Aftermarket , B16 , B18 , B18C5 Manifold + Pics + Install Advice + Dyno

[Elijah]

I think the B18A would be different then the C1. Mabey not but for some reason I keep thinking B16A and B18A are the same. Its just someone is selling one here for $75 canadian so I would like to get it if it is the same.

[AccordEpicenter]

I believe the a/b is different than the C1 and C5. The C5 is the same as B16a

[NXRacer]

i im pretty sure the bolt pattern is the same. i think the differences between them are runner lengths and secondaries.

[RobT5580]

88Lxi68 has a ITR intake on a b16 head but he thinks the b18a is different. But im still curious about the water power shown on the B16 thread here in the pic section. And the BBK on ebay is the GSR one and i double checked with the seller. The GSR BBK one does not have the water port which is what i want for bolting it up. Im going to the parts store though to double check to be sure.

[shepherd79]

here is the picture of B series manifold.
as you can see it has red and blue dots. that is the diff you have to make to fit.
I believe the blue one is for B16 and red ones are for B18. or other way around, can't remember.

[PhydeauX]

Heh, thats my old pic. Nice to see someone saved them, my server crashed long ago and I lost most of that stuff. That is actually an a20a3 manifold, but the gasket on top of it is from a b18a. The bolt patterns are slightly diferent, and the water jackets are diferent, but from the standpoint of attaching it to an a20a they are pretty much the same.

andy

[AccordArizona89]

ok so with a lil work u can get a b16 intake mani on my a20a3?

[guaynabo89]

The difference is in the top 5 bolt hole positions, and I think the water jacket changes a bit.

The type R (b18c5)and Civic (B16**) have the same setup as where the top three bolts make a small arch.

The gsr (b18c1) has the top five bolts straight across.

THe ls (b18b1) Has the two outre bolts position very high and the middle one dips down.

At least this is the only differnce I have noticed as far as how they bolt up.
The factory manifolds might have different pitch angles and runner lengths, but Im pretty sure the aftermarket ones are all basicly the same except the flange where they bolt up.


This is a ls gasket.

[hondamanlxi]

the gsr is way different. On my mani box it says b16a/b18c5 not GSR

[RobT5580]

I wanted the BBK which only fits the GSR so i bought the gasket and found all the bottom studs line up great. But the port where the injector sprays overlaps the head and leaves a small gap so the GSR manifold wont work unless you have that gap filled and of course re-drill the top studs.

[mykwikcoupe]

so since this is a intake manifold thread. Which is best of the aftermarkets. Im going to be starting this also here pretty quick. I was going to go with the jdm b16a but was looking at some of the ebay models. It seems as though the edelbrock is only better in the high RPM which Im not spending much time in. the others are about the same but the one on ebay http://cgi.ebay.com/ebaymotors/ws/eB...category=36474 has its little refinements so maybe give this one a shot. Im looking at the straightest, shortest runners but the largest plenum to hold for the turbo quench. Im thinking maybe this one and Ill have some stuff addded to it for looks.

Has anyone actually talked to the civic guys and found out which is best

[carotman]

Hmmm, the Intake I got is from a B18C1 I think.... I will REALLY have to check into this!

[RobT5580]

I will get a picture next week because my camera is in my accord so i can take pictures of the fluidyne mod.

[hondamanlxi]

mykwikcoupe, thats the exact manifold i have

[carotman]

Ok it seems I have the B18a B18C5 manifold.. never mind

Anywaym, I hate the 3rd gen Accord Intake manifolds.

[Civvy]

I feel a bit of a newb asking this but hey, bollox
I've got the B20
I'm a believer of the long stroke being good for launching and low-end torque.
I'm thinking serious bout all the work to fit the b16 manifold i.e. removing the head and having it port matched and bolted on properly.
But, i've got a few concerns, am i going to lose the low-end torque that gives me good launching? i want to increase the torque not loose it.
Surely out of the two manifolds I would get more torque from the B18 manifold?

[RobT5580]

The B16 has the same ports you just have to redrill the top mounting holes. I have the edelbrock victor x which probably is the hardest to fit. I had to redrill the top holes, try to make the holes flush since the manifold does not have a completely flat flange, and modify the rear upper mount brackets.

[Civvy]

o.k. but it wont effect ure torque so much since uve got possitive pressure?

[RobT5580]

I wouldnt use the victor x on a N/A setup if i was in that situation i would use the Skunk2 manifold which is similar to the ITR manifold.

Carotman has the victor x so if you wait a little im sure he will be putting it on when the weather breaks. Its experimental for us since were on our own finding and trying parts so we should see how things work out soon.

[2dsei]

Is there any other thing that needs to be done beside redrill the upper hole i just got one for my 89 accord

[2drSE-i]

the top mounting holes........nice to see another SE-i coupe on the board, as there are only a couple of us

[Versanick]

Vacuum lines... I had considered such a swap, but most b16/b18 manifolds don't have nearly the available places to take vacuum from as our engine controls require.

If you have the vacuum line crisis solved, then drive thru....

[carotman]

I did lose a bit of low-end torque with the Victor-X. The top end is awesome tough. Maybe a TB spacer would help the low end a bit.

[bobafett]

do you guys have any b series throttle bodies or fuel rails laying around? i need to snag some..

[AccordEpicenter]

youre gonna lose some bottom end going from an a20 mani to a B16/B18 mani, their runners are a bit shorter and bigger, which is great for top end power, but for torque, the a20 intake will win