Making Nismo ducts

Rusty · 07-29-2012, 09:56 PM

Quote:

Originally Posted by djtodd

Yeah, what I was thinking was to go from the 4" opening to 2x3" outlets. 3" duct is rather easily acquired, and you could close one off if you didnt care to route 2 ducts to the rotor. Personally, I would rather have more airflow than less.

I made a rough mockup earlier today, but I'm just going to have to break down and cut the holes to get the angle just right.

Also, how to the oem ducts mount? I was thinking of a plate on the inside of the bumper. That way, I could make some studs into the duct that would go through the bumper and plate, secured by lock-nut or similar.

The way they mount is a bolt with a washer or pop-rivet in each corner. That's it. Nothing behind the bumper but a washer and nut. You have to be careful. These things are thin!

Rusty · 07-29-2012, 09:58 PM

Quote:

Originally Posted by Isamu

as soon as I acquire a set, I will give everyone a price, and turn around time

I'll text you tomorrow afternoon. After I get up from sleeping. OK?

ScGRaceR · 07-29-2012, 09:59 PM

can someone post a link to the oem ones? sorta confussed

djtodd · 07-29-2012, 10:13 PM

Don't have a direct link. They have been discussed on the forums. Its the same duct inlets that come on the 370z RC. They fit into the nismo front fascia, but require cutting. They are also redunculously expensive, which is why various people have been discussion frp alternatives.

I'll try to put up some pictures tomorrow of what I have so far. I'm pretty pleased with them, and total material cost will be...maybe $20. That's for the inlets. Still need to buy hoses and mounting hardware, but that is also a fairly trivial cost.

DarkJak · 07-29-2012, 11:05 PM

WOW $20? Anything less than $100 and people will be jumping on these. Looking forward to pics.

Isamu · 07-29-2012, 11:33 PM

Quote:

Originally Posted by DarkJak

WOW $20? Anything less than $100 and people will be jumping on these. Looking forward to pics.

they won't be 20 bucks... I would venture to say 300-400 for a SET, would be a reasonable price..

Rusty · 07-30-2012, 12:24 AM

Quote:

Originally Posted by djtodd

Don't have a direct link. They have been discussed on the forums. Its the same duct inlets that come on the 370z RC. They fit into the nismo front fascia, but require cutting. They are also redunculously expensive, which is why various people have been discussion frp alternatives.

I'll try to put up some pictures tomorrow of what I have so far. I'm pretty pleased with them, and total material cost will be...maybe $20. That's for the inlets. Still need to buy hoses and mounting hardware, but that is also a fairly trivial cost.

Page 5 of my journal is a couple of pictures of them sitting on my work bench.

Click on the link in my sign.

takjak2 · 07-30-2012, 07:37 PM

In for ducts!

ww77 · 07-30-2012, 11:57 PM

In here.

Rusty · 07-31-2012, 12:53 AM

Here's the factory Nismo brake ducts that list fir $612.00 each. Also a 4" to 2" reducer that I have to machine so that it slides inside of the duct to shorten the overall length of it.

ChrisSlicks · 07-31-2012, 06:38 AM

4" duct is pretty massive, 4x the air flow vs 2" duct. If you want to make the most of it you could do a 4" to 2x 3" splitter and produce an alternate hub flange that accepts 2x3" (hardcore) or direct one hose to cool the brake caliper.

Teams that run multiple brake ducts to the rotor usually just block one off if they are running at a track that isn't that demanding on brakes in order to get the temperatures into the ideal zone.

Dwnshift · 07-31-2012, 06:59 AM

We run 2 ..3" off of the 4"
Both direct airflow to the front brakes.

ChrisSlicks · 07-31-2012, 07:15 AM

Quote:

Originally Posted by Dwnshift

We run 2 ..3" off of the 4"
Both direct airflow to the front brakes.

Like I said ... hardcore

takjak2 · 07-31-2012, 03:44 PM

Could use one of these Y-Connector Dust Collection Fitting - Rockler Woodworking Tools
and two of these per side Hose Reducers - Rockler Woodworking Tools
I think there's plenty of space.

It's a few extra parts and not a perfect Y split, but pre-made plastic that's cheap.

djtodd · 07-31-2012, 03:52 PM

I made mine out of fiberglass, using some pvc as templates. Turned out well for 30 minutes work.

07-29-2012, 09:59 PM	#18 (permalink)
ScGRaceR Enthusiast Member Join Date: Mar 2010 Location: 33908 Posts: 382 Drives: 2010 Nismo,2008 R32 Rep Power: 15	can someone post a link to the oem ones? sorta confussed __________________ 2010 PW Nismo: GT-R Start / Stop \| Kenwood Navi / DVD \| Escort X50 \| F.I 18' CF \| F.I Resonated Test Pipes \| PasswordJDM \| Post MAF Tubes \| K&N Drop In's 297 RWHP 9/25/11 WTB SPARE RIM TIRE. PM ME

07-30-2012, 07:37 PM	#23 (permalink)
takjak2 A True Z Fanatic Join Date: Feb 2011 Location: Sterling, VA Posts: 1,922 Drives: Legit Racecar 370Z Rep Power: 142	In for ducts! __________________ Mods \| Stuff \| Things \| Seat Time \| Nismo facebook.com/TeamSparrowSpeed

07-31-2012, 06:38 AM	#26 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	4" duct is pretty massive, 4x the air flow vs 2" duct. If you want to make the most of it you could do a 4" to 2x 3" splitter and produce an alternate hub flange that accepts 2x3" (hardcore) or direct one hose to cool the brake caliper. Teams that run multiple brake ducts to the rotor usually just block one off if they are running at a track that isn't that demanding on brakes in order to get the temperatures into the ideal zone. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

07-31-2012, 06:59 AM	#27 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	We run 2 ..3" off of the 4" Both direct airflow to the front brakes. chknhawk likes this.

07-31-2012, 03:44 PM	#29 (permalink)
takjak2 A True Z Fanatic Join Date: Feb 2011 Location: Sterling, VA Posts: 1,922 Drives: Legit Racecar 370Z Rep Power: 142	Could use one of these Y-Connector Dust Collection Fitting - Rockler Woodworking Tools and two of these per side Hose Reducers - Rockler Woodworking Tools I think there's plenty of space. It's a few extra parts and not a perfect Y split, but pre-made plastic that's cheap. __________________ Mods \| Stuff \| Things \| Seat Time \| Nismo facebook.com/TeamSparrowSpeed

07-29-2012, 10:13 PM	#19 (permalink)
djtodd Track Member Join Date: Jun 2012 Location: Lexington, SC Posts: 932 Drives: 2012 Nismo TT Rep Power: 3398	Don't have a direct link. They have been discussed on the forums. Its the same duct inlets that come on the 370z RC. They fit into the nismo front fascia, but require cutting. They are also redunculously expensive, which is why various people have been discussion frp alternatives. I'll try to put up some pictures tomorrow of what I have so far. I'm pretty pleased with them, and total material cost will be...maybe $20. That's for the inlets. Still need to buy hoses and mounting hardware, but that is also a fairly trivial cost.

07-29-2012, 11:05 PM	#20 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,397 Drives: 2009 370Z Rep Power: 16804	WOW $20? Anything less than $100 and people will be jumping on these. Looking forward to pics.

07-30-2012, 11:57 PM	#24 (permalink)
ww77 Base Member Join Date: May 2011 Location: Germany Posts: 45 Drives: On the Autobahn Rep Power: 14	In here.

07-31-2012, 03:52 PM	#30 (permalink)
djtodd Track Member Join Date: Jun 2012 Location: Lexington, SC Posts: 932 Drives: 2012 Nismo TT Rep Power: 3398	I made mine out of fiberglass, using some pvc as templates. Turned out well for 30 minutes work.

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