[junkyardjockey]

Hello!! I recently bought a 94 2.0L motor so I can install the shortblock in my 86 GTI,and I noticed that it has a dual outlet manifold.I'd like to install this on my 86 head,but I have a question : is there a difference(performance wise)between the original exh. manifold(single outlet) & the dual outlet?? I plan on installing an Autotech 270 cam with this job,and was always told I have to open up the exhaust when installing a cam,so will this do the job?? Also I need to know who sells a changeover kit(86 1.8L head onto 94 2.0L block)so I can complete this job.I already have a dual outlet downpipe.Thanks for your help! Ken Robinson

 

[155VERT83]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (junkyardjockey)

Big diff. Dual outlet FLOWS much better.

 

[Caleb]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (junkyardjockey)

5hp difference. I say screw the dual outlet and get a header. I have a brospeed one and LOVE it. I had the dual outlet from the factory but the header made a ton of difference.

 

[Thomas1]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (155VERT83)

Not just for the sake of argument, but I read in Performance Volks book that the late model single exhaust outlet and dual outlet flow about the same. It was the 83-84? Manifold that was stangulated. I have both manifolds regardless, but I am running the single outlet. Tech. Tun. seem to prefer the dual. I would like to see comparision flow charts.

 

[vdubturbo]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (Thomas1)

I have a dual for sale if anyone's interested. Down pipe an all...

 

[Tornado Wolfie]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (vdubturbo)

For what it's worth, I'd say it's not worth swapping. Getting your old manifold and downpipe off is so difficult I would rather just let those horses stay in the stable. BUT, I already bought a setup and messed up my old stuff in the second attempt to get it all done. I now have logged in about 6 hours arguing with rust and stuck bolts and I've gotten nowhere. This weekend is my final try. I've learned from the work, but if I don't manage to get my damn manifolds off this time I'm going to turn around and sell the thing right back to someone who needs it.

 

[Tornado Wolfie]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (Thomas1)

quote:[HR][/HR]Not just for the sake of argument, but I read in Performance Volks book that the late model single exhaust outlet and dual outlet flow about the same. It was the 83-84? Manifold that was stangulated. I have both manifolds regardless, but I am running the single outlet. Tech. Tun. seem to prefer the dual. I would like to see comparision flow charts. [HR][/HR]​

You talking about the Watercooled Volkswagen Performance Handbook? It was mentioned in there that the European Manifold flowed about the same as the slightly larger late-model US manifold. The Euro is a dual, but the Late Model manifold can be sighted by the piece spilliting the exit. The 83-84 Manifold actually was the worst of them all and if you have it I would definately do the swap 'cause it's really rediculous when you look at it. Nothing like choking the chicken

 

[Dieder]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (junkyardjockey)

dont screw around with the single outlet.
and if your going to do an ABA swap your going to need the A3 down pipe and manifold. The ABA is a few MM taller and it needs a longer downpipe.

 

[vwpat]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (Dieder)

quote:[HR][/HR]and if your going to do an ABA swap your going to need the A3 down pipe and manifold. The ABA is a few MM taller and it needs a longer downpipe. [HR][/HR]​

Not in an A2. That about the manifold is one of the many errors in that book. It is comparing an A1 dual to a late euro A1 single outlet manifold. The A2 dual flows much better than the A2 single.

 

[Dieder]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (vwpat)

you are saying that you can make a 1.8 DP fit on a 2.0 ABA?
Really? I thought that techtonics even sold a longer DP to make it fit?
When I did my swap I just put the 2.0 DP and manifold on, they were in much better shape than my old ones.

 

[vwpat]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (Dieder)

quote:[HR][/HR]you are saying that you can make a 1.8 DP fit on a 2.0 ABA?
Really?
I thought that techtonics even sold a longer DP to make it fit?[HR][/HR]​

Yes. That is for an A1.

 

[hoodita]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (junkyardjockey)

You dont need a longer downpipe when doing an aba swap. Im using TT's A2 race downpipe.Fits fine

 

[Andrew Foss]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (hoodita)

i will also chime in here and say that you dont need a longer downpipe, and that the a3 manifold should fit (in european car they said it didnt) but i have used both styles of a3 manifolds on my jetta, tt has all the conversion peices.
-andrew

 

[vwpat]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (Andrew Foss)

quote:[HR][/HR]i have used both styles of a3 manifolds on my jetta
[HR][/HR]​

What do mean by both styles? With and without the bars?

 

[hoodita]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (vwpat)

What bars?

 

[vwpat]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (hoodita)

quote:[HR][/HR]What bars?[HR][/HR]​

The reinforcing "bars" that some A3 manifolds have. I have heard 98+ but I think I have seen them on earlier engines also. They cover the intake ports on a counterflow head.

 

[hoodita]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (vwpat)

O ok. The manifold that I have is from a 94. Which didnt have anything like that.

 

[junkyardjockey]

Re: Single vs. Dual outlet manifold on an A2 : is there a difference?? (hoodita)

OK Maybe I'll clear a few things up.The d/o exh. manifold & d/p is from a 94 2.0L 8V.I plan on installing this manifold on my 86 GTI 1.8L head,along with the 2.0L ABA block.The exh. manifold I was comparing it to was my old A2 single outlet.I eventually will install a 268/270 deg. cam in this setup.All of this stuff is going into my 86 GTi,which is my hobby stock car.I drive this car on a 3/8 mile paved oval track.That's the intended use of all this work.I also intend to lighten my flywheel,and my head is already shaved .030". Any other suggestions??Thanks! Ken R.