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Old May 2nd, 2017, 05:30 AM   #1
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Intake manifold spacer questions

I'm sure this has been answered but I am new to the forums and the search didn't give me what I was looking for. Can anybody tell me specifically what I will need for this mod? Space, gasket, and longer bolts is my understanding? Also, if you could supply part numbers or where to get them I would appreciate that. Thank you.
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Old May 2nd, 2017, 08:08 AM   #2
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1 of these:
P2R J Series V6 Intake Manifold Spacer

And 2 of these:
2003-2012 Honda Accord V6 Thermal Intake Manifold Gasket

The spacer comes with the bolts.
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Old May 2nd, 2017, 03:40 PM   #3
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Awesome thanks. The bolts was the part I was unsure of. This will fit with not milling ?
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Old May 2nd, 2017, 05:09 PM   #4
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No milling necessary. Unbolt the intake manifold from the runners, and the spacer goes in between the manifold and runners. P2R has pics in the link I sent you above.
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Old May 4th, 2017, 06:19 PM   #5
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Check my post out in the 7th Gen Performance section.

If you are doing the spacer, you might as well do the manifold and throttle body along with it. I am presuming you have a CAI?

http://www.v6performance.net/forums/...ttle-body.html
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Old May 6th, 2017, 04:48 PM   #6
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That manifold spacer is a waste and the only gains are from the full sized one.
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Old May 7th, 2017, 12:45 AM   #7
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Quote:
Originally Posted by nick650 View Post
That manifold spacer is a waste and the only gains are from the full sized one.
Full sized actually has the worst gains out of all possible sizes.
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Old May 7th, 2017, 09:27 PM   #8
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Full sized actually has the worst gains out of all possible sizes.
https://acurazine.com/forums/3g-tl-p...talled-891096/

Sure buddy sure.
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Old May 10th, 2017, 01:46 PM   #9
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... That post has no information other than one car's gains on putting a full size spacer in.
Furthermore that post lost 4 hp peak and gained 5 tq peak.

With the correct size, and boring it to the right dimension, then boring the runners to the right dimension, you can gain the usual hptq of ported runners, then an additional 5-10 on both hp and torque. Without losing anything.

Also properly sized spacers will cause a flatline at the end of the curve, and not a downcurve. Somebody around has one of the dyno pics of my sold upper end builds, torque peaks then goes straight flat for the remainder like it should.

So sure buddy, that was exactly the right argument you needed to make to disprove that a non-stock height has the most gains.
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Old May 26th, 2018, 10:46 PM   #10
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?

I'm new and there doesn't seem to be much current 2018 8th gen talk here anywhere. I have to make 10 posts before I can start a new thread so here's #2. LOL

Coming from the Mitsubishi 3000GT/Dodge Stealth site's we look at the intake/plenum spacers as a gimmick. They make and sell them for the 3/S too. What's different about the Honda's where they seem to be so popular and talked about like they are doing something? I really don't know.

From my understand, or at least why they are marketed to us over on 3Si, the idea is to get the upper intake manifold off of the lower manifold which is bolted to the block, it's done to isolate it from the heat for the engine and therefor lower you intake temps for more dense air = power. (or at least the 3/S's have a lower manifold, but either way... it's to get it away from the heat of the block) They also sell throttle body spacers for the same reason, to get it away from the manifold to keep the TB cool. Is that correct as to why you guy's do it?

Reason I ask, is because it was pointed out that if you place your hand on the VR4's manifold/plenum when the engine is running it is cool to the touch. I confirmed this on my car even after a good bit of spirited driving. It's only until once you turn the engine off does it get hot as hell and WILL burn you. The spacer doesn't lower the temp at all. The engine sucks the heat in at such a rapid rate that the spacer does absolutely nothing except raise the manifold. At least, that is the case with my twin turbo 3000GT. I have yet to do the hand test on my Accord V6 but I don't think it being turbo has anything to do with it, it still sits at idle and cruises under vacuum just like a N/A engine.
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