Difference Between A Stock NA 90 T2 and A JDM
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Difference Between A Stock NA 90 T2 and A JDM
What are the differences between a JSPEC JDM engine and a stock NA 90 T2. A car I bought had a jdm engine and I'm wondering for ease of maintenance if I should go back to stock NA. What are the differences between the engines and the components on the engine. If there is a FAQ on this topic, could someone direct me to it?
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Okay, lets see if I can clear this up. I have a 1990 T2 JDM engine installed in my 1990 Mazda RX-7 T2. I need to replace it. I'm wondering if I should replace it with another JDM engine, or a normal United States 1990-1991 Turbo 2. What will sway my decision is comapatability of parts. Sya I need a water pump and wonder down to the ole parts gettin' place and say give me one. My question is will there be problem getting parts like water pump, clutch, spark plugs etc.. Or can I use normal 1990-1991 T2 parts.
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Everythign inside and out are the same except for the following:
-wiring harness...obviously if the jspec is in your car you are using a US harness
-no AWS valve or hoses on jspec
-I am almost certain jspec has no ASV valve or hoses
-jspec has smaller smog pump and different bracketry for it
-jspec has no fan thermoswitch for the aux e-fan in front of t2 and AT models
-jspec throttlebody has a phillips screw for idle adjustment, US has a flat setscrew with an 8mm locknut
-jspec BAC valve does not have an idle air bypass adjustment for idle fine tuning
-jspec LIM has the brake booster vacuum outlet on it, US UIM has the brake booster outlet on it
Essentially they are the same thing. There is no performance or parts availability difference between them.
-wiring harness...obviously if the jspec is in your car you are using a US harness
-no AWS valve or hoses on jspec
-I am almost certain jspec has no ASV valve or hoses
-jspec has smaller smog pump and different bracketry for it
-jspec has no fan thermoswitch for the aux e-fan in front of t2 and AT models
-jspec throttlebody has a phillips screw for idle adjustment, US has a flat setscrew with an 8mm locknut
-jspec BAC valve does not have an idle air bypass adjustment for idle fine tuning
-jspec LIM has the brake booster vacuum outlet on it, US UIM has the brake booster outlet on it
Essentially they are the same thing. There is no performance or parts availability difference between them.
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#8
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Any one got a pic of the jspec uim and lim? Im curios about how some of the stuff is routed and/or pluged.
example: no AWS valve. so where does that hose go? Is the port for the split air blocked off? Welded shut? What about the ACV how does it function on the Jspec? Just wondering about how well the intakes would work for emmisins removal..
example: no AWS valve. so where does that hose go? Is the port for the split air blocked off? Welded shut? What about the ACV how does it function on the Jspec? Just wondering about how well the intakes would work for emmisins removal..
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example: no AWS valve. so where does that hose go?
Is the port for the split air blocked off? Welded shut?
What about the ACV how does it function on the Jspec?
Just wondering about how well the intakes would work for emmisins removal.
#15
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Jspecs have had some weird stuff on them. They seem to differ between cars more than US ones do.
Mine is missing a few thins as well. I kind of prefer them over US manifolds.
Less things to remove/block off.
I also like the placement of the brake booster vacuum port. On the LIM versus the pain in the *** to get to bottom of UIM section
Mine is missing a few thins as well. I kind of prefer them over US manifolds.
Less things to remove/block off.
I also like the placement of the brake booster vacuum port. On the LIM versus the pain in the *** to get to bottom of UIM section
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immanuel__7
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09-05-15 10:23 AM