leigh1322

My engine builder is extremely pleased with the results they get from one of the off-shore BB aluminum cylinder heads. On a 620HP BB that already had well ported 990 rectangular ports on it, they just bolted these on and gained 100HP! Motor went to 720 HP. In a 3600 lb Buick it went from 10.2 to 9.8 with no other changes. They did nothing to the heads except mill them a little and change the springs. Ported as they are out of the box. He has tried others and they were garbage, but this one he likes. It's got thick decks etc.They perform as good as the AFR heads. PM me if any interest in finding out more, I can ask.

TheGreek!

How about just telling us what brand they are and what the cost was?

cv67

Something that just came out or been around? Post up the info

leigh1322

Jeff didn't tell me the brand or his source, but did say they are about $1395 ready to install. With normal hydraulic type springs. I'll try to get a picture or more info next time I'm there if interested. They just tested them on one of the race cars last week and were really happy.

jackson

There are two above and me makes 3 that're interested.

Please post brand, source & part number.

derekderek

most inexpensive heads have decent castings these days. Pro Comps flow pretty good. NEVER USE INEXPENSIVE VALVES-SPRINGS!!! when the head pops off the valve, it becomes expensive after all...

L88Plus

ProMaxx is my guess. Very nice for the money...thick decks, weigh just about the same as Brodix and AFR, very clean ports as-cast. I have a pair of the 317cc's for an upcoming 565 build

leigh1322

OK decent amount of interest here. One more tidbit that I remember was that they were the 325cc versions. I saw the chambers a few weeks ago, they were way different than mine, they are the new high tech heart shaped ones. Other than that I don't know any more. Jeff reveals his secrets very slowly, that's why I spent the last two days there with my camera and played assistant during my short block build. I'm not going back for a few days, Carlisle instead, so won't have any more pics or info for a week. You could call Jeff Keown Garage, Bristol, Pa, cell: 215 dash 946 dash 0707. He's there seven days a week, afternoons and evenings, unless he's at the track at Atco. Used to be a nine man machine shop, but has since downsized to a one-man, trying to slow life down and retire, but he still has all that equipment. Can't drive a race car anymore, and he's only working half days now, so has time to talk to you unlike some places. He really tried talking me into these for my car, but I wanted to stick with the OEM snowflake heads. So if I ever get tired of 530hp I know how to bolt on 80-100 and still be money ahead after I sell the snowflakes.

cv67

Your machinist may be a great guy but most Ive known sell waht they make the most on.
Cheap heads...known to have cheap guides, seats, hardware etc. Or stuff aint lining up. Hope these are real good though...the promaxx are getting better. Wouldnt come near PC with a 10 ft pole. Had too many failures with "Good" heads, from here on in its the best built from scratch or nothing. To each thier own.

JasonAndrew

Buick, is it a BBC or a BOP? Good and inexpensive is an oxymoron.

derekderek

Is this the Corvette place in Bristol or the 2 guys who used to run that speed shop that was near the turnpike on 13? I think they bought a 454 block off me bout a year ago.

leigh1322

Derek it's the old Precision Performance Speed Shop near the turnpike and 13. It's now buried off 13 in an industrial park. It's shrunk and is just Jeff and his sons now, and a dozen or so race cars. You know what if you sold him a marine motor, it just might be the one that winds up in my car.

Cusinart I agree. I think Jeff means the castings are good, but he likes to use his own hardware.

JasonAndrew it's a BBC in a 68 skylark. Used to be a Buick motor. He put a custom made panel replacing the back seat which has a combo of the Buick Logo with the Chevy emblem inside.Just to mess with people.

derekderek

68 Skylark is after all a Chevelle. It was a truck block, but with 2 boats in the yard he may have thought it was marine.

cv67

Hope its not PC....one more reason not to buy that cheap overseas crap!!! Nothing good is cheap period!!!

Dont think OP was aware of this type of stuff. It can take out an entire engine real quick. Save more, burn up the visa get good stuff
Even with brand name hardware doesnt mean the rest of it is straight, lined up concentric etc.

https://www.chevelles.com/forums/13-...ds-update.html

ronarndt

Also check Shaw City Engine Works in CA. They buy castings from Canada and will make them as fancy or plain as you wish. I got a pair of 119 cc open chamber as cast BB alum heads with valves and springs installed for under $1000.