Stock internals...How much can they take?

[adaman]

Hey guys, I was wondering how much psi the stock internals can take. As well as how much hp the tranny can take?

[TheCarGuy2021]

It's not a matter of psi that limits these engines, but power. Generally ~500 is the safe mark with a head gasket, some say 600. It all depends on the tune. There are many in the high 400's, even in the 500's with stock transmissions without problems.

[02serv]

my girl is buying me a s2k for xmas so what you are saying a I can make 400whp safely with just a headgasket. what about injector size and anything else I might need

[dezignpro04]

Originally Posted by 02serv

my girl is buying me a s2k for xmas so what you are saying a I can make 400whp safely with just a headgasket. what about injector size and anything else I might need

Depends on set-up. Going NA wont get you those numbers. So if you fo FI (Super or Turbo) you will want to throw on some 450 - 550 cc injectors or you will starve the motor of its much needed "gasolina". Otherwise with IHE, a valve job, port & polish and some other minor work on an NA motor the most you will probally get is 300 @ the wheels. And that is with great tuning as well...

Hope that helps....

[dezignpro04]

Originally Posted by TheCarGuy2021

It's not a matter of psi that limits these engines, but power. Generally ~500 is the safe mark with a head gasket, some say 600. It all depends on the tune. There are many in the high 400's, even in the 500's with stock transmissions without problems.

Maybe a stock tranny but not a stock clutch. Stock S2000's are known for clutch fade with numbers that high.

[02serv]

I was gonna go with the inline pro kit so I would need to also get a headgasket and injectors to safely be able to have a 400whp weekend car

[TheCarGuy2021]

Originally Posted by dezignpro04

Depends on set-up. Going NA wont get you those numbers. So if you fo FI (Super or Turbo) you will want to throw on some 450 - 550 cc injectors or you will starve the motor of its much needed "gasolina". Otherwise with IHE, a valve job, port & polish and some other minor work on an NA motor the most you will probally get is 300 @ the wheels. And that is with great tuning as well...

Hope that helps....

Shooting for 400whp will require a lot larger injectors than that. I'm running 875cc injectors for 450whp.

I/H/E, valve job, port&polish and other minor work will not net you 300whp.

Obviously the clutch will need to be changed, my OEM clutch slipped at 300whp when I used to be supercharged.

Plan to spend a lot more than anticipated to make this car into a reliable turbo car.

Here is my setup engine wise +- whatever I forgot.
›› Garrett GT3582R
›› Custom Lovefab GT1 tubular manifold
›› AEM 1052 EMS
›› InlinePro 3mm head gasket
›› Lovefab 4" down pipe
›› 3" test pipe
›› Custom 3" single catback
›› Custom intercooler plumbing
›› Boost logic turbo blanket and a lot of other insulation products
›› Precision 600 intercooler
›› ARP head studs
›› Comptech reinforced differential with Puddymod solid steel sleeve
›› Exedy hyper single 6 puck clutch
›› AEM boost control solenoid
›› Tial 44mm wastegate
›› Apex'i race blow off valve
›› Science of Speed 70mm throttle body
›› Walbro 255 fuel pump
›› AEM fuel pressure regulator
›› Siemens 875cc injectors
›› Krank vents
›› Buddy club SECU turbo timer
›› AEM UEGO wideband
›› AEM tru boost
›› AEM Oil press
›› AEM 3.5 bar map sensor
›› InlinePro oil filter relocation
›› Auto meter fuel rail mounted fuel pressure gauge
›› Anodized blue powdercoated valve cover
›› Anodized blue fuel rail cover
›› Optima yellowtop battery
›› ARC gradiation spark plug cover
›› NGK 7173s
›› Updated banjo bolts

[02serv]

thanks for the info I was not wanting to open have to do internals like rods and pistons this is just gonnna be a weekend car.

[TheCarGuy2021]

Aftermarket pistons are not compatible with our OEM sleeves anyway. We have fiber reinforced cylinder liners, aftermarket pistons will chew them up. In order to swap internals you must re sleeve the block. We do have forged internals from the factory, and with lower compression, they can take a beating.

[02serv]

yeah I was gonna get the inline pro 3mm headgasket along with a upgraded pump and probly 750 injetors when I order the kit from what I read that should be enough to handle the 400 I would like to get a least