I have a 99 Gs Spyder with the 4g64, I know you can do the 4g63 head swap. But I was wondering if it would run with out boost.. and If any one knows how much boost I can pushwith stock internals. And If any knows of a web sight with a compleat list of parts and steps to do this.. I was also interested in the gsx mod. I read that the spyder and gsx share the same frame and Iv seen a gsx spyder conversions.
(questions I have asked)
1. can a 4g64 run with a 4g63 dohc head with out boost
2. How much boost can can a stock 4g64 block handle
3. lookign for a web sight with parts list and steps
2. spyder gsx mod

 

1. yes you can bolt on the 4g63 head on to the 4g64 block no problem.
2. apx 10lbs before the rings go im pretty sure
3. parts list for what? to make your car boosted?? it's not a cheap process! here are the minimums
- block internals
- turbo
- manifold
- fmic
- ic piping
- bov
- wastegate
- injectors
- fuel pump
- clutch
if you plan on making ur car safe while boosted you'll also need:
- boost gauge
- wideband
- tuning device
- tuning
all together a minimum of about 3000 to boost your unboosted car.
4. you will basically need a gsx shell, the "mod" is concidered gsx trani, axels, driveshaft, rear differential, rear axels. will need a gsx ecu, probably some suspension work for the exta weight... it's a lot of work!!! and a lot of money!!!