[Skip Fix]

They did not have that warning or really any instructions with my heads.

[ID67goat]

Originally Posted by Skip Fix

They did not have that warning or really any instructions with my heads.

No disclaimer, instructions, etc. with the as-cast heads either…

[blueghoast]

Uh lets see lots of questions, I'll see if I can answere them all.
First I have a couple dyno sheets from two motors I did on here.
I think it was about 2-years ago and one customer motor I'll
have to see if I have the sheet for that. I ported all of my own
heads myself, The best I've done 315-320cfm. I watched a lot of
head porters and paid a little attention. Enough to get myself
so far a best of 625HP. Wish I was better like some on here;You
guys know most of them. When I did the blend from the seat you
can't feel any change. I'll try to locate the dyno sheets on here.
I'llpost up the builds to of what the componets are and some of the
other questions that were ask. I just finished a 455 build that hasn't
been to the dyno yet but will show that after testing.

[blueghoast]

Originally Posted by Baron Von Zeppelin

Thanks for sharing your results with us , Blue.

I think the seat dropping was in the Chevy camp early on.
Must have concerned them enough to include disclaimers with all their heads now.

These CNC versions need more figuring out.
They should do a lot better than your friends heads if somebody can finish out a pair fairly proper.

Have a feeling they are going to be tough to sell at full retail being unfinished.
Nobody knew that beforehand.

Yes your rite one here about a bad part and thousands of people here about it.
Do some thing good or great and one person here's about it.

And what happened to there CNC head that is terrible numbers and they
look great. I would have bought a set but I spent all my money on other
stuff at that time. theres allways next year. Hope someone can fix that.

GT

[Gach]

Blue, point is after seeing Skips results helps others make a decision. The deal that’s makes these heads worth it is only on Black Friday deal once a year. So if a guy comes to me and says what do you think are they worth the $1400.00. Problem is guy that’s asking has no experience or knowledge of ports or porting. So he’s relying on me. So the bottom line is there not a bolt on head that you can make 625 hp with. Especially after seeing skips results. Also judging from intake match up and work needed to intake to make it work. This is kind of why I’d love to hear your spec’s. Like cam spec’s, intake, carb, compression. I think guys have learned allot about these heads from this thread.

[grandam1979]

Originally Posted by Formulajones

Correct, that is a disclaimer that is sent with each set of heads. People have been posting about that all over the interwebs with a lot of examples. Doesn't mean they all fall out but it's certainly not something that's made up either. The disclaimer is for a reason, lol.

That’s bs I have had 5 sets of these heads there’s no disclaimers with any of them. The first set we got in 2019 is still in service.

[Formulajones]

Originally Posted by grandam1979

That’s bs I have had 5 sets of these heads there’s no disclaimers with any of them. The first set we got in 2019 is still in service.

Guess you'll have to wait for a seat to fall out and then hope you didn't touch the heads, and see what SM tells ya


In service since 2019 doesn't exactly build confidence yet either. You didn't mention mileage. Really doesn't mean a lot if the car only sees 1000 miles a year.

[PAUL K]

Originally Posted by Formulajones

Guess you'll have to wait for a seat to fall out and then hope you didn't touch the heads, and see what SM tells ya


In service since 2019 doesn't exactly build confidence yet either. You didn't mention mileage. Really doesn't mean a lot if the car only sees 1000 miles a year.

Maybe the seats only fall out in the heads that come with the disclaimer

[Formulajones]

Originally Posted by PAUL K

Maybe the seats only fall out in the heads that come with the disclaimer

Yeah probably jinxed it

[blueghoast]

Originally Posted by PAUL K

Maybe the seats only fall out in the heads that come with the disclaimer

Now thats funny. LMAO

If the seats haven't fallin by now I don't believe it's gona be a problem.
I know mine haven't and I beat the **** out of mine. Maybe after a 100,000
miles mite be a problem I'll let ya no in 20 years. LOL

GT

[blueghoast]

Originally Posted by Gach

Blue, point is after seeing Skips results helps others make a decision. The deal that’s makes these heads worth it is only on Black Friday deal once a year. So if a guy comes to me and says what do you think are they worth the $1400.00. Problem is guy that’s asking has no experience or knowledge of ports or porting. So he’s relying on me. So the bottom line is there not a bolt on head that you can make 625 hp with. Especially after seeing skips results. Also judging from intake match up and work needed to intake to make it work. This is kind of why I’d love to hear your spec’s. Like cam spec’s, intake, carb, compression. I think guys have learned allot about these heads from this thread.

