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

[snoopyloopy]

yes, they fit.
https://www.3geez.com/showthread.php?t=45846&highlight=b16a2
and here's a whole discussion on it
https://www.3geez.com/showthread.php?t=98...ighlight=b16a2

[Civvy]

yes they will bolt up. then you will have to port match the head because we have much smaller ports.
Removing all that metal from the ports will result in a very noticable loss of low-end torque and will shorten then powerband, making the car miserable to drive normally.
Yes Vtec manifolds have fatter runners, narrow runners are better for velocity.
Vtec manifold runners are also shorter which further adds to powerband. shifting.

[newaccorddriver]

i thought the less restriction it has the more power it would make. how can letting it breathe easier by porting out all the metal hurt low end power? it would burn a bit more air/fuel in the low end wouldnt it?

[gfrg88]

but having a 2" exhaust, and a short ram intake would i still lose a lot of low end power??

[carotman]

Well, I didn't notice a low end power loss that was enough to make the car annoy to drive on a daily basis. I'm using the edelbrock manifold which is even bigger and shorter than the OEM B16A manifold. The Top end is awesome tough.

[thegreatdane]

Unfortunately I was unable to get a measuring with the stock intake manifold. Well not excactly true but I had problems with the crossmember supporting the tranny hitting the rollers of the dyno, so I'm not sure if the results was correct, although the dyno is supposed to compensate for that the same way as it compensates for loss of power in the transmission. It peaked at 128hp on that run.. But I'll be referring to the dynorun I did on my Accord last year instead with a completely stock B20A2 engine (same specs as B20A1) and they were both dynoed at the same dyno.
look here if you want to see my other dyno thread: Accord dyno thread

One thing to notice though is that when the Accord was dynoed it only had around 31.000 miles on it, and the Prelude I dynoed today has around 142.000 miles on it.


B20A1 engine with B16A2 intake manifold, I was a bit surprised too see the tourqe this high: (I corrected the Rpm scale a bit, it was way off..)



for you lazy yanks the peak torque translates to 144.4 lbs/ft.

B20A2 engine completely stock:




here torque translates to 135.5 lbs/ft.


So, worn out B20A1 engine with B16A2 manifold produces almost 10 lbs/ft more torque than a stock low miles B20A2 and the same hp. Pretty good I'd say.

B20A1 with B16A2 manifold:

143.6hp / 6453rpm
144.4lbs/ft / 3548rpm

B20A2 stock:

144.7hp / 6200rpm
135.5lbs/ft / 3000rpm

Cheers


oh, and if a mod would be so kind an add a link to this thread in my B16 manifold howto that'd be nice.

[carotman]

Sweet!

Can't wait to dyno mine with the Edelbrock manifold. I wonder if that thing is too big or not. It sure feels nice tough.

Finally, we have a proof that the B16 manifold is the way to go with these engines.

[SteveDX89]

Sweet!

Can't wait to dyno mine with the Edelbrock manifold. I wonder if that thing is too big or not. It sure feels nice tough.

Finally, we have a proof that the B16 manifold is the way to go with these engines.

I'm willing to bet it's gonna be a bit too big. I'm sure you'll see a gain over the stock manifold but OEM B16 manifolds are the best way to go on light builds.

[thegreatdane]

Sweet!

Can't wait to dyno mine with the Edelbrock manifold. I wonder if that thing is too big or not. It sure feels nice tough.

Finally, we have a proof that the B16 manifold is the way to go with these engines.

If it's too big just boost the bastard

When is it getting dynoed anyway?

[carotman]

Nah, it won't be too big I kept a normal sized TB so it should be alright. The Plenum is basicaly an air chamber. The runners are just a bit bigger and shorter so it can't be worse than an ITB setup.

I'll get it dynoed this summer at the same time the ECU tuning will take place

[w00tw00t111]

Wait so is this proof that the b series manifolds are a better choice for the a20's as well? I mean just b/c they're better for the b20 doesn't mean that us stock*not jap or euro* guys will se a gain like that...correct?

