h23a1 intake on a f22a1 head

[tru2037]

Help!!!
I did the swap and for all of you wondering, they fit perfect, but the vaccum ports are different. I think i have them all right but the car seems to be burnig very rich, and the idle keeps bouncing up and down. I used a vaccum line to control the flaps in the h23 so they work right. Anybody know why?
thanks

[accordztech]

what did u do exactly? fit the intake box or the top part of the intake or the whole manifold?

[tru2037]

the whole thing. throttle body and the intake runners. I'm going to keep tring but anybody have this problem, maybe i can find the problems

[Dutchaccord]

try rotating the TPS sensor... it can fix the idle problem.

[tru2037]

hey i got it, with a whole day of screwing around with set screws and vaccum lines! I pluged the flappers into the vaccum port on the back right of the intake, the map sensor to the throttle body and the other two that come out of the egr/map box to the plenum, then plugged up the last one. if your doing it you'll know what i mean! Couldnt get the idle down and the ecu kept telling me a code 7(throttle angle sensor). Then I turned the tps down and turned the idle screw all the way down, the flat head screw above the intake port, and presto runs great!

Now I did this with no head or intake work or a cam so the outcome wasen't spetactular but there is a difference.

But for those posts that say the ports dont line up they do! The only reason they have different part numbers is because the mani gasket comes with a plenum gasket, which is different.

[tru2037]

update: well after it cooled down i started it up and the idle did is again, i shut it off and back on and it dosent do it anymore... any suggestions? im going to check out a new tps sensor 2maro.

[accordztech]

oh ic...what id try is to mess with the fast idle valve. take off the cap and screw the thing inside will help that hopefully.

so do u actually know for exact sure that the holes line up to the head? or is it slightly bigger?

what difference can this be from

f22a6 manifold and h23 upper penum with h23 TB

vs

full h23 upper plenum on the head?

any advantages you think?

[tru2037]

There is so many valves ive screwed around with which one is the fast idle valve? ive got iab, tps, iat, map, egr, ect... I bought a f22a1 intake mani gasket and it was the same one that was crusted on the h32a1 intake.

The f22a6 manifold i havent seen but from what i heard that thats the one to get but the h23a1 is fine to me. Going from four ports to eight and bigger runners is all i wanted, which is on the whole h23a1 intake. I drove it all day long with no problems.

Thanks for the help though

[accordztech]

as far as i know the f22a6 manifold is the same as the h23. the dual runner system you know...

well the fast idle valve is a valve towards the side, it has a copper piece on top held by 2 screws. under it is 2 coolant passages.

so are you running ur dual runners by vacumn or wide open? or using the IAB controller?

[tru2037]

Vaccum. Works just fine, It seems like 3k-3500 rpm when they open. Low RPM the flaps are closed. But still tring to figure this idle thing out, and I'm going to adjust that fast idle valve tomarrow. At the moment I think the tps sensor on the mani that i got is bad. With a bad tps sensor the ecu with use the other sensors to try to make up for it, which is what it acts like its doing. It takes longer to idle down even after its warm at a stop, than it did b4

[tru2037]

DONE! It waz just the egr valve gasket throwing everything off! I adjusted everything back to oem and it runs great. Just to for insurance I'm going to take my fiber optics and look down the ports for alingment (im positive already thats its fine though).

done:
N/A F22A1 Block w/ H23A1 intake w/ secondary flaps on vac.
injen CAI
DC Sports Header
Nology Hot Wires w/ amp
2.5 exhaust w/ ractive cf muffler
aluminum rad.
cat? what cat?

soon:
cam
injectors
p&p head & intake
hc pistons
forged rods
lw flywheel
prelude tranny
safc apexi
adj. cam gear
maybe n2o maybe...

[cokinut]

how are the performance gains and could you describe it for me? I have the choice of gettin an f22a6 (complete) or an h23 (complete) and i was wondering if you thinking the h23 was worth it. What exact lines did you have to reroute and were there any problems you encountered? was this a straight forward swap?

[tru2037]

Hey from what I've pieced up from reading here the ideal intake setup would be the A6 lower half and the h23a1 upper half and throttle body. I just did the complete h23a1 swap and am very happy with it. I've got no real numbers to tell anyone but I can tell the difference. My 0 to 60 seems much quicker.

No one has the gaskets yet so I can dissasemble the intake and check the ports but shortly

[accordztech]

so did it perfectly bolt up

[tru2037]

safc

ok guys now w/ the mani swaps done and im back to tearing the motor back down for more mods, i wanna use a apexi safc to up the fuel with the combination of a aem fuel rail and regulator - now the safc says they need a knock sensor to hook up.? Have any of you guys done it anyways - how did it work out? Also is wideband really worth it

off the subject i really need to get this ride lower and when i say lower i mean at LEAST 2.25" (going for more performance than confort) any ideas? I waz thinking skunk2 coil overs and kyb gr2's for dampers. keep in mind for suggestions i cant dump 800 bucks all at once for tein's or apexi's


done:
N/A F22A1 Block w/ H23A1 intake w/ secondary flaps on vac.
injen CAI
DC Sports Header
Nology Hot Wires w/ amp
2.5 exhaust w/ ractive cf muffler
aluminum rad.
cat? what cat?
aem fuel rail
aem fuel regulator


soon:
NEXT - cam
injectors
p&p head & intake
hc pistons
forged rods
lw flywheel
prelude tranny
NEXT - safc apexi
adj. cam gear
maybe n2o maybe...