I'll get them up tommorow and maybe dyno sheets if I can remeber doing
pics again

GT

[Gach]

Thanks I would appreciate that.

[PAUL K]

Originally Posted by blueghoast

Now thats funny. LMAO

If the seats haven't fallin by now I don't believe it's gona be a problem.
I know mine haven't and I beat the **** out of mine. Maybe after a 100,000
miles mite be a problem I'll let ya no in 20 years. LOL

GT

I would agree ..... I think the seat issue limits the potential of the heads by limiting how large you can make the bowls. I don't understand why they don't fix the issue.

[mgarblik]

Originally Posted by Formulajones

Guess you'll have to wait for a seat to fall out and then hope you didn't touch the heads, and see what SM tells ya


In service since 2019 doesn't exactly build confidence yet either. You didn't mention mileage. Really doesn't mean a lot if the car only sees 1000 miles a year.

Obviously, at least 1 valve seat has fallen out of a Speedmaster head, Pontiac or otherwise. But that certainly isn't unique to Speedmaster. They are concerned enough to throw a disclaimer in the box with the heads now. How that would all shake out if a seat dropped and completely destroyed a 15K engine would be impossible to predict. But in all honesty, seats fall out of aluminum heads all the time. OE seats falling out of stock heads is not uncommon. Currently, the most talked about heads are probably late model hemi heads. Thousands of seats have fallen out of 5.7L hemi heads, 3.7L V-6 and 4.7L Chrysler engines. When cleaning these heads, the AREA, (Automotive Engine Rebuilders Association), suggests staking the seats in the heads before cleaning so they don't fall out. I personally wouldn't let a potential seat issue be the deciding factor in buying or not buying the Speedmaster heads. Other performance related shortcomings would be higher on my list. I still feel at a black Friday price, a bare set of non-CNC heads could be made into a decent pair of street heads with some work. Also feel there are much better choices if you want to build a race Pontiac engine. Finally, IMO the chances of having a camshaft/lifter failure are higher than having a seat fall out of a Speedmaster head. Neither is an outcome to look forward to.

[Skip Fix]

What is involved in a rubber/latex pour of the port? Brand names of stuff?

[Steve C.]

Cylinder-Head Port Mold - Pour It On!

Making a cylinder-head port mold. Here on a Pontiac example.....


https://www.motortrend.com/how-to/hppp-130700-mule/



.

[blueghoast]

No seat has fell out of the SM heads for pontiac, I don't no where that is
coming from. Now
pro-Comp had a problem a long time ago but not sence SM has takeing
over, At leased not the pontiac heads. I've ground the seat down to
match the bowl opening on all the heads I've done even the Eddy;ls
I've bought 3-sets so far 1 complete and 2 bare. This last time I bought
the SM stanlease steel intake vavles 2:190 that Im gona use in the
last set I bought. Shore seams the Speedmaster pontiac heads are
Getting a bad rap and from a lot of people that haven't or won't use
them because of hear-say. Maybe I'm the only one that hasn't had
A problem. Go figure, Don't I feel lucky ha ha.

GT

[blueghoast]

Man I just got trough typing for over an hour all the specs on the
motors I did and forgot to push post reply and lost ti all AARRRRRGGGG
Be back in a wile.

GT

[Gach]

Skip your not messing around going for port volume one of big things. Going be interesting to see.

BlueGhost, good information pretty extensive port work. Well good enough for good street motor.

[tom s]

Guys,there are TONS of people that dont come on boards like this.Im betting a lot of heads are sold on eBay everyday at the non BFD ad price.JMHO,Tom