Stillen Air to Air setup

JWillis72 · 01-08-2016, 05:35 PM

Something still isn't right, he worked on the AFR but it's still not making enough boost.

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JWillis72 · 01-08-2016, 05:36 PM

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Spooler · 01-08-2016, 07:41 PM

Pressure test the system. Cap off the engine side with a PVC cap that will fit the diameter. Do the same at the supercharger side and tap a whole for an air-chuck fitting. Test away with compressed air if you haven't done it before.

JWillis72 · 01-08-2016, 07:49 PM

We have, we are thinking it might be the headers now.

Rusty · 01-08-2016, 09:09 PM

It's been mention before in the forum that headers lower boost pressure with the Stillen SC. By how much, I don't know.

JWillis72 · 01-08-2016, 09:17 PM

Quote:

Originally Posted by Rusty

It's been mention before in the forum that headers lower boost pressure with the Stillen SC. By how much, I don't know.

I agree and know that but I changed the sc pulley that should add 2-3psi and the impeller should add 15%. I can't imagine it not making mare than the 8 psi it did before.

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Z&I · 01-08-2016, 09:33 PM

Quote:

Originally Posted by JWillis72

I agree and know that but I changed the sc pulley that should add 2-3psi and the impeller should add 15%. I can't imagine it not making mare than the 8 psi it did before.

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I had the Stillen 9lb pulley + Vortech Impeller + PPI Long Tube Headers and made 11.9 lbs of boost.
Dyno'd @ 483rwhp and 378tq ... but it wasn't running quite right.
Blew the motor 1st time down the 1/4 mile when I lifted past the traps [12.3 @116.9]

StillenZ84 · 01-08-2016, 09:43 PM

Quote:

Originally Posted by JWillis72

I agree and know that but I changed the sc pulley that should add 2-3psi and the impeller should add 15%. I can't imagine it not making mare than the 8 psi it did before.

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Yeah its hard to believe that you would lose that much pressure from just the headers. No way. Is your BOV possibly letting some pressure out when it shouldn't? Obviously you didn't go to redline and would prob gain a pound or two more from 6500 rpm.

Jayhovah · 01-08-2016, 10:06 PM

Quote:

Originally Posted by JWillis72

I agree and know that but I changed the sc pulley that should add 2-3psi and the impeller should add 15%. I can't imagine it not making mare than the 8 psi it did before.

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I would think that if the increased flow from performance headers were causing your drop in boost, you would still be seeing pretty high numbers on the dyno even with the psi down. Just thinking out loud.. I am not an expert.

JWillis72 · 01-09-2016, 08:35 AM

Quote:

Originally Posted by Jayhovah

I would think that if the increased flow from performance headers were causing your drop in boost, you would still be seeing pretty high numbers on the dyno even with the psi down. Just thinking out loud.. I am not an expert.

We feel the same way. I still have the Stillen 9lb pulley to add more boost if needed but I still feel something isn't right on the car.

Optimiser · 01-08-2016, 10:41 PM

I have Stillen headers, high flow cats and catback exhaust and achieved 380 whp with just under 8 psi boost and a completely stock Stillen SC setup/kit , but with Uprev custom tune.

EVOHUNTER · 01-09-2016, 09:25 AM

Somethings not right, is your belt slipping?

it has to be really tight on this setup, like REALLY tight.

swiss370Z · 01-09-2016, 10:13 AM

Quote:

Originally Posted by EVOHUNTER

Somethings not right, is your belt slipping?

I think the same

Z&I · 01-09-2016, 11:11 AM

Too manyy Twists and Turns in the piping can also steal boost pressure.

EVOHUNTER · 01-09-2016, 12:01 PM

Quote:

Originally Posted by Z&I

Too manyy Twists and Turns in the piping can also steal boost pressure.

This is true, but My Air to Air has more piping and more bends.

I made 7.7 psi at 5100rpm. Stock impeller with a 2.75" on blower pulley.

I don't think the piping/routing is the problem.

01-08-2016, 09:09 PM	#5 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,410 Drives: 2011 Nismo GM 6M Rep Power: 2684438	It's been mention before in the forum that headers lower boost pressure with the Stillen SC. By how much, I don't know. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-09-2016, 09:25 AM	#12 (permalink)
EVOHUNTER Track Member Join Date: Jul 2011 Location: Edmonton, Canada Posts: 681 Drives: BOOSTED3-7-0 Rep Power: 15	Somethings not right, is your belt slipping? it has to be really tight on this setup, like REALLY tight. __________________

01-09-2016, 11:11 AM	#14 (permalink)
Z&I Enthusiast Member Join Date: Feb 2013 Location: New Jersey Posts: 410 Drives: '09 370z 6MT FI Rep Power: 13	Too manyy Twists and Turns in the piping can also steal boost pressure. __________________ . BB

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01-08-2016, 05:35 PM	#1 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	Something still isn't right, he worked on the AFR but it's still not making enough boost. Sent from my iPhone using Tapatalk

01-08-2016, 05:36 PM	#2 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	Sent from my iPhone using Tapatalk

01-08-2016, 07:41 PM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,021 Drives: 2013 Nismo 370z Rep Power: 2684393	Pressure test the system. Cap off the engine side with a PVC cap that will fit the diameter. Do the same at the supercharger side and tap a whole for an air-chuck fitting. Test away with compressed air if you haven't done it before.

01-08-2016, 07:49 PM	#4 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 45	We have, we are thinking it might be the headers now.

01-08-2016, 10:41 PM	#11 (permalink)
Optimiser Enthusiast Member Join Date: Mar 2013 Location: Australia Posts: 456 Drives: 2012 Nissan 370Z MT Rep Power: 20145	I have Stillen headers, high flow cats and catback exhaust and achieved 380 whp with just under 8 psi boost and a completely stock Stillen SC setup/kit , but with Uprev custom tune.