Pt6 vs P12 ECU

[Ernestox6]

Hey guys! New to CB7! If anyone could direct me to an intro thread so I can introduce myself formally that would be great...

Anyway, first off. I do NOT drive a CBanything, or any accord at all for that matter. I joined today because i own a '93 honda prelude S. Why am I here? Because the CB7 and the BA8 both use the F22s! I am a member of Socalprelude.com as well, but most of them have the h23/h22 in them, and are no help to me when I ask F22 specific questions.

Back on topic, I am about to do the A1 to A6 intake upgrade. I have all the parts and just need a little more info before I start tearing apart my car.

So far I have:
-F22a6 intake manifold
-H23a1 plenum
-H22a6 spacer

I am going to be using my a1 TB so I'm not going to worry about that.

Now, my original question. What are my main differences between the pt6 and p12? I need to know
-Speed limiter
-fuel/air ratio
-power gains(ex. p12 ecu boosts me from 125 to 135hp. what will the pt6 do?)
-how they will handle the rest of my A1 setup
-how will it affect the butterfly thingy that the A6 has
-any other important info I may need

Why am i using a F22a6 IM and H23a1 plenum? Better airflow!

Thanks in advance! I hope to be a good contribution to this site!

[Tippey764]

Are you going to wire up the black box then use the pt6. If you arent then use the p12

And you cant use an f22a1 throttle body on an h23a1 plenum ( or an f22a6 throttle body )

[Ernestox6]

Are you going to wire up the black box then use the pt6. If you arent then use the p12

And you cant use an f22a1 throttle body on an h23a1 plenum ( or an f22a6 throttle body )

I've read that you can, but I haven't tried, and will try tomorrow. Is the black box the thing that controls the butterfly thingy? What happens if I don't wire it up?

[wed3k]

thought about changing to a pt6 cam?

[Tippey764]

I've read that you can, but I haven't tried, and will try tomorrow. Is the black box the thing that controls the butterfly thingy? What happens if I don't wire it up?

The black box controls when the butterflys open and close. It holds pressure on the little diaphram thing and holds them closed. When you go to between 4000-4500 rpm it relases pressure and they open up. You can hook the butterfly valve up to a vacuum line. When you go WOT the vacuum in the manifold will be depleted and there will be no more pressure to hold the butterflys closed. Thus they will open.

And yes switching to an A6 cam is always a good idea.

Also switching to an a4/a6 exhaust manifold will give you an easy 5hp. ( the only difference between the 125hp a1 and the 130hp a4 is the exhaust manifold )

[Ernestox6]

The black box controls when the butterflys open and close. It holds pressure on the little diaphram thing and holds them closed. When you go to between 4000-4500 rpm it relases pressure and they open up. You can hook the butterfly valve up to a vacuum line. When you go WOT the vacuum in the manifold will be depleted and there will be no more pressure to hold the butterflys closed. Thus they will open.

And yes switching to an A6 cam is always a good idea.

Also switching to an a4/a6 exhaust manifold will give you an easy 5hp. ( the only difference between the 125hp a1 and the 130hp a4 is the exhaust manifold )

Thanks alot, that really helps. Where do i connect the vacuum line to control the butterflies? Is it one of the little things that are blocked off at the top of the plenum?

[cloudasc]

Vacuum lines from the IAB plate goes to the black box (its normally attached on the underside of the a6/h23 manifold), then another vacuum line goes from the black box to the plenum. Then the one of the electrical connections from the black box connects to pin A16 or A17 on the pt6 ecu... i forget which one of those two off the top of my head.

[Ernestox6]

Vacuum lines from the IAB plate goes to the black box (its normally attached on the underside of the a6/h23 manifold), then another vacuum line goes from the black box to the plenum. Then the one of the electrical connections from the black box connects to pin A16 or A17 on the pt6 ecu... i forget which one of those two off the top of my head.

Thanks man. I've been looking around, and I've found 2 F22a6 heads, and this Saturday I can get a 1/2 all deal and I hope to get the head for around $30-$40

I've also decided to go with the H23 intake manifold and plenum. Do you guys have info on how this may affect my gas mileage?

[deevergote]

More airflow generally means more fuel, especially with a stock ECU. Chances are, you'll be driving with a heavier foot as well.

Take it easy, and your mileage won't be terrible. It may decrease a bit, though. There's a price to pay for increased performance.

[Ernestox6]

More airflow generally means more fuel, especially with a stock ECU. Chances are, you'll be driving with a heavier foot as well.

Take it easy, and your mileage won't be terrible. It may decrease a bit, though. There's a price to pay for increased performance.

We'll I'm a pretty safe driver, and don't get thrilled with extra power like a normal person. I'm always trying to save fuel anyway I can, so even though the temptation will be there, I'll rarely use it.

Another question. How will my mileage change if the head I have now has 200k on it, and the new head has only 120-180k?

[deevergote]

It depends on the condition of the head. If everything is in good condition and seals properly, and the valves are properly adjusted, the gas mileage will be no different from head to head. The new head could potentially be in worse condition, or better, so it may decrease or increase (or stay the same).

[osl]

Hey guys! New to CB7! If anyone could direct me to an intro thread so I can introduce myself formally that would be great...

Anyway, first off. I do NOT drive a CBanything, or any accord at all for that matter. I joined today because i own a '93 honda prelude S. Why am I here? Because the CB7 and the BA8 both use the F22s! I am a member of Socalprelude.com as well, but most of them have the h23/h22 in them, and are no help to me when I ask F22 specific questions.

Back on topic, I am about to do the A1 to A6 intake upgrade. I have all the parts and just need a little more info before I start tearing apart my car.

So far I have:
-F22a6 intake manifold
-H23a1 plenum
-H22a6 spacer

I am going to be using my a1 TB so I'm not going to worry about that.

Now, my original question. What are my main differences between the pt6 and p12? I need to know
-Speed limiter
-fuel/air ratio
-power gains(ex. p12 ecu boosts me from 125 to 135hp. what will the pt6 do?)
-how they will handle the rest of my A1 setup
-how will it affect the butterfly thingy that the A6 has
-any other important info I may need

Why am i using a F22a6 IM and H23a1 plenum? Better airflow!

Thanks in advance! I hope to be a good contribution to this site!

I thought you would want to use the h23 mani and a6 runners?

[visualpoet]

I thought you would want to use the h23 mani and a6 runners?

The mani and runners are the same part. The plenum is the top chamber, the mani/runners are the part that bolts to the head.

[Ernestox6]

I thought you would want to use the h23 mani and a6 runners?

Visual is right. Although, I've researched both, and I've read mixed opinions of the a6/h23 manifold. Question

-Which one offers more torque?

[wed3k]

h23 has a longer runner setup, you'd want to use that.