Need advice (and probably a motor)
04-06-11, 05:10 AM
#16
Of course I think you would be better off with a 2JZ swap but staying on subject with the UZ I would assume the 2UZ head would flow better. Does it not also have VVT-i? I'd thinking adopting the supercharger to bolt on the 2UZ would be a better option.
edit. the 1uz has a bore of 87.5mm and stroke of 82.5mm, the 2uz a bore of 94mm and 84mm. Correct me if I am wrong but does that not mean you would have to sleeve the 2UZ block deboring it 82.5mm to fit with the 1uz head? The net gain would be only a 1.5mm increase in stroke and an iron block.
edit. the 1uz has a bore of 87.5mm and stroke of 82.5mm, the 2uz a bore of 94mm and 84mm. Correct me if I am wrong but does that not mean you would have to sleeve the 2UZ block deboring it 82.5mm to fit with the 1uz head? The net gain would be only a 1.5mm increase in stroke and an iron block.
04-06-11, 08:15 AM
#17
dude just get a used jspec 1uz from a good seller on ebay for 800 shipped.
this is what i did when i did a engine replacement for a friend of mine with a 92 sc400.
the engine was PERFECT when i got it, and all cylinders were within like 3psi of eachother...
this is what i did when i did a engine replacement for a friend of mine with a 92 sc400.
the engine was PERFECT when i got it, and all cylinders were within like 3psi of eachother...
04-07-11, 05:33 PM
#20
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So I finally got around to putting some air in the #8 cyl today.
Lots of air (a bit of noticable pressure actually) coming out of the crankcase. Sounded like there may have been some in the intake too but not 100% sure. Nothing from the exhaust.
I put air in #1 just to be sure it wasn't normal. Was some air moving but not near as much.
So I guess that either the rings are gone or possible leaking into the crankcase through the head gasket.
Haven't decided what I'm going to do about it yet.
KC
04-07-11, 05:47 PM
#21
As long as spacing on the bore centerlines, and head bolt pattern is the same between engines, I don't see what the problem would be. Engines are bored all the time. Also, bigger bore means unshrouded valves as an added bonus. 
That is one expensive *** shortblock though!
That is one expensive *** shortblock though!
04-07-11, 05:51 PM
#22
What year????
-------------------------
So I finally got around to putting some air in the #8 cyl today.
Lots of air (a bit of noticable pressure actually) coming out of the crankcase. Sounded like there may have been some in the intake too but not 100% sure. Nothing from the exhaust.
I put air in #1 just to be sure it wasn't normal. Was some air moving but not near as much.
So I guess that either the rings are gone or possible leaking into the crankcase through the head gasket.
Haven't decided what I'm going to do about it yet.
KC
-------------------------
So I finally got around to putting some air in the #8 cyl today.
Lots of air (a bit of noticable pressure actually) coming out of the crankcase. Sounded like there may have been some in the intake too but not 100% sure. Nothing from the exhaust.
I put air in #1 just to be sure it wasn't normal. Was some air moving but not near as much.
So I guess that either the rings are gone or possible leaking into the crankcase through the head gasket.
Haven't decided what I'm going to do about it yet.
KC
I hate to even say it, but have you considered an LSX swap? At least it would be keeping to the aluminum V8 roots...
04-08-11, 12:04 PM
#24
You are a different breed my friend. One of few trying to squeeze good power from a 1UZ. Sorry your engine gave up the ghost, but it gave you some damn fine numbers along the way I hate to even say it, but have you considered an LSX swap? At least it would be keeping to the aluminum V8 roots...
I hate to even say it, but have you considered an LSX swap? At least it would be keeping to the aluminum V8 roots...and adding GM roots
You would be surprised on how many people are making good power from 1uz's.... maybe not in the SC crowd since most here are like "JZ JZ JZ JZ JZ" but elsewhere... there are plenty of other vehicles with a 1uz playing with power (swapped).
04-08-11, 06:19 PM
#28
Of course I think you would be better off with a 2JZ swap but staying on subject with the UZ I would assume the 2UZ head would flow better. Does it not also have VVT-i? I'd thinking adopting the supercharger to bolt on the 2UZ would be a better option.
edit. the 1uz has a bore of 87.5mm and stroke of 82.5mm, the 2uz a bore of 94mm and 84mm. Correct me if I am wrong but does that not mean you would have to sleeve the 2UZ block deboring it 82.5mm to fit with the 1uz head? The net gain would be only a 1.5mm increase in stroke and an iron block.
edit. the 1uz has a bore of 87.5mm and stroke of 82.5mm, the 2uz a bore of 94mm and 84mm. Correct me if I am wrong but does that not mean you would have to sleeve the 2UZ block deboring it 82.5mm to fit with the 1uz head? The net gain would be only a 1.5mm increase in stroke and an iron block.
To the OP, I think you should revert to an early thick rodded 1UZ if you aren't going for an all out build. The tune won't be that different so you won't need to change much. You will be able to run more boost with one without worrying about those baby rods you have now. Just be careful with the sparkv advance this time around!
Glad you are sticking with a UZ though. Good luck.
