F22A1 vs A4 vs A6 - differences?

[king_cobra]

What are the actual differences between each of the 3 motors?

does A4 have 4-2-1 like the A6?

[Shadow1]

F22a1: 125hp
F22a4:130hp
F22a6:140hp


the difference between the motors:

A1: single runner intake manifold. cast iron exhaust maniold


A4: tubular style exhaust manifold. more like after market headers when you look at them.

a6: a more aggressive cam and a dual runner style intake manifold. the a6 intake manifold has 8 runners instead of the a1 and a4's single runner. paired with the PT6 ECU for the A6 the butterfly valves inside of the intake open up at 32ooRPMs i do believe(someone correct me if im wrong) and allow for more airflow.

if you have the f22a1 or a4 get the intake manifold, ECU, and cam out of an F22a6 and you'll get a good increase in power. most say tho they actually felt more of the gain(more OF) from installing the cam. but if you get all three of those and install it on your a1 or a4 you'll get a 15-20hp increase. all from stock parts


now if you want more of an increase, get the H23 intake manifold or upper plenum and throttle body for an at least 5hp gain(not dyno'ed yet).

[king_cobra]

does the A4 and A6 have the same exhaust manifold and downpipe?

[Shadow1]

does the A4 and A6 have the same exhaust manifold and downpipe?

no. the a4 exhaust manifold is tubular and the a1 and a6 exhaust manifold is cast iron. if you have the a1, get the a4 exhaust manifold for a little bit of a gain. 5hp at the most with a good running motor.

[91 EX-R]

F22a1: 125hp
F22a4:130hp
F22a6:140hp

if you have the f22a1 or a4 get the intake manifold, ECU, and cam out of an F22a6 and you'll get a good increase in power. most say tho they actually felt more of the gain(more OF) from installing the cam. but if you get all three of those and install it on your a1 or a4 you'll get a 20-30hp increase. all from stock parts

More like a 10-15 horsepower gain on a healthy motor.

[Shadow1]

More like a 10-15 horsepower gain on a healthy motor.

well a 20-25hp increase on an F22a1 my bad. lol

[91 EX-R]

well a 20-25hp increase on an F22a1 my bad. lol

If you put all the A6 parts (the intake manifold, cam, and ECU) onto the A1, It'll basically be an A6, which is rated at 140. That's only a 15 horseposwer increase.

If you throw on the A4 exhaust manifold, that's good for close to another 5 horsepower. So now you're looking at a close to 20 horsepower gain.

[Shadow1]

If you put all the A6 parts (the intake manifold, cam, and ECU) onto the A1, It'll basically be an A6, which is rated at 140. That's only a 15 horseposwer increase.

If you throw on the A4 exhaust manifold, that's good for close to another 5 horsepower. So now you're looking at a close to 20 horsepower gain.

1st post edited. dont want to steer a new guy wrong. thanks

[92vig]

My Vigor has the butterflies in the intake manifold. They open up around 5,000RPM and continue to 6,800. One thing I noticed is there is a valve on the back of the intake manifold and a vacuum line running to it. If you take the vacuum line off of the valve and plug the line, the intake manifold will be open at all times. This helps with my low end power, opposed to my high end power....not to mention it sounds like a motherfuckin beast always. Not sure if you have that on the back of your intake manifold, but it wouldn't hurt to look. Could gain a bit more power at different RPM's that way.

[Gotz Cb7]

Yea, I tried it out, but my engine isn't runnin' right. I didn't see much of a low-end loss or gain when I took the butterflies out. I did, however....notice a difference from 2500rpms to 4800rpms(when butterflies normally open), and then so on. I took my pt6 out, and replaced it with a p12. I took the spring out of my IAB system, to where I can close and open the 4 extra ports, whenever I want. Deev said something about me actually losing power going to the p12, but I noticed an increase in torque throughout the rpms. I get better gas mileage too.

[blackice]

awhile back i remember there was a thread about the a6 having the oil pan baffle while the a4 and a1 didn't....

[Shadow1]

awhile back i remember there was a thread about the a6 having the oil pan baffle while the a4 and a1 didn't....

not a baffle but a windage try. i think it keeps the oil from foaming up at high RPMs or somethign

[Brandoncb7]

Well I just went to a salvage yard yesterday to get a new motor and linkage for my windshield wipers and they had like 5 or 6 cb7's sitting out there all in good shape. The one I was getting the parts off of had an F22A6 in it. So I guess now i'm gonna go back and see about the intake mani, ecu, and cam but what about the oil pan? I mean I know having the baffle would be better I guess but would it be actually be worth crawling through the mud and shit that i'm gonna have to do out there to get it off the car lol? The Honda I found it on is gonna be a bitch to get it off of but oh well, they are pretty cheap on their prices. Thanks for this thread because I had the same question and was going to post it this morning. I saw F22A6 yesterday and was WTF. But then again this is my first CB7 so I still have alot to learn.

[accord_creeper]

Wich cb7 comes with the a6 motor?

[90Cb7sleeper]

Wich cb7 comes with the a6 motor?

91 SE
92-93 EX and SE.

A6 from manual cars do not have an OEM oil cooler
A6 from auto cars have The OEM oil cooler similar to the ones found on the f22b,h23, h22.