are "jspec" and "usdm" t2 motors the same?
#1
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are "jspec" and "usdm" t2 motors the same?
other than EGR, and other small bits, arent Jspec motors generally the same?
are the internals the same?
trying to settle a dispute
are the internals the same?
trying to settle a dispute
#4
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Originally Posted by First gen man
manifolds, emmisions and intercoolers are different...
Here a full list of the engine differences:
No non-turbo engine
No EGR (S4)
No AWS
No sub-zero starting assist system
No pre-cat
Different ACV with no split air solenoid
FPR and PD in opposite locations
Twin-scroll actuator on opposite end of exhaust manifold (S4)
No thermovalve on TB
Last edited by NZConvertible; 11-08-05 at 01:12 AM.
#5
i'm pretty sure that the s5 engines from japan also do not have egr (i was under the impression you were saying that s5 jdm engines do have egr) can someone confirm that none of the jspec engines have egr valves? it ain't really important anyway since you just get a block-off plate right?
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Originally Posted by therotaryrocket
i'm pretty sure that the s5 engines from japan also do not have egr...
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#8
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No, the thermovalve has nothing to do with cold start or idle. I think you're getting confused with the thermowax. The thermovalve is attached to the thermowax and is responsible for holding the #2 secondary throttles shut until the engine warms up, to stop idiots romping on a cold engine. J-spec engines have the same thermowax, just without the thermovalve attached. Mazda obviously trusted Japanese drivers more...
#9
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Originally Posted by NZConvertible
Other than not having fittings for the EGR, AWS and sub-zero start injector, and being short one vac nipple, the manifolds are basically the same (i.e. everthing is exactly the same size). And other than what's written on them, the intercoolers are identical.
I was under the impression that the J-spec have a sharper bend in them. and about the intercooler thats what I meant, from 13b turbo or w/e to rotary turbo with intercooler
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Originally Posted by First gen man
I was under the impression that the J-spec have a sharper bend in them...
...and about the intercooler thats what I meant, from 13b turbo or w/e to rotary turbo with intercooler
Originally Posted by SureShot
I had heard that some of the J-spec IC's had bigger core tubes...
Last edited by NZConvertible; 11-11-05 at 04:36 AM.