So im thinking of placing an order for a full-race turbo kit what do you guys think will be safe hp wise without changing the headgaskit

 

On a stock head gasket depending on the turbo you go with, at 10 psi being your max i would say 400-425 whp

This prob belongs on the FI forum

 

i was guessing around 380 or something you think is fine if i take it to really low 400s

 

This manifold is so efficient that it will make 400 plus with no problem on a stock head gasket
why do you want low 400 ?
I'm sure at like 8 psi you could make 380 whp if thats what you want.

 

This thread belongs in the FI forum.

 

S2000 owners are lucky. the stock bottom end is really strong. infact it's suprisingly strong and CAN handle FI.. BUT any time you run boost on the stock compression. man you're asking for it to blow up. Spend the extra cash and knock down the compression.

Honestly, after ordering the full race kit, having it installed, the whole 9 yards, GOOD LUCK. First of all, plan to wait at least 4 months to get it AND have nothing fit right.

You'll probably want to change the oil squirters when you tap the oil pan, be prepared for NOTHING to just "bolt" on because it doesn't, modify all the coolant/heater lines that run near the fire wall, and make a heat shield so you dont melt all of them once they are modified.

also, for some reason, they sell their GT kit line without a water cooling kit. SO, the turbo is only oil cooled. i believe you always want the GT turbo's to be oil AND water cooled.. not one or the other.

the overall craftsmanship of their manifold is top quality. after owning their evo VIII manifold, i was sold for life.

As far as power. that all depends on the type of dyno you're on. Try to keep the boost as low as possible until you can afford the head gasket.. or just do the head gasket and run ~15psi that should be good for close to 400 on a dyno dynamics (even on 91). i mean you're spending like 5G's on the kit. haha what's an extra 300 to pull the head ! GL