What Specs to look for when buying AL heads for a S/C cobra..

[95CobraMike]

What specs on cylinder heads should i look for when buying aluminum heads for my cobra?

i know i want a 64cc Combustion chamber to keep the Comp ratio down... but as far as valve size, intake runners and exhaust runners, what should i look for?

Any suggestions?
im looking at maybe some World aluminum heads
64 cc combustion chamber
200cc intake runner
2.02 intake and 1.60 exhaust valves

What do you think?

 

[fiveotony]

personally the afr or trick flows are mo betta in my opinion. How low of compression you wanna go? I would keep it close to stock comp.

 

[95CobraMike]

i think that stock combustion chambers for gt-40's are 64-65cc

 

[wytstang]

If I remember correctly TW heads had a better low lift flow then AFRs.

 

[95CobraMike]

im looking for something aluminum, good flow, big combustion chamber and valves, and a thick deck

 

[wytstang]

CNC Ported TW heads....65cc 185cc intake runners....

 

[S&B]

i run vic. jr. heads / intake with high boost and they work well

my .9 cents

 

[95CobraMike]

TW makes a 65cc combustion chambered head?


is it better for me to have a larger or smaller intake runner size?

 

[wytstang]

TW makes a 65cc combustion chambered head?

According to my new summit mag they do. As far as runner size since you are forced indution a large intake runner would benifit you well (so would a n/a).

 

[95CobraMike]

ok great....
anything else?
wytstang what do you think of the world aluminum heads out there? 64 cc, 200cc intake 2.02/1.60 valves? i found a good deal on some of them and think i might go for it...

 

[fiveotony]

world alum. heads are ok but I think the trick flow will make more power.

 

[wytstang]

world alum. heads are ok but I think the trick flow will make more power.

+1

 

[final5-0]

You know the big three ... TFS, Edel, & AFR usually put out good numbers

Since you are forced ... that may make some difference
but
I have seen others say the forcing of the air/fuel mix makes cylinder head choice not as critical as NA.

Just stuff I have seen ... here and there

Grady

 

[95CobraMike]

heres the thing, i want some heads asap... i have a chance to buy 2 world aluminum heads as described above completely assemblem.... a set of ped mount 1.7 RR's, and hardened pushrods for 1200 shipped...

 

[kbconv]

I'd lean towards stud mount. Once you look at the fastener size you will know why. Much stronger.

Many places would have the Edelbrocks or AFR's in stock, probably TW too. I wouldn't limit yourself to 64cc chambers. 60 or 61 should be just fine unless you are having detonation issues. Your already running pretty thick gaskets, lots of people just throw the cheap, thinner Fel Pros on and go just fine, I have.

 

[wytstang]

Here's my .02.....If you plan on keeping the car then take your time and do it right. Peice it together to make the most hp/tq as possible. Now going TW may require different size push rods (+/-). So if this package will bolt right up and you don't feel like spending more $$ or measuring to get the right size, then that will be a good deal on the winsors.