Whats the difference between (headgasket)

[themadscientist]

if your engine is tuned properly it is not an issue. The only thing that changes with bigger turbos is your margin for error. A metal gasket will stand the abuse of improper tuning longer but if left uncorrected will fail as well.

[float_6969]

if your engine is tuned properly it is not an issue. The only thing that changes with bigger turbos is your margin for error. A metal gasket will stand the abuse of improper tuning longer but if left uncorrected will fail as well.

THIS IS THE KEY TO THIS CONVERSATION!!! As has been said a million times before, it's all about the tuning! Boost doesn't blow head gaskets. Boost doesn't break pistons either. Bad tuning does. The only CA I've ever seen with a broken rod was on one in the UK and the guy was running a single large injector before the TB to compensate for his extra fuel needs. He was running a T3/T4 hybrid at 20ish psi IIRC. His mistake was cheaping out and poor tuning(Greddy Rubic or something of the sort). You can't run fuel though a manifold that wan't designed to flow fuel, with lots of boost, and expect it to turn out OK. He was running some sort of aftermarked HG which held. IMHO, I would have much rather been running as stock HG and had it blow, then run an aftermarket HG and break rods.

I'm running forged pistons, stock rods, stock head gasket, head studs, 9.5:1 compression (It may be even higher than that), and had an SR T25 up to at least 14psi w/o any problems. I'm changing over to an S15 T28 tonight and intend to run as much as 18-21psi (track use) later on down the road. I have absolutely no fear about the integrity of the motor I built, and have every confidence that IF I DO botch up my tuning, the HG will be the first thing to go. At a $40 replacement cost, and a couple of hours of work pulling the head, that's OK by me. Much cheaper and easier than rods or pistons....

[CA19DET]

yes yes, but you got to remember thats a new OE headgasket, not the old one, i have busted HG's ion my DE, and other engines in the past, i'll run a metal one for the peace of mind, knowing the stock one would let out before a metal one..

you also got to remember if a HG goes you can do sever damage anyway, water in the combustion chamber/cylinders, over heating etc...

i'm not saying the OEM HG is no good, just that there is a reason so many companies develop aftermarket HG's, even nissan (NISMO) saw the need for it..

[float_6969]

...you also got to remember if a HG goes you can do sever damage anyway, water in the combustion chamber/cylinders, over heating etc...

This is true, and something that I should have mentioned.

i'm not saying the OEM HG is no good, just that there is a reason so many companies develop aftermarket HG's, even nissan (NISMO) saw the need for it..

And you're right here as well, the stocker has it's place and I'm sure, that a some point, the stock HG just won't hold. But I guess the point that I'm trying to make is that IMHO this point is higher than most people think.

[Akihisa]

What does IMHO mean? I see it on here alot and I can't figure it out.

[float_6969]

Sorry, sometimes I'm a lazy typist. InMyHumbleOpinion

[themadscientist]

I Must Hurt Others

[CA19DET]

perfect example, this weekend, driving hard on my way home with two incredibly hot young ladies listening to Tiesto BOOMING though the Xplodes after a fantastic night partying - was doing about 120+mph down the highway after a party (i swear they were wet between the noise of the car, the speed and the bass vibrating their lil cokies, the goldschlagers, yager bombs - anyway) - part throttle in 5th just going into boost when needed to overtake.. zipped past a couple cars and...

battery light comes on, i'm like ok, alternator belt burst, thats ok, slow down to about 60-75mph - cruise

then 5 mins later i am like oh ****, water temp gauge going up - fast, an I remember the water pump and alternator are on teh same belt, oh ****, and my fans are elec... hmm

so i had another 10 mins drive to drop off one of the hotties and 5 mins to get to my house with the other... (so i took both of them by me instead - lol i WISH and i TRIED LOL)

but anyway, moral of the story is, i drove for about 15 mins with the car HOT, i mean about 200+* after boosting very hard for about 10 mins comming down the rd before. i dont think a stock HG would have stood up there...

and yes i hit it

[boost_boy]

perfect example, this weekend, driving hard on my way home with two incredibly hot young ladies listening to Tiesto BOOMING though the Xplodes after a fantastic night partying - was doing about 120+mph down the highway after a party (i swear they were wet between the noise of the car, the speed and the bass vibrating their lil cokies, the goldschlagers, yager bombs - anyway) - part throttle in 5th just going into boost when needed to overtake.. zipped past a couple cars and...

battery light comes on, i'm like ok, alternator belt burst, thats ok, slow down to about 60-75mph - cruise

then 5 mins later i am like oh ****, water temp gauge going up - fast, an I remember the water pump and alternator are on teh same belt, oh ****, and my fans are elec... hmm

so i had another 10 mins drive to drop off one of the hotties and 5 mins to get to my house with the other... (so i took both of them by me instead - lol i WISH and i TRIED LOL)

but anyway, moral of the story is, i drove for about 15 mins with the car HOT, i mean about 200+* after boosting very hard for about 10 mins comming down the rd before. i dont think a stock HG would have stood up there...

and yes i hit it

Great story and I wish you would've scored with both the hotties as well. But in retrospect to your story, I was at the track yesterday getting my car tech'd to go drag. The guy had me pop my hood and everything underneath checked out okay. He then had me open the passenger compartment up and again everything checks out okay. He then had me pop my trunk and immediately, he started looking at the battery and the kill switch.

He then told me to crank the car and tried to turn off the kill switch and for some reason or another, the car didn't turn off. They then started giving me smack about my open battery tray (the same set-up I've always used at the track) and telling me that I need to go buy a $100 battery box from the booth about 25ft away from the tech station. All the while my fans were never hooked-up to their relay because both fans function together and I need all the power I could muster up to crank the car.

While we're sitting there arguing for about 10 minutes, my friend tells that there is smoke coming from under my hood. I checked my hand held programmer from the SDS and the temperature was @230*F and mind you, I have a re-used AJUSA stock headgasket with copper spray all over it and the car idled at 21HG @ 900rpm. The moral of the story is that the stock headgasket is a little better than you give it credit for being. If anything, the aluminum head will start to distort and/or warp if it gets too hot, but I'm not eager to let my car get this hot anymore.

Dee