Compression Ratio for #1 and #2 different than 3 through 8.

Thinking about lowering compression ratio for #1 and #2 cylinders by 1 point on a roots blown Veney deal. Anyone ever tried this with success?

 

We lowered 1, 3 and especially 6 on the screw blower deal, but have never done it with a roots.

 

lot of the fuel guys do it, seems to work fine..Dave

 

compression

15 thousands shorter rod,easier on rod bearing #1 and #2

 

Short rods

Short rods in 123 or you need a manifold shoe. we ran one with our roots with Veney heads and it was better than using short rods. if you lose quench(short rods) in a Veney head it really loses torque!

Mark

 

Keep the piston on the head , cut a pocket in the piston

 

Leave 1 and 2 alone and raise all the others.

 

I saw a Veney motor once that used different rocker ratio on the 1-2-6. Closed the valve sooner seemed to be working well

 

Thanks

Thanks for the input guys.

Randy

 

i look for build a shoe in my intake for better fuel distribution (i can't set back blower)just for know if you have picture. or information for build one thank . Eric

 

Contact sassy racing engines thay have been doing this for years on there pulling engines. Probably have the parts you need in stock so you wouldn't have to custom order new sets of rods and pistons.