[Skip Fix]

Originally Posted by steve25

Most of Fulpers so called porting jobs where just a sand and polish ( Eye candy !), and if the flow picked up 10 to 15 cfm over stock you where doing good!

My first set of E heads I got from Bruce where he did one intake and exhaust port. I played some with them and was worried I'd mess them up and sent them to KRE(before the days of CNC). They said the exhaust port was done quite well by Bruce-so not all bad only cosmetic stuff.

["QUICK-SILVER"]

Originally Posted by Skip Fix

What Steve said all have the same casting # on the head and not sure I've ever seen a part number stamped on the head.

Easy way to tell 87cc chambers are machined, 72cc cast. New version end head bolt holes in the valve cover area are about the same height as middle bolts, early heads short bolts there.

My 72cc have generally measured closer to 75.

Originally Posted by *67firebird*

I'm no Longer interested, if anyone wants these take em. There is a set of Kre heads on the sale section.** KRE heads sold already dang! Either way I don't want 87cc heads...

Originally Posted by Tom Vaught

Well the heads that you posted the link for were actually very good early Edlebrock 72 cc heads, not 87cc heads. But other heads will pop up I am sure.

Tom V.

Would someone please explain. Heads in the CL add have slick looking chambers compared to my 'as cast' chambers.
I've got the early cast no. 6056 with shorter end bolts and they got bought as 87cc heads.
Anyone got pics? There's got to be a visible difference.
IDKClay

[Tom Vaught]

Easiest way to tell a early 87 cc head from a early 72 cc head is if you look at the intake manifold gasket surface on the head and you see a DRILLED hole about 1/2" in diameter where the stock heat cross over would be, you have an 87 cc head. If that surface is not drilled in that location, then you have the 72 cc head. ALL 72 cc heads were not drilled there.

Tom V.

[Matt Meaney]

Originally Posted by "QUICK-SILVER"

Would someone please explain. Heads in the CL add have slick looking chambers compared to my 'as cast' chambers.
I've got the early cast no. 6056 with shorter end bolts and they got bought as 87cc heads.
Anyone got pics? There's got to be a visible difference.
IDKClay

wouldn't be out of the question to polish the chambers, when the porting was done.

["QUICK-SILVER"]

Originally Posted by Matt Meaney

wouldn't be out of the question to polish the chambers, when the porting was done.

Just from what I understood the OP checked these and they were 87's
IDK Can you polish 15cc's out of a chamber?

My problem is if my heads are 72's the new build will be right at 14:1 CR.
I can use my HO heads and get in the 10:1 range...just don't want to drill them out for the 1/2" head studs.

Pump gas friendly ain't looking too good right now
Clay

[Matt Meaney]

Originally Posted by "QUICK-SILVER"

Just from what I understood the OP checked these and they were 87's
IDK Can you polish 15cc's out of a chamber?

My problem is if my heads are 72's the new build will be right at 14:1 CR.
I can use my HO heads and get in the 10:1 range...just don't want to drill them out for the 1/2" head studs.

Pump gas friendly ain't looking too good right now
Clay

my limited understanding of the early heads, is the "as cast" rough chambers were 72cc and those chambers were then machined to 87cc by edelbrock to give the lower compression option. with different part numbers to identify each. i am not aware of any 87cc heads with a "as cast" rough chamber.

[Tom Vaught]

It is my understanding that if a person had someone like Dave at SD Performance use their "Soft Chamber" CNC program on a 72 cc head you could get close to a 87 cc chamber.

This would support the statement above by Matt M that Edelbrock just machined the chambers for the 87 cc heads. Dave B's "Soft Chamber" would be a lot newer technology vs the old chamber 87 cc stuff.

Tom V.

[Steve C.]

Repeat... post number 9

.

[lust4speed]

All of the early port work for BF was done by Tim Martindale, and for the little amount of money and time allowed by BF, Tim did a good job. My very early RRE 87 heads were flowed by Dave at SD prior to starting additional work, and they flowed 305cfm when they came in the door.

I've got an early 87cc head out in my garage without the crossover drilled, and the Edelbrock tech I contacted told me that shouldn't have happened. My friend ended up with two used heads from a shop that used the crossover as the key to the small chamber heads, and now has one 72 and one 87 head. Story gets a little worse since it wasn't caught by that shop, and they put the engine together, and it always ran funny. Owner brought it over to me, and I tore into it to find the problem, and ended up being the messenger of the bad news. The really crappy thing is somewhere out in Pontiac Land there might be an identical engine.

[*67firebird*]

Does anyone have a set of 72cc heads, that can take a picture of the chamber?

When i went to look at the heads the chamber look way to big to be 72, I tried looking on the Edelbrock page along with summit and jegs, but it seems like they use the same picture for all heads, so I could not make the difference in chamber size.
Also, all the exhaust ports had Heli-coils, do they come like that from the factory?
If the CL seller had more info i would have picked them up, but it was too risky.

BTW he said the heads were purchased from Team C performance in lakewood, I dont know if that will help with figuring out who ported them, but have at it.

Bruce F shop is about 3 miles from me, never been, just saying.

[Skip Fix]

Here is an as cast 72. 87s are totally machined I would bet you could see mill/CNC marks vs polished 72ccs, and the 87 is visibly deeper.

[Skip Fix]

Here is another I found with a Butler head gasket .

[Matt Meaney]

Originally Posted by *67firebird*

Does anyone have a set of 72cc heads, that can take a picture of the chamber?

When i went to look at the heads the chamber look way to big to be 72, I tried looking on the Edelbrock page along with summit and jegs, but it seems like they use the same picture for all heads, so I could not make the difference in chamber size.
Also, all the exhaust ports had Heli-coils, do they come like that from the factory?
If the CL seller had more info i would have picked them up, but it was too risky.

BTW he said the heads were purchased from Team C performance in lakewood, I dont know if that will help with figuring out who ported them, but have at it.

Bruce F shop is about 3 miles from me, never been, just saying.

I would have rolled the dice at $1500. get one intake and exhaust port flowed and a chamber cc'd. if it meet my needs, score. if it's not what I wanted, put it back up for sale with good info and at least get my money back, if not make a few bucks.

more than a few people feel that a heli-coil in aluminum is a stronger thread than just the aluminum. maybe not factory, but a plus in my book.

[vidguy]

Bringing this back - In this case: would this be an 87cc or a 74cc head? NOT 87 as it is not machined, right?

[steve25]

That is the smaller chamber head.

[vidguy]

Thanks Steve

[Skip Fix]

Yep a "72" cc but mine are usually around 74-75cc.

[Tom Vaught]

Pretty sure that ALL 72 cc heads had a cast chamber and the 87 cc heads had a deeper machined combustion chamber, as one way to tell on a untouched head.
Heat riser drilled hole in the intake manifold face as a second indicator for the 87 cc head.

Tom V.

[blueghoast]

I got a good deal a long time ago on a set of 87'cc heads and I wanted 72's
So I deck them a hundred thousants and got 72 or pretty close and I'm
still using them today.

GT.

[steve25]

Actually that .100" cut got you down to 70.3 CCs assuming the heads are still on there first valve job!