Jet size versus HP - Kawasaki Forum :: KawasakiWorld.com
 
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post #1 of 3 Old 01-30-2010, 03:12 AM Thread Starter
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Jet size versus HP

I've been looking thru old posts, and on various places on the web.

Trying to figure out how much hp for each jet size, based on 900 PSI bottle pressure.. less pressure = less hp.

Here is what I have so far:

NOS jets

.42 = 60 hp
.38 = 40 hp
.28 = 28-32 hp
.26 = 26 hp
.23 = 20 hp
.20 = 15 hp
.18 = 12.5 hp
.16 = 10 hp

NX jets

.31 = 35 hp
.35 = 50 hp
.41 = 75 hp

Schnitz racing single nozzle jetting:

14 - 6hp
16 - 9hp
18 - 12hp
20 - 15hp
22 - 17hp
24 - 20hp
26 - 25hp
28 - 30hp
30 - 34hp
32 - 38hp
34 - 40hp
36 - 45hp
38 - 50hp
40 - 55hp
42 - 65hp


From memory of the old car days, seems like the NX make a little more HP per size...

The smaller sizes I extrapolated from MPS Spider page, divided by 4 per HP rating...

Any input is greatly appreciated and we'll have it all in one spot.. I'll just keep editing this initial post

thanks!

00: Black-n-flamed, Hindle, BMC, Marchesini, Penske, Racetech, EBC, Russell, PCv
http://www.freewebs.com/heads_up_rac...ikerebuild.htm

RIP Pigpen2000... we'll ride again soon!!

Last edited by texlurch; 02-04-2010 at 07:21 AM.
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post #2 of 3 Old 02-04-2010, 06:28 AM
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not sure if this will help, but here ya go tex!

Schnitz Racing Dry Nitrous Jetting and Recommendation Chart

*For Fuel Injected 4 Cylinder Motorcycles (one injector per cylinder) with Single Nitrous Jet.

Nitrous Jet Horsepower gain 600cc 750cc 1000cc 1300+cc Fuel % increase
14 6hp Stock Stock Stock Stock 3%
16 9hp Stock Stock Stock Stock 3%
18 12hp Stock Stock Stock Stock 5%
20 15hp Stock Stock Stock Stock 5%
22 17hp Stock Stock Stock Stock 8%
24 20hp Stock Stock Stock Stock 8%
26 25hp Stock Stock Stock Stock 10%
28 30hp Stock Stock Stock Stock 10%
30 34hp Mod Mod Stock Stock 12%
32 38hp Mod Mod Mod Stock 12%
34 40hp Mod Mod Mod Stock 15%
36 45hp Mod Mod Mod Stock 15%
38 50hp Mod Mod Mod Stock 17%
40 55hp Mod Mod Mod Mod 20%
42 65hp Mod Mod Mod Mod 22%



Stock - 93 Pump Gas, Stock Engine, Stock Timing
Mod - Engine Modifications Required (Pistons, Rods, Valves, Valve Springs)
Horsepower increases as measured at rear wheel.
Every 10 horsepower can reduce your 1/4 mile ET as much at .1 seconds or more.
This Chart is just a guideline. There are may variables, such as nozzle type and distribution
Note: If your motorcycle has 8 injectors (2 per cylinder), you will need to increase fuel by 3 times that of the chart. Example: 1000cc engine with 30 jet. Chart for 1 injector per cylinder show to add 12% more fuel. For an engine with 2 injectors per cylinder, 36% more fuel should be added. This is just a guide. Dyno tuning is the best way to ensure a safe fuel curve.

"Death is Certain, Life is Not"
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post #3 of 3 Old 02-04-2010, 07:21 AM Thread Starter
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Thanks! Thats pretty much in line with what I calculated.. I need to find a good one for the NX jets as well.

00: Black-n-flamed, Hindle, BMC, Marchesini, Penske, Racetech, EBC, Russell, PCv
http://www.freewebs.com/heads_up_rac...ikerebuild.htm

RIP Pigpen2000... we'll ride again soon!!
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