[Tim Corcoran]

Just to clarify, the SM heads are designed in Austraila, cast in China, machined and assembled in California. You can call them, they will answer questions and you can order over the phone or online. They are not made by Pro Comp as some have said.

[slowbird]

Originally Posted by Tim Corcoran

Just to clarify, the SM heads are designed in Austraila, cast in China, machined and assembled in California. You can call them, they will answer questions and you can order over the phone or online. They are not made by Pro Comp as some have said.

What design work went into them, lol. I think you mean they were copied in Australia

[Jay S]

Procomp electronics and speedmaster have many of the same part numbers and same company address.


Why wouldn’t a copy of something known to work, not work? Depends on how well it was copied. I’d say SM did a decent job copying. But let’s not give them more credit than they have due.

[Tim Corcoran]

Originally Posted by slowbird

What design work went into them, lol. I think you mean they were copied in Australia

Edelbrock copied Pontiac RA IV head, Speedmaster copied Edelbrock so what's the difference? Who did KRE copy?

Eagle billet rods come from China and machined in USA
Scat cranks are forged in China and machined in USA
Etc...

[slowbird]

Originally Posted by Tim Corcoran

Edelbrock copied Pontiac RA IV head, Speedmaster copied Edelbrock so what's the difference? Who did KRE copy?

Eagle billet rods come from China and machined in USA
Scat cranks are forged in China and machined in USA
Etc...

Edelbrock actually changed a lot. Valve location, port size, port shape, outer casting appearance, to list a few. SM pretty much just copied Edelbrock.

[Stan Weiss]

Originally Posted by Tim Corcoran

Just to clarify, the SM heads are designed in Austraila, cast in China, machined and assembled in California. You can call them, they will answer questions and you can order over the phone or online. They are not made by Pro Comp as some have said.

If you do a Google search for Speed Master and Pro Comp Electronics while they don't have the same phone number they do have the same address. 1101 W Rialto Ave

Stan

[YoungTiger428HO]

I purchased a set of SpeedMaster78 PCE281.2168 . Flat tappet Hyd. They have been fine. I have had no issues in the year since a put them on. I made no modifacations. They are on a 461 cid Pontiac Eagle rotating assembly. 10.2:1 with 1.65:1 roller rockers. That gives .528 lift with 13/32" ram air pushrods and 7/16" studs. Also had to change head bolts and go to round port headers. This motor just run great. I use a 1/2 a bottle octane booster every tankful. I don't know what the actual horsepower is but you hardly need the gas pedal!

[Tim Corcoran]

Originally Posted by Tim Corcoran

Just to clarify, the SM heads are designed in Austraila, cast in China, machined and assembled in California. You can call them, they will answer questions and you can order over the phone or online. They are not made by Pro Comp as some have said.

OK, maybe I am wrong about the association between Pro Comp and Speedmaster