[oneg360]

I Just Wanted To Know What You Guys Think About These Head.

Edelbrock Aluminum Rpm 70cc Combustion Chambers Flows 170cc 575" Lift

 

[eric13617]

Gotta know what kind of motor,comp.ratio your looking for,cam specs,intake you plan to use,weight of the car(an idea),converter stall,rear gears,etc.And how much power you want to make.

 

[oneg360]

388 stroker

2800 10" stall converter 700r4 trans

10:25 1 comp forged pistons

comp cams xe274h (512/533) corrected lift 1.6 roller rockers

3200 lbs pound car w/ out me in it

barry grant speed demon carb 750cfm

air gap intake

 

[Dave427]

They are a great street head. I don't like the 170 cc runners for the cubic inch you are running. A 200 cc is more in the ballpark. But if you are looking for great torque these are the ticket.

Dave

 

[Daygoslow]

those heads should work well with that combination. had an almost identical combo in an old pickup i had. same cubic inch, same camshaft, same size converter, only difference was the heads (882 heads with the bowls blended, and 1.94/1.50 valves). truck ran 13.40's with a open diff and weighed in at 4160lbs with me in it. should be great combo in a lighter car and should pull good to about 5800.

 

[70-SS454]

Hard to go wrong with Edelbrock heads for either SBC or BBC ....well proven heads. If money is no object, you might want to also look at the new DART alum heads....

 

[eric13617]

Mario,sounds like a good torquey combo.Dave mentioned above that a 200cc head might be more in the ballpark.And I tend to agree,except that the info you gave is misleading.
First, a 10.25:1 piston is measured using a 64cc head and a 9.025 deck heigth.Now not knowing what your block is,(besides a .060 over 350) or your deck heigth or the head gasket thickness,I can almost guarentee the compression ratio will be between 9.4 and 9.7.You did state that your combustion chambers are 70cc,right.
Second,the XE274H cam is a split duration with 230 and 236 duration at .050and .490 lift on INT.and EHXT. With 1.6 rockers,lift should be around .512 and duration should pick up 2 or 3 degrees.
Thirdly,the converter you have in my oppinion is too high.A 2200 should be plenty.
Forth,carb is too big.Use this formula;CI X max PRM / 3456 X V.E.(volumetric effeciency)usually 85% but most use 100%. 600 Vac.Sec.should be plenty.If you do decide to use the 750 Double pumper,don't be suprised if it idles very rich.
And last but not least,remember that when you build a motor or a whole car for that matter,that you should try to match EVERYTHING to work togeather. Your transmission sounds like a good choice.And a rear gear around 3.50,will give you plenty of torque to fry the tires while still cruse at a decent RPM.Intake is perfect.
Just trying to help man.

 

[oneg360]

Thanks, Eric I went with the 750 carb just because I will be working on a 434 sbc very soon to the track. I built the 383 for a mild project, thanks for all the advice I will look you up when I start my next build. Oh and by the way thanks for the correction on the compression.