The power of the Vanagon engine is not the same as the 79 bus, the vanagon had smaller exhaust valves (33mm) to keep emissions clean.  This boosts exhaust gas temps and is part of the problem with the vanagon engines running high cylinder head temps.  The Porsche 914 engines had 36mm exhaust valves among other things.  So bigger exhaust valves would be a good upgrade for the Vanagon 2.0 engine.  This is a good site about type IV engines,  http://www.tunacan.net/t4/tech/heads.htm#stock

David

Date:    Thu, 11 Dec 2003 11:01:27 -0500
From:    Ben huot <huotx@VIDEOTRON.CA>
Subject: Re: Power of a 2.0L Air cooled vs 2.1L???

>>>>If you do get there, please share<<<<<
Well, i think i have been doing that for the past 2 years! Would you say so?

>>>Did I miss something, or do I have the only 2.0l FI 81 air cooled factory
rated in the high 60's HP??<<<<<

I can bring a Honda civic from 106hp to 140, just by playing with the head
section (polish, porting, shimming), i have been doing that with a very good
friend of mine since i was 20 years old, lets say that i have very
knowledgeable and well equiped friends. We work on very complicated heads,
like 5 valves Yamaha cylinders head. Like i said on above post, my 1.75L (5
for oversize) is pushing a lot, i did do some polishing on those. Sometime,
a very small modification will make a big difference.

I wanna keep reliability, so i won't push the first one (engine). Am also
looking for oversize pistons and barrels (no luck for now on type2 engine).
My goal is to bring the displacement to 2.2 or 2.3, am not there yet.

The case, crank, rods, and new cam are at the shop as we speak...

I am not being a wise guy neither. And don't worry, i will share... like i
always did.

This thread was about 2.0L-AC in a Vanagon, it as been answered. Power is
the same as a 79 Bus, Vanagon is more heavy... Some don't like the Bus/Bay
road handling, i don't care much about that. But, if you ask me which one
look better..... :-)))))))

I have a "dream" westy in my head, i am going to build this one, very soon.
And it will be reliable and powerful, you will know about it.

Regards, Ben
http://www.benplace.com/

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