1977 454 Quadrajet Secendary issue, pop back fire rough running.

[Jeff K]

Here's what I'm ready to buy. I want to use the stock 781 head valve spings..

Cam- Melling 22216
https://www.summitracing.com/parts/mel-22216
 
Lifters- Chevrolet Hard Faced #12371044   
https://www.summitracing.com/parts/nal-12371044#overview

Summit Standard Timing Set W/gears
https://www.summitracing.com/parts/sum-g6511

Fel Pro Gasket set.
https://www.summitracing.com/parts/fel-260-1009

Isky Rev Lube.
 https://www.summitracing.com/parts/isk-rl-1


Thoughts?

[Cliff Ruggles]

Looks good as long as the lifters are really hard faced and USA production....

[Jeff K]

Thank you so much Cliff!!

By the way, the old 462 is living by you in Lancaster, Ohio.. It has to have close to 100K by now! I almost flipped when the guy who bought it said, " I'm looking for a 60s street rod to take the kids to Dairy Queen in. I knew he was the right guy after hearing that LOL!! ".

[Jeff K]

Hey guys will I need new lifters with either the Melling 22216 or the Summit 1301?

I'd like to keep the stock springs and just change lifters and cam.

My engine is a 1978 454 with 336781 heads all stock.

The Melling 22216 cam's specs are;

Duration @50 exhaust 218

Duration @50 intake 214

Lift W/stock 1.70 rocker, exhaust .496

Lift W/stock 1.70 rocker, intake .476

The Summit 1301

Duration @50, exhaust 218
Duration @50, intake 214

Thank you!!!


Lift Exhaust .501
Lift Intake   .502

[Jeff K]

Sorry for the error, I meant will I need new springs with either cam. I really like the Melling 22216!! I got a lot of good feedback on both. Everybody says as long as the lift is at or under .500 Im good.

[von]

That Melling cam is a pretty close replica of the GM Chevy LS-5 454 and L34 396 cam. Duration at .050 and LSA are the same. Lift on the GM cam was .461 int and .480 exh.

[Jeff K]

Thank you Von.

[Jeff K]

Well I got a cam and lifters from Melling. There a small chip out of the cams mid bearing lobe. I'm not sure if it matters. I'm not using the lifters. They say made in Mexico on the box, kind of strange for Made in USA parts..

I have a guy on the Chevy forum that makes and sells cams and will sell me a set of USA made lifters. The cam doesn't say Mexico just the lifters.

Thanks for all your help guys.
This is a shame I got to come over here and bother you guys with this cam stuff. But I've bought a few things from Cliff and your the only guys I can trust..

[Jeff K]

The cam.

[Jeff K]

I wanted to clean this all up.
 I took the cam and Mexico lifters to my motorcycle machinest and he looked it all over and said both are fine and the machine work on the cam is actually pretty good. 
I still sent it all back and bought the more expensive 22216 Melling cam that was suggested in the first place and $200 lifters from GM. It should be here today and I'm all ready to go..

By the way Melling specs there lift at 1.76 rocker ratio but the 454 Chevy uses 1.70. So I got to drop the 22216 cams lift spec down from;
Intake .476" to .479"
Exhaust ..496" to .479"

Next will be the Quadrajet rebuild and I finally get to spend some money with you guys LOL..

Thank!

[Cliff Ruggles]

Jeff, I'd be glad to take your money but rest assured I'm happier to know that you are buying the best parts in this industry and will get good results from using them!.....

[Jeff K]

 Cliff, the Melling 22216 cam is fantastic in my 8:1 454!

It has a slight lope but the vac is around 18". My car now has a mid range!!

I have about 500 miles on it now still taking it easy.

The GM lifters Summit sells seem very well made.

Thanks!

[Cliff Ruggles]

Good news!  I've not found a better cam for one of those engines and it's really easy on the valve train plus doesn't require a lot of spring pressure either.  Thanks for the update......