stevo the tune is perfect it runs realy nice . on the street it was going sweet but at the drag's i didnt get to enjoy the car has first run she shat her self on the start line :(
my t50box has a hd clutch and different flywheel .its not a daily just a fun car ( was ment to be a cheap fun car lol )
is your motor stock stevo?

i have a water inj setup for the sr20det ute maybe might borrow it .but then again i dont wanna touch the tune has i cant fault it

yer seen some pic's of flywheels letting go arrr !

cheers for all the info guys still realy keen to hear form people that have ran turbo a12/14/15's for a while and wat they recomend :)

have to disagree with your veiw's on skylines there neil newish jap cars are very thrash friendly :)

g'day mate. if your serious give me a call. number is in my profile. dont waiste your time and money with head studs unless you insert the pistons to handle it

cheers dude ill give ya a buzz on the weekend

Quote:

Quoted for posterity when the first second and third things break and cost alot more to fix

lol

Ive been running 12 psi through a 20,000 km old standard a12 (standard head gasket) for nearly 2 years it puts out 106hp I've had no troubles with it the motor just changed out first broken diff this week. its probably done 6-7000kms with turbo on it now. I had it at the drags about a year ago with a 3.7 diff in it it only got 15.6 sec 134 kph in 3rd gear @6800 revs I couldn't get it off the line quick because the clutch would slip or wheel spin
You should keep it and spend some money on a tune I got mine done at Ova boost in Malaga

Cheers Brad

What sort of compression ratio are you running? It mightn't be combustion pressure that blew the gasket, it might be detonating, in which case, you'd actually 'want' the headgasket to be borderline, so it acts as a fuse before you do more permanent damage to the engine. Which would mean the 'real' answer would lie in dropping the compressoin ratio down to a safe level.

Problem can occur where it's detonating, but it can't be heard over the noise of the engine/turbo in general. This _might_ be happening (and I'd tend to worry that it might be if it is a std engine/std compression and 10psi on top.An a12 (by virtue of smaller bore) would be relatively less likely to detonate at the same boost/compression ratio, even more so depending on chamber/piston shape))

Personally, I'd try just a new std gasket on there and running water injection, and see if the head gasket holds up. If it still lets go, it's a gasket/clamping issue, not detonation. A relatively cheap way to test that out without risking breaking bottom end parts.

what are you running to control the spark?

havn't heard any detonation/pinging

the motor is outta a stock low milage sunny but the motor sat for a few years befor start up so maybe the head gasket went hard n brittle :?

fuel is control'd buy a micro tec boost is set from the wastegate actuator spring the spark is dizzy n coil setup ( stock) motor doesn't rev super high has its stock

thanks guys im leaning more to keeping it now still heaps to learnn