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Old 05-20-09, 11:18AM   #16
BDHABT
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Quote:
Originally Posted by Competition CNC View Post
Hi Mark,
I got the production drawing from Larry Wenzler the other day for the dimensional info we needed on those heads. We discussed spark plug location etc. among other things.

Were doing a modified version of our current Wenzler SC port design for your heads.
I wont discuss any real details on here unless you say its ok, but in general we modified the chamber program and changed some flow biasing around on the intake side from the port in Ken French's heads. He's running 8.50's right now with under 500 CI in a 69 Grand Prix.

You wanna trade for the RA-V engine? Just Kidding. It may not be nearly as powerful but it would get some strange looks.
Sounds like you have a good plan going.

Can`t wait to see the results.

BTW,Kenny is a good friend of mine.He`ll be doing the engine assembly and some other mods to the car.

Thanks.
Mark.
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Old 05-20-09, 02:56PM   #17
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you guys did kenny frenchs motor? that's a pretty nice piece.
I think Ken assembled it himself.
Bill and Ken and myself have been friends for well over 20 years.
But yea the machine work was done here at Carlquist Competition Engines. Competition CNC shares the same building. We do the custom CNC cylinder heads for Carlquist Competition Engines as well as many other shops around the country.

Kens engine is quite impressive to here on the dyno. It sounds awesome. We dyno much more powerful engines but some engines just have that sound.
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Old 05-21-09, 01:58AM   #18
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Nice to See the RAMV head and the SD block
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Old 05-21-09, 04:09AM   #19
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Thats a RA5 Block fwiw, Thats neat you are creating programs for the old Wenzlers I'm looking forward to what you come up with, They leave a lot to be desired with the SC's
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Old 05-21-09, 10:24AM   #20
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That's a RA5 Block fwiw, Thats neat you are creating programs for the old Wenzlers I'm looking forward to what you come up with, They leave a lot to be desired with the SC's
We have done several sets in the last few years. They make great power. I've revised the porting a few times now, tweaking and refining.

Guys who hand port Wenzler SC heads must cringe at all the material to be hogged out.
I first started using a Superflow flow bench 20 years ago and it was fun hand porting and testing and porting and testing and porting and testing....
But hand porting raw castings is a lot of work by hand. To tell you the truth, I wouldn't do it any more, I'd rather chew broken glass now. I wouldn't hand port set after set of a raw casting, maybe I'm just getting old?

Since we got the 5 axis CNC it makes it tolerable now because you know all you have to do is develop one port, one really good port, one time and then digitize it. Its nice knowing that you don't have a ball and chain around your ankle and there's light at the end of the tunnel.
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Old 05-21-09, 05:41PM   #21
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The holly grail of Pontiac factory engines....

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Originally Posted by Competition CNC View Post
I was looking for some technical dimensions for the wenzler Big Chief heads the other day and I stumbled onto this board.

I didnt find the info I needed but, Its looks like a good group of guys here.

I thought you guys might like to see some stuff were working on....









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Old 05-21-09, 11:34PM   #22
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Yea, the intake is one of 3 made from what I hear. Dual Quad for drag racing a 428.

You Pontiac gurus would know how many of these engines were made. I have no idea.
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