I've heard that the F22B, H22A, H23A and other intake manifolds can be bolted right up to the F22A block so I'm just wondering which one is the best to bolt onto an F22A block or if any of them really are direct bolt on? Thanks!
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Best intake manifold/throttlebody upgrade
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Learn to read the stickies and to use the search function. You'll find that 99.9% of your questions regarding your car have been answered already. Check out this thread, it will get you started on performance mods.
http://www.cb7tuner.com/vbb/showthread.php?t=88154
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Originally posted by Sarthos View PostWell I'm glad I didn't buy one then. But is there any difference between the H23 vtec and H23 non-vtec manifolds? I would assume the vtec one would be larger and better but I'm not entirely sure.
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The H23 VTEC is much more like an H22. I don't know for sure, but I would assume the port spacing and bolt patters for that motor are like the H22. The H23A1, USDM only, is the one you are looking for parts from.
The H23A1 intake plenum and throttle body are identical to the H22A. The lower part that bolts to the head is what is different. This upper part (the plenum and throttle body) will also bolt to the F22A6 lower half. Some say it is better... I have not been able to compare directly myself.
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The black box doesn't matter where it comes from.
People have said that the H23 plenum with the F22A6 runners is the best combination. No dyno proof has been provided, so it's all in theory. The difference is probably minimal... and since you'd have to buy both manifolds to make the hybrid manifold, I'd say just stick with the H23 manifold.
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Originally posted by Sarthos View PostOkay, so the H23 manifold has a black box too? Is there like a picture somewhere? And I'd need a new EGR, IACV, etc wouldn't I? Or can I delete some or all of that?
86 4Runner - 22RE 5spd, 4" Lift, 35x12.5R15 BFG Km2's, 4.10 gears
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