Approximately how much does it cost to install 3mm HGs? What should the compression ratio be after it is installed? Can it be installed and driven NA motor until turbo is installed (will it be too weak)? any recommended shops in socal or whats the difficulty for self install?

thanks

 

It should lower it to 9:1 somewhere around there. 3mm gaskets dont last that long. Maybe 20k miles, U can make 500+ hp on a stock gasket. Dont open the motor unless u have to.

 

I wouldn't mess with the 3mmHG. Just keep it stock. Do a pump gas tune and a race gas or e85 tune (e85 only if your fuel system can handle it )

 

I blew a 3mm headgasket so I know what you're talking about. But has no one got more than 20k out of one?

 

^^ not sure but if the OP wants to lower comp then i would recomend pistons and oem gasket.

 

You can't just do 'pistons'. Changing pistons involves full removal and disassembly of the bottom end, machining and fitment of sleeves, and reassembly and installation.

 

I know i was just saying if he wants to fully build the engine! Sleeves pistons and rods.

 

Yeah, but he probably doesn't.

 

It will lower compression to 8.8 to 1.
The new trend on the board is no gasket but they have been proven to make good power.
I think many people that use them do not go the extra step of retorqueing the head after heat cycling the motor. If u get one be sure to re torque.

I myself am going with a 2.03mm sce gasket and um doing my own install.

unsure of cost to install and yes you can drive n/a on it

 

Dam that is low..

Any idea where a 2mm puts you?