timing on a SC car need help ASAP!!!

**Zboner** · 12-11-2006, 12:34 PM

ok what kind of timing shoudl i be running at in this car?? its stock engine with lifters, springs, and rockers, LT1 car, running at about 7PSI, there is a tunning adjuster and my dumb ass friend started messing with it last night and dont remember where it was set at. it was back firing all over the place and only ran smooth at high RMP's and hated 5th and 6th gear

**BlackLT1Z28** · 12-11-2006, 05:00 PM

Are you running stock internals too? And is it intercooled? 7 psi on stock internals it bad, but if its intercooled, then it should be ok.
As far as timing, I have no f-ing idea. I would think you would want to retard the timing, kind of the same principle as running juice.

**Zboner** · 12-11-2006, 06:39 PM

no intercooler, im going to get one after Christmas along with new lifters and springs

**Packy** · 12-11-2006, 07:49 PM

Typically around 15-20* but with no intercooler I would keep it on the lower side. Was it backfiring or detonating? Be careful otherwise you might be looking for a new engine.

**Zboner** · 12-11-2006, 08:24 PM

yea it was back firing a little after it ran for a while, im going to let me friend tune it for me so i dont have to mess with it

**BlackLT1Z28** · 12-12-2006, 07:19 AM

Be careful, the stock motor can only take 5-6psi, 7-8psi intercooled. Since you're not running an intercooler yet, keep the boost to a minimum.

**Zboner** · 12-12-2006, 08:05 AM

it runs pretty good though it hits like 6 in first and top of second and 3rd 7 or 8

**Packy** · 12-12-2006, 12:32 PM

Originally Posted by Zboner

it runs pretty good though it hits like 6 in first and top of second and 3rd 7 or 8

Is that the timing? If so that is hella low. I guess he was compensating for the extra boost with super low timing. You need an intercooler asap!

**FasstChevys** · 12-29-2006, 11:30 AM

Originally Posted by Packy

Is that the timing? If so that is hella low. I guess he was compensating for the extra boost with super low timing. You need an intercooler asap!

I'm guessing he's talking about the boost level?

**Packy** · 12-30-2006, 07:45 PM

Yeah maybe...

**BOSSONNOS** · 01-03-2007, 10:06 PM

I run 8-10 psi non intercooled on standard motors with 15 deg total timing and no detonation. This will depend on how hot it gets in your area though.

**Zboner** · 01-03-2007, 10:32 PM

but your also running an LS1 or LS2 this is an LT1 car

**BOSSONNOS** · 01-03-2007, 10:51 PM

Sorry, missed that bit, haven't had any experience with LT1's over here.

**Zboner** · 01-03-2007, 10:52 PM

i might have my other car sold, so if thats the case im pulling the engine and going to a 396 and forged internals so i can run my 15lbs of boost

**Packy** · 01-04-2007, 02:51 AM

Originally Posted by Zboner

i might have my other car sold, so if thats the case im pulling the engine and going to a 396 and forged internals so i can run my 15lbs of boost

WHat S/C head unit does that car have in it? A 396 might breathe too much for the type of head unit you have. If it is an ATI make sure it is at least a D1SC and if it is Vortech I would go with a T-trim for that size of motor.