Ok cool if you dont get a chance Ill do it before I cut mine up.

 

I'm thinking about trying this out too. If I do I'll probably end up selling it as my car isn't really running right now and I don't need an awesome intake manifold. But I'm really curious to see if this will work. I have access to an industrial bandsaw that will be able to make very precise cuts and I know some good aluminum welders. If I were to make one and then sell it, would you guys be more interested in one for a 99/00 head or the 94-97 head? I have both heads and could mock up either one, however I don't have a 99 IM, only a 94.

So in short, if you were in the market for something like this how many would want it for a 94-97 head and how many would be interested in one for the 99 head?

 

ummm....OP and myself are trying to do this for the 1.6L head.

 

Yeah I'm in for 1.6 as well

 

Just found a little tuner shop around the corner from where I work that has a used Blox (attached to custom LS head) for $120.

Gonna pick up after work tomorrow. Will proceed to measure both plenums and report back.

 

subbed for results

 

Turns out the bastards aren't open on Saturdays.

Little place I never knew was there called "FWD Performance." FWD fail, but looks like they're big on the drag scene, and they also carry DO kits.

Will try and get it Monday, and find a good aluminum welder locally to put it together.


I'll measure the plenums, but I think as far as a dyno difference we should find someone else. My car has no business being on a dyno right now.

 

Just for clarification. The B18 manifold appears to work for the 1.6 and 1.8. What about the B16 manifold? Would 1.8 guys be better searching for a b18 and 1.6 guys a b16?

 

I've wondered the same thing...I'm pretty sure they're the same jack.

 

If you're thinking this because of port spacing, no. The B-series Honda engines are all the same port spacing/bore (except the B20, which uses thinner cylinder liners to increase bore).

 

^ That's what I meant as well djp...the B16 and B18 use the same flange, unlike the B6/BP.

 

Another reason not to go for B16A/B manifolds is that, like the Miata market, the aftermarket focus is on the bigger B18C. The majority of the hi-po B-series Hondas use B18s so that's where the R&D goes.

 

The B16A (civic Si)and B18B (LS integra) dont use the same flange, but the port spacing is almost the same
also, the B18C1 (GSR integra) is a different flange but the cylinder spaceing should be the same as well.

 

hmm...good to know.

I saw some manifolds that were advertised as being for both motors.

That means either would work for our purposes since we're not using the flange, and just need the right runner spacing.

Some of the B16 specific ones I saw did seem like they had a smaller plenum though....complete unscientific observation.




I called the cell # I had for the shop owner, and he said he could meet me today to sell the manifold. Hopefully my wife won't drag me to her parent's house tomorrow. I'm gonna claim a football exemption, but will spend some time in garage.

 

from what I undertsand there is only one bolt that doenst line up between the B16A and the B18B.
Also, I just confirmed that the B20 uses the same flange as the B18B, so it must have the same spacing.
Thats how people do the infamous B20/vtec.
Thats a lot of oem manifolds to choose from in addition to aftermarket ones.

 

No one cares about the LS, lol. Not the head, anyway.

 

Hmm...the one I'm picking up is attached to an LS head...didn't know they were different. Not like it matters really. With either route we'll be matching a convergence point and cutting.

Hyd-Mech saw access at work ftmfw.

 

I have to say, I'm pretty excited about this. It looks like it could be a cost effective mod with big gains. I'm estimating $100 for my shop to do the cutting and welding.

 

Big PLUS ONE.

I'm trying to keep myself from getting too excited.

I'm expecting $150 for welding and am still stoked. Will just shift the powerband for me...but guys like Phil and yourself will see the real gains.

I'm in no hurry though, and am just rushing for the name of science.

PMed ya about this.

 

Just to clarify, the ITR B18C5 (Integra Type R, PR3) and the B16 (PR3) head share the same intake manifold spacing. The B18C (GSR, P72) is different.

^^ Excited to hear results about this too!