Well, I found the limit for a stock head gasket.

GrimJack

GrimJack

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20psi on a 57trim CT26 does not play well with others, unless they are entirely metal. 5 out of 6 of the cylinders had pushed the gasket out into the water jackets. Pushed enough pressure into the cooling system that it blew my rad hoses.

Tore it down today, if I'm lucky I'll have it running again in short order, as in a couple days. Now my back hurts from bending over the engine bay all day!

Oh well, luckily a head gasket really isn't that much work on the Supra.
 
Mk3 TurboS

Mk3 TurboS

No not a "Turbo A"
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Three cheers for 20psi on a stck HG! hip hip hooray! Just out of curiousity did you have arp studs or stockers torqued down?
 
C

clifftrail

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Thats funny, I did the same thing at the track last weekend. Pushing 18 through a SP61Gt on the stocker. Warped all six rings on the gasket and blew coolant through 3 of them. Made an impressive white cloud though. Using ARP head studs, torqued to 80ft lbs., pump gas.
 
SupraMario

SupraMario

I think it was the google
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clifftrail said:
Thats funny, I did the same thing at the track last weekend. Pushing 18 through a SP61Gt on the stocker. Warped all six rings on the gasket and blew coolant through 3 of them. Made an impressive white cloud though. Using ARP head studs, torqued to 80ft lbs., pump gas.
Click to expand...


and all the rednecks said "damn man that camaro just died"

lol
grim were u planing on going to the dyno to see what #s u were spitting out, then it took a dump or u just got brave and took it to the limit and then some?
 
Loki

Loki

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I'll have to remember this once I start upping the boost with my 60-trim. Will the car be back together for SupraFest?
 
GrimJack

GrimJack

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Actually, I've been running it at that setting for a while - my usual method is to turn it up until it breaks, then fix it and turn it down some. I had no specific plans to hit a dyno anytime in the near future.

Loki, I'm trying to get it all back together in time for Supra Fest. Might happen, too... the head should be back by tomorrow after work, I'll have the gaskets and parts tomorrow at lunch... the only question is whether I can get it all put together in three nights after work.
 
shaeff

shaeff

Kurt is FTMFW x2!!!!
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so Grim, are ya goin with a Cometic? or another stocker? Some other MHG? whats the game plan? :)

-shaeff
 
YoNkErS87t

YoNkErS87t

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you should be able to get it back together in 3 days no problem. Maybe even shorter depending on how much time you put into it each day.
 
shaeff

shaeff

Kurt is FTMFW x2!!!!
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heh, i'm doing the permatex brake spray + cometic. i spoke with Adjuster (Greg) about it a few weeks back. i have high hopes for my setup lasting :) keep us updated on how that brake quiet works!

-shaeff
 
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Blue87T(Dan)

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Sorry to hear that. I wonder if you might have met the limits of the stock fuel system as well.

That is a lot of boost for the stock fuel set up in my opinion. Would detonation deform the HG in the way you described?
 
GrimJack

GrimJack

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Could be detonation, could be just too much power. I doubt that I'm over the limit on the stock fuel system - my EGT can't be too high, as the pistons are still in prime condition. I've seen pistons in an engine running lean, and mine do not look as though they are getting hot enough to worry about.
 
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