WHP Limit on STi Block
Sep 28, 2006, 08:40 PM
#31
I know what you mean, the engine gets so strong that it actually starts pushing and pulling back and forth however you are probably cracking your A S S about the motor mount comment on making power right? 
It is no secret that a full set of good motor mounts and engine dampering shock can significantly reduce the vibration and enhance acceleration base on a more solid powerplant however motor mounts affecting the engine output? that is simply false.
Carlos
Last edited by fromWRXtoEVO; Sep 28, 2006 at 08:43 PM.
Sep 28, 2006, 08:48 PM
#33
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Originally Posted by 520hpsti
lol he will walk you on pump also. he should be at mid 400's on pump w/o the meth.
sick numbers for the stock turbo though
sick numbers for the stock turbo though
Well now him at 19psi I can still walk him.. so I mean I dunno. I saw an STi with GT35R on Supraforums race a Z06 with intake (C5 Z06) and it BARELY pulled it.
Sep 28, 2006, 08:55 PM
#34
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Originally Posted by Soon2BEVO
I searched around NAOSIC and didnt find one person putting down 450awhp with 35R on straight pump. Mostly 400-425.
Well now him at 19psi I can still walk him.. so I mean I dunno. I saw an STi with GT35R on Supraforums race a Z06 with intake (C5 Z06) and it BARELY pulled it.
Well now him at 19psi I can still walk him.. so I mean I dunno. I saw an STi with GT35R on Supraforums race a Z06 with intake (C5 Z06) and it BARELY pulled it.
either way though, right now if he is on the vf39 i sure hope you can walk him haha. the evo turbo is considerbly larger than the stock sti turbo. the vf39 maxes out at about 21-22psi. but if he has a 35r and you are on your evo stock turbo im sure he will walk you.
we are jelous of you evo guys making sick power on the stock turbo, especially the guys with the 9's. anything over 320whp is unheard of on the stock sti turbo and hardly over 350 wtrq.
also remember each dyno reads differently.
Sep 28, 2006, 09:00 PM
#35
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Originally Posted by 520hpsti
i was just giving out a random number, im sure your correct, i didnt look up numbers.
either way though, right now if he is on the vf39 i sure hope you can walk him haha. the evo turbo is considerbly larger than the stock sti turbo. the vf39 maxes out at about 21-22psi. but if he has a 35r and you are on your evo stock turbo im sure he will walk you.
we are jelous of you evo guys making sick power on the stock turbo, especially the guys with the 9's. anything over 320whp is unheard of on the stock sti turbo and hardly over 350 wtrq.
also remember each dyno reads differently.
either way though, right now if he is on the vf39 i sure hope you can walk him haha. the evo turbo is considerbly larger than the stock sti turbo. the vf39 maxes out at about 21-22psi. but if he has a 35r and you are on your evo stock turbo im sure he will walk you.
we are jelous of you evo guys making sick power on the stock turbo, especially the guys with the 9's. anything over 320whp is unheard of on the stock sti turbo and hardly over 350 wtrq.
also remember each dyno reads differently.
Ill have it on video when hes tuned and whatnot... we wil do 2nd and 3rd gear roll-ons and I will not be suprsied if he doesnt pull me much at all with my power and my torque and instant response. My powerband is far superior at the moment.
Last edited by Soon2BEVO; Sep 28, 2006 at 09:07 PM.
Sep 28, 2006, 09:05 PM
#36
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Originally Posted by Soon2BEVO
Yeah most pump numbers I found were around 420whp but the thing is they didnt make that great of torque and theyre spooling between 4700-5000rpm. I think the worst thing about the STi is the gearing. Its so damn short everytime that monster turbo spools and starts pulling you shift.. at least thats how it felt when he took me for a ride.
Ill have it on video when hes tuned and whatnot... we wil do 2nd and 3rd gear roll-ons and I will not be suprsied if he doesnt pull me much at all with my power and my torque and instant response.
Ill have it on video when hes tuned and whatnot... we wil do 2nd and 3rd gear roll-ons and I will not be suprsied if he doesnt pull me much at all with my power and my torque and instant response.
IMO you will pull a little at first, but when he spools he will pull on you pretty hard.
definetly an interesting comparison though.
Sep 28, 2006, 09:12 PM
#37
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Originally Posted by 520hpsti
i hope you mean fully spooled b 4700 because i have the fp3575 and i start spooling right around 4000 and am fully spooled by 4700ish. Usually torque is right around the whp # on the sti, the 2.5 is a pretty torquey motor. I have 500+ wrtq also and 500 whp +. Yes the sti gearing is not very good for big turbos and the 1/4. the 5 speed on the evo is better for the 1/4, but it is nice having a 6th gear on the highway.
