[Trofeo]

366 whp/ 423 tq on IAG's dyno. I have an 02 WRX, "hybrid" engine, Mahle pistons, EJ205 (stock WRX) heads, 04 STi cams, VF39, 08 STi top mount, 6 speed, ID1000's, custom TGV deletes, stock exhaust manifold, stock intake manifold.

Nothing really exotic, no crazy cams or twin scroll, tune by John Kerr at J-K tuning on his Mustang dyno in Carlisle, PA. He is one of the most underrated engine tuners on the east coast.

I then went to IAG and did 3 pulls on their dynojet just to get comparable number to others in the area.

400 whp is possible, it just might take large cams, ported heads, maybe a billet compressor wheel and a competent, patient tuner that doesn't have an ego as large as IAG's building to accomplish the task

 

[mheyman]

Getting to 350 is not an indicator of being able to reach 400! A given turbo will only flow so much at a given pressure. While I've never seen a compressor chart for IHI turbos, (anyone have them?) every turbo has a limit.

Also while your build/combination of parts is nicely done and gets my compliments it might already be considered out of the norm, and you've just exceeded the 350 number we said someone might make. You're also suggesting modifying the turbo to get to 400 - a mod that is out of bounds to be included in this threads question "Can you hit 400whp on stock turbo/E-85".

One thing I did not see in you post was fuel, 93 or E85? I'll assume E85 since it was the question.

 

[Jay11STI]

With full bolt ons, stock turbo, and E85 fuel these car will not hit 400hp. They usually top out around 350ish whp and 400tq. At that 350whp/400tq you are already approaching if not at the max limitation of the stock block. There are some on here with freak sti's that have ran 400whp on stock block with big turbo and never had a problem (we all know who they are) but most will not be as lucky. In order to run 400+whp safely and successfully on the sti, you will need to build the bottom end and upgrade the turbo along with supporting mods. Keep in mind that a dyno is just a tool and that numbers will vary depending on the dyno.

 

[8cd03gro]

366 whp/ 423 tq on IAG's dyno. I have an 02 WRX, "hybrid" engine, Mahle pistons, EJ205 (stock WRX) heads, 04 STi cams, VF39, 08 STi top mount, 6 speed, ID1000's, custom TGV deletes, stock exhaust manifold, stock intake manifold.

Nothing really exotic, no crazy cams or twin scroll, tune by John Kerr at J-K tuning on his Mustang dyno in Carlisle, PA. He is one of the most underrated engine tuners on the east coast.

I then went to IAG and did 3 pulls on their dynojet just to get comparable number to others in the area.

400 whp is possible, it just might take large cams, ported heads, maybe a billet compressor wheel and a competent, patient tuner that doesn't have an ego as large as IAG's building to accomplish the task

When you swap compressor wheels it's no longer a stock turbo. That's like calling an engine with forged pistons a stock engine. It's a stock frame turbo, but not a stock turbo.

At a certain point the turbo just can't flow enough air to support more power. You could have the best flowing heads in the world, but if the turbo can't push more air it can't push more air. You might get to 400whp with a very extreme setup on some dynos, but it's still going to fall way short on many.

 

[blurred]

Perhaps my tuner is trying pay off his house? But I was looking at the price of a Garrett 3076 and a ETS Front Mount kit, along with a forged motor build.

You're saying I can get multiple of those for the same money? Where?

You're making enough torque now to make well over 500whp at less than 7k rpm... so if you don't need a built motor now, you don't need one to make only 400whp. I'd be scared to drive your car now on stock block at those levels...

 

[blurred]

I had my old Evo X at 400 whp on E-85 with every bolton possble,Is it possible with these motors??

to be honest, its probably possible but, just like evo guys chasing retarded stock this stock that records it is really cost prohibitive.

I'm sure with a purpose built high compression motor, lots of headwork, bigger cams, custom intake manifold, exhaust out the hood, and running methanol you could do it around 5252 rpm (considering some of these cars on normal fuel and stock motors are pretty close to 400wtq at 5252) and then fall like a brick.. the car would still be slow as balls after 3rd gear because the power would be all low end so its kind of pointless

 

[15Z06]

to be honest, its probably possible but, just like evo guys chasing retarded stock this stock that records it is really cost prohibitive.

I'm sure with a purpose built high compression motor, lots of headwork, bigger cams, custom intake manifold, exhaust out the hood, and running methanol you could do it around 5252 rpm (considering some of these cars on normal fuel and stock motors are pretty close to 400wtq at 5252) and then fall like a brick.. the car would still be slow as balls after 3rd gear because the power would be all low end so its kind of pointless

Before E-85 i made 355whp 370wtq spiking 27psi on 93 with 3port,tomei exhaust testpipe and downpipe,ams cai,fmic,tial bov,bigger intercooler piping.Thats it everything else stock on a 2.0.On e85 i hit 400 with stock internals so why is it so much lower with the Sti and take so many more parts I just dont get it,they do make alot more TQ.

 

[blurred]

Before E-85 i made 355whp 370wtq spiking 27psi on 93 with 3port,tomei exhaust testpipe and downpipe,ams cai,fmic,tial bov,bigger intercooler piping.Thats it everything else stock on a 2.0.On e85 i hit 400 with stock internals so why is it so much lower with the Sti and take so many more parts I just dont get it,they do make alot more TQ.

Evo has a much bigger turbo so it can make that torque at a higher rpm and when you apply the math, that equals more hp.

What you are asking is similar to "can an evo make 450whp on stock unported turbo?". Kind of near impossible (on gasoline). And it'll cost you massively for building a motor and head, plus every other mod possible, probably electric water pump, electric power steering pump etc... So its really pointless as it is just cheaper to buy a slightly bigger turbo.

 

[15Z06]

Evo has a much bigger turbo so it can make that torque at a higher rpm and when you apply the math, that equals more hp.

What you are asking is similar to "can an evo make 450whp on stock unported turbo?". Kind of near impossible (on gasoline). And it'll cost you massively for building a motor and head, plus every other mod possible, probably electric water pump, electric power steering pump etc... So its really pointless as it is just cheaper to buy a slightly bigger turbo.

Whats the max psi on stock block with e-85?

 

[blurred]

Whats the max psi on stock block with e-85?

I don't understand the question. That all depends on which block you are talking about (evo? Sti?), which mods, which eXX fuel, which tuner, etc etc ... meaningless tbh.

 

[15Z06]

Just so no one thinks im trollin.
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