S.O.S PERFORMANCE GURUS
Thread Starter
Racer
Joined: Jul 2001
Posts: 483
Likes: 3
From: d.d.o quebec
S.O.S PERFORMANCE GURUS
JUST GOT BACK FROM PICKING UP MY 79 L-82 FROM MY MECANIC. HE CHANGED THE TORQUE CONVERTOR FROM STOCK TO A 2000-2200 STALL AND AT THE SAME TIME I HAD HEDMAN HEADERS 1 5/8 PRIMARIES INSTALLED WITH AN H-PIPE THROUGH 2 1/2 INCH DUALS. FIRST THE SOUND IS ALOT QUIETER BUT THAT IS NOT THE PROMLEM MY MALLORY IGNITION BOX FAILED I RETURNED TO THE STOCK (IN PERFECT SHAPE) IGNITION SET UP AND WENT OUT TO DO SOME TESTING WITH MY G-TECH. I LOST OVER 1 SEC. IN TIMES BEFORE THE CAR RAN 5.22 0-60 AND 14.02 AT 1/4 MILE NOW 6.59 AND 15.39 WHAT THE HELL?? IS THE CARB TOO LEAN. :confused:
Safety Car
Joined: Jun 2001
Posts: 4,004
Likes: 2
From: Severna Park Md
Re: S.O.S PERFORMANCE GURUS (silver79)
Thats a bummer. The exhaust and converter mods should have defenatly helped the performance. I would say that since the ignition and distributor was changed that that may have had a negitive effect. Not that the original ignition is bad or anything, but by changing it, you now may have different timing settings, advance curve, total timing ect...those things can definatly effect performance in either a positive or negitive way depending on how they're set up. Do you know what your timing setting are now...IE initial, and total in by what rpm?
Drifting
Joined: Sep 2000
Posts: 1,355
Likes: 0
From: Germantown Maryland
Re: S.O.S PERFORMANCE GURUS (silver79)
Most probably leaned it out some but not enough to make that much difference.. When they did the headers , what did they remove. Look for the obvious disconnected things, vacuum lines, also check the timing... What do the plugs look like?
Safety Car
Joined: Jun 2001
Posts: 4,004
Likes: 2
From: Severna Park Md
Re: S.O.S PERFORMANCE GURUS (Clink69)
Most probably leaned it out some but not enough to make that much difference.. When they did the headers , what did they remove. Look for the obvious disconnected things, vacuum lines, also check the timing... What do the plugs look like?
Team Owner
Joined: May 2001
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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
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Re: S.O.S PERFORMANCE GURUS (Jvette73)
Yep - check the plugs, wires, and vacuum.
If you went to dual exhaust and headers you must increase the amount of fuel going in.
More air moving out, means more air moving in. Unless you give more fuel, you will be running lean.
If you have Holley, plan on jumping up 2 jet sizes and makeing another run. Keep moving up 2 jet sizes and makeing run until you don't get any more performance, and then go back 2.
If you went to dual exhaust and headers you must increase the amount of fuel going in.
More air moving out, means more air moving in. Unless you give more fuel, you will be running lean.
If you have Holley, plan on jumping up 2 jet sizes and makeing another run. Keep moving up 2 jet sizes and makeing run until you don't get any more performance, and then go back 2.
Thread Starter
Racer
Joined: Jul 2001
Posts: 483
Likes: 3
From: d.d.o quebec
Re: S.O.S PERFORMANCE GURUS (Clink69)
I just looked at the plugs the first one one the driver side closest to the fire wall was abit burnded Itaped it up I might change them but before i will check the timming
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Re: S.O.S PERFORMANCE GURUS (silver79)
for rejetting your Qjet, definitely use Lars' tuning papers. It tool .6 off my 1/4 mile time and I'm not done.
Turning those screws on a Qjet only affects idle mixture.
Turning those screws on a Qjet only affects idle mixture.
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