Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
1977 454 Quadrajet Secendary issue, pop back fire rough running.
Cliff Ruggles:
Here's my pic for the camshaft:
https://www.summitracing.com/parts/sum-1301/make/chevrolet
USA made and works well in the later "low" compression 454's. Second choice would be the GM Marine big block cam which is basically a duplicate of the 396/325hp cam. Very close specs to the Summit cam above on a 115LSA.....
https://www.summitracing.com/parts/mel-22216
Either of these cams have gentle lobes and easy on the lifters plus don't need a butt-load of spring pressure......
Jeff K:
Thank you Cliff....
Cliff Ruggles:
You are most welcome.
You can also take the path that most others take with these things. Order a Comp XE or Tump-Ya-Mautha cam, install their cheap Chinese lifters on it, "battleship" valve springs to keep things in check, and heavy locks/retainers.
Of course you'll knock half the lobes off of it in six months but it sure will sound good when you idle thru the next Dairy Queen Car Cruise!........LOL.....
Jeff K:
I can't believe people are still drinking the Cool Aid!! There's power in advertising.
I miss those videos of that German kid frying those 14" Bias Ply snow tires off his Firebird because he had an XE cam..
Jeff K:
I'm having a lot of fun being retired and playing around with this 69 el Camino..
I'm thinking about the Melling 22216 Marine cam. I was going to buy Crower hyd lifters with the cool face or try to find some 60s-70s vintage NOS hyd lifters.
Rhoads also sells there lifters before modification. I'm thinking they inspect them making sure they have a good batch before modifying them with there famous bleed channel..
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version