max hp on a stock sr hg???

[da40]

im about to tune my sr i have all the need to have bolt ons im running the gt28r bb turbo from the s15 and im gonna get it tuned with a mapecu alot of supra guys use it and seam to have great success with it,my question is im lookin to make more then 300hp and was wondering if i need to get the head gasket replaced..how much can the stock red top hg take??thinkin about maybe going with a cometic or greddy mhg if i need to change it ill get arp studs and greddy ras if i have to go ahead and do the head job thanks in advance

[240TweakerNewbee]

Ive got the same setup. The best you are going to do is about 260WheelHP with that turbo. Any more boost than what is required for that HP number and youll be risking a spun bearing. At that boost you shouldnt need to upgrade the headgasket.

Ive been running that setup for about a year, and its been reliable.

[da40]

how many psi's are u pushin to get that hp number???

[DrifterProdigy85]

im pushing 19psi from the 2871R .64 on the stock HG with an Enthalpy tune. probably roughly 350whp since i dont have an upgraded intake manifold. as long as you dont detonate or overheat the engine, the headgasket should last quite a while.

[virus77]

Ive got the same setup. The best you are going to do is about 260WheelHP with that turbo. Any more boost than what is required for that HP number and youll be risking a spun bearing. At that boost you shouldnt need to upgrade the headgasket.

Ive been running that setup for about a year, and its been reliable.

You can make more power than 260whp with that turbo and what does boost have to do with spun bearings. Anyways, Ive been running a stock head gasket for 30k miles now, ~100 miles a day in S. Cali heat and shes still holding together.

[da40]

thanks for everyones 2 cents guys that kinda hepls me out

[nzmoman]

You can make more power than 260whp with that turbo and what does boost have to do with spun bearings. Anyways, Ive been running a stock head gasket for 30k miles now, ~100 miles a day in S. Cali heat and shes still holding together.

its not the external heat that matters its the internal... actually the external heat helps because heads dont warp as fast when temp changes are not as extreme. that means having a 100 degree day outside means your engine will not cool down too fast and your gasket will last a bit longer.

Head gaskets fail because of pressure, poor tuning, extreme temp changes(overheating and head/block warping), age and improper installation. You probably want to gauge based on that. There are several people running stock head gaskets making well over 300 whp. the efficiency range for that turbo is around 20 psi measured more than likely on a car running flawlessly with controlled intake temps. of course people can go over, but thats where the factory says you're gonna start having some issues with reliability

240tweekernewbee, what kind of drivetrain mods are you runnin', cause your either loosing power to your drivetrain or you should modify your setup. A bbt28 will make more power than that fairly easy. the s14 turbo will get you around 270+ if you take your time and set it up properly and plenty of people have run 250+ on t25s at high boost

[da40]

make alot of sense..thanks nzmoman

[DrifterProdigy85]

MA Motorsports, Best 240 shop in my area. They run the stock headgasket on there KA-T drift car. They run 24psi from a T3/T4 57 trim i believe.

[nzmoman]

thats pretty Swanky!

[highmilehatch]

Ive got the same setup. The best you are going to do is about 260WheelHP with that turbo. Any more boost than what is required for that HP number and youll be risking a spun bearing. At that boost you shouldnt need to upgrade the headgasket.

Ive been running that setup for about a year, and its been reliable.

My god. That is the biggest bunch of BS I have read in a while. Please do yourself a favor and stop spreading false information.

300whp is easily attainable with that turbo. Now, by your logic, 10 psi on the GT28R is too much boost. ???

260whp will not spin bearings. In fact, HP does not spin bearings. It has nothing to do with it. Incorrect engine assembly, poor oil circulation, or over-revving can spin bearings.

To the original poster, you'll be fine @ 300whp. Now if you want that power to last a very long time, I suggest getting some engine management and good tuning.

[PantherRacer]

ehhh
Modified by PantherRacer at 10:50 PM 7/23/2006

[da40]

so u think i should get a mhg done on the sr im just shooting for 300hp for now out of mysetup probably gonna shoot for 15-18psi i plan to get the car tuned with my mapsecu and ill also get some things as far as to cool the car down alittle bit more,i just kinda want to know about how much hp my hg will take as long as im not leaning out and my engine temps are good thanks guys again

[virus77]

Id say for 300 u are fine on the stock gasket.

[da40]

thanks for the info