Spark plug gapping?
Drifting
Joined: Mar 2004
Posts: 1,522
Likes: 0
First, why do you want to run a smaller gap? Is the car not running properly? Or do you just feel like shortening the gap? Unless your car is modded that requires the gap to be altered from its factory setting, leave it at the factory's recommendation. Those gap numbers are there for a reason.
AKS Racing, have you looked into getting a multi coil system like the LTCC or Delteq, or something with more juice? That might solve your problems.
I used .05 with no problems on my LT4. Go with what the factory recommends unless you have a specific reason not to here.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
But anybody who quotes a Chiltons manual
has no business giving tech advice.GM spec for an LT1 is .05. Which is a really bad choice if you use the stock plugs, since when they lose their pucks they open up to around .075
On a stock LT1 most people seem to run either at stock (0.05) or around .035-.04. With an LTCC a lot of people run .06
For anybody that wants a discussion on spark plug gap that is based on something other than looks or "because GM said so", well, as you can see this is not the right forum. There are plenty of technical threads on the subject on other SBC & LT1 forums.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
I wonder how an MSD 7 or 8 is relative to the 6AL. Do any of these provide more voltage that might help when really cranking the cylinder pressures?
Thanks for the intelligent reply.
Aaron
Drifting
Joined: Mar 2004
Posts: 1,522
Likes: 0
I agree with your comments on the Delteq or coil on plug possibly supplying more juice. I think it may be time to look at a crank trigger with the COP alternative. I wonder if there is a simple interface harness that works with the FAST system. This really wasn't an issue until I started regularly pushing over 15 psi into the chambers.
I wonder how an MSD 7 or 8 is relative to the 6AL. Do any of these provide more voltage that might help when really cranking the cylinder pressures?
Thanks for the intelligent reply.
Aaron
I wonder how an MSD 7 or 8 is relative to the 6AL. Do any of these provide more voltage that might help when really cranking the cylinder pressures?
Thanks for the intelligent reply.
Aaron
You might be able to run FAST Electronic Dist. along with your FAST. I bet the have had some requests for a multi coil system on their fast hardware, so I wouldn't be surprised if they have something to make it happen.
You might be able to wire MSD LS1/6 ignition controller up and run that along with your FAST. It seems like you would have to control fuel in one, and spark in another, but they might have something to work for both.
