[242177P]

Originally Posted by 64speed

1200 is a big number for things like springs retainers and valves. I actually looked at the parts side by side. Ascertained on my own volition that there was no way these things were coming from two different places and made my decision! The knockoffs took global west alignment specs. At best these heads are cast in China where as we know where Edelbrock is cast

Umm, OK? 1000 is a big number for bushings and balljoints. As for the knockoffs taking GW alignment specs, well, I had to look that one up. You actually bought copies of their control arms, and then you contacted Global West for support? You bought your Chinese parts because you could save some coin, so stop being judgemental and let GZR do his thing.

[pmd400]

The problems I have with these heads is that the edelbrock bare heads are only $130 more.
The assembled speedmaster heads for 440 mopar and 455 oldsmobile are close to 40% cheaper then the pontiac heads. Why?

[64speed]

Originally Posted by 242177P

Umm, OK? 1000 is a big number for bushings and balljoints. As for the knockoffs taking GW alignment specs, well, I had to look that one up. You actually bought copies of their control arms, and then you contacted Global West for support? You bought your Chinese parts because you could save some coin, so stop being judgemental and let GZR do his thing.

Like someone else pointed out it needs more evaluation.

[64speed]

I said we know where Edelbrock is cast which is USA

[GoatZillaRacing]

Over the years how many sets of 670's, 16's 48's etc., have been butchered up, blown up, cracked from overheating or freezing, piston kissed, valve sank, well you get the idea!

They ain't making these ever again! If you have a nice set, you might consider putting them away and running these modern replacements.

It's time to start saving those original heads for restoration projects.

My dragster has 62's on it that are pretty close to maxed out for d-ports at around 260 CFM. These out of the box as cast street heads flow 289/202 CFM at .600 lift and weigh a bunch less (I'll be weighing them later today).

Let's help keep the past alive as we move into the future.

[64speed]

I wasn’t trying to poop on anyone’s efforts I just feel like with such an important part it needs a lot of scrutiny before everyone just starts clapping their hands and jumping up and down. I will have almost 10 grand in my engine and I would hate to lose it over 300 bucks

[242177P]

Originally Posted by 64speed

I will have almost 10 grand in my engine and I would hate to lose it over 300 bucks

$300??

[64speed]

Originally Posted by 242177P

$300??

I was typing and reading at the same time I meant 1200

[77 TRASHCAN]

There may be perceptions of the Pontiac Community that we don't think about much.....Pontiac enthusiast's are very loyal to their Pontiac brand...sure are NOT to GM, but that's another fish to fry...
Maybe Edelbrock dropped their hook in the water (after Arnie and others talked Vic into it) and priced their first batch high enough to see what will happen. maybe the first batch was more profitable than we know, and they kept the pricing there. The stuff keeps selling...

[242177P]

I can offer a partial explanation for Olds heads being cheaper, but IMO it doesn't even come close to explaining the pricing discrepancy. If you look at a bare casting it's a rectangular block, nothing but right angles and holes.

[GoatZillaRacing]

Originally Posted by 242177P

I can offer a partial explanation for Olds heads being cheaper, but IMO it doesn't even come close to explaining the pricing discrepancy. If you look at a bare casting it's a rectangular block, nothing but right angles and holes.

It is one basic looking head isn't it. I was looking at it thinking "flathead".

[GoatZillaRacing]

We just ordered another singe bare head to be sliced up and dissected to evaluate these heads properly. Look for an upcoming magazine article with all the details.

[adynes]

Originally Posted by GoatZillaRacing

We just ordered another singe bare head to be sliced up and dissected to evaluate these heads properly. Look for an upcoming magazine article with all the details.

Will you be using/testing the Speedmaster MLS head gaskets too?

[64speed]

I have found places that had the AMC head on sale for less than the Pontiac head. You can’t tell me AMC is flying off the shelf. I saw my first aluminum headed Pontiac at the Run To The Sun car show this year and was ecstatic. I asked a bunch of questions from the older gentleman and quickly ascertained that he had bought them for the cool factor not for any real performance reason. I asked him to start it so I could hear it and he did and it was quiet as a mouse. I spent a lot of money on my engine. It’s gonna be a powerhouse. My wife asked me why the over construction of something I am just going to drive regular and I told her just because you treat it like a housecat doesn’t mean you don’t want it to roar. I got a lot of ricers and 90s mustang kids in my neighborhood who are gonna **** their pants the first time my car I drove home looking like a hunk of crap pulls itself out of the garage under its own power for the first time.

["QUICK-SILVER"]

Originally Posted by GoatZillaRacing

Max Lift: .580"
Coil Bind: .740"
Intake Install: 135lbs @ 1.8
Exhaust Install: 135lbs @ 1.8

Don't get/understand the .160" difference between max lift and coil bind.

Well aware there has to be some slack there. Just thinking .050"~.060" was the safe range. Like these heads should be good for another .100" lift or so.

May be off my rocker this AM
Clay

[GoatZillaRacing]

Originally Posted by "QUICK-SILVER"

Don't get/understand the .160" difference between max lift and coil bind.

Well aware there has to be some slack there. Just thinking .050"~.060" was the safe range. Like these heads should be good for another .100" lift or so.

May be off my rocker this AM
Clay

These are set up for hyd flat tappet and/or hyd roller applications. My guess is that .580 is the max lift because more would create excessive spring pressure on a flat tappet application. Should be good to .680 on a hyd roller.
Either way, you or I would set our springs up correctly for what ever cam we were running. Example. I'm putting roller springs on these very heads for a solid roller just to test.

["QUICK-SILVER"]

Originally Posted by "QUICK-SILVER"

Don't get/understand the .160" difference between max lift and coil bind.

Well aware there has to be some slack there. Just thinking .050"~.060" was the safe range. Like these heads should be good for another .100" lift or so.

May be off my rocker this AM
Clay

Best I can tell in the pics is five rounds or four air gaps. So the .160" difference would be .040" per gap running .580" valve lift. Some might call that a tad on the tight side. Should be safe enough for a true 'street' car application. And/or, keep max RPMs in a factoryish redline range.

Clay

[tom s]

The bean counters are running Edelbrock,ROI is all the think about!Tom

[grivera]

Casting looks great. Thanks for the update and looking forward to your results.

[GoatZillaRacing]

Why destroy a brand new $700+ head? Because we want to offer our customers Quality and Affordable Reliability. I have more slicing to do and will be publishing the results in an upcoming magazine article.

So far these heads are exceeding expectations and that's exactly what we want to do.