H22 plenum manual or auto?

[kirk90]

Since I have fixed my idle issue and my code 43. Now im looking for an H22 upper plenum! I was looking on a couple of junkyard sites and they ask if i want auto or manual? I dont think it matters does it?

[HondaFan81]

Does not matter, unless you get the TB with it. The auto and manual TBs are different in throttle rotor design.

What you need to know:

Auto TB can be used on Manual as well.

Manual TB can only be used on Manual.

Check link below, 2nd post:

http://www.cb7tuner.com/vbb/showthread.php?t=38936

[kirk90]

So could I just swap throttle plates (where the cable hooks up)? What years am I looking for? I have a 92 f22A6. Thank you for that info it helps!

[HondaFan81]

92-96 Prelude Si (H23) plenum.

93-96 Prelude Si VTEC (USDM H22) plenum.

There may be slight difference in the H22 vs H23 plenum. I've personally used the H23. Just make sure it all goes together well, seals nice. Use grey Permatex silicone or similar to seal, instead of paper gaskets. Make sure of no vacuum leaks.

Throttle cable will install like stock.

IACV location is same. FITV is under TB. Air starting valve is in same area, but not same exact location. I'd block off air starting valve if you install performance camshaft, it can cause vacuum leak and idle trouble.

[StinkinLincoln]

I did the H23 Plenum and TB swap with a Double stacked getted IAB Spacer on my A6 best mod so far!!!

[HondaFan81]

I did the H23 Plenum and TB swap with a Double stacked getted IAB Spacer on my A6 best mod so far!!!

Care to elaborate on your experiences....details por favor. You retain IAB ECU control?

[kirk90]

Cool thank you for info! just researching it all and pricing before I jump into it.

[HondaFan81]

For reference, back in day I paid $100 for H23 plenum/runners from junkyard. Another $50 for H23 TB.

Got to like how they separate the parts on purpose.

You're best bet is to find a member on here with parts, even if it's the whole H23 IM with TB.

[kirk90]

Theres a guy on ebay that has just the upper plenum H22 for $25 plus $20 shipping. nothing on it as in iacv,fitc, throttlebody, ect

[kirk90]

How do I get into the for sale threads? It says I need a password? Never mind I figured it out! DUH

[kirk90]

Can I use a throttlebody from an A1 or A6 on the H23 upper plenum? I just purchased the whole H23 intake manifold and it does'nt have the TB.

[deevergote]

No, you need an H22 or H23 throttle body. The F22 TB won't work.

[kirk90]

I did some research and found out the h23 is 62mm and f22 is 60mm.

[Turbocutlass]

Since I have fixed my idle issue and my code 43. Now im looking for an H22 upper plenum! I was looking on a couple of junkyard sites and they ask if i want auto or manual? I dont think it matters does it?

im in the process of looking for the parts as well.. i cant wait to do the swap.. im just wondring if i should do the double stack or just the top.. im not to sure on the difference in hp/tq difference with or with out..

[kirk90]

I have the A6 IAB's in the runners and was thinking of doing the double stack as well. But how would it affect the response of the iab functionallity? Im thinking it would give you more low end torque? I have a light hooked up to my iab's. its hooked up so when the light goes out the ground from the a17 pinout is appling ground. Hits about 4800rpm.Wondering if a double stack would activate the butterflies sooner because of more vacuum? I did some research on double stacking and you can use the bolts that go into the ac compressor for the two in back they are 8x1.25x100 and the other 3 holes will be to long so use washers or get 8x1.25x90mm