Checked my timing, whoops.....
Thread Starter
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Before going to the drag strip last night, L98Terror checked the timing on my car. It was at -4 degrees. Oook.... so we set it to 8 degrees as I have heard that was the optimal stock L98 setting a few times. Got detonation with that, so set it to 6 and all felt good. 
Any ideas what sort of power robbing that -4 might of been doing?
Any ideas what sort of power robbing that -4 might of been doing?
Thread Starter
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
8 Degrees: 14.2
6 Degrees: 13.990
6 Degrees: 13.920
He made MORE at -4??
The other thing is that last night was my first time not using street tires, so I'm still getting used to how to launch and stuff. Not seriously consistent last night.
6 Degrees: 13.990
6 Degrees: 13.920
He made MORE at -4??
The other thing is that last night was my first time not using street tires, so I'm still getting used to how to launch and stuff. Not seriously consistent last night.
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
In the olden days when I crewed for a local hot rodder (68 Firebird) we used to retard the timing when we got to the track. Rule of thumb was retarded time-better acceleration, advanced timing better top end.
We also played with the dwell, but I don't remember which way went better.
We had the track record for our class for a couple of years. I thought I'd never get back into it, till my wife made me buy this damn Vette (now that old obsession is creeping back).
We also played with the dwell, but I don't remember which way went better.
We had the track record for our class for a couple of years. I thought I'd never get back into it, till my wife made me buy this damn Vette (now that old obsession is creeping back).
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Scrop, once you get dialed in with your new setup you can change timing and find out what your particular engine "wants". And of course, though your timing curve stays the same shape, you are shifting it with base changes. I was told that I needed a chip to change my timing curve and eliminate "knock counts" but haven't addressed that issue yet.
Team Owner
Joined: Apr 2000
Posts: 27,818
Likes: 8
From: CT
I saw in OFF TOPIC you SPANKED that 'Stang! 
. What tires did you end up using? Someone should have mentioned to you NOT to launch that low(2600) or it'd bog. 'Tis ok..you'll get it. Once the cam/heads go on you'll need a sticky tire for certain.
. What tires did you end up using? Someone should have mentioned to you NOT to launch that low(2600) or it'd bog. 'Tis ok..you'll get it. Once the cam/heads go on you'll need a sticky tire for certain.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Just wondering...if youre running a aftermarket chip it has a more aggressive timing curve at WOT right?
But its based on you leaving the timing in the stock location..could advancing it make it ping then?
When I had a ADS chip(came with the car when I bought it), it would ping at WOT if the timing was set around 8 degrees..I have the stock chip(GM upgraded for the 86) back in the car and I can advance it to 9-10 now with no problems.
Anyone know for certain if a chip(like hypertech, ads, etc) can cause too much advance timing for 8 degrees?
But its based on you leaving the timing in the stock location..could advancing it make it ping then?
When I had a ADS chip(came with the car when I bought it), it would ping at WOT if the timing was set around 8 degrees..I have the stock chip(GM upgraded for the 86) back in the car and I can advance it to 9-10 now with no problems.
Anyone know for certain if a chip(like hypertech, ads, etc) can cause too much advance timing for 8 degrees?
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Originally Posted by Bill's86Coupe
Anyone know for certain if a chip(like hypertech, ads, etc) can cause too much advance timing for 8 degrees?[/color]
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Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Originally Posted by scorp508
Any ideas what sort of power robbing that -4 might of been doing?[/color]
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Originally Posted by Derf
TO Bill's86Coupe, Was there an upgrade stock chip from GM for the 86???? If so, where would one obtain it?? Thanks[/color]
When you go buy a prom, theres usually one part number for your year, engine, tranny and gear ratio.
It may not say it, but all the proms they sell now are revised or upgraded.
I have a little engine work done so I think that might be why I can advance my timing a litle more over stock then just the chip alone...just a guess, not a fact I know.