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Corvair intake system?

5352 Views 5 Replies 1 Participant Last post by **DONOTDELETE**, Aug 14, 2000

chevota

Discussion Starter · Jul 30, 2000

I bought my first buggy a few months ago. It has a 140HP Corvair motor. The carbs and intake on it are aftermarket and suck the big one! Power is severly down. What is the "Trick" induction set-up for these motors?

Chevota

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· #2 · Aug 9, 2000

The hot set-up for purists is dual tri-port webers to tri-port heads. This makes tons of power but is VERY hard to find these days and expensive. It also needs to be kept in sync (NOT the musical group mind you!).

For off-road use going with a single carb on top of a manifold seems to work well with a 390CFM carb. Easy to maintain and no synchonization problems.

Here's a couple of links to pictures of my tri-port 140 vair with a 450CFM Holley on top.
http://albums.photopoint.com/j/View?u=101350&a=767015&p=13751117&Sequence=1
http://albums.photopoint.com/j/View?u=101350&a=767015&p=13751136&Sequence=1

(Hope this works)

BansheeMan </font color=green>/wwwthreads_images/icons/cool.gif

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chevota

Discussion Starter · #3 · Aug 10, 2000

Thanks BansheeMan, this does help. How does yours run? What is the powerband of that manifold? I'm hoping for the 3-7K range, but those runners look a little long. I will be making my own from scratch for two reasons. One, the heads have been milled to accept some lame weld on manifold, yes it's welded to the head! Two, I try to make everything my self first.

Chevota

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· #4 · Aug 11, 2000

Well, I'm not sure the exact powerband but the thing pulls really well about 2K and out through 6K. I try not to get about that. I'm est. HP at 200 but I've never dyno'd the motor.

The car is not as drivable as I'd like but I think that is more a function of the cam the previous owner used. He went with the most radical reverse cam he could and had a 700CFM Holloey on it. I think he liked to race up sand hills. I replaced the carb with a 450CFM Holley which helped but it still stumbles off idle sometimes.

Later...

BansheeMan </font color=green>/wwwthreads_images/icons/cool.gif

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chevota

Discussion Starter · #5 · Aug 12, 2000

Cool, looks trick. Single carb is just the thing I need. where and how much? My needs probably lean more toward the radical cam/race up hills mentality.

My case-worker says I need horsepower or I become....."Unpredictable", whatever that means.

Chevota

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· #6 · Aug 14, 2000

Order a catalog from Clark's Corvair. They have a 390 CFM set-up in there last I looked. For getting a tri-ported set-up like mine you'll probably have to go custom. I saw a tri-port set including heads for sale a month ago but not any more. You might try asking some of he regulars on the forum at the Corvair Centers website.

http://www.loop.com/~yujisilva/

BansheeMan </font color=green>/wwwthreads_images/icons/cool.gif

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