Anyone ever reverse the manifold on a 2.2? I have tried but cant seem to get it to work out. If you move the alternator to the where the air conditioner is the IAC on the intake manifold is in the way. No room to move the alternator to the opposite side of the motor. What year/model did Subaru put the IAC on the throttle body? Any information would be greatly appreciated.

I do believe that this is a custom job...

I do believe that this is a custom job...


yea...lol

no offense but why, it will beno benefit to our cars

Because I have a 2.2 installed in a 74 VW Karmann Ghia. I do not want to cut a hole in my firewall. The TB lip sits about 3/4" away from the firewall. That is why I want to reverse the manifold. If I cant find a 3 wire IAC that mounts on a TB, I am going to make a block off plate for the IAC and relocate the IAC 180 deg. to the opposite side of the manifold. Weld in a new adapter plate.

Interesting... good luck with that. The only reverse manifolds I have seen are on extremely built up STi's (I have witnessed 2 examples), and on the WRC cars...

I dont think its all that difficult to do. I was playing around with my 2.5 manifold and it would bolt up fine, there was 1 bracket in the way but no big deal

Yeah, the 2.5 would be a piece of cake because the IAC is on the throttle body. On a 2.2 the IAC is on the intake manifold.

Can you plug the IAC and use a 2.5 throttle body?

From what I have heard the 2.5 TB will bolt up to the 2.2 intake manifold. But the 2.2 manifold does not have an opening for the IAC air inlet. Plus the 2.5 is a 6 wire IAC and the 2.2 is a 3 wire IAC. I read a post where someone said they had a 98 Impreza 2.2 with the IAC mounted on the TB but I have looked up pics and I cant find a pic that confirms it. What I will probaly do is make a block off plate and weld in a new adapter plate 180 deg. opposite side of the manifold. And just relocate the IAC.

what year manifold are you using? becuase any 2.2 manifold is interchangeable, im just wondering if there was ever a 2.2 mani with IAC on the tb. also the 1.8 has it on the tb, but I dont think the 1.8/2.2 are the same. Ill tyr to find something for you though. cheers

The one I have is a 2.2, 95 Legacy, Auto. I read in the posts that a guy had a 98 Impreza 2.2 that had the IAC on the TB but I cant find any pics to confirm this. I am not a guru but I belive the 1.8 and 2.2 will both work. What year 1.8's had thet IAC on the TB?

well here you go, according to this guy the 1.8 and 2.2 manifolds are the same.

http://forums.nasioc.com/forums/showthread.php?t=822816

Maybe that could work

What year 1.8's had thet IAC on the TB?
probably all of them, I dont think subaru made many changes to the 1.8 over the years.

Thanks Tzedek, I am going to try and find a 1.8 TB or complete Intake manifold assy.

So what would it take to make an adapter plate that could bolt down to the head then the intake manifold to the plate that simply flips the manifold around? Shouldn't be too difficult... maybe a little money to have it made from like some .5" aluminum or something...

well here you go, according to this guy the 1.8 and 2.2 manifolds are the same.

http://forums.nasioc.com/forums/showthread.php?t=822816

Maybe that could work

:huh: He's wrong, I have both and the definately are NOT the same...

The 1.8 manifold will not bolt up to the 2.2? I thought there was only 2 bolt patterns for intake manifolds. 1.8 and 2.2 (offset bolt pattern) were the same and 2.5's (non offset bolt pattern).

:huh: He's wrong, I have both and the definately are NOT the same...
that was my gut instinct, but there are two guys in that thread that have done it. Have you tried to interchange them?

It should bolt up, I asked about this before, something was said about running lean or something (possible BS) but I'm not that familiar with it.

1995 1.8L, first thing I noticed, notice how sharp of a downward curve the manifold has...

http://img265.imageshack.us/img265/7044/s53012186fe.th.jpg (http://img265.imageshack.us/my.php?image=s53012186fe.jpg)



And from a 1997 2.2L (with the infamous Ebay Intake)

http://img315.imageshack.us/img315/457/224cz.th.jpg (http://img315.imageshack.us/my.php?image=224cz.jpg)
(seeing all the old pics... suddenly realizing just how much I miss this car:( )


And, while I'm at it, from a 2.5RS, not sure what year... THIS looks alot like the 2.5

http://img265.imageshack.us/img265/6149/subaruimprezarsmy001we.th.jpg (http://img265.imageshack.us/my.php?image=subaruimprezarsmy001we.jpg)

OK, Confused. I know that I have read that the 1.8 will work and the 2.5 will work. Then some places people say they will not work. There is a post some where that lists the difference in bolt patterns. I will try and find again. Might just try and locate a 1.8 TB and 2.5 TB and see if I can make either of them work. If they will not work I will have to break out the welder.

Off the subjest but did Subaru make a 2.5 in 1995? Purchaed a extra ecu off of Ebay but it has 1995 2.5 Legacy writen on the case. I did a little searching and could find nothing.

The 1.8's had the iac on the tb so just find one and try it out. It shouldn't cost much since no one seems to even want the 1.8 engine for anything else. Me and a friend are using my old 1.8 to make a dune buggy, he thought it would be a waste to let the poor 1.8 waste away. :)

I'm thinking of making a badass gokart when I swap out the 1.8 for a 2.5 I am getting in trade for that 2.2... or sell the 2.5 to make a 1.8T... hrm... decisions decisions decisions...

or sell it for more of building up a solid base for something good such as an ej20 that wouldnt happen until quite a few years from now... the 1.8 I have actually pulls pretty good, needs a new clutch thoh.

Found a 1.8 TB in a local salvage yard and I am going to pick it up today. I will let everyone know how it works out. Now I wish I would have just purchased a 2.5 instead of a 2.2 W/56000miles. But a 2000lb car will be quick with either motor. Factory VW 56hp. Suby 135hp. She's going to be FUN... :devil:

The throttle body fits perfectly. All I have to do is rewire up the TB sensor, stick the motor back into the car and fire her up. Thanks for everyones help. I wll post pics to let everyone know what she looks like.

flat_iv: does the 1.8 iac use the same plug as the 2.2 did?

hey if that tb doesn't work for ya i should have one, i'll check tommorrow, jsut lemme know if you need it.

tzedek, Yes, the 1.8's IAC uses the same plug(3-wire) as the 2.2's IAC (3-wire). The TPS are completely different but the wire are still colored the same.

Thanks gf8, I am going to try and get everything put back together this weekend as shw how it all works out. Still have to build a custom intake. And figure out how I am going to attach the vacuum lines to the intake. Somebody has to sell some sort of adapter.

So, I'm assuming you have no more A/C, correct? Do you know if there is a kit that keeps the compressor?

I have no AC. If I didnt reverse the manifold I could have kept the AC. Pitting a suby in a VW there is never a kit.

good luck and please, please post some picks when everything is buttoned up. That sounds like a sweet ride.

Updated pics of my reversed manifold.


http://webpages.charter.net/flat_iv/Karmann%20Ghia/Reverse%20Manifold%20002-1.JPG
http://webpages.charter.net/flat_iv/Karmann%20Ghia/Reverse%20Manifold%20004-1.JPG

that looks freekin awesome... keep us updated!!!

Here is a reverse manifold. Setup is obviously still in the works.

http://rallitekforums.com/forums/attachment.php?attachmentid=1248&stc=1

where did you find that intake piping?

is that a TGV or what? looks like a bypass valve:lol:

is that a TGV or what? looks like a bypass valve:lol:
FPR, i think

The thing on the left on the bug picture, that looks like a FPR, is an EGR valve.

Yes, that is an EGR valve. Still have to route the EGR tube from the EGR valve to the head.