Cam & Carb

[yardbird]

I am putting a cam in my 360, that is in my 72 duster, I want to go to the strip and still hot rod on the street.Right now I have stock heads and cam, single plane alum manifold, 600 edelbrock carb, 727 auto trans, no stall converter. Stock pistons bored 30 over. What size cam would give rough idle, and I think I will need a bigger carb also. It has a 3.91 rear.Any help would be well appreaited

[blue dodge bob]

Your best bet is to call some of the cam manufacturers. Tell them what you have and they will make a recommendation.

Good luck.

[ehostler]

A cam with a rough idle will kill your low end torque. The rough idle is caused by too much overlap. That overlap bleeds off cylinder pressure.

Any good cam manufacturer will also need to know your static CR, before recommending a cam. That is an important number, that you have not provided.

[rpr]

Check out the "Thumpr" cams, by Comp cams..........

Lunati Voodoo's sound wicked too.

[crisser]

Originally Posted by yardbird

I am putting a cam in my 360, that is in my 72 duster, I want to go to the strip and still hot rod on the street.Right now I have stock heads and cam, single plane alum manifold, 600 edelbrock carb, 727 auto trans, no stall converter. Stock pistons bored 30 over. What size cam would give rough idle, and I think I will need a bigger carb also. It has a 3.91 rear.Any help would be well appreaited

With no stall [or stock stall], you can`t go wild on the cam. I`d go with a Comp XE268 with that engine. You`re right, ditch the 600 and while you`re at it, the single plane manifold. Run a Performer RPM manifold and the larger carb. of your choice. Just not larger than a 750.

[rpr]

The 268/276 voodoo works pretty well with a medium/low geared car, with a 360. Need flat top pistons tho.
Are you looking for something that sounds meaner than it is?
The 600cfm carb will work fine too. For mild. And your going to be mild.

[rumblefish360]

What year engine? (I'll assume a low compression smog engine)
What exact intake manifold? (I'll assume a TorkerII)

Would milling the heads be out of the question?
Also realize a good heavy milling will more likely require the intake to be milled and or the bolt holes to be egged in order to fit hthe bolts into the heads. Not a big deal, just a cave eat to be aware off.

The 600 Edel. carb is small, but can be effective for the street and not a big hinderance for the track. Your seriously not giving up alot of HP in many cases with a smaller carb. It'll work better on the street where your living 90% of the time. Or better.


This is what I would do on the cheap;

Mill heads to desired comp ratio, do not exceed 9.5-1.
(This requires you to know how far down the hole the pistons are.)
Back cut the stock OE sized valves, race preped valve job on the heads
MoPars thin head gasket.
A Comp Extreme, XE 268 or the Lunati
2500+ stall converter.
Use headers. (Not listed above) 2-1/2 X piped exhaust

On the carb;
Use a K&N extreme or equal lid to aid in airflow. This lid will increase air flow since it allows air to go striaght down through the carb.
If yo have a dremel, and OK to use it on aluminum, whittle down the boosters in the carb. Becareful, they do not sell boosters new for the Edel. carbs and you'll be looking for a donor carb for replacement parts.

[yardbird]

Thanks for the info, I do have a set of headers on the engine, I have though about head work, but I am on atight buget right now. Any other infor you have or ideas would be greatly appreatied.

[rumblefish360]

Well, what is it your looking for besides the basic part list for the build your looking for? The head work listed above is cheap. It can wiat, not a big deal.

What year engine? (I'll assume a low compression smog engine)
What exact intake manifold? (I'll assume a TorkerII)

[DonCarr]

Here's a write-up on cams meant for lower compression than ideal, and stock heads. http://www.hughesengines.com/Index/p...z&partid=25114

Comp cams thumper is similar. It's the 107 degree centreline that is key.
http://www.compperformancegroupstore...ry_Code=THMCRS

I'm sure there are other brands and custom cams.
Vacuum is likely terrible.

[passing you]

regardless of the cam I would start with 700-750cfm carb

[DonCarr]

Yardbird was looking for a value carb. This is a value 750 cfm carb that should work well off idle. Really don't know much about them, but they claim to be wet flowed and have annular boosters.

Should compression, converter and/or heads get ported the thumper style cam may no longer be the best choice. Cranking compression could possibly be too high.

[valiant64]

Originally Posted by crisser

With no stall [or stock stall], you can`t go wild on the cam. I`d go with a Comp XE268 with that engine. You`re right, ditch the 600 and while you`re at it, the single plane manifold. Run a Performer RPM manifold and the larger carb. of your choice. Just not larger than a 750.

I agree w/ this