Wtb Vnt S-60

[ironbird720]

The exhaust turbine off the original turbo I have is no good because it has a broken fin and I do not have any heat shields.I'm not using the stock exhaust manifold either,I have a ported one from FWDP.All I did was remove one of the studs and drilled the hole bigger so the stud on the vnt exhaust flange goes through.I think I'm going to port match the head to the intake and exhaust ports and possibly go with the bigger valves too.I'll try to get some pics of the turbo this weekend.

[90vntShadow]

Sounds awesome. Thanks. I will let you know when I get some pics of the manifold
that I ported and you can tell me what you think. What is the main difference between
the vnt and t-3 manifold? Is one stud location just off a little on the turbo flange?
Please let me know if you come acoss a vnt turbine shaft or heat shield.

[ironbird720]

I think I read somewhere that the only difference with the vnt exhaust manifold is that it is made with different material to withstand the heat but I'm not sure.And the vnt exhaust flange has the one stud on it so you have to take the stud off the exhaust manifold and drill it larger to allow the stud on the exhaust flange to pass through.If you do it the other way and drill the stud hole larger on the exhaust flange then the nut on the back doesn't sit flat when you tighten it up.The flange is sloped back there.Does that make any sense??

[90vntShadow]

You are correct the vnt manifold has a higher nickel content to withstand more heat.
I looked at both my turbo exhaust housings after you told me you were going to re-drill
some of the holes and match them up. I put both my turbo housings face to face, the
t03 and the vnt housing and the holes were all off quite a bit. This might work, but I
think you are going to have to message all the holes. After you do all this you will have
to make sure the flange port still lines up with the manifold, possibly do some port matching there as well. When are you going to put the new turbo on?

[ironbird720]

sorry now that i looked,my ported exhaust manifold from FWD-P is a t-2 and after drilling for the one stud all the rest line up perfectly.I'm going to put the turbo on as soon as I finished the 555 tranny upgrade on my shelby charger.But first I want to put it on the dyno so I can see what gains I get.I think I'm going to do a little head work too.

[90vntShadow]

Awesome, I would love to see some dyno numbers and hear how this works out for
you. I might be buying one of those in the future.

[ironbird720]

ok,FINALLY some vnt adapter pics!!Sorry about the wait.

[90vntShadow]

Thanks for the pics, I just have to figure out the correct spacing. I still do not have a good exhaust turbine yet.

[ironbird720]

OK,finally finished the SC and is now outside and the tona is in the garage.Tonight I started unbolting everything and should be able to pull the head tomorrow if I have time.I wanted to get dyno numbers before and after the setup but need the money elsewhere.Definately will get dyno results after the swap though.I will post pics as I go.

[90vntShadow]

Sounds great, I am looking forward to the results. Keep us posted.

[ironbird720]

head is off now and is ready for porting.I decided to pull the engine after all to clean everything up.I'm also going with forged pistons this time.Only had 20,000 km on previous rebuild and I'm already tearing her down again to go with a different route.After it is all done I might even throw on my nitrous kit as well.I'll try to post some pics.

[ironbird720]

undecided on what top end to use.should I use the ported 782 with FWDP ported exhaust and intake manifolds or should I use the 287 head with +1mm valves and a stock 2 piece intake and ported FM exhaust manifold.Someone help me make up my mind.thanks.

[90vntShadow]

I would post in the help section, and don't mention the word vnt and you will probably get a better response. I think the vnt section is pretty much dead except for a few die hards like you and me. LOL.

[The Pope]

as soon as you up the flow of the engine, the VNT will overboost for ever. Unless you want to replace the turbo with a powerstroke it is too small. Run a mandrel bent 2.5" exhaust with turbo muffler and cat. Not a big high flow 3" system. Grind the VNT arm in the turbine to open the VNT all the way. Polish the inside or the turbine and the exhaust manifold with a stone bit and 120 grind sand paper rolls. Ceramic coat inside and out the SV, turbine and exhaust manifold to keep the air hot and thin to get the exhaust out easier. Use sand paper rolls on the 782 head and run a stock 2 piece. Run a TBI cam with PT lifters. Buy a high flow big intercooler to lower the exhaust back pressure and make life easier on the turbine (same thing helps the SRT 4). Then run more boost, a 3 bar map and a FWD stage 4 computer with +20 injectors. consider the T28 turbo mod, the turbine shaft of a VNT is tiny thin. Hotter exhaust with coatings, opening up the VNT vains farther and lowering your exhaust pressure with a bigger IC is important.

The biggest mod for the VNT that would change everthing is TUs header. You can run then a ported stock valve head like Tylers or LWP or FWD or so on that has cut ports and cut combustion chambers. Then a F2 cam and a ported 2 piece. The Key is that the header is made to run a external wastegate. Grind the manifold and install the waste gate along with the VNT. Setup the car with a stage 4 computer and set it to 16 PSI. Then setup the external wastegate to 18 PSI. The second wastegate will only then work when the turbo is taxxed and keep it from spiking too far. This is a T28 / S60 compressor mod only setup, otherwise you'll way over spin the VNT. The exhaust lack of flow is why the VNTs can't make the power, that header with work will get them past that to an extent.

turbos

[SpiritedShelbys]

Ok don't bust my chops here but I'm trying to better understand my VNT. I've heard people say that opening the exhaust with a VNT is bad because it will overboost. Mine has always (at the gauge) spiked and held 15lbs. If you open the exhaust and increase the exhaust flow won't that just worsen the likelihood of overboost conditions? I'm considering the T-28 VNT, 2.5" catback ex, 16lb FWD computer, injectors, intercooler..etc.. the whole thing so I've been monitoring these posts.