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2jzmk3
Guest
Ric said:I think a 2JZGTE head on a 1JZGTE with cams, porting, etc... would be amazing.
I have my reasons to love the 2.5 liters of a 1JZGTE, just the simple smooth power and good sounding motor mainly, but the 1JZGTE head is something less desirable when it comes to choice of aftermarket.
Sure yeah, I could port the fuck out of it, get special order cams, custom made intake manifold, etc....
Or I could get a stock 2JZGTE head with 264 cams, a nice aftermarket intake manifold, dime a dozen fuel rails, etc... and revv the PISS out of the 1JZGTE with a nice 74mm turbo and run 9's all day long with the autp and a 3500 stall with 2step.
Then again this setup isn't really needed either, as it's proven the 1JZGTE can make over 800whp with basic head work.
The guy that did 850whp on his 1JZGTE with a GT45 turbo on 30psi with no nitrous, is right on par with 2JZGTE's. In fact, he was the highest HP car at the supra meet. A GT45 turbo is comparable to a T78, and on a equally built 2JZGTE, a T78 also does around 850whp @ 30psi.
First of all this is Mark Conte from supraforums, not Sean.
I had to come on here because we have some assinine comments going on from someone who has no damn clue of what they speak.
First of all, shut up. You have no idea what 2JZs do with GT45 turbos. Let me help you.
Tony's 78mm (normally they are 80-81mm, this is a PTE hybrid) - at 33psi made 930whp spinning
http://www.supraforums.com/forum/showthread.php?t=432880
Kareem's GT4508R modified into the smaller housings (less airflow) made 1051 SAE in front of a few hundred Supra owners.
A local car with a 45-78 hybrid also made 962 on a fresh motor without leaning on the boost controller or timing.
Furthermore, the turbo on the car you're talking about wasn't a GT45.
Also, what are you talking about a T78 is the same as a GT45, you're so unbelievably wrong it hurts my brain. You know nothing about turbochargers, and actually you know nothing about the car that you're talking about.
A T78 is a 66mm turbo and will not even approach 850whp, in fact it wont even make 850hp at the engine.
Now that we've gone over everything you've said that is blatantly wrong, how about you go ahead and discuss the performance benefits of a 1jz over a 2jz. RPM? RPM is what you have to do when you don't have displacement. All that RPM does is create higher piston speeds which means you must accelerate the intake charge to keep up with the piston in order to negate the precipitous fall off in volumetric efficiency that happens when the piston outruns the intake charge. Something you obviously don't understand by your eloquent plan of 'porting the fuck out of it' because when you oversize a port you lose intake velocity. It also means that you need a more aggressive camshaft - usually longer duration - so the valve is open long enough to injest adequate air to fill the cylinder, this is also a detrimental situation due to the fact that at low RPM the dynamic compression ratio is sacrificed and low end torque suffers. It also means the car will not idle very well due to the lack of vacuum from the cams.
Of course your lack of understanding doesn't stop there. You discuss aftermarket intake manifold having no idea that these oversized throttle bodies that every aftermarket intake manifold use further hinder drivability and tip-in throttle due to the fact that a larger throttle plate when cracked allows a larger amount of air into the cylinder and it is difficult to control a large injector in these conditions, not to mention the additional resolution you would want to have to attain good driving characteristics.
All in all, do not speak to things you do not know. Everyone learns, I learn new things every day, probably some things I could learn from you. But you speak as if you've 'been there, done that' and via your amazingly articulate posts with such engineering gems like, "revv the PISS out of the 1JZGTE" it's quite obvious that you haven't been there, nor done that.