head gasket and max boost

[s7mgte]

i was wondering what the max boost i could push in my 88 supra with stock internals and a 1.4 mm titan motorstports metal head gasket. also im putting arp head studs in it and i was wondering if the motor has to be lowered in order to get the head over the studs once installed..thanks

 

[spoolint78]

very broad question.
all depends on the turbo, head torque specs, prep work.

all in all, its basically all in the tune with sufficient race gas, with no detonation and you will be good.

The studs can be installed first, then the head can be dropped onto it.

 

[jdub]

Max boost? Till she blows

It's easier to drop the head on to the index pins, then thread the studs in from the top. Put the washers in each stud hole 1st and finger tight the studs. Torque to the ARP spec (80 ft/lbs) in increments per the TRSM pattern.

 

[starscream5000]

100 psi .

 

[hellraiser456]

if just a stock ct 26...you can push as much as possible until fuel cut. usually will be around a bar give or take. keep in mind though that the ct26 is only really good unlit 14 psi..after that its just plain useless

 

[s7mgte]

i have the upgraded ct 26 with a garret t4 60-1 trim. whats max boost till she blows with that?

 

[futeki_supra]

20935923486 bar

 

[Fletch124]

You will hit fuel cut at like 9psi with that turbo. Until you get a fuel regulator, piggyback, and bigger injectors you should be no real real danger of blowing your headgasket. But if you were to not correct install your MHG then 9psi could definetly do it.

 

[s7mgte]

You will hit fuel cut at like 9psi with that turbo. Until you get a fuel regulator, piggyback, and bigger injectors you should be no real real danger of blowing your headgasket. But if you were to not correct install your MHG then 9psi could definetly do it.

im talking about yeah if i have all that im gonna get it soon.. im getting the piggy back and fpr n pump injectors and all.. whats max boost then without blowing?

 

[jdub]

You will hit fuel cut at like 9psi with that turbo. Until you get a fuel regulator, piggyback, and bigger injectors you should be no real real danger of blowing your headgasket. But if you were to not correct install your MHG then 9psi could definetly do it.

Fuel cut has nothing to do with the size of the turbo other than the amount of air it is capable of pulling through the AFM. The AFM determines fuel cut by the volume of air it senses...period. On a stock AFM, fuel cut will occur ~12 psi...with a Lex AFM it will happen ~18 psi.

A MHG properly installed will hold 25+ psi easy. Of course, other things in the motor might break.