what to do with my head

[droptopgst]

I have a 98 gst spyder with a bad head gasket. I have 98,000 miles on it with intake, 3" turbo back exhaust, boost controler, bov, icp. My question is what do you guys think I should upgrade or what work should i have done while the head is off. The valves are loud as hell now and not sure if I should take care of them now or not. I am looking for low 12s or high 11s in the 1/4. let me know what you guys think I should have done. and i also have 90-100psi in each cyl. when i checked it. Is this about right?

other than the head gasket?
1g head, will this help at all?
any port work?
valves so they are not as loud?
decked/planed or what ever they call it and have the thin head gasket

thanks

 

[98TsiAWD]

Originally posted by droptopgst
I have a 98 gst spyder with a bad head gasket. I have 98,000 miles on it with intake, 3" turbo back exhaust, boost controler, bov, icp. My question is what do you guys think I should upgrade or what work should i have done while the head is off. The valves are loud as hell now and not sure if I should take care of them now or not. I am looking for low 12s or high 11s in the 1/4. let me know what you guys think I should have done. and i also have 90-100psi in each cyl. when i checked it. Is this about right?

other than the head gasket?
1g head, will this help at all?
any port work?
valves so they are not as loud?
decked/planed or what ever they call it and have the thin head gasket

thanks

high 11's in a fwd spyder, good luck. Anyway you I think each cylinder should be about 165-170psi with that many miles, however if you have a bad head gasket it would be way off so that might be all that your problem is there. Might as well get a 1g head and port it and put it on while your at it.

 

[markmakeitso]

that compression number sounds about right for a cold motor, not one warmed up. depending on where your head gasket is blown it might only affect 1 cylinder, possibly 2 if it's between cylinders.

 

[CBgst]

If your going to get it ported use the 2nd gen head because they can be ported to flow better than a 1st gen ported head. If going make alot of power later then go ahead and get arp studs and maybe even Ferrera Valves depending on your goals.

 

[larryd]

when my head gasket went I decided to port my 2g head along with the 1g Intake Manifold and TB.. I also put in a crower head package including ss oversized valves, new springs & retainers, and cams while I was at it..