81 Next mod please **Ideas**
Thread Starter
Instructor
Joined: Feb 2010
Posts: 131
Likes: 1
From: Escondido CA
81 Next mod please **Ideas**
Headers, intake, cam done what next...
My engine is solid and after I get her smogged Im ripping all that junk off for emissions and putting it on the shelf for next time. I didnt go with a huge cam for smog reasons but I should be able to get into the high 300hp just fine.
What should I do next? Carb? Blower? Turbo? Gears? MSD?
Mods Done:
Weiand Intake Manifold
Headman Headers
Performer Rocker Arms
Dynomax Mufflers
Orig. Heads Rebuilt
Summit Racing Cam SUM-K1102
Cam and Lifters, Hydraulic Flat Tappet
Duration 262/272
Lift .420/.442
My engine is solid and after I get her smogged Im ripping all that junk off for emissions and putting it on the shelf for next time. I didnt go with a huge cam for smog reasons but I should be able to get into the high 300hp just fine.
What should I do next? Carb? Blower? Turbo? Gears? MSD?
Mods Done:
Weiand Intake Manifold
Headman Headers
Performer Rocker Arms
Dynomax Mufflers
Orig. Heads Rebuilt
Summit Racing Cam SUM-K1102
Cam and Lifters, Hydraulic Flat Tappet
Duration 262/272
Lift .420/.442
Race Director
Joined: Jan 2003
Posts: 15,175
Likes: 86
From: State of Confusion
a member of this Forum, who'd added vortec heads, cam, intake & carb, headers, etc., to his OEM 2.87:1-geared 1980 L-48, once drove my de-Cross-Fire'd '82 (original 26,000-mile long block, 650 Holley, aluminum intake), which I had swapped to 3.73s long ago:
I'd never driven his car (I'm in Floriduh, while he is still in Taxylvania), and afterwards, he said my car would smoke his in the 1/4-mile easily
I had tried to convince him that a gear change would greatly improve the performance of his car, but he recently sold the car:
we attribute my car's quicker acceleration with less HP simply to having deeper gears, and getting what-little power I have to the pavement more efficiently via same
I'd never driven his car (I'm in Floriduh, while he is still in Taxylvania), and afterwards, he said my car would smoke his in the 1/4-mile easily
I had tried to convince him that a gear change would greatly improve the performance of his car, but he recently sold the car:
we attribute my car's quicker acceleration with less HP simply to having deeper gears, and getting what-little power I have to the pavement more efficiently via same
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
a member of this Forum, who'd added vortec heads, cam, intake & carb, headers, etc., to his OEM 2.87:1-geared 1980 L-48, once drove my de-Cross-Fire'd '82 (original 26,000-mile long block, 650 Holley, aluminum intake), which I had swapped to 3.73s long ago:
I'd never driven his car (I'm in Floriduh, while he is still in Taxylvania), and afterwards, he said my car would smoke his in the 1/4-mile easily
I had tried to convince him that a gear change would greatly improve the performance of his car, but he recently sold the car:
we attribute my car's quicker acceleration with less HP simply to having deeper gears, and getting what-little power I have to the pavement more efficiently via same
I'd never driven his car (I'm in Floriduh, while he is still in Taxylvania), and afterwards, he said my car would smoke his in the 1/4-mile easily
I had tried to convince him that a gear change would greatly improve the performance of his car, but he recently sold the car:
we attribute my car's quicker acceleration with less HP simply to having deeper gears, and getting what-little power I have to the pavement more efficiently via same
My slightly modified 82 crossfire crushes all my other cars off the line because of the gearing on the 700R4.
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Thread Starter
Instructor
Joined: Feb 2010
Posts: 131
Likes: 1
From: Escondido CA
This says 82 and above but will it work with my tranny still? Im thinking of 373 gears and a posi lock. What will fit my 81?
http://cgi.ebay.com/ebaymotors/700r4...Q5fAccessories
And
http://cgi.ebay.com/ebaymotors/GM-14...item2557bffd19
http://cgi.ebay.com/ebaymotors/700r4...Q5fAccessories
And
http://cgi.ebay.com/ebaymotors/GM-14...item2557bffd19
Thread Starter
Instructor
Joined: Feb 2010
Posts: 131
Likes: 1
From: Escondido CA
Yeah im driving it right now. Off the line is slow as heck but if I punch in when in 2nd or 3rd it gets up and goes. Im sure a better gear ration will give me that tire squeeling I need to HEAR... ; ) So is there a big difference between 3:54 and 3:73 I mean is it noticable?
Maybe I can go to the 3:54 and keep some sort of gass milage.. How is yours?
Maybe I can go to the 3:54 and keep some sort of gass milage.. How is yours?
Instructor
Joined: Jan 2006
Posts: 228
Likes: 1
From: Warwick New York
How may miles do you have on that bad blue boy, it might be time for a rearend rebuild and then you can go with graphite clutches. I have 3.73s with graphite clutches but everything else has been changed so don't go by me. but I can light up both of my 295-35s (that almost 2ft of tire width)
Last edited by captl27; Feb 26, 2010 at 04:38 PM.
Abby Normal
Joined: Dec 2001
Posts: 53,346
Likes: 92
From: Press "2" for English
Sorry, Leatherneck, but ain't no way you're getting a stock '81 long block into the high 300hp range. It just ain't happening. Now, you can feel like you have 300hp with the gear change, but on the motor, there's just not enough there.
