<VV> 140's in a PG Rampside?

[Jim Davis]

You need 61cc combustion chambers with a flat topped piston or an 11 cc 
dished piston with stock heads and a 50 cc combustion chamber.  That 
will give you a 9:1 cr (approximately).   Stock 140 and 110 heads have 
52cc combustion chambers.

  Cut the barrel seats down to the combustion chamber step and bore the 
heads to 3.94" in dia and you have 39 cc combustion chambers in the 
heads.   Hogging the combustion chambers to 94 mm and you have a 46 cc 
combustion chamber.   The nice thing is with a little combustion chamber 
work with a rotary file and you can run a 10.7:1 CR  (requires 91 octane 
or above) and have more off idle torque than you could ever imagine.  
This engine does require a gear drive starter as the cranking pressure 
is above 180 psi (cold) with a 272 degree cam.
Jim Davis



On 3/24/2016 3:19 PM, hallgrenn via VirtualVairs wrote:
>      
> Matt,
> SMOG heads, but which ones?
> Bob (thinking ahead to the next engine) Hall
>
>
> Sent on the new Sprint Network from my Samsung Galaxy S®4
>
> -------- Original message --------
> From: Matt Nall via VirtualVairs <virtualvairs at corvair.org>
> Date: 03/24/2016  3:30 PM  (GMT-05:00)
> To: virtualvairs at corvair.org
> Subject: Re: <VV> 140's in a PG Rampside?
>
>
>
>> Tim's offer to sell a pair of 140 heads that were run in a Rampside got me
>> wondering.  How many are running 140's in their F/C's.  The reason I ask is
>> that I recently acquired a Rampside without an engine.  I have what I need
>> to build either a 140 or a 110.  Since I will essentially be pushing a
>> brick upstream at anything over 60mph, I cannot really see any reason for a
>> 140.  I would love to get input from those of you that actually have a 140
>> engine in your FC.  If it makes a difference, it has a powerglide
>> transmission,  thanks,
>
> Cliff Tibbitts
> ==================================================================
>
>
> You know me... don't even like riding in the BACK  of FC's!
>
>
> Go  94  mm  Big Bore with open chamber SMOG   heads  and you'll be able to run that puppy up to 80 at will... will probably run on 87 but you've always got 89   and above to go to..
>
>
>
> Matt Nall
> Charleston, Oregon
> http://tinyurl.com/The-Corvair-Patio
>
> http://tinyurl.com/Matts-Tech-Pages
>
>
>
>
>
>
>
>
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