4" intake compressor side turbo in stock location, what did you do with up-pipe?

2QUIK6

Turbo Milk Jug displacmnt
The MAF I have measures right in at 3 5/8" diameter, its an early 2000's Z06 MAF.
Thanks for the tips on where to find some reducers Mike! I have various ones laying around and an assortment of couplers, but I'm sure none will work for whatever I work out...and some pipe I have already ordered that I'm not sure will fit...always my luck :)
 

SCOOBY DOO

I'M NOT A MONSTER, I'M JUST AHEAD OF THE CURVE!!!
I use a plenum spacer and an angle adapter...and retain the 4 inch MAF pipe with the Z06 MAF.
 

horndog

Active Member
I ended up going with the 72MM Gn1 plenum and throttle body along with the IAC angle boss to retain the 4" intake.
This raises the gap between the 3" up pipe and moves the IAC motor out of the way.
Plus I run a speed density setup with XFI.
 

2QUIK6

Turbo Milk Jug displacmnt
I ended up going with the 72MM Gn1 plenum and throttle body along with the IAC angle boss to retain the 4" intake.
This raises the gap between the 3" up pipe and moves the IAC motor out of the way.
Plus I run a speed density setup with XFI.
Does the GN1 plenum already sit a little higher or do you still need a plenum spacer?
There's already an angled IAC boss on it, utlimately I need to get a larger TB...mines the old stocker with the Jay Jackson mod to make it larger...don't remember the exact width he used to port them out to, but it is clearly a bottle neck now in the flow.
 

m3x1c0

Bad luck Buick
I have a 4 inch inlet. Ill get some pics of it when Im back to the car. No fancy spacers or tricks just the angled IAC
 

horndog

Active Member
Does the GN1 plenum already sit a little higher or do you still need a plenum spacer?
There's already an angled IAC boss on it, utlimately I need to get a larger TB...mines the old stocker with the Jay Jackson mod to make it larger...don't remember the exact width he used to port them out to, but it is clearly a bottle neck now in the flow.
Yes, the GN1 is raised a bit, so no spacer is needed for the 4" pipe, and the throttle body already is provisioned with the IAC angle boss. The Accufab throttle body does not. My original intention was not to spend $600+ on the GN1, but after pricing out everything else and talking to others, it was almost even if I bought part by part.
 
I as well have a 4" MAF pipe and 3" up pipe, its just a mandrel bent exhaust tube from Napa.
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Sent from my SM-G935P using Tapatalk
 

2QUIK6

Turbo Milk Jug displacmnt
Something I just noticed on my car, the stock upper radiator hose support that connects to the altenator bracket is getting pushed down from the 3.5" pipe I had and is letting the hose rub some on one of the pulleys....so I need to fabricate a heavier support arm for the radiator hose.

I an ordering a new 72mm TB and GN1 plenum since there is a huge restriction there on mine now with the 3" uppipe and the double sleeved couple onto the stock TB now...probably doesn't help the methanol getting sprayed on it and puddling up behind the double coupler either.
 
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