I was doing some reading on the Turbonetics Parts list and noticed that the 50 trim comes with a 4" inlet. The 46 trim has a 3" available, and a 2.75. How much does this matter if you are running a filter (As I am) I got the 46 trim, Stage III exhaust. .50 on the intake and .63 on the exhaust just like you recomended. With the .25" difference hurt me on power over the 3" Why is the 50 trim the only one in the T04E setup to come with 4" inlet.

Thanks for the recomendation on the turbo, contrary to what some other people told me I went with your Ideas Rob. 300+whp at 15lb here I come... Well me and my TEC II :D

Danny

The 46 trim inlet or the one that comes either 3" or 2.75" (O.D.) is the same either way. It starts out as a 3", and they shave off 1/4" from the outside to make it a 2.75". This means ABSOLUTELY nothing either way because the inside of the inlet (I.D.) is the same in either case. I spoke to turbonetics myself about this very question last month and this info is from them directly.

They do this because they have some applications for this turbo (i.e. Buick Grand National) that bolts right up to the stock hardware in the 2.75" size.

Thanks for the info.

BTW Nice pic in the signature...

What size compressor housing comes standard if you do not specify on the FMAX.

I bought a used one and thinking it was a 50 trim. looking at the Turbonitics website its def. not a 50 trim because it has the 2.75" inlet. it has .50 a/r on it and M33 near the inlet.

anyone know what size this is?

I think that F-Max comes standard with the 3" inlet.

The Cobra MAF is very close to 3" (IIRC), so this works out well.

3" or 2.75", it doesn't matter much. I would run the one that fits the best and works with the air filter you want to run.

Yeah I got screwed by F-max because they sent me the 2.75" one. The 3" one is standard for the Stage II. I have everything else Stage II so I don't know why they made the mistake.

The Cobra MAF is 3" and the F-Max Stage II inlet pipe for the Cobra MAF is HUGE and is also 3". The I.D. on the Cobra MAF is like a 1/16" smaller than 3". I really had to squeeze the 3" rubber coupling down to the compressor inlet ALOT. But unless I point it out to you in person you don't even notice it.

Well, that is most people, you Rob would probably notice it. :)

Well I was planing on 3" piping from the Cobra MAF to the Turbo Inlet as well.

Rob or anyone else that knows.

What would be a safe way to fit a 3" silicone coupling over the 2.75" inlet. I need somthing as a shim. Maybe some kind of tape like duct tape? Not to sure about the heat issues but there should be nice cool air comming in. Or maybe a 2.75" ruber hose cut as a shim?

Any suggestions. besides the easy one of buying a Reducer Coupling..:)

Thanks,

You see in this pic, I have a 3" coupling squeezed down to 2.75". You can go down 1/4" in size no problem.

http://personal.bellsouth.net/lig/f/t/fthomasr/Install/MVC-516F.jpg

I had to loosen that coupling and pull it off the inlet about 2 days after that pic was taken and I had to literally peel it off. It was SEALED.

You do NOT want to use duct tape built up or even a small rubber piece to step it up to 3". I talked specifically to a John Deere tractor turbo engine shop and they strongly recommended against that. He also agreed that clamping down no more than 1/4" is fine. If you can, buy at least one t-bolt clamp for doing this. T-bolts are awesome.

Hey Tom what coating is that on the exhaust housing?

Danny