L48 Performance Upgrade
08-31-2005, 04:43 PM
#1
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L48 Performance Upgrade
Am contemplating a performance upgrade for my 73 L48. Would like to get about 300-350 horses and better torque. Any suggestions would be appreciated. Got about 3K to spend. Told a Comp Cams Hi-Energy 268 cam and appropriate lifters, Edelbrock Performer RPM/EPS intake manifold, matching cylnder heads from Edelbrock and long tube exhaust headers with 2 and 1/4 pipes and Flowmaster 40's, mufflers will do it. Also an MSD 6A ignition box and MSD distibutor. This all be done within budget with a little room to spare for cost overrun. Would like the car to turn around 14.0- 14.2 1/4 mile at about 100 MPH. Car has AC. Any comments or suggestions. Thanx in advance
08-31-2005, 05:51 PM
#2
Well my '79 L48 regularly makes trips down the quarter under 14 seconds. I drive it to the track, bolt on my slicks and last Sunday my 1st run was 13.92 at 97 mph.
Thats done with stock heads too. I only have an Edelbrock Performer cam, quadrajet carb (reworked by Lars), Performer Intake, I've added an MSD 6AL and I recurved the distributor as well. It has Dynamax Ceramic coated headers.
I've also studied some of Lars papers on performance tuning and that stuff really works. This is a sweet and consistant package and I know I did not spend $3000 doing it.
However, I am currently building a BBC for it and hope to end up with 460 horse on pump gas. See the need for speed never really ends. Faster breeds faster and faster.
Thats done with stock heads too. I only have an Edelbrock Performer cam, quadrajet carb (reworked by Lars), Performer Intake, I've added an MSD 6AL and I recurved the distributor as well. It has Dynamax Ceramic coated headers.
I've also studied some of Lars papers on performance tuning and that stuff really works. This is a sweet and consistant package and I know I did not spend $3000 doing it.
However, I am currently building a BBC for it and hope to end up with 460 horse on pump gas. See the need for speed never really ends. Faster breeds faster and faster.
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SGMP (07-06-2018)
08-31-2005, 06:07 PM
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I just had that cam installed. Along with the dart/summit heads, edlebrock performer intake & carb, headers into 2.5" true duals with magnaflow mufflers. Its also got a 2500 stall tc. The car runs awesome.I wanted an xe series cam or the voodoo cam.The mechanic that ported the heads said the he268h would be best. I`m glad I listened to him. Good luck with your build.
thats what i plan to do to my 76, vortec heads, hotter cam, and matching intake, should be fairly simple to do.
09-01-2005, 10:36 AM
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Originally Posted by Richiebaseball7
Am contemplating a performance upgrade for my 73 L48. Would like to get about 300-350 horses and better torque. Any suggestions would be appreciated. Got about 3K to spend. Told a Comp Cams Hi-Energy 268 cam and appropriate lifters, Edelbrock Performer RPM/EPS intake manifold, matching cylnder heads from Edelbrock and long tube exhaust headers with 2 and 1/4 pipes and Flowmaster 40's, mufflers will do it. Also an MSD 6A ignition box and MSD distibutor. This all be done within budget with a little room to spare for cost overrun. Would like the car to turn around 14.0- 14.2 1/4 mile at about 100 MPH. Car has AC. Any comments or suggestions. Thanx in advance
09-01-2005, 10:52 AM
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Originally Posted by steves_77vette
I'm not out to dis on Comp Cams but you might want to do a search in this forum on them and the cam before committing. Trust me, you'll come up with a LOT of posts about that cam.
09-02-2005, 08:49 AM
#10