[carotman]

Wait so is this proof that the b series manifolds are a better choice for the a20's as well? I mean just b/c they're better for the b20 doesn't mean that us stock*not jap or euro* guys will se a gain like that...correct?

You will see a gain for sure beleive me. I can't say how much but expect it to be one of the best bang for the buck parts.

[Lok]

These are really nice results!!!!!! look at torque!!!!! even K20 and F20 from S2000 have less..............B20A ROCKS!!!!!!!!!!!!!!!!

I came back to what TheGreatDane said before the Dyno:

'Not really. The powerband seems more smooth now, but that's probably just a result of a loss of low end power and the top end power still remaining the same.'

As we see on the Dynograph the torque curve is smoother than before....the overal horsepower is the same but on higher rpm.
Torque improved on slighty higher rpm, but the engine seems to like the larger plenum of B16A manifold.

Before we had 140hp at 5500rpm but now we have 140hp at 6200rpm.

But overall the engine must benefits from these mods?( I think B16A manifold with KN short intake?).

Before the engine power drops after 6500rpm, but now seems to hold the power until the rev limit!!!!!!!!!7000rpm!!
The car must be faster and with over 140mph max speed????

Congrats Thegreatdane again for the good job!!!!, I think is time for one B16a manifold and a CAI for your jdm specs B20A Accord....

Carotman's engine is TOP SPEC, if the cams and the ECU (with some nice adequeate injectors) tuned on Dyno, 210+ crank hp (190whp) is not an issue...

Also, i find today this car on ebay:

http://cgi.ebay.co.uk/1986-HONDA-PRE...QQcmdZViewItem

Please someone (british or not) from this board or the prelude 2G forum to pick it up.

I will not buy it, I am searcing for an Accord 2.0I-16 cheap.
Prelude has different fuel lines and axles I think, so I can't do my swap.

[gfrg88]

man those are some really nice numbers, i cant wait till i install my b16 IM on, i just need some time to install it

[Acid X]

Too bad there's no intake manifold options for us carb'd people.

[SteveDX89]

Too bad there's no intake manifold options for us carb'd people.

You could have your IM ported.

[Civvy]

manifolds being changed on most Honda engine's is the way to go for performance.
Although I'm still not convinced the B16 mani is the way forward,
Maybe the cars' just faster from all the ally you had to remove to port match (ha,ha j/k)
I'm still thinking of a custom manifold.

[gfrg88]

but he didnt port match it, he said he just bolted right up.....

[Cheeseburger]

nice dude

[adams86lxi]

ALright well im using a b18a1 intake manifold off a integra on my accord and i was wondering what exactly i dont need to hookup and can just ditch when hooking up the electrical connections and vaccum lines on this thing.

Do i still need:

-dashpot
-idle control solenoid valve
-ac idle boost valve
-cold advance solenoid valve
-idle mixture adjuster sensor
-fast idle valve (or could i just leave it hooked up without coolant running threw it?)


and anything else you guys can think off i dont need anymore. My goal is to get rid of ANY unnesicary parts i dont need but still allow the car to run fine and still have a heater lmao..

[gfrg88]

good questions, im still wondering the same things before i hook mine up too....

[carotman]

Well, you need everything that was on your OEM manifold if you want to have a perfect running car.

[adams86lxi]

IACV can be replaced by a 10w 10ohm resistor from radioshack. You won't have a regular warmup sequence and will have to manually hold the throttle open to warm up.

Cold advance, same thing.

etc.

hmm could i do that with the egr valve too? So it doesnt throw a code? Or will it not work?


also im guessing it would be fine for my to just plug the holes for the b18s iacv in the back of the intake mani with some bolts and seal it off with some silicone too right?

[gfrg88]

what could happen if the egr isnt hooked up????

[adams86lxi]

anything else you guys know about what to do with the other sensors???