<VV> Tech question - Turbos & carbs

[FrankCB]

Dave,
     You need to tell us just what you want to accomplish by making changes to your present setup.  Autocrossing, road racing, track racing, drag reacing, street driving?????   Do you want higher boost levels, less turbo "lag", better gas mileage or what????
      Besides Bob Helt's excellent books, you might also read the Turbo Chapter in the Corvair Basics Manual and the recent articles in the CORSA Communique on updating and modifying Corvair turbocharging.  Of course, I MAY be prejudiced!!<GGGG>
     Frank Burkhard
    
In a message dated 09/07/09 04:11:16 Eastern Daylight Time, dave.thompson at verizon.net writes:
Sorry to get off the subject of "What CORSA can do for me", dues and forum 
formats..<SMILE> 



I have a 63 Spyder clone with a 64 drive train. It is basically stock except 
for being bored out +.40. I run a stock Carter YH #40205 with a #3840830 
turbo. My research tells me that they are both 1964. I use a Pertronix 
Igniter II, a Flamethrower II .6 ohm coil and a set of Seth's 8mm wires 
firing AC-44FF's. I finish off with a Magnaflow free flowing muffler. I run 
91 octane fuel and timing is retarded to 22 instead of the stock 24 to 
compensate for pinging. She runs great and I get a decent amount of power 
from her. I want to keep her in a near stock looking condition. 



Lately, I have been getting hesitation when I jump on it. I plan to rebuild 
the carb in the next week or so. 



I recently purchased a box of assorted Corvair parts. In that box among 
others was a # 40205 Carter YH carb. I understand that it is a 1965 -180 
carb which has a 1-3/8" main venturi verses my '64 1-5/16 venturi. I also 
got two turbos. One is a 1963 #3830551 and the other is a 1965/66 #3856709. 
They both turn freely with my finger. 



I have read Bob Helt's "The Classic Corvar " (great book Bob, thanks). I 
understand that if I rebuild the two spare turbos and use the exaust side 
from the 63 and the intake from the 65 I can expect better performance. It 
seems to me that if I use the larger 65 intake turbine I should also use the 
larger 65 carb. 



As I said, my current 64 carb needs to be rebuilt. Would I see any issues if 
I rebuild the 65 Carb and use it with my current 64 turbo? I don't have all 
the tools to rebuild the turbo at this time. 

Also, 



It seems to me that the primary difference between the 64 150 turbo and the 
65/66 180 turbo is the carb and the turbo. Wouldn't changing out the carb 
and turbo as I discussed above essentially give me 180 performance? 



Inquiring minds want to know.. 



Dave Thompson