Speedmaster Cylinder Heads
Drifting
Joined: Jun 2008
Posts: 1,565
Likes: 111
Speedmaster = ProComp Motorsports. Lots to read on the internet about ProComp, but the short story is they are imported products at very aggressive pricing. I don't have any direct experience with their cylinder heads, so I will let others add comments regarding quality.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Instructor
Joined: May 2016
Posts: 178
Likes: 22
From: Vermont
I looked up cylinder heads on You Tube & saw alot of interesting stuff. One person showed a cheap head & the leakage from the valves. I think the heading was " Don't bolt heads right out of the box " I'm looking at heads too, and I cannot be convinced that when the well-known brands like Edelbrock, Indy, Dart, etc. all run $2,000.- $3,000. a pair, that a pair of $900. heads are what I want on my engine. I'll pay the extra money for a known quality.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Any set of assembled heads needs to be pulled apart and checked. That average hotrodder will not have the tooling to do this so i would encourage anyone to take a set of heads to a shop for a once over. We had a set of $7000 heads in the shop that some fell asleep on the guide clearance.
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Instructor
Joined: Feb 2013
Posts: 193
Likes: 2
From: Illinois
I traveled your path around a year ago when I built my 383 stroker.
Against CF advise I took a chance on a set of aluminum heads called ''Flo-Tek''.
$740 per pair assembled all the features of AFR. My understanding is that they are cast in Australia and CNC machined at the Tri State Cylinder Head Co. in Indiana. Speedway sells them from stock.
I now have 12,000 miles on them with 0 issues, maybe I got luckey but just passing the info on. I ported them to a Fel Pro #1206 intake gasket and match ported a new Edelbrock Performer Air Gap intake to them.
Here's some pics:
Dykem on ports
Gasket port profile scribed
Heavy metal removal in mill followed by die grinder polishing/blending
Finished Head
Process repeated on intake manifold. That baby really breathes above 3k rpm.
Against CF advise I took a chance on a set of aluminum heads called ''Flo-Tek''.
$740 per pair assembled all the features of AFR. My understanding is that they are cast in Australia and CNC machined at the Tri State Cylinder Head Co. in Indiana. Speedway sells them from stock.
I now have 12,000 miles on them with 0 issues, maybe I got luckey but just passing the info on. I ported them to a Fel Pro #1206 intake gasket and match ported a new Edelbrock Performer Air Gap intake to them.
Here's some pics:
Dykem on ports
Gasket port profile scribed
Heavy metal removal in mill followed by die grinder polishing/blending
Finished Head
Process repeated on intake manifold. That baby really breathes above 3k rpm.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
I think there is a lot of truth in the phrase "Fast, cheap, reliable - you only pick two". For critical components, I always pick fast and reliable and cough up the extra $$$.