Pinging wit 16 degre timing and 11.5 A/F. Why???
11-04-2006, 08:02 AM
#31
3.0 BAR
Join Date: Apr 2006
Posts: 2,057
Re: Pinging wit 16 degre timing and 11.5 A/F. Why???
Originally Posted by L_S_i
I also live in europe and i´ve never had an issue with 95 oct in turbo or na cars, my timing is like -2 over stock, maybe you just should be getting gas over here in PT. 
11-09-2006, 12:22 PM
#35
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Join Date: Feb 2003
Posts: 0
Re: Pinging wit 16 degre timing and 11.5 A/F. Why???
Stock tach keeps up fine on 10 second drag cars. Your buddy has a pissy G101 connection, or the synthesized tach output from the igniter is flaky, which has nothing to do with it's ability to control coil dwell time. Welcome to five minutes worth of reading your service literature. :1
A cheap shift light in a big power car I can understand. A stupid ****** $$$ tach screwed to the dash in an ignorant manner I can't. Most OEM tachs aren't calibrated perfectly, but it took me one pull on Trav-***' car to deduce where tach needle on stock LS cluster lay at 9700 rpms, and everyone who drove the car (me, Caveman, Goforth, Trav-***) needed about three pulls to get a feel for it. Things happen pretty quickly at 17 psi on a T67, so I expect people who experience subjective gains from bling-badass ricer tachs to fail utterly at shifting a car like that correctly regardless of the tach used.
A cheap shift light in a big power car I can understand. A stupid ****** $$$ tach screwed to the dash in an ignorant manner I can't. Most OEM tachs aren't calibrated perfectly, but it took me one pull on Trav-***' car to deduce where tach needle on stock LS cluster lay at 9700 rpms, and everyone who drove the car (me, Caveman, Goforth, Trav-***) needed about three pulls to get a feel for it. Things happen pretty quickly at 17 psi on a T67, so I expect people who experience subjective gains from bling-badass ricer tachs to fail utterly at shifting a car like that correctly regardless of the tach used.
11-09-2006, 12:34 PM
#36
0.0 BAR
Join Date: Nov 2006
Posts: 9
Re: Pinging wit 16 degre timing and 11.5 A/F. Why???
Originally Posted by Joseph Davis
Things happen pretty quickly at 17 psi on a T67, so I expect people who experience subjective gains from bling-badass ricer tachs to fail utterly at shifting a car like that correctly regardless of the tach used.
11-19-2006, 10:27 PM
#37
1.0 BAR
Join Date: Jan 2004
Posts: 255
Re: Pinging wit 16 degre timing and 11.5 A/F. Why???
I don't consider 16 degrees of timing to be "too much" on that engine. On decent fuel I've tuned dozens with as much as 18-20 degrees at 12 PSI and they've all lasted years. Putting the LM1 in your tailpipe isn't the correct way to measure AFR. You need to install it in the exhaust stream before any cats and install it properly. Also 11.5-12.5 is a big jump. I'd say 12.5 is too lean, especially at the higher RPMs. I'd aim for 11.5 and then taper it down to 11.2 or richer at the top - that's where you need to worry about keeping things cooler.
-Michael
-Michael
11-20-2006, 01:40 AM
#38
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Thread Starter
Join Date: Oct 2005
Posts: 119
Re: Pinging wit 16 degre timing and 11.5 A/F. Why???
Originally Posted by hackish
I don't consider 16 degrees of timing to be "too much" on that engine. On decent fuel I've tuned dozens with as much as 18-20 degrees at 12 PSI and they've all lasted years. Putting the LM1 in your tailpipe isn't the correct way to measure AFR. You need to install it in the exhaust stream before any cats and install it properly. Also 11.5-12.5 is a big jump. I'd say 12.5 is too lean, especially at the higher RPMs. I'd aim for 11.5 and then taper it down to 11.2 or richer at the top - that's where you need to worry about keeping things cooler.
-Michael
-Michael
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