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Post by 5galbucket on Aug 21, 2020 7:13:40 GMT -5
I've skimmed through these forums and haven't found a lot of people experimenting with raising the compression on the 2.3T. It seems the new norm in both factory and aftermarket builds are to run much higher CR's than the 2.3T's 8:1. IE: The factory 3.5 eb runs 10-10.5:1 (365-450hp), and a friend of mine built a turbo 6.0 LS with 9.4:1 cr. And yes with a huge IC, alky injection, and a Fast engine management system, just pulled 1200rwhp on a dyno using 93 octane pump gas. I have an 88 turbo coupe and an 84 SVO. I'm starting to plan an engine build for the SVO and was curious what the stinger team thought about this subject.
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Post by Stinger on Aug 21, 2020 16:05:30 GMT -5
Direct injection (like many modern engines) allows for much higher compression. So the EB example and other DI engines can get thrown out for that reason.
Modern combustion chamber designs also allow for higher compression ratios, we don't have those on 2.3's. We have old open chamber heads designed in the 70's.
Running alky injection on the LS means it's not on "93 octane pump gas" as the alky injection significantly raises the octane.
You can run higher compression on a 2.3 but you either have to run the boost down on pump gas, or you have to run better fuel (e85, alky injection, race fuel, torco additive, etc.) to prevent detonation. Plenty of people run 9:1 or 9.5:1 on race gas or E85 with 2.3's. With pump gas you're better off leaving it around 8-8.5:1.
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