what size carb and intake?

[Jaysam]

Ok guys so i'm trying to upgrade my '74 Satellite in baby steps. Recently picked up a 8 3/4 rear and my car has a bone stock 318 w/single exhaust and a 2bbl carb. Once i put duals on it (not sure if to get headers or just come off the manifolds yet) would a edelbrock performer 600cfm carb be to big for a stock 318?

 

[68 HEMI GTS]

600 would be fine on a dual plane intake, id use a holley but thats just me. don't forget you still have 2bbl valve springs

 

[WileE]

Back in the 70's, we used to do similar upgrades for performance and economy, as we were dealing with the bogus gas shortages. People wanted budget upgrades. Usually it would entail SMALL-TUBE headers with dual exhuast. If the heads were off to do a valve job, we'd do a slight cut for a minimal compression bump. The manifold of the day was an Edelbrock Streetmaster, today I'd use the air-gap manifold. We'd use a 600cfm Holley vac carb so the Performer you mentioned would be good. Adjust the timing curve, jet accordingly, and the 318 made one good street motor. This worked for all small-blocks of the day, I did this on customers small-block Chevy's/Fords as well, with good results.

 

[YY1]

Performer/600 is probably the most common 318 upgrade.

I have three of those setups. One I assume is stock internally, and has headers- yard drives.

One is a roller cam 86 motor with manifolds and duals- not running, yet.

The third is my all original Satellite that will get installed this spring.

It's already got 2.5" duals after the manifolds.
I'm also going with the "small" summit cam.
It's not quite as big as the factory 340 grind, but it specifically says you can keep the stock springs, and it's a .045 increase in lift.

I figure about 20 HP incrfease from each mod, and should take the 150 net HP stock number up to about 210-215 or so.
Should be a noticeable torque increase as well.
I've heard the cam in an otherwise stock 318, and it has a fairly decent lope, as well.

 

[Jaysam]

600 would be fine on a dual plane intake, id use a holley but thats just me. don't forget you still have 2bbl valve springs

Sorry to have to ask, i never really had the chance to do these things before so its all a learning experience for me. So will i need to change the valve springs in the heads in order to swap to a 4bbl intake and carb?

 

[WP29440SE]

Sorry to have to ask, i never really had the chance to do these things before so its all a learning experience for me. So will i need to change the valve springs in the heads in order to swap to a 4bbl intake and carb?

no , you dont. bolt it on and go. i am using my original 2bbl throttle cable bracket. you will need to extend your kickdown rod or find one for a 4 bbl, and make sure its set-up properly.

 

[YY1]

Did you just saw the end off and put in that barrel nut as a turnbuckle?

Nice lookin engine bay.

I LOVE seeing what the car's body color looks like right next to the engine color.
One of my favorite things about our cars.

 

[RustyRatRod]

A 600 Holley would be perfect. If it was me, I would look for an old school intake. The Edelbrock LD4B would be real good. It would be a step up from the Performer but it still retains the 318 size ports. If you cannot find an LD4B, (they are difficult to locate) the Weiand Stealth #8022 is almost the same thing. You'd need to have the ports in the heads opened up right around the opening to match it though. I never recommend the Performer, because it's not a performance upgrade. It's a stock manifold made out of aluminum. I also recommend addin headers too. Nothin else will add power like they will.

 

[Jaysam]

super77, thanks alot for the pics, that is such a huge help.

rusty, also a huge thanks for the info. i want to add headers but wondering what will fit with out any hassle or mods, and i looked at summit and they have engine combo kits, and one for the 318 has a holley 600cfm with a weiand intake not sure p/n# with a cam.

 

[WP29440SE]

Did you just saw the end off and put in that barrel nut as a turnbuckle?

Nice lookin engine bay.

I LOVE seeing what the car's body color looks like right next to the engine color.
One of my favorite things about our cars.

its actually just the threaded type KD arm, so i added the barrel nut and a couple inches of all-thread. it worked perfect. thats what seperates the mopars from everything else is the body color bays. love em'

 

[YY1]

Jaysam- are you planning on keeping the A/C if it has it?

The reason I ask is that the perf intake has the offset thermostat location, and several heater hose locations. The small block RV2 compressor mount will cover most of the center of the intake nose, and most aftermarket intakes have the thermostat located right in the middle.
I'm pretty sure the Weiand thermostat is centered. Not sure about the LD4B (but good luck finding that one).

 

[Jaysam]

No the car is pretty much bare bones. Whoever ordered it ordered it with a 318 but no A/C, no power steering, no power brakes(but is has rotors up front),
and a manual trans. I really like it that way, although it would be nice to have p/s and p/b.

 

[RustyRatRod]

Then if you don't have A/C to worry with, I certainly would not put a Performer on it. The Weiand is a much better intake, and even if you do not open up the port openings in the heads, it is a more substantial upgrade than the Performer. Just look at the difference in the runners for yourself. It's so evident a blind man could see it. lol

 

[Jaysam]

Then if you don't have A/C to worry with, I certainly would not put a Performer on it. The Weiand is a much better intake, and even if you do not open up the port openings in the heads, it is a more substantial upgrade than the Performer. Just look at the difference in the runners for yourself. It's so evident a blind man could see it. lol

Thanks again for the info. Yea i'm sold on the Weiand intake,and i'm also going to go with the holly 600cfm over the Edelbrock carb i had thought of earlier.

 

[RustyRatRod]

I think you will be happy with the Holley. For ME they are easire to tune.

 

[67 coronet]

the holley and weiand are great choices.as rusty said,headders are the best hp for the buck you can install on minor build ups.even the "cheep"ones work way better then your stock manifolds.a motor is just an air pump,so the air needs to get in and OUT.since you are already changing to dual exhaust you have that cost figured.

 

[Jaysam]

I think you will be happy with the Holley. For ME they are easire to tune.

your right , i looked on summit racing and the engine combo kit they offer is the Weiand stealth #8022 and my mistake the Holly is 670cfm street avenger, not a 600cfm

 

[RustyRatRod]

The 670 will work great. IMO, it will actually be better. Since it is a vacuum secondary carburetor, it will only act as big as your engine needs now. Later when you stretch it's legs and do more improvements, it will still be enough carburetor. I think that's an excellent choice.

 

[YY1]

Sounds like a solid plan.

I never had a car with a/c until I got my 93 Dakota in 96.
(OK my Duster's a/c worked, but only about 60%)

...but due to the myth of global warming, a/c is almost mandatory 9.5 months out of the year down here, especially at 98+ degrees and 98+ humidity. (yes it's worse than it was in '88, when I moved down)

If any of mine were more of a race car, rather than a warmed up cruser that might get to the track a few times a year, it might be a different story.

...and that's another "better than gm" item...

The cowl vents in Chryslers KICK ***! 150% better than gm.