Build 14.1 CR in LS1 for E85 daily drive?
06-02-2010, 09:53 PM
#2
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06-03-2010, 03:31 AM
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pretty sure Katech was only 13:1, relatively small cam(torquer) so DCR was high...might could get away with 14:1, but it'd have to be a big cam to bleed off some of the cylinder pressure
06-03-2010, 03:33 AM
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pretty sure Katech was only 13:1, relatively small cam(torquer) so DCR was high...might could get away with 14:1, but it'd have to be a big cam to bleed off some of the cylinder pressure
06-03-2010, 03:34 AM
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pretty sure Katech was only 13:1, relatively small cam(torquer) so DCR was high...might could get away with 14:1, but it'd have to be a big cam to bleed off cylinder pressure
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06-03-2010, 10:44 AM
#9
I thought e85 was closer to a 13.5:1...but I guess a big cam could bleed some of that off...
it is not going to happen on a sbe unless you weld up the chambers...you can probably get to around 12.3-4 with stock flycut pistons...put that is pushing the flycut and ptvc...
I plan on doing this sometime in the future with a 347...
let us know how it turns out if you decide to tackle this beast
06-07-2010, 08:37 AM
#11
I like cheap power. I have some 241's I "home" ported (290's at .600 with stock 2.0 valves, but I port LS heads regularly) and a big cam (23x/24x). Just over 12-1 (57 cc). Milling the heads further imo would have required deeper flycuts into the pistons, more than I was comfortable running. I already have .110 deep cuts into it, almost half the depth of the crown. I also went with a Typhoon intake which i went in and ported myself with a matching 85mm tb that I also ported myself. I don't want to hear about heat soak because it works both ways. How cold do composite intakes get with a couple bags of ice sitting on the intake for a half hour before a track run? 
The speed density / e85 tune local is only $350 and I have less than $1500 into the top end (H/C/I). This build needs injectors of course because the e85 a/f ratio is a lot richer. So putting just over 2k into an engine that should run right with and even faster than some top dollar combos is very rewarding to me.
The speed density / e85 tune local is only $350 and I have less than $1500 into the top end (H/C/I). This build needs injectors of course because the e85 a/f ratio is a lot richer. So putting just over 2k into an engine that should run right with and even faster than some top dollar combos is very rewarding to me.
06-07-2010, 10:16 AM
#12
I like cheap power. I have some 241's I "home" ported (290's at .600 with stock 2.0 valves, but I port LS heads regularly) and a big cam (23x/24x). Just over 12-1 (57 cc). Milling the heads further imo would have required deeper flycuts into the pistons, more than I was comfortable running. I already have .110 deep cuts into it, almost half the depth of the crown. I also went with a Typhoon intake which i went in and ported myself with a matching 85mm tb that I also ported myself. I don't want to hear about heat soak because it works both ways. How cold do composite intakes get with a couple bags of ice sitting on the intake for a half hour before a track run? The speed density / e85 tune local is only $350 and I have less than $1500 into the top end (H/C/I). This build needs injectors of course because the e85 a/f ratio is a lot richer. So putting just over 2k into an engine that should run right with and even faster than some top dollar combos is very rewarding to me.
The speed density / e85 tune local is only $350 and I have less than $1500 into the top end (H/C/I). This build needs injectors of course because the e85 a/f ratio is a lot richer. So putting just over 2k into an engine that should run right with and even faster than some top dollar combos is very rewarding to me.very true, can't wait to see the setup rip it up...but remember with cost not all of us have your porting skillz...we gotta pay for your talent...
but my uncle owes a shop in Crete, il so I do get some free labor too, (milling, vsi discounts, etc)...
who is doing the tune (pm if necessary)
06-16-2010, 06:36 PM
#13
Leno's was 11:1.
We've done E85 engines at 13:1. You could probably get away with 14:1 but we usually stick on the conservative side. If you got some E70 in the fall, winter or spring it could be harmful. The cam in Leno's engine was even milder than the Torquer because we were attempting to get a CARB certification on it.
