You got it backwards, a really efficient combustion chamber will require less ignition lead (or advance). This is the reason we see boosted LS/LT engines with 11.3:1 successfully. Do that with an old SBC/Big Chevy and your tuning window will either be so small it'll be tough to tune or you won't find it until you put octane (or alcohol based) fuel in it. Good job otherwise and I think that's basically what you were saying, you just quoted it backwards in the beginning of the video..
i have a 5.3 with a stage 2 sloppy mechanics cam and im still trying to learn how to set timing in it any help on how my number should look? running regular pump gas maybe later down the road i will spray nitrous
Each engine is different and randomly comparing timing tables to different combos can get you in trouble. In your example an LSA engine is 9.1 to 1 static compression. Factory boost level is low on them as well. The particular combo in the demonstration video is a 10.6 to 1 static compression ratio over 15 psi of boost. Lots of factors really, but a 9.1 to 1 engine on 10 psi is normally going to be able to run more spark lead than a 10.6 to 1 engine on 15+ psi of boost with both using the same fuel type. Of course lots of other factors and I'm just speaking in general terms. Hopefully I made sense.
@@Motown952Agreed! I think it's odd that it's cutoff so that we can't see the other axis labels. If it has an lsa supercharger, the timing is low. If you put an LSA supercharger on an engine that only allows you to run an ignition lead that's considerably lower than idle timing on a lot of engines, you need to put good fuel in it or knock some compression out of it but your camshaft is way wrong if you're anywhere close to detonation!
You got it backwards, a really efficient combustion chamber will require less ignition lead (or advance). This is the reason we see boosted LS/LT engines with 11.3:1 successfully. Do that with an old SBC/Big Chevy and your tuning window will either be so small it'll be tough to tune or you won't find it until you put octane (or alcohol based) fuel in it.
Good job otherwise and I think that's basically what you were saying, you just quoted it backwards in the beginning of the video..
LOL.
i have a 5.3 with a stage 2 sloppy mechanics cam and im still trying to learn how to set timing in it any help on how my number should look? running regular pump gas maybe later down the road i will spray nitrous
Your numbers look low. I’d check your base timing. LSA’s run at least 19degrees.
Each engine is different and randomly comparing timing tables to different combos can get you in trouble. In your example an LSA engine is 9.1 to 1 static compression. Factory boost level is low on them as well. The particular combo in the demonstration video is a 10.6 to 1 static compression ratio over 15 psi of boost. Lots of factors really, but a 9.1 to 1 engine on 10 psi is normally going to be able to run more spark lead than a 10.6 to 1 engine on 15+ psi of boost with both using the same fuel type. Of course lots of other factors and I'm just speaking in general terms. Hopefully I made sense.
@@lsxtuner6126 15psi at 10.6 comp makes a lot more sense.
@@Motown952Agreed! I think it's odd that it's cutoff so that we can't see the other axis labels. If it has an lsa supercharger, the timing is low. If you put an LSA supercharger on an engine that only allows you to run an ignition lead that's considerably lower than idle timing on a lot of engines, you need to put good fuel in it or knock some compression out of it but your camshaft is way wrong if you're anywhere close to detonation!