Edelbrock Heads
Thread Starter
Melting Slicks
Joined: Sep 2003
Posts: 3,050
Likes: 2
From: Orange Ct
Edelbrock Heads
I have finally completed my install of my Edelbrock heads. Thanks to the depth of knowledge on this forum, I had few problems. These heads replaced some old 520 64cc castings that are low HP passenger car units. The new heads are also 64cc and fit ok with L79 domed pistons and work out to a 10.2 CR.
I noticed was that it took longer to warm up enough to drive without the exhaust crossover (in 40 degree weather and no choke). The engine seems to wind up faster when in neutral and a short round the block run shows promise of being much quicker. The engine sounds a lot different now. So far no white smoke and oil and water are staying where they should be.
I was concerned about scratches in one of the cylinders but no oil smoke is evident. I have remember it’s a Chevy small block and not Swiss watch.
http://i2.tinypic.com/v31zd1.jpg
I noticed was that it took longer to warm up enough to drive without the exhaust crossover (in 40 degree weather and no choke). The engine seems to wind up faster when in neutral and a short round the block run shows promise of being much quicker. The engine sounds a lot different now. So far no white smoke and oil and water are staying where they should be.
I was concerned about scratches in one of the cylinders but no oil smoke is evident. I have remember it’s a Chevy small block and not Swiss watch.
http://i2.tinypic.com/v31zd1.jpg
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Great News.
I always liked the Edelbrock heads as bolt on and go performance. Heard they have been improved recently and expect good results with that c.r..
Keep an eye on your oil consumption and don't be afraid to try a oil additive like molybdenum or PTFE/Slick 50 - once.
cardo0
Keep an eye on your oil consumption and don't be afraid to try a oil additive like molybdenum or PTFE/Slick 50 - once.
cardo0
Thread Starter
Melting Slicks
Joined: Sep 2003
Posts: 3,050
Likes: 2
From: Orange Ct
So I’ve had the heads on for a few weeks and have about 100 miles on them. The only real change was the heads. Carb, intake and exhaust manifolds all the same. The old setup produced carbon black plugs from mostly easy low RPM driving. The same driving with the new heads produces light tan color plugs.
Can the higher flow of the Edelbrock heads make that much difference in the carburetor jetting? The carburetor is a Holley Street Avenger 670 CFM with the original jets.
Can the higher flow of the Edelbrock heads make that much difference in the carburetor jetting? The carburetor is a Holley Street Avenger 670 CFM with the original jets.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Sounds more like something is sealed up now that wasn't.
More likely some obscure improvement made with the new heads - vlv seals, intake, PCV hose routing, vac lines and check vlv corrected?
But a 100mi ain't alot to compare with.
So how's that thang run? Edelbrock heads worth it? I expect it to get up and run now - big improvement?
Any feedback would be helpful.
cardo0
But a 100mi ain't alot to compare with.
So how's that thang run? Edelbrock heads worth it? I expect it to get up and run now - big improvement?
Any feedback would be helpful.
cardo0
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by w1ctc
The old setup produced carbon black plugs from mostly easy low RPM driving. The same driving with the new heads produces light tan color plugs.
Can the higher flow of the Edelbrock heads make that much difference in the carburetor jetting?
Can the higher flow of the Edelbrock heads make that much difference in the carburetor jetting?
RACE ON!!!
Thread Starter
Melting Slicks
Joined: Sep 2003
Posts: 3,050
Likes: 2
From: Orange Ct
Originally Posted by CFI-EFI
No. You only have 100 miles and the plugs are already tan. Give them a chance, they'll turn black. The carburetor meters out fuel based on the amount of air that passes through the venturis. Changing the heads won't make a major difference in the A/F ratio. Whatever made it run rich before...still is. Probably a warped gasket surface or a blown power valve.
RACE ON!!!
RACE ON!!!