IMO you will pull a little at first, but when he spools he will pull on you pretty hard.
definetly an interesting comparison though.
IMO you will pull a little at first, but when he spools he will pull on you pretty hard.
definetly an interesting comparison though.
Ill let the videos of when we race speak for themselves.
Sep 30, 2006, 06:05 AM
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Originally Posted by 520hpsti
590whp has been reached on the stock sti block.
Its all about the tune, but IMO if you go over 400whp you must get a built block. you ahve to pay to play. We dont have the pleasure of having the amazing motor of the 4g63 because the ej series is new compared to the 4g63. Also the pistons in the ej25 are the weak points as it already ahs forged rods and a forged crank. If you drop in pistons the block should take 500 whp with a good tune.
go to www.iwsti.com for more information. its a sti specific forum and probably one of the best forums around in general.
Oh and your friend seems a littel confused.. Just because he is running meth injection doesnt mean he will run 30psi. More like 22-23psi on the street. Now on race gas 30+ psi is not a problem.
If hes running pure methanol ( which i doubt) than ya 3opsi would be good.
You cant expect a stock ej25 block to hold 600whp and i doubt it will last long if it doesnt blow during tuning. It must have a perfect tune and the owner must baby the car to reach that level without blowing it up.
If you go big you better have the cash to spend when something breaks, because something will when on the stock block.
the plus side is a stock sti tranny is good for 600whp+ so he really only needs to worry about the block.
Its all about the tune, but IMO if you go over 400whp you must get a built block. you ahve to pay to play. We dont have the pleasure of having the amazing motor of the 4g63 because the ej series is new compared to the 4g63. Also the pistons in the ej25 are the weak points as it already ahs forged rods and a forged crank. If you drop in pistons the block should take 500 whp with a good tune.
go to www.iwsti.com for more information. its a sti specific forum and probably one of the best forums around in general.
Oh and your friend seems a littel confused.. Just because he is running meth injection doesnt mean he will run 30psi. More like 22-23psi on the street. Now on race gas 30+ psi is not a problem.
If hes running pure methanol ( which i doubt) than ya 3opsi would be good.
You cant expect a stock ej25 block to hold 600whp and i doubt it will last long if it doesnt blow during tuning. It must have a perfect tune and the owner must baby the car to reach that level without blowing it up.
If you go big you better have the cash to spend when something breaks, because something will when on the stock block.
the plus side is a stock sti tranny is good for 600whp+ so he really only needs to worry about the block.
I personally don't see a stock Ej25 lasting very long with 590 whp on a stock block. That's just a time bomb right there....
Sep 30, 2006, 07:34 AM
#41
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Originally Posted by Sinister Subaru
+1, and while the Ej25 does have a semi-closed deck, every other motor out there also has some weaknesses. Look at the 4g63. Crank walk? They're also known to eat oil if not broken in correctly.
I personally don't see a stock Ej25 lasting very long with 590 whp on a stock block. That's just a time bomb right there....
I personally don't see a stock Ej25 lasting very long with 590 whp on a stock block. That's just a time bomb right there....
the transfer cases seem to be more of a problem on the evos, but gotta respect em and they power they make per $$.
but yes a stock ej with 590whp or IMO 500+whp wont last very long.
Sep 30, 2006, 09:03 AM
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Originally Posted by 520hpsti
well the crank walk had to do mostly with the 7 bolt design, while the 6 bolts were less prone to it.
the transfer cases seem to be more of a problem on the evos, but gotta respect em and they power they make per $$.
but yes a stock ej with 590whp or IMO 500+whp wont last very long.
the transfer cases seem to be more of a problem on the evos, but gotta respect em and they power they make per $$.
but yes a stock ej with 590whp or IMO 500+whp wont last very long.
Sep 30, 2006, 05:10 PM
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^ haha thats so true!
i also dont know how you think that. the aftermarket is just so much bigger for the 4g63 compared to the EJ series. its not a fair comparison.
And look at the evo x. They are using the 4B11, and noone really knows how the aftermarket is going to be for that.
i also dont know how you think that. the aftermarket is just so much bigger for the 4g63 compared to the EJ series. its not a fair comparison.
And look at the evo x. They are using the 4B11, and noone really knows how the aftermarket is going to be for that.
Sep 30, 2006, 06:43 PM
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Originally Posted by E. Haskell
Give them room to play and when they do -- cancel the hell out of their warranty
With the STi, it appears that Subaru threw in just enough to get the job done.