

Originally Posted by PaulRex

I had a friend with a supercharged corvette C5 with some minor motor work to handle the boost and it was insane. trap 130+ easily.. i wouldnt think a twin turbo vet is too far off from that

Long tubes (full exhaust), cam (g5x3 or eqv) + valvetrain, nitrous, drag radials....130-140 traps all day long.

[STimo]

I can beat a new viper on pump gas with my 30R, so it's defiantely doable.. From a stop no problem, from a roll i'm usually ahead by around 1.5 cars, give or take a bit.. New z06 i can take too from a stop, from a roll it's pretty even, but the zo6 will usually pull by a half car or so once we are at 90+mph.. I've been running this setup on my stock motor for ~15K miles and not a problem so far (knock on wood).. If your goal is to just beat a stock viper that can easily be done with a 30R/35R setup.. If you wanna destroy one just add meth/race gas tune.. If i were you i';d run it on the stock block till it lets go, it's free mileage and it can last for a long time if you have a good tune.. a twin turbo vette on the other hand, isnt gonna happen.. Those things can make 1000whp all day..

EDIT: I only raced that viper twice and i forgot to mention that it was the convertible so im sure a hard top would be closer.

[Josey Wales]

Originally Posted by MJU1983

A lot of people tend to want to cut corners but fail to realize what they are asking the engine to do.

You want street driven reliability, daily driven, and 500hp out of 2.5 liters.

This is going to cost you, and cost you dearly I am afraid. If you step back and look at what you are asking, it certainly won't be "easy" or CHEAP to do by any means.

If you take the price of a brand new STi + the price of the modifications necessary to obtain these power levels safely, you might as well have bought the Dodge Viper that you are building a Subaru to beat.

Just my 2 cents.

-Mike

+12345

You are pushing serious power with little displacement. Even the best built motor will eventually fail.

If you are looking for a reliable, 10 second, straight-line car you might want to consider alternatives.

[burnin4]

stock motor+UR gt35r kit+meth/pump or c16 = 500whp.

you cant go wrong with an axis motor, but you'd really be surprised what the stocker can handle.

[MJU1983]

Originally Posted by STimo

I can beat a new viper on pump gas with my 30R, so it's defiantely doable.. From a stop no problem, from a roll i'm usually ahead by around 1.5 cars, give or take a bit.. New z06 i can take too from a stop, from a roll it's pretty even, but the zo6 will usually pull by a half car or so once we are at 90+mph.. I've been running this setup on my stock motor for ~15K miles and not a problem so far (knock on wood).. If your goal is to just beat a stock viper that can easily be done with a 30R/35R setup.. If you wanna destroy one just add meth/race gas tune.. If i were you i';d run it on the stock block till it lets go, it's free mileage and it can last for a long time if you have a good tune.. a twin turbo vette on the other hand, isnt gonna happen.. Those things can make 1000whp all day..

Beat it how? I dunno if I buy it man. How much HP/ Torque are you putting down with pump gas and a GT30? I mean the STi weighs damn near what the Vette & Viper do, and you have to consider all the power under the curve they are making. The gear ratios alone in the z06 (and viper) will leave you looking for 5th (in the 1/4 mile) while he is most likely only in 3rd. Also, unless they REALLY can't drive, their traps should be 125 or higher in the 1/4 mile and they will keep screaming all the way to top speed! lol

[burnin4]

fwiw, I murdered a gts viper from a roll. it would have been ugly from a dig. i was making 500whp on 93+meth, ur 35r kit, stock motor. I also have a good friend with the same setup, he pulled 2-3 cars on a c6 z06 from a roll (50-140mph), running c16 (550whp on topspeeds dynojet). the c6 z06 might have eventually caught him, they ran 3 times with the same results.

[dan avoN7]

beating a new srt10 viper on pump gas is hard to believe, race gas for sure. My old gt3040r turbo @ 28psi on a sti 2.0 block pulled on a stock srt10 viper and back then i was making 387whp (very low reading dyno) My new Axis built 2.5 with a 35r on 110octane will destroy a stock viper from a roll. Car is now making 484whp on a same reading dyno, a stock srt10 viper puts down 380whp on this same dyno not too long ago

[jbones]

i say do it, im waiting to save my money up. to do my build. But ya i rather spend money into my subaru. But ya you going to need fatty turbo,fmic,injectors,exhaust,i would say ppg gears =) new clutch, some type of computer. alot of **** to safely do that. But i say its worth it

[Homemade WRX]

a piston/rod sti will make that power...sleeving is overkill until you decided you want more

what are you looking to do with the car? track days, auto-x or drag?
and I'm know you want to keep it a street car.

[Devan M]

I heard that Cowsworth stoped selling sleeved blocks, anybody else heard this?

[flycaster]

Originally Posted by Devan M

...Cowsworth...

Was that intentional?

[jays05]

Originally Posted by Devan M

I heard that Cowsworth stoped selling sleeved blocks, anybody else heard this?

I also read this. But why?