Nitrous is working

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04-29-2011, 08:44 AM

#11

huey_33

2nd Gear Member

Thread Starter

Join Date: Sep 2004

Location: From Ohio, Stationed in NC

Posts: 454

Quote:

Originally Posted by tim2002gt

If the line was leaking, you probably weren't even getting a full 75