What gives the L36 Higher Compression?

[matt5112]

so what a L36 top swapped to an L67 be faster than a stock L67?

Considering you'd have to run headers or a cam or intercooler just to run the 3.8, yes.

 

[matt5112]

My searching suggests the L67 pistons must have a larger dish in order to lower compression and increase piston-valve clearance.

 

[matt5112]

http://www.grandprixforums.net/l67-mechanical-specs-10138.html

 

[dsmuts]

A top swapped l36 on a stock pulley is supposed to be like an l67 on a 3.4 pulley

 

[matt5112]

It was still slow.

I should have dyno'd it so we would have had solid information.

 

[MoarkatsINmuhtrailer]

Yeah something was definitely off with your top swap matt. I couldn't understand why you were barely making the true power

 

[matt5112]

it made 267 STD on a 3.4 pulley with rockers at 5200-5500 est RPM.

Never took it higher because I failed to hold the car in third.

With leaky valves and some odd compression numbers while churning out liquid metal every oil change.

 

[MoarkatsINmuhtrailer]

Ahhh I see. I didn't know about the oil problem