H manifold design

[PR CB7]

over a period of time ive seen a few designs for the h22

double TB(?????)
single TB (?????)
spacer removed (works great
double spacers (sounds good, restricts at top end)
poormans euro r (i just did one for d112crzy)(best one so far)

now my question is in the double and single TB ones

would it work??????

http://cgi.ebay.com/ebaymotors/h22-h...ayphotohosting

[fatboy1185]

so its better to remove the spacer completely?

[PR CB7]

plenum and runners
ask jose (i had double stacked)

[fatboy1185]

I think i'll be removing my spacer, i'm in the process of gutting it out

[F22HB]

I'll be running the stock iab plate with a blacktrax on my h23. Am I right in thinking no spacer is for top-end hp?

[BB6-SH]

I'll be running the stock iab plate with a blacktrax on my h23. Am I right in thinking no spacer is for top-end hp?

yes u are correct.

Im actually thinking of removing mine completely and getting tuned again.

[F22HB]

Kewl, I like my low-end, so the spacer is right for me.

[fatboy1185]

I wonder if anyone has a dyno to actually show a difference in the powerband with and without the spacer. I would venture to say it is minimal.

[mozzandherb]

A phenolic spacer has been known to make some power gains

[Granite CB7]

A phenolic spacer has been known to make some power gains

That's true, BUT there is the argument of it's benefit in the middle of the manifold, sure the spacer concept is great, but if you already have a phenolic IM gasket, what good is having a phenolic spacer in the middle of the IM, when a stripped out OEM IAB plate does the same job for next to nothing? Even w/o a phenolic IM gasket, the runners will still heat up some, so you'd have a cooler plenum, it's 1/2 of what you want. Something to think about!


I read a post from 98VTEC awhile back saying that w/ tuning, removing the IAB plate completely will def. show decent gains. I think the info orig. came from HT, and I'm not exactly sure if there was a small gain in the low end as well w/ tuning or if it was truely a mid-high range gain.

To start, I'm going to sit the plenum directly on the runners on my A6/H series IM, I'll see how I like it.

[PR CB7]

i works on high rev motors

on a stock single cam u won see no gains at all

[fatboy1185]

i works on high rev motors

on a stock single cam u won see no gains at all

what about turbo motor?

[PR CB7]

what about turbo motor?

thats another story,

it should work for the fact that air is being pushed in

[fatboy1185]

but you would think with the spacer would allow more air in, which would help?

[H22Artman]

over a period of time ive seen a few designs for the h22

double TB(?????)
single TB (?????)
spacer removed (works great
double spacers (sounds good, restricts at top end)
poormans euro r (i just did one for d112crzy)(best one so far)

now my question is in the double and single TB ones

would it work??????

http://cgi.ebay.com/ebaymotors/h22-h...ayphotohosting

what is this poormans euro-r that you refer to??

i am poor and i have an extra h manifold in my parts box.

something needs to be done with it.