3.5" MAF and Compressor Inlet/Outlet Sizes

[Blown&Injected]

About the pipe that will accept the 3.5" MAF; does the pipe gradually shrink down to a smaller size to fit the stock turbo?

I have what I'm sure is considered a stock replacement chrome MAF pipe. My Turbonetics 60-1 does not have the bell like the stock turbo. The MAF end goes directly to the stock MAF and the turbo end goes to the turbo except that I need to have a piece of hose over the inlet, then the hose on the MAF pipe goes over the inlet/small piece of hose spacer.

It is not the smoothest way to do it all IMO. Does the new set up for the 3.5" MAF clean it up a bit? The stock MAF is 3 1/8" to the turbo that is 2 7/8" (the reason for the piece of hose spacer); then the outlet on the turbo is about 2" and my FMIC pipe is 2 1/2". Is there a turbo with a compressor housing that will take a clean, straight thru 3.5", from MAF to inlet, and outlet with a 2.5" that will not require the adapter hose I now use? - Maybe something that will go into the 10's, or max out my MSD 50's - which I believe would be high 10's.

Thanks,

 

[QuickWrench]

does the pipe gradually shrink down to a smaller size to fit the stock turbo?

I don't think so. I wouldn't want it to, anyway.

Is there a turbo with a compressor housing that will take a clean, straight thru 3.5", from MAF to inlet, and outlet with a 2.5" that will not require the adapter hose I now use?

If there is, it's probably on a 8 or 9-second car. Those are massive portal sizes.

I've done a ton of custom cold-air kits. Depending on the size of the inlet bell/turbo inlet, I machine a piece of aluminum 1 1/2" - 2" long to fit on the inlet bell, and taper out to the MAF pipe/hose size. I don't like the idea of just flanging the turbo inlet to 3 1/2" or 4" [whatever the MAF hose size is], and sticking the hose/pipe on there. It's ugly, and doesn't provide a smooth tract for the incoming air to the turbine housing.

 

[Blown&Injected]

Why would it be bad to have the MAF pipe taper down to the inlet? Seems like it would be the smoothest way - to have it taper across the entire length of the pipe?

Anyway, it looks like it goes from 3" to 4" inlets from what I could find. PTE has a nice site with lots of choices and a bit of good info about every one of the offerings.

This looks like a nice one - any ideas or thoughts on this unit?

Vendor : Precision
Product Type : Buick Performance 3-Bolt
Product Name : TE63-1

Comes with Garrett Compressor Cover - 3" Inlet and 2.5" Outlet, 63mm 56 trim comp wheel, P trim turbine wheel, .63 or .85 A/R.
For mid 10 second applications, 3400 minimum stall required.

These turbo's require a specific wastegate actuator for true bolt-on compatability, sold seperately.

Supports up to 715 hp at the flywheel


Not sure what the "specific wastegate part means? Looks like it says that for all the choices.

 

[OneLethal87GN]

This turbo actually has a 4" inlet, not 3". It does have the 2 1/2" outlet though. I just put this turbo on my car. A hole drilled in the middle of the wastegate bracket will enable you to put the stock wastegate on this turbo. It is how mine was put on.