Trying to find a decent T25 turbo manifold.

[GTFORZA]

I've been looking around at turbo manifolds for my 84 1.6 td. All the nice ones use a T3 flange for the turbo. I want to run a garrett T2259 or a GT25r. I was going to do a vnt 15 or vnt 17 but my turbo just ceased up and I haven't acquired enough parts to make that work so for now I either wanna see if mine is in good enough shape for a rebuild or upgrade to a more modern turbo.

I saw the cx racing T25 manifold, but it seems too cheap to be any good.

All the nice manifolds are T3.

Would it be a better idea to get a T3 and use an adapter for t25. Only yhing about that is I'm afraid there may not be enough room to clear the firewall. 

Basicly the thing is that a newer non vnt would be quicker to setup than a vnt. No need to spend tons of time tuning with a low boost spring in the wastegate. 

[vanbcguy]

I am looking for the same thing...

The best option I've seen so far is using a manifold where the turbo hangs low and then using an adapter plate.  I haven't measured everything out yet though - engine mount interference would definitely be a concern.

Something like this:

http://www.designengineering.com/category/catalog/spa-turbo-usa/turbo-manifolds/volkswagen/vw-8v-turbo-manifold

The turbo would be mounted to the bottom of the manifold.  A blockoff plate would need to be used for the blowoff valve provisions that are there otherwise.

[Jetmugg]

Although I'm using a slightly different chassis (Dodge Rampage), it's very similar to a Rabbit/Golf engine compartment.  Shown below is one of the CX racing type T3 manifolds with a T25 adapter, mounting a Garrett GT2056.  This is being mocked up on a 1.6 diesel block and head.  As you can see, this combination of parts would not fit without modifying the firewall...



I decided to set back the firewall about 3-1/2 inches for clearance around the turbo...







Those generic manifolds are reported to flow well.  I think it was Alcaid who reported making 175 HP on a 1.6TD using one of them.

Steve.

[theman53]

The only thing about those manifolds is that they have a ton of volume to fill. Spool would be affected in a daily. Jet you don't have to worry about it, so flow is good, but for someone in a car on the road I would want a manifold that is as short as possible. Also with as little volume in the adaptor as possible.

Libby has done it many times to take 2 turbo flanges and welded them with a pipe in between to clock or make 2 different turbo flanges work together. That is something you could do with the VW manifold.