i have a gt3582r turbo kit and im currently using the buschur intake but the turbo inlet is 4" i would like to know if there is any company that sells a 4" intake pipe that remains the stock maf ?

 

just use a reducer coupler to get your intake mounted on the turbo

 

i already have a reducer for 4" to 3" but i want to get he turbo to breathe better ?

 

I am not sure it matters much if you got the maf in front of it anyway. My car has a 3" intake pipe on it and makes great power per psi I run. I do belive Mellon also has a 3" intake pipe when his car was ~600hp.

That being said I do plan to make a 4" pipe for my car, I just like to make things though I don't expect anything from it.

Fathouse

 

Dejon tool.

Maf is 3 and 1/8th 35r inlet is 4 inch, they make one with and without BOV attachment.

Scorke

 

You can always just make one. I did. 4 inch 45 degree tubing, 1 1/8 inch tubing, measure, cut take to shop to get welded and install. The only problem is the lower radiator hose gets in the way using a true four inch intake pipe. You will have to indent the pipe to clear the hose properly.

 

Or just buy yourself a GM IAT sensor go to the EcuFlash forum and search for speed density links or in the buschur project white build the links are post 297.

 

I'm running a 3" pipe with a 3 to 4" coupler at the turbo...DLL shows 701awhp before I ran out of fuel pressure. I had another tuning company contact me about my experience because he couldn't get a car to idle with a 4" pipe and 3" coupler at the MAS...he ended up make a 3" pipe and it idled good again *shrug*

 

duplicate

 

My friends at DSG just built me a 4" intake using a 4-3" a silicone coupler for the MAF. After reading Mellon's comments, I wonder if it will idle when I finally get it running...

 

yeah, I'm not saying it will be bad, I don't know if that other tuning company knew what they were doing or not, but I wanted to put that out there to warn people just in case. I don't think I've tuned one with a 4" intake pipe, I don't advise it for my customers since 3" works great for me.

 

I'm with ya Mellon, and I will advise of any ill effect's in a week or two when running. DSG's thought which I agreed with was moving the restriction of the 3" coupler as far away from the turbo inlet as possible would help in the power dept. I have both a 3" and a 4" now...Maybe when the car goes on the dyno I will try to do a back to back...

 

the 4" pipe isn't going to do anything for you...you still have a 3" restriction regardless.

if you have a 3" exhaust with a 2" kink, it doesn't matter where it is...it's still effectively a 2" exhaust.

 

i have a 4 inch pipe right off the turbo. and a 4 to 3 inch coupler to the maf. i have no issues at all.

 

good to know...so like I said, the other tuner that was picking my brain just didn't know how to tune for it most likely. I have no personal experience but wanted to share just in case.