My build 396 cid on E85 w/ 14:1
10-19-2014, 02:13 PM
#345
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So I came across a deal for a supercharger off of a zl1 and can get all of the accessories for it as well for a good price. I am contemplating switching to lsa heads and running this with my high compression. However, I am not sure if FI would work well with high compression even when e85 is used. Does anyone know?
10-19-2014, 06:26 PM
#347
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I wasn't sure since I know almost nothing about FI. I also wasn't sure if e85 allows for more compression with FI. How much lower would I need? I could probably drop it a few points with other heads and a different head gasket.
10-19-2014, 08:10 PM
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Good point I could do that I just figured I could run higher compression with e85 but I wasn't sure how much and if I didn't have to swap out the pistons I wasn't going to.
10-19-2014, 09:07 PM
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.060 thick head gasket is what I was looking at. .051 ls3 gasket will put it at 12.1 and ls9 will put it at 12.01. I am also figuring 70cc chamber lsa heads.
Last edited by 98TransAmWs-6; 10-19-2014 at 09:12 PM.
10-19-2014, 09:42 PM
#357
You won't want to run 20 plus pounds of boost, but 8-10 would be fine @11.5 compression. NA engines are quench sensitive but nitrous and boosted don't seem to care. A larger chamber with a .070-.080 gasket would still be fine should you decide to change up the combo. You will want to run a quality E85 as pump stuff can vary a bit and the higher static with the boost will narrow the happy range.
10-19-2014, 10:07 PM
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You won't want to run 20 plus pounds of boost, but 8-10 would be fine @11.5 compression. NA engines are quench sensitive but nitrous and boosted don't seem to care. A larger chamber with a .070-.080 gasket would still be fine should you decide to change up the combo. You will want to run a quality E85 as pump stuff can vary a bit and the higher static with the boost will narrow the happy range.
10-19-2014, 11:34 PM
#359
10-20-2014, 11:31 AM
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Well Martin said on just e85 he wouldn't want the compression any higher than 11.5. I'll see if I can get it down that low. It is really going to depend on my heads and gaskets I run.