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Old 02-27-2004, 12:36 AM   #1
Shaitiger
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Default Which turbo can make 350awhp on 93 octane

My buddy is looking for a bolt-on turbo for his STi that will make 350 awhp on 93 octane with supporting mods and no nitrous. I'm guessing SR40/50, 18/20G, or PE1820. Again, he's not interested in running anything except 93 octane. Any info would be appreciated.
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Old 02-27-2004, 01:09 AM   #2
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It will be very difficult to make 350whp with any turbo that is bolt on with 93. You're really boost limited by running that octane and without the boost you won't make the hp.

A FPgreen or AVO500 are your best bets though.
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Old 02-27-2004, 02:02 AM   #3
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Stock turbo, full supporting mods, Dynojet.

Done
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Old 02-27-2004, 03:10 AM   #4
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Quote:
Originally posted by mr2guru
It will be very difficult to make 350whp with any turbo that is bolt on with 93. You're really boost limited by running that octane and without the boost you won't make the hp.

A FPgreen or AVO500 are your best bets though.
How is it that you should make 400whp on 93 pump?

PS: saturday 12pm.

-Mike
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Old 02-27-2004, 03:33 AM   #5
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Quote:
Originally posted by MJU1983
How is it that you should make 400whp on 93 pump?

PS: saturday 12pm.

-Mike
I would love to, might come close But I have cams and headwork too. The green will def be the limiting factor.

I was talking in terms of a BPU STi, without running 20+ psi (hard to do on pump) it will be tough make 350whp. Especially with a bolt on turbo.

BTW, mike, OT but ever seen the "gixxer kart" ? Money laid out...parts have been bought...look for updates
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Old 02-27-2004, 07:22 AM   #6
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SR50 will do it. MZM got right around 350WHP on 93oct.
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Old 02-27-2004, 08:03 AM   #7
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Jim,
Not going to be able to make it up there this weekend. Might see you up there next weekend. See now you give me even more reason to come up for Imprezafest(gixxerkart)I have that video and watch it often. But, keep me posted on how the girl does this weekend now that you have your boost gremlins in order!!

Richard
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Old 02-27-2004, 09:22 AM   #8
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Quote:
Originally posted by XT6Wagon
Stock turbo, full supporting mods, Dynojet.

Done
This is hilarious.
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Old 02-27-2004, 09:36 AM   #9
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Gabe,

20G will do great with no serious lag. Your going to have to boost to at least 19-20PSI though. My Mr-2 with 2.0 liter made 306whp on pump gas at 16PSI on the 20G. Mr-2 has higher compression, STI has more displacement so I would say they should be about even on that turbo.

Why chance it though? STI is not the motor you want to push on pump gas. At least till reliability has been proven.
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Old 02-27-2004, 10:19 AM   #10
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Quote:
Originally posted by wgknestrick
SR50 will do it. MZM got right around 350WHP on 93oct.
I read that Christian's car (374WHP) just blew something in cylinder 4 (ring?). He didn't elaborate further.

-st
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Old 02-27-2004, 10:26 AM   #11
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Me 2. That has me worried
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Old 02-27-2004, 10:38 AM   #12
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Quote:
Originally posted by TCENGEL
Why chance it though? STI is not the motor you want to push on pump gas. At least till reliability has been proven.
Exactly Tim. This is just a goal. Whether or not it happens depends on what we find out in the next couple of months.
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Old 02-27-2004, 10:50 AM   #13
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Why not consider the GT35R? Just too laggy?
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Old 02-27-2004, 10:52 AM   #14
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Why God? Just you can't crack 300WHP on a stock turbo w/o resorting to racegas?

And before you mouth off, A car that I had *NOTHING* do do with hit 299WHP with just a intake, TMIC, TBE, exede and pumpgas. On the dyno at Matrix. Which reads about the same as a dynodynamics... Which reads a fair bit lower than the dynapak.

Gee maybe he could have cracked 300 with some other supporting mods. Maybe the higher than hell reading dynojet would have popped out a 350+ number.
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Old 02-27-2004, 11:36 AM   #15
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See, the thing about all of the piggyback units for the STi is that you are still not getting a consistent tune. You have the same delay time for the computer to switch over to open loop boost as the 04 WRX if my source was correct. So, I still wouldnt trust a "tune" with just a piggyback ecu for an STi. I think the UTEC will be the only feasable answer and still be able to keep the factory ecu for idling, cold starting, crusing, and such. Ah well, I think that proper engine management is the only thing that is holding back the sti's from being reliable making big numbers.

XT6Wagon,
I dont see that happening either with the stock turbo. But, I could be totally off base and incorrect. I am not saying that you are wrong, mearly that it is hard to believe that number on a dyno that is actually worth a crap, hmm? Anyways, back to the original topic.

Sorry if I brought this off topic at all.

Richard
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Old 02-28-2004, 10:57 AM   #16
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Quote:
Originally posted by XT6Wagon
Why God? Just you can't crack 300WHP on a stock turbo w/o resorting to racegas?

And before you mouth off, A car that I had *NOTHING* do do with hit 299WHP with just a intake, TMIC, TBE, exede and pumpgas. On the dyno at Matrix. Which reads about the same as a dynodynamics... Which reads a fair bit lower than the dynapak.

Gee maybe he could have cracked 300 with some other supporting mods. Maybe the higher than hell reading dynojet would have popped out a 350+ number.
I did 312 whp on pump gas on stock turbo and exhaust thank you. I did 322 whp on race fuel. There is nothing left in that baby apart from porting it and adding an exhaust maybe. 350 whp is not achievable either with stock turbo or with stock injectors (on pump fuel). Just for laughs though. Here. Bring an STi here with stock turbo and pull 350 whp on my dyno (race fuel is fine) and I'll take you out for a steak dinner. Sound good?
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Old 02-28-2004, 12:36 PM   #17
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Yum, steak.
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Old 02-28-2004, 01:23 PM   #18
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haha...god has offered so many steak dinners, but i dont think he has bought one yet!
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Old 02-28-2004, 01:26 PM   #19
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Quote:
Originally posted by singletrack
I read that Christian's car (374WHP) just blew something in cylinder 4 (ring?). He didn't elaborate further.

-st
that means both of the cars that I know of have both had engines let go.
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Old 02-28-2004, 01:27 PM   #20
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This thread isn't about stock VF39 capabilites. Stay on topic please.
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Old 02-28-2004, 01:39 PM   #21
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I think a VF22 can pull 350whp.

I'll have data to back up my thoughts after march 21st.

ported & polished Vf22 (running around 20 psi), header, xede, catless TBE, Injectors, bigmaf, pump, cold air, stock STI TMIC, turbo inlet pipe, turbosmart BOV/BPV,
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Old 02-28-2004, 01:57 PM   #22
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VF22 can easily pull 350 awhp and beyond.....it can be done on a 2.09 liter so certainly can be done on a 2.5.

VF39? Ain't gonna happen - ther AR of the exhaust side is simply too small to hit that kind of figure on boost alone.

A 22 or 23 could get you there, though something along the lines of an 1820 much more easily, without the spool issues some of the other turbos out there have. 1820 is very livable for everyday when tuned properly.....price is the biggest barrier here IMHO.

The key to ANY of these setups is going to be proper engine management, as it is on any other car. Best components in the world can equal a truly slow car if they are not carefully planned out and tuned to work with one another. Once the UTEC is out for these cars, I think you'll find more than a few 400 hp STi's roaming around, and doing so safely.
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Old 02-28-2004, 03:20 PM   #23
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Z1.... quick question.

What do you think a safe boost level to run with a vf22 is on a 2.5 sti motor with the above mods??

Jerry from deadbolt told me it should be ok to 22-24 lbs, your opinion?
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Old 02-28-2004, 03:29 PM   #24
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Quote:
Originally posted by Z1 Performance
VF22 can easily pull 350 awhp and beyond.....it can be done on a 2.09 liter....
On pump gas??? I call BS
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Old 02-28-2004, 03:37 PM   #25
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Quote:
Originally posted by mr2guru
On pump gas??? I call BS
We'll see in 2 weeks I'll post my results. If Dan can make 312 on pump with a 39 350 should be a breeze with the 22
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