<VV> I WANT COMPRESSION!

[Bryan Blackwell]

Hi Mark,

The basics have already been covered, but one other thing I don't  
think was mentioned.  To a certain extent, a higher RPM engine is  
better able to use more compression without detonating, because  
everything happens more quickly.  If you take an otherwise stock 140,  
you can make it more detonation resistant by reducing the piston to  
head distance as outlined in other posts.  However, once you go  
beyond about 10:1, you'll almost certainly run into detonation if  
you're still using a stock cam - you'll just have too much pressure  
and too much time at lower RPMs.  The really high CR engines all have  
non-stock cams, and has was mentioned before you'll then need to  
check the valve train geometry.

Good luck, let us know what you end up doing.

--Bryan

On Dec 24, 2008, at 11:07 PM, Mark R Aksamit wrote:

> The time has come to take the stock 140 out of the race car and put
> something with a little more power in it place!
>
> I would like options to increase compression that DO NOT involve  
> changing
> any of the stock valve train and its stock geometry!