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Old 02-19-2012, 08:31 PM   #11
SoBe-it
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thats all i ever used in my old setup, but i think there is a station next town over that sells e85.

how thick of a gasket would i need to lower it to the sweet spot. i could always change gaskets if im un-happy
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Old 02-19-2012, 09:15 PM   #12
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400 is easy to get to. You can get it on 8:0 compression lol. But if you talk to alot of ppl making big power most are at 10:0 compression or wish they were. I'm at 9:0 but if the motor fails I'll go up to 10:0
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Old 02-19-2012, 11:29 PM   #13
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I bought my car with 8.5:1 compression, but if I could have built the motor myself, definitely would have gone with 10:1. With low compression, slow off-boost response is very noticeable. Even on a torquey 2.3L, car is not fast at all out of boost.
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Old 02-20-2012, 06:49 AM   #14
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My last motor was between 8-8.5:1 and wasnt slow off boost, with 93 octane and a little GT28rs... and still put down 385whp on it with room to grow in the tune.
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Old 02-20-2012, 08:22 AM   #15
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The diff in spool time between 9.0 and 10.0 would be maybe 400 rpm MAYBE , if you want quicker spool go to a smaller turbo , smaller cams if you were not stock

People need to keep in mind its air and fuel that makes the power and the less that gets in there the less power and the more heat , heat is the killer

If this were a Duratec , Honda , Nissan , LS engine then yes I would go higher compression because those engines are far more efficient

And stay away from E85 it sucks as a performance fuel

Tom
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Old 02-20-2012, 12:26 PM   #16
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Quote:
Originally Posted by 1turbofocus View Post
The diff in spool time between 9.0 and 10.0 would be maybe 400 rpm MAYBE , if you want quicker spool go to a smaller turbo , smaller cams if you were not stock

People need to keep in mind its air and fuel that makes the power and the less that gets in there the less power and the more heat , heat is the killer

If this were a Duratec , Honda , Nissan , LS engine then yes I would go higher compression because those engines are far more efficient

And stay away from E85 it sucks as a performance fuel

Tom
for starters 400rpm and you write that off? thats a huge difference!

why does it matter what engine you have? you discount and talk down the zetec complain about how it doesnt make as much power yet somehow people are making 600whp with out getting crazy. People say it cant make power N/A yet somehow it is one of the most widely used engine in RWD 4cyl kit cars worldwide and those people are taking them and building 10k rpm 300hp N/A monsters, its just too bad no one has put one in a fofo yet or made a 10k rpm turbo motor.

E85 sucks as a performance fuel? I guess you are saying Vic Edelbrock Jr, one of the most well respected figures in vehicle aftermarket history, is full of shit? Because he strongly disagrees with you
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Old 02-20-2012, 06:09 PM   #17
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So with your vast engine building background and tuning you would go an extra point or more of compression just to have the 400 rpm quicker spooling ? and no 400 rpm quicker spooling isnt "huge"

As for the "why does it matter what engine you have" this is where building engines and tuning would tell you why it matters what engine your working on when one 2.0 engine makes 300 at 15psi and another 2.0 engine makes 380 at 15psi with basicly the same turbo thats hugh in what one engine can do over another and what static compression you can run

Yes E85 sucks as a performance fuel , its amazing how all your talk is yes but ????? is doing it or yes but ???? is running it , you have no idea what your talking about or how things work because you havent been out there doing it building it or tuning it , when you get to that point then come back and talk to me about what works I think your opinion of what works will change when YOU have to do it and not read about it

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Old 02-20-2012, 08:40 PM   #18
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Tom, you need to come on over to the Mazdaspeed forum and see what people are doin there with e85. Just give it a shot
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Old 02-20-2012, 09:20 PM   #19
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Shaking my head, on the other hand tho 400rpm is huge.
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Old 02-20-2012, 09:47 PM   #20
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Everyone can agree on one of these being the best bet...

High Compression Turbo
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