Koyo?

 

 

From what I read the APS motor was untuned and boosting 9psi. Even with a built motor, an engine that is untuned will destroy itself overtime causing all kinds of damage..

 

? The APS kit comes with a plug and play unichip computer. It was tuned and they are notorious for being on the safe side. Read some more.

 

And from what I know every motor is different and responds differently to boost. There is no safe side where that is concerned..

 

What was meant by that(safe) is it is 11.5:1 AFR or lower with timing pulled. Our stock rods suck period! I think I could brake them over my knee. But seriously they are very weak. No FI is safe on our motors. Trust me I know.

 

?????

The man himself said that the engine wasn't under boost and that there was a coolant leak. Are we talking about the same engine?

 

its all about the tuning. when u talk about a certain kit failing, you are talking about blowing a turbo or supercharger or faults within the system itself. blowing a motor is usually due to poor tuning or poor design of a motor (unless your turbo/supercarger blows to bits and somehow makes its way past the intercooler and into the intake manifold). I have faith in the VQ. i also agree that with poor tuning, the VQ can blow easily, but thats with any motor. many of you are right in that an untuned motor is a very unsafe motor. there have been a few on this board who had fully built blocks and blew the crap out of them due to poor tuning. tuning is very key in the FI area. my last turbo car i was running lower boost than a friend who had the same setup. i pushed out more power, and ran that motor for well over 35K miles without any major failures due to proper tuning. he blew his motor a week after breaking it in. the only difference in it all was who tuned the motor. to add on to this, tuning is a never ending process which involves very fine lines. every day conditions are dynamic variables that come into play every second you are on the gas. IMO its honestly more of a pain in the **** to wrench away evey day getting it right, unless your spending the day at the track. But then again, once you get it right and smoke someone, its well worth it, hehehe.

 

(Your friend)Sounds like he retarded the timing too much. With the VQ35 it has less to do with the tuning and more to do with the luck of the draw on how good your stock rods are. I mean that within reason. As long as you keep it between 11.3 and 11.8 to 1. I am around Supra guys day in and day out and they laugh at me with my tuning problems. They'll smoke a plug from pre-det before they'll snap a rod. There are some rules of thumb in FI tuning but physics(f=ma) still rules. We have puiny rods with low tensil strength.
[QUOTE=Profile4]its all about the tuning.my last turbo car i was running lower boost than a friend who had the same setup. i pushed out more power, and ran that motor for well over 35K miles without any major failures due to proper tuning. he blew his motor a week after breaking it in. the only difference in it all was who tuned the motor.[QUOTE]

 

good point. however, you must not forget difference between the supra motors and ours is that they were engineered to handle boost. our motor was designed with low weight and better efficiency in mind, not FI. with my previous post my intention was to point out that all other things being equal (we both had forged pistons and rods) that tuning was the key. some people with a stock VQ will blow their motors before others with the same setup. thanks for the insight tho =) and although i like to think my friend is retarded at times, his timing was actually advanced wayy too much and he detonated the crap outta his motor.