Difference in Nitrous outlet and Hsw jets

Reply Subscribe

Thread Tools

Search this Thread

Feb 22, 2011 | 03:00 PM

TA1364

Thread Starter

11 Second Club

iTrader: (11)

Joined: Aug 2007

Posts: 1,779

Likes: 3

From: Dayton, OH

Difference in Nitrous outlet and Hsw jets

Looking at possibly picking up a nitrous outlet plate to replace my hsw nozzle. I am wanting to spray a 200 shot but there is a pretty big difference in the jet sizes for this size of shot. HSW is 72/38 and n2o outlet is 78/46, Why?

Feb 22, 2011 | 09:21 PM

krissoto

TECH Resident

iTrader: (3)

Joined: Mar 2009

Posts: 863

Likes: 0

From: Bonne Terre, MO

Idk but I would like to know the diff as well. Maybe one is rated at flywheel hp, and one is at rwhp?

Feb 22, 2011 | 09:44 PM

Carter01

9 Second Club

iTrader: (11)

Joined: Oct 2007

Posts: 1,828

Likes: 0

From: South Ga

Quote:

Originally Posted by TA1364

Two main reasons:1. Those jets were determined a long time ago and were a safe starting point for the everyday slap a kit on and go spray weekend warrior guy and shouldn't hurt the motor. 2. They are still a safe starting point today if you are tuning by the plugs, for most systems they will be very rich but not all.

Dave or Chris will chime in I'm sure to give a more precise answer.

Feb 23, 2011 | 07:05 AM

TA1364

Thread Starter

11 Second Club

iTrader: (11)

Joined: Aug 2007

Posts: 1,779

Likes: 3

From: Dayton, OH

Carter you run a nitrous outlet setup, what were your 200 shot jets?

Sam

Feb 23, 2011 | 03:44 PM

camscam02

9 Second Club

iTrader: (21)

Joined: Apr 2006

Posts: 3,240

Likes: 1

From: sacramento, CA

It's based off flow calculations or should be. Pick a size and go. Don't get caught up on hp numbers. I use 72 as my "200" as well as most kits.

Feb 23, 2011 | 06:42 PM

Carter01

9 Second Club

iTrader: (11)

Joined: Oct 2007

Posts: 1,828

Likes: 0

From: South Ga

Quote:

Originally Posted by TA1364

Carter you run a nitrous outlet setup, what were your 200 shot jets?

Sam

78/44 but that was too rich, I should have played with it more but I was in too big of a hurry to go to the 250 shot

Probably would have ended up with a 41 fuel jet.

Feb 25, 2011 | 04:00 PM

Chris@NitroDaves

Guest

Posts: n/a

The difference is not only flow but also the orifice size of the passageways in the plate. Our jetting straight from us on the plate's is a little on the rich side.

Reply Subscribe