I've been working on porting out one of the stock manifolds since there isn't really a decent price aftermarket manifold available yet for the H22. I've have basically joined the two runners in the intake bypass manifold together into one large runner. about a half hour with a recipricating saw and some smoothing out with a die grinder is all i've done so far. I"m gonna do some more polishing to make the bridges smooth and rounded.

 

crap i ment to post this in the prelude forum

 

this is the right place.

 

id be intrested to see how much better this flows over a stock mani. looks good

 

will this be cheaper than bying a type s manifold? will it perform better than a type s manifold? noob here

 

Its been done to death... It loses down low and doesnt gain much of anything mid and top...

Simple, over thinking and over applying can sometimes make for time wasted....

Think simple...

Heres an idea...

fill the hole in between the Square and the circle openings on the the casted plate at the top of the runners. Port the squared opening to match the circle opening that sits just in front of it... run 8 velocity stacks/air horns that sit level with the plate floor. The only portion of the velocity stack/air horn that should be portruding is the actual rolled trumpet portion, almost like a speed bump surrounding the openings.

You may have to fab a new plate or add material here and there... Its all depending on whos doing it and there preferences in fabrication.

The thing I like about the runners of the H22 is the fact that they run a large taper. I think the only downside of the H22 IM is the mid to uper half, the runner entries and the plenum itself.


Modified by SoCalude98 at 5:11 PM 5/20/2004

 

heres a pic of the velocity stacks/air horns...



The only difference from the way they are in this pic is the fact that in this pic, they are roughly above the surface or in this case the adapter floor.



The height above the plate floor on the prelude IM isnt needed with these so your going to have to machine off quite a bit to level them.




Modified by SoCalude98 at 5:17 PM 5/20/2004

 

cool the thread was moved to this forum. As for the 8 velocity stacks in the manifold i think thats a little extreme adn would cost a lot. by then i would just make a custom manifold all together and use 4 larger velocity stacks like itbs and enclose it in a plenum with 1 throttle body. As for losing lowend without the iabs, i think thats just a theory. I have always had them off and dynoed without them with about 140-145 wtrq from 2500 rpm all the way up to the vtec switch. I think the sole reason for the iabs from honda engineers is fuel economy. Anyways i would much rather sacrifice some lowend for some top end cuz everyone knows that the h22 just dies at the top end.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrMike &raquo;</TD></TR><TR><TD CLASS="quote">As for the 8 velocity stacks in the manifold i think thats a little extreme adn would cost a lot</TD></TR></TABLE>

They are actually fairly inexpensive...

 

Like this...



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