Stock post MAF accordian tube question???

Modshack · 04-28-2010, 06:29 PM

Quote:

Originally Posted by ddvette9

good responses so far. but i was looking to see any chemistry/biology majors out there that can comment on the heat handling of silicone hoses vs the plastic hoses and maybe if there is any actual physics involved in air traveling through the corrugated stock tubes vs the smooth silicone .

I honestly don't think you're going to "notice" a difference. There has to be small improvements in flow though as smooth wall tube will obviously flow better than a corrugated one that would tend to disrupt smooth flow. Generally, a series of small improvements often add up to measurable gains, but just this one will not be a $100 kick in the pants. I've done both the Cobb and Generic 45 degree 2.75 elbows, but they've been in concert with my custom CAI mods...I didn't notice any change when I went from the stock hoses to the smooth walled silicone (both with my filters installed)

Generic hoses with custom PCV line take-offs on my car (before the Cobb's were available):

My friend Zpirate's car with the Cobb hoses:

davewittesg37 · 07-02-2013, 04:48 PM

Quote:

Originally Posted by Modshack

I honestly don't think you're going to "notice" a difference. There has to be small improvements in flow though as smooth wall tube will obviously flow better than a corrugated one that would tend to disrupt smooth flow. Generally, a series of small improvements often add up to measurable gains, but just this one will not be a $100 kick in the pants. I've done both the Cobb and Generic 45 degree 2.75 elbows, but they've been in concert with my custom CAI mods...I didn't notice any change when I went from the stock hoses to the smooth walled silicone (both with my filters installed)

Generic hoses with custom PCV line take-offs on my car (before the Cobb's were available):

My friend Zpirate's car with the Cobb hoses:

you and another member said you used stock maf tubes. What do you mean? Did you cut the maf out of the airbox or get a replacment?

1st · 07-02-2013, 05:18 PM

Ya, is that smog legal especially in California? Where did you purchase the filter covers?

Modshack · 07-03-2013, 07:40 AM

Quote:

Originally Posted by davewittesg37

you and another member said you used stock maf tubes. What do you mean? Did you cut the maf out of the airbox or get a replacment?

My original set-up used stock MAF tubes, cut from a spare OEM box

Quote:

Originally Posted by 1st

Ya, is that smog legal especially in California? Where did you purchase the filter covers?

I fabricate an intake for Audi's and VW's. Tubes are heat insulated 5 layer: Steel, Phenolic tube, Foil, Insulation, and another layer of foil. I no longer make these for the 370Z..Haven't had this car for a few years now..

1st · 07-03-2013, 09:37 AM

Modshack you did a good job on the covers they look excellent. Good craftsmanship. These would be nice to add to the K&N sri's or replace the black covers on the Stillen G2’s.

Modshack · 07-03-2013, 09:58 AM

Quote:

Originally Posted by 1st

Modshack you did a good job on the covers they look excellent. Good craftsmanship. These would be nice to add to the K&N sri's or replace the black covers on the Stillen G2’s.

Thanks! My production part for Audi/VW engines is a little more involved with a flow diverter and velocity stack style inlet:

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07-02-2013, 05:18 PM	#3 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,710 Drives: Platinum Z Rep Power: 1618	Ya, is that smog legal especially in California? Where did you purchase the filter covers?

07-03-2013, 09:37 AM	#5 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,710 Drives: Platinum Z Rep Power: 1618	Modshack you did a good job on the covers they look excellent. Good craftsmanship. These would be nice to add to the K&N sri's or replace the black covers on the Stillen G2’s.