Need help with 1.5jz build
- Thread starter suprahero
- Start date
noah89t
get naked & boost a supra
jugodegolf;974725 said:
i'll take the 92 off your hands, you can keep all the new parts. :naughty:
Jay the more i look at it the more im leaning towards a poor tune.
Justin and i were talking about it on a break at work, and the AF's were tune but something may have been wrong with the timing map
Justin and i were talking about it on a break at work, and the AF's were tune but something may have been wrong with the timing map
My car was tuned by a trained professional and it ran perfectly with his wideband and mine so I don't think it was the tune. My timing map was messed up according to Aaron, but now it's right even though it doesn't do me any good. I'm still not sure which route I'm going to take, but I'm not giving up.......yet!!!!
George, I've got my eye on a Baltic Blue '94 with a T67 already installed.
George, I've got my eye on a Baltic Blue '94 with a T67 already installed.
J: Ok if you're sure it's never leaned out on power that narrows it down some.
Bent/stuck/incorrectly adjusted valve is my guess.
Can you post your fuel and ignition maps?
(hi res screenshots will do)
Bent/stuck/incorrectly adjusted valve is my guess.
Can you post your fuel and ignition maps?
(hi res screenshots will do)
suprahero;975079 said:
Don't think you'd be happy any anything other than your car, Jay. You still owe me a rematch...let me know how the lesson went.
I find it hard to believe it was the tune...car ran too well. IJ might have it right.
George: This is why I asked to see the maps, all this speculation is useless without some data/evidence to go on.
IJ.;975118 said:
Jay sent me a copy of his tune file, nothing looks out of whack, but I think the copy he had sent me was post Aaron changes....
Mark: I'd like to see the maps in use when it died.
Anything else is useless.
Motor's don't just eat parts for no reason and it would be nice for J to have a 100% answer so it doesn't happen again.
Anything else is useless.
Motor's don't just eat parts for no reason and it would be nice for J to have a 100% answer so it doesn't happen again.
IJ.;975130 said:
+1 and valves aren't stronger then forged pistons
A aggressive tune (500whp @ 17 psi with a 35r sounds aggressive) + some weak gas from the trip = boom
Here is a pic of the GE head: http://www.clublexus.com/gallery/data//500/medium/IMG_0045.JPG
Now here is one of the GTE head: http://www.clublexus.com/gallery/data//500/GTE_combustion_chamber.JPG
The point im getting at with these pics is that the 1j, im certain, is different as well; I just dont know the specific measurements.
I dont have any pics of the 1j CC but from what I have read on other threads it is a bit smaller. I also dont know the deck height of the motor Jay is running, but it would be pretty easy to measure the valve protrusion and compare it to the deck height of a piston at TDC to see if it was possible that the valves struck the pistons.
This should be a non-interference motor, right? Im leaning away from a mixture problem because the damage looks pretty consistent. Im putting my money on the valves just BARELY hitting the edge of the pistons when the rpms and heat started taking effect.
Now here is one of the GTE head: http://www.clublexus.com/gallery/data//500/GTE_combustion_chamber.JPG
The point im getting at with these pics is that the 1j, im certain, is different as well; I just dont know the specific measurements.
I dont have any pics of the 1j CC but from what I have read on other threads it is a bit smaller. I also dont know the deck height of the motor Jay is running, but it would be pretty easy to measure the valve protrusion and compare it to the deck height of a piston at TDC to see if it was possible that the valves struck the pistons.
This should be a non-interference motor, right? Im leaning away from a mixture problem because the damage looks pretty consistent. Im putting my money on the valves just BARELY hitting the edge of the pistons when the rpms and heat started taking effect.
p5150;975189 said:
I wonder if Jay was running stock valve springs which could cause valve float at high rpms......
The guys at the machine shop tested the springs and said they were as good as new.........:dunno:
Try this link out for the tuning files.
www.msnusers.com/tuningfiles
I don't know if that link works for you guys or not, but click on the documents and see. I'm having problems with it, but I'm trying to solve them.
Try this link out for the tuning files.
www.msnusers.com/tuningfiles
I don't know if that link works for you guys or not, but click on the documents and see. I'm having problems with it, but I'm trying to solve them.
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