im one of those kind of guys who likes information. I’ve done some searching and I can find four cylinder threads on timing but no ls specific threads. I did read the boost and sbe thread and some but very few people listed their timing. I’m curious to know what you guys are running for boost pressure and timing under boost. If you know your iat’s and and afr’s that would be cool to list too. I’m interested in what you guys are running.

im definitely not meaning to repeat what we have, but doing a search I came up fairly empty handed except when I started sifting through threads. I did find some info but it was tid bits added into threads created for other reasons. My reason was I hoped that we could talk about just thinking and boost. And I forgot to mention the fuel being ran. I personally am mainly interested in pump gas because we don’t have much access to e85 just yet. So forgive me if there is a thread like this that I couldn’t find

I’m more specific than just copying a whole area with the same timing number. At higher rpm I’m running 5 degrees more timing than I am at say 4000 rpm in boost. For a street car in some very low rpm in high gear I have way less timing.

so say I have 7psi then you’d have it at 21? Hmmmm. I was told my 18 was too high for pump gas and 7psi. I’m not doubting what you say by any means. I just find it interesting. My car does seem to run better at 18 degrees too. I haven’t done a lot yet to see if it’s pulling timing. Being lazy right now because it’s so hot Outside i don’t even want to drive it.

understandable. I’m just trying to rough it in for now. I’m actually so burnt out from building the turbo setup that I haven’t felt like doing much tuning. Just wanted to get some experienced guys answers before I delved back into it. Plus I’m sure I’m not the only noob this info would help!

The problem is there isn’t a specific number to use and another persons setup could be completely different. Start conservative and tune at the track or on a dyno. If adding timing adds mph or dyno numbers without kr verified by reading plugs than keep going. If adding timing results in kr which is verified by reading plugs back it off. If adding timing doesn’t add mph or dyno numbers stop even without seeing kr because adding timing without seeing a power increase is pointless.

My peak is only 17 on E70 stock ls1 compression and 10 psi but I will not add any more until I can get to the track to see if I gain any mph from it. Currently zero kr and timing mark just past the bend. Afr between 11.0 and 11.5 on the gas scale.

you have a 9 sec nova don’t you? If so I think my buddy that’s a member here was telling me about your car a while back when I was building my turbo setup. He was impressed that you (if your the and guy) had only a 218/218 cam.

My cam cam is a 227/234 non turbo cam. Some of you know that, some don’t. Maybe that’s why I’m getting away with 18 degrees like I WAS lol. Because it’s backed down a couple degrees now because some of you guys in another thread scared me lol.

my bad. I just knew it was fast. Faster than my car lol.

I have always started at -1 degree per pound of boost and found that to be extremely safe when reading plugs....

I just set it at 16 degrees for the 6 psi I’m at right now. Probably keep it at that for 8psi. It’s been doing good like that.