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IS300 intake manifold question

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Old 03-29-10, 04:48 PM
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derekhale
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Default IS300 intake manifold question

my 92 SC3 came with a IS3 mani. will that be a problem when going NA-T?
Old 04-02-10, 05:30 AM
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dejacky
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no, but you will make more power in the higher rev range with a front facing intake manifold and a bigger throttle body. Also, spark plugs will be much easier to change .
Old 04-02-10, 07:52 AM
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Ali SC3
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IS300 throttle body is drive by wire. won't work with the stock ecu.
Old 04-02-10, 09:23 AM
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99SC42
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IIRC the SC TB is even bigger than the IS300 and it will not work because it's BDW you can'r use the Y plenum and the TB and the SC Y and TB will bolt up to the IS lower and upper runners.
I went thru the same that's how i know.
Old 04-07-10, 08:08 AM
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NS-SC400
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My IS300 always felt stronger up high I wonder if changing my SC300s runners out for the IS300 runners would improve the big end pull on the sc300 any opinions??????
Old 04-07-10, 08:46 AM
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99SC42
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The runners are identical the only difference it the TB and the Y plenum, i am using a VVTi lower and upper runner.
You can't use the TB because it BDW , and the IS will felt stronger and pull better than the SC because of the VVTi.
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