Top end kit
Thread Starter
Racer
Joined: Jul 2009
Posts: 337
Likes: 7
From: South Bend IN
NCM Sinkhole Donor
Top end kit
I have been looking at this kit for my 1979 L48 but I need to know if it will require and further rebuilding of the engine or other critical parts. Your thoughts and other suggestion would be helpful! Thanks
http://www.summitracing.com/parts/EDL-2098/?rtype=10
http://www.summitracing.com/parts/EDL-2098/?rtype=10
Melting Slicks
Joined: Feb 2007
Posts: 2,136
Likes: 62
From: West Kingston RI
Have you done a leak down test on the motor or at least a compression check. No way to answer your question without far more details on present engine condition. You add this to a tired bottom end you will be doing a rebuild soon.
Melting Slicks
Joined: May 2006
Posts: 2,590
Likes: 403
From: Nashville TN
St. Jude Donor '09
A lot of the guys steer away from the kits and opt for mix and matching their own components to get the best performance for their application. I know the kits are easier, but you may want to look at building your own "kit". I would determine your budget first, then post a thread to help you pick the parts based on your setup. It would at least give you some choices.
Pro
Joined: Jun 2005
Posts: 725
Likes: 1
From: FL.
A lot of the guys steer away from the kits and opt for mix and matching their own components to get the best performance for their application. I know the kits are easier, but you may want to look at building your own "kit". I would determine your budget first, then post a thread to help you pick the parts based on your setup. It would at least give you some choices.
Instructor
Joined: Jun 2010
Posts: 199
Likes: 0
That is the edelbrock performance RPM package its not to bad i would go with the plain performer package not a RPM package as it will change the RPM curve to make the motor run and pull its might at around 4000 red line at 6500. the plain power package keeps the stock RPM's.
Also that intake is the performer RPM air gap intake its a no go under a stock L-48 hood.
Also risk of bottom end failure do to the new red line and the L-48 cast crank and 2 bolt mains.
Also you probably won't get or see that kinda HP gain as the L-48 has dished smogger low compression pistons in it. If you was doing a L-82 with flat tops in it maybe you might get that with edelbrocks so called bolt on performance.
Thats my opinion.
Also that intake is the performer RPM air gap intake its a no go under a stock L-48 hood.
Also risk of bottom end failure do to the new red line and the L-48 cast crank and 2 bolt mains.
Also you probably won't get or see that kinda HP gain as the L-48 has dished smogger low compression pistons in it. If you was doing a L-82 with flat tops in it maybe you might get that with edelbrocks so called bolt on performance.
Thats my opinion.
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
If he gets the edelbrock heads with the small chambers (64cc). That would put him about 10 to 1 compression. Go to the Edelbrock web site and check out the dyno curves. Edel. packages are know for there great low end torque and good top end without loosing driveability. Some people feel the need to get crazy and run into problems and if your a good wrench then thats OK but if you can't blow apart your carb and tune it or recurve the distributor to dial it in perfect I would go with the Edelbrock/Summit kit
Much less of a head ache.
PS as said before, you may need a different aircleaner or manafold...
Much less of a head ache.PS as said before, you may need a different aircleaner or manafold...
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
OE L48 has dished pistons ... w/ 64cc, OE L48'll make about 9:1 at best (not 10:1). RPM cam way too much for 9:1 street car. As others say ... don't get a TE kit ... better to get some education, then mix n match.
a cheap but good homemade "kit" for L48 is a pair of L98 aka zz4 heads (58cc) and a summit K1103 or K1104 cam &lifter kit along with YOUR intake manifold.
a cheap but good homemade "kit" for L48 is a pair of L98 aka zz4 heads (58cc) and a summit K1103 or K1104 cam &lifter kit along with YOUR intake manifold.
