quote:Originally posted by PanteraDoug:
... Anyone know if there are any manifolds that fit the A3,B3, C3 aluminum Motorsport heads BESIDES the Motorsport manifolds ... George? You out there? You happen to know?
Doug, its been a while since I've held a 4V intake gasket up to an A3 head, and I no longer have an A3 head to experiment with, I gave my last one to a nice guy in New York. I forget if the roof of the A3 intake port is the same height as the roof of the 4V intake port, or if it is raised. "If" the roof of the A3 intake port is the same height as the roof of the 4V intake port, then a Parker 4V Funnel Web would mate with the A3 head with very little modification. Both would essentially be 4V ports with the floors filled in.
Lets see if I can help you understand the 3V port configuration. If you ever held a 2V intake gasket behind a 4V intake gasktet, lined up the bolt holes etc, you would find the 2V port sits in the lower right hand corner of the 4V port, with the port floors at the same level. Now imagine raising the 2V gasket vertically about 3/8" until the roof of the 2V port is exactly the same height as the roof of the 4V port, the 2V port is essentially in the upper right hand corner of the 4V port. That is the location of the original 218/225 cc 3V port. Since then CHI has introduced variations of that concept with smaller ports raised a little bit higher (185 cc & 208 cc).
CHI also designed the 3V head to work with 2V intake manifolds, because when CHI introduced the heads they hadn't began making their own manifolds yet. To do this they made the 3V head just a little bit wider than a standard 2V/4V Cleveland head. That way, when a 2V intake was lowered in the "Vee" formed by the two heads, the manifold sat a little bit higher than normal and the runners of the 2V manifold aligned themselves with the ports in the 3V head. There would be a big gap between the manifold & the lifter valley rails, so CHI sold spacers to fill in that gap. The bolt holes in the 2V manifold also required a little bit of filing to make it all work. Now that CHI makes their own manifolds, they don't advertise the fact that 2V manifolds would fit.
The ports of the C302 SVO head are roughly the same size as a 2V port (a little smaller if I remember correctly) but the roof of the C302 port is raised about 3/8" higher than the roof of a 4V port. The manifolds designed for the 185 cc or 208 cc versions of the CHI 3V head may be a close match to a C302 port, EXCEPT for the fact that they are designed for the narrower "Vee" created by the wider CHI 3V head. So CHI 3V manifolds will not work without some massaging by a welder and/or machinist.
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quote:Originally posted by Joules5:
... George, a lot of forums have a 'sticky' for topics that come up with regularity or as repository for reference technical information .....
The Groupee software has the ability to "feature" a topic, and you've seen me use that feature from time to time, like I have the thread about Tod Buttermore's block project featured in the Community News Forum. About a month ago I decided to start featuring certain topics that I thought would be of general interest to most new owners, or those that are frequently asked questions. If you look, you'll find I recently featured a thread in the Engine Forum about building a 400 cubic inch Cleveland using all Ford parts. I will eventually do the same thing with a thread about the lubrication system, short block preparation, 4V intake manifolds, Duraspark ignition installation and a suggested 400 BHP street build-up. I'll also eventually feature threads in the Chassis Forum about suggested chassis modifications and wheel & tire selection issues. Those are the topics I have thought of so far, and I am always happy to read the suggestions of others.
-G