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Thread: STRATTON's OFFICIAL MOTOR BUILD !!

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Posts: 81-90 of 111
2010-05-20 23:11:14
#81
Originally Posted by STRATTON
no on the dyno. it started smoking once they tried to raise the boost.

rockwood i was not there when it was getting tuned so i have no idea what the egts were.

stratton.



Did you beat this motor prior to getting tuned with the new turbo?
2010-05-20 23:16:12
#82
well, i beat the motor since the day it got it running for about 4 years.

rob, after the turbo install, i surely didnt take it easy on it.

i had a ton of wot runs.

stratton.
2010-05-20 23:55:30
#83
yeah, probably just started going lean or going past the efficiency of the turbo and got hot. If you want to push your power the the limits that your looking for you really really might consider a water/meth injection. Its gonna be the only way to keep the pistons cool enough when backpressure starts to really get high when at the limits. Otherwise you will end up detonating your brand new forged pistons and melting those as well.

Trust me Strat, i know all about pushing the t2 turbos to their limits. Even my a/f was dead on and timing was a base 15 deg with only 21 deg up top and it didnt matter. it still got hot, still detonated the lands out and melted pistons.

Water/meth will keep your egt's down bigtime and cool the tops of those pistons to keep detonation away and keep from disaster from happening.
2010-05-21 00:06:17
#84
i say put the baby turbo back and enjoy the car.. yea big numbers are cool but you lose the enjoyability once you take a nx past 400hp.. all you have is torque steer.. after roaming the turbo thread i have come to realise the bang for the buck is all motor..
2010-05-21 00:17:25
#85
Originally Posted by ashtonsser
yeah, probably just started going lean or going past the efficiency of the turbo and got hot. If you want to push your power the the limits that your looking for you really really might consider a water/meth injection. Its gonna be the only way to keep the pistons cool enough when backpressure starts to really get high when at the limits. Otherwise you will end up detonating your brand new forged pistons and melting those as well.

Trust me Strat, i know all about pushing the t2 turbos to their limits. Even my a/f was dead on and timing was a base 15 deg with only 21 deg up top and it didnt matter. it still got hot, still detonated the lands out and melted pistons.

Water/meth will keep your egt's down bigtime and cool the tops of those pistons to keep detonation away and keep from disaster from happening.


^Sound advise right here Water injection is a good answer from keeping detonation from happening again.
2010-05-21 00:43:34
#86
and that goes with any turbo. When your backpressure starts to get more than the boost level your running you will start to run into piston heat soaking problems. This is most apparent on T2 applications and thats because the manifold, wastegate and turbine housing on the smaller turbos can only flow soo much power. So when there is nowhere else for it to go it will stay in the cylinders and heat the pistons up quick. Doesnt matter if your a/f and timing is conservative. It will still get hot and melt things.

I tried and tried and tried with the t2 turbos and figured if i wanted big power then to go with a big turbo that was meant to handle it and flow it. That included a manifold and external gate.

When you get to the limits is when problems happen. If you want this motor to last long at big power you need to use water/meth or go with a t3 turbo.
2010-05-21 00:45:01
#87
ashton, thanks for you advice.

i will most certainly not run water/meth, if thats the case ill lower the boost in turn lowering the temps.

i believe 380-400whp on the weekends is more then fine for a fully built motor. the car ran and i hope runs extremely cool, coolant temp wise. i know alot of people running 718r .86's internally gated, on 18-20psi with no problems on pump.

there was absolutely no detonation marks on the pistons at all.

could be the ring land just gave out. well never know.

what i do know is it will be built, it will make power and i will drive the piss out of the car till some one buys it.

if not ill drive it till oct then its off the road.

if i had the time and the extra cash i would have scrapped this whole turbo idea and built the nastiest srxxve this side of the world has ever seen. but things happened and i truely belive my car loves being turbo lol. tj, i been telling you to stay all motor since the day you got into a nx. bang for the buck is always turbo, but n/a in my eyes is less of a headache and cheaper in the long run. boost is addictive lol.

harness is all cleaned up and taped up, tomorrow is loom, picking up my rods and pistons and its back to working on the car at jmr.

stratton.
2010-05-21 01:18:03
#88
Actually the problem is the timing when you get into full boost and leaning the the mixture via SAFC if you have to take out a lot of fuel to tune via SAFC you are also adding timing on those spots were you are removing fuel.... Since whenever you use negative #'s on the SAFC actually you add timing to the ECU too... for your knowledge... the piston crack the ring land when it sees detonation period... when you have the timing too advanced on the timing map when the motor hit full boost or at peak torque.... or at peak hp too.... you can have the AFR's on the perfect spot ans still crack the ring lands on stock pistons because of over advanced timing....

And as a comment for your build use either Mazworz ARP's or GE try not to use the regular ARP's and as of the head gasket even the OEM one should be fine for your goal...
2010-05-21 01:49:39
#89
Originally Posted by STRATTON
well, i beat the motor since the day it got it running for about 4 years.

rob, after the turbo install, i surely didnt take it easy on it.

i had a ton of wot runs.

stratton.



This is why I always say regardless what is done to a motor it should always be tuned right away.

It could have been hurt already or it could have been a tuning error.

Promise me your new motor will be tuned before you even bring the motor into boost.
2010-05-21 01:58:23
#90
payu thanks for your opinion.

rob, yes well get it running, give it a base tune. break it in 'ugh' and then once thats done go back re-tune it for higher boost.

stratton.
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