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Topic: Peformance Problem Due To Timing

in Forum: C3 General Discussion


Peformance Problem Due To Timing

Posted: 1/9/06 2:40pm Message 1 of 8
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Columbia, TN - USA
Joined: 10/5/2002
Posts: 92
Vette(s): (1) 1971 Roadster, (1) 1971 Coupe (2) 1977 Coupes, (1) 1972 Coupe, (1) 1998 Coupe, (1) 1997 Coupe
I posted earlier that I thought my passing gear wasn't kicking in, however, after verifying that it was kicking in and doing some further investigation, I discovered that the timing was waaaay off.  I had to buy a timing light since I had long since sold mine at a yard sale and am in the process of tweeking the timing. 
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Peformance Problem Due To Timing

Posted: 1/9/06 2:51pm Message 2 of 8
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Virginia City, NV - USA
Joined: 1/19/2005
Posts: 314
Vette(s): 1979 Coupe, white in color

 

  Chris, I've had better luck doin it Ben's way, with a vacuum gauge. Then checking with a lite. Just MHO.

Dave




Peformance Problem Due To Timing

Posted: 1/9/06 3:04pm Message 3 of 8
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Columbia, TN - USA
Joined: 10/5/2002
Posts: 92
Vette(s): (1) 1971 Roadster, (1) 1971 Coupe (2) 1977 Coupes, (1) 1972 Coupe, (1) 1998 Coupe, (1) 1997 Coupe
I'm not familiar with that method.  Can you direct me to a link to the post or other source of information?


Peformance Problem Due To Timing

Posted: 1/9/06 7:49pm Message 4 of 8
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Not sure if this is the same as Ben's way, but...
connect a vac. gauge to the intake, say, where the fitting is behind the carb. Then, adjust the dist, until you get the highest reading on the gauge. Then check with the light.


Joel Adams
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Peformance Problem Due To Timing

Posted: 1/9/06 7:51pm Message 5 of 8
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HOWELL, NJ - USA
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Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
One of the best ways I've found


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Peformance Problem Due To Timing

Posted: 1/9/06 8:10pm Message 6 of 8
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Ok, I went & looked:

Ben's method/post

and.....Ben's mathmatics!

                                         


Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Peformance Problem Due To Timing

Posted: 1/9/06 11:38pm Message 7 of 8
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Columbia, TN - USA
Joined: 10/5/2002
Posts: 92
Vette(s): (1) 1971 Roadster, (1) 1971 Coupe (2) 1977 Coupes, (1) 1972 Coupe, (1) 1998 Coupe, (1) 1997 Coupe
Thanks everyone!  I found Ben's posts and Adam's Apple's post makes it even easier.  Hmmmm, now to dig out my vacuum gauge.  We moved about 15 months ago and many things, including my vacuum gauge, are still packed up as we are renting at present. 

I reset the timing yesterday took her out on the road and tested the acceleration.  Everything went fine until it backfired through the carb on one pedal to the floor evolution.  Must still have a bug in there somewhere.  I'm trying to re-educate myself as I haven't had to tune up a car with a carburetor in many years. 

BTW, Ben's mathematics made my brain sweat! 
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Peformance Problem Due To Timing

Posted: 1/10/06 11:40am Message 8 of 8
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ORLANDO, FL - USA
Joined: 12/11/2002
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Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
I missed Ben's post the first time around but it makes allot of sense. I am going to try it hopefully this weekend. I was planning on doing some more fine tuning/checking since I changed the springs. If it doesn't work out I can always go back to the way it was.


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

in Forum: C3 General Discussion


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