4g64

[mysticj]

yeah some 3g owners have swap in the g4js pistons and head

[gaylantvr4]

is there any company that makes stock compression forged pistons?

[seth98esT]

Are you planning on running a 500+whp NA setup? If not, then you shouldnt need them.

[gaylantvr4]

no just keeping my options open

[gaylantvr4]

4G67 heads are cheap when compare with 4G63 heads but the high compression probably would require retard timing, high octane fuel, water/meth injection, enlarge combustion chambers, valve relief cut, thicker HG, or maybe propane injection with a good tune to prevent detonation.

Have you driven the car with the 67 head and g4js pistons? I am going to order them this week sometime. i found a few 67 head at the local salavge yard so i will pick one of them up.

[mysticj]

4G67 heads are cheap when compare with 4G63 heads but the high compression probably would require retard timing, high octane fuel, water/meth injection, enlarge combustion chambers, valve relief cut, thicker HG, or maybe propane injection with a good tune to prevent detonation.

Have you driven the car with the 67 head and g4js pistons? I am going to order them this week sometime. i found a few 67 head at the local salavge yard so i will pick one of them up.

That picture of the g4js piston is from a member from club3g. I have the 4g64 GS with the 4g67 head and stock pistons, and i haven't driven the car yet. My compression should be around 10.6. Suppose to use the stock 260/264 cams which is like $250 from Mitsu if you want to use those "Euro" cams. If you get the 4G67 head be sure to use the 4G63 intake manifold because the 4G67 IM WILL NOT bolt to a 4G63 TB. It cost me 75 bucks for a 1G NT IM and TB and from the looks of it, the NT 4G63 TB look exactly like the GS TB.

[gaylantvr4]

i have a set of jun 264's i am going to use.

[mysticj]

i have a set of jun 264's i am going to use.

are those cams have like 10.5mm lift? make sure those cams won't cause the valves to smack into the pistons.

[gaylantvr4]

it the timeing is set correctly i should have a problem

[mysticj]

what problem?

[gaylantvr4]

what problem?

valves and pistons

[mysticj]

use clay on the pistons, install the head and timing belt, turn engine by hand for a full rotation if stuck then the valves hit the pistons. have the valve relief cut deeper

[gaylantvr4]

i will try the clay trick. I ordered the g4js pistons today along with some arp rod bolts. all i need is some bearing and i am set fo rthe bottem end.