Ive had a stock long block LS3 in my car for a while with a good tune on my Holley efi for a while. It has aftermarket cam, springs, pushrods, but all stock internals and heads.
The last combo on it was a 2650 blower and 94mm turbo blowing through that. It ran great coming from a turbo only setup. AE never had to be fiddled with.
Sooooooo I spun a rod bearing in that because of a weird intake manifold explosion, long story.
I put together a 402 in an LS2 block, still 58 wheel and 4x. This has TFS 255 LS3 heads now, but otherwise everything else is the same as the LS3, very comparable cam,
same blower and turbo, same sensors, etc.
I used the LS3 tune with it and just added 10% fuel everywhere and took 3* timing out everywhere since kind of starting over timing wise.
It has the worst tip in ever, it goes a little rich, then goes off the chart lean. I kept giving it 10% more in the AE vs TPS rate table, but it seems to make it worse. Any ideas?
I would normally trouble shoot it alot more myself but Ive got 2 days until Tx Mile and we just got 2" of ice outside, so Im going to wind up having to drive down there and
debug it from there.
Thanks for any ideas!
Frank
The last combo on it was a 2650 blower and 94mm turbo blowing through that. It ran great coming from a turbo only setup. AE never had to be fiddled with.
Sooooooo I spun a rod bearing in that because of a weird intake manifold explosion, long story.
I put together a 402 in an LS2 block, still 58 wheel and 4x. This has TFS 255 LS3 heads now, but otherwise everything else is the same as the LS3, very comparable cam,
same blower and turbo, same sensors, etc.
I used the LS3 tune with it and just added 10% fuel everywhere and took 3* timing out everywhere since kind of starting over timing wise.
It has the worst tip in ever, it goes a little rich, then goes off the chart lean. I kept giving it 10% more in the AE vs TPS rate table, but it seems to make it worse. Any ideas?
I would normally trouble shoot it alot more myself but Ive got 2 days until Tx Mile and we just got 2" of ice outside, so Im going to wind up having to drive down there and
debug it from there.
Thanks for any ideas!
Frank
Worth a shot at least. And when I say breaking up, I mean like a misfire, which may or may not pop in the exhaust.
