View Poll Results: what compression ratio are your running with boost?

8:1

2.92%

8.5:1

16.06%

9:1

20.07%

9.5:1

25.18%

10:1

24.09%

11:1

11.68%

Voters: 274. You may not vote on this poll

High static compression and forced induction

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02-17-2011, 08:10 PM

#141

NemeSS

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Because it's not readily available in alot of places yet or at all.
I would rather run 9:1 so I have capacity to run up to 15psig on pump octane

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02-17-2011, 10:41 PM

#142

1SlowHoe

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I’ve had a flex fuel truck for 7 years. I have NEVER seen E85 at any pump from Fl to Ok. Where do they have E85? Just Nebraska?

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02-17-2011, 11:00 PM

#143

52172

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I run 9.8:1 compression with 10-12lbs boost and shitty 91 octane gas without any problems and over 10k hard street miles its all in the tune! I know I'm at only 17 deg timing max and a rich 10.7 afr....

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02-19-2011, 03:40 AM

#144

S2VYSS

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Quote:

Originally Posted by AES Racing

TFS 220 as cast heads are 65cc chamber

I've had someone make 685rwhp through twin intercoolers LS 347ci 10:1, D1SC at 12psi.
That setup did get some detonation on pump fuel, IATs were fine though.

Was that on a built bottom end?

Do people think you could get away with 11:1 comp with a PD blower on E85 without too many problems?

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02-20-2011, 12:58 AM

#145

1evilss

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Hey guys im trying to figure out if im gonna be ok with a 10:1 CR on a 402 that gets 93 octane but may switch to e85 ......Also what kinda boost would I be able to run safely? Keep in mind this will be my street/weekend warrior....Car usually sees about 600 miles a summer

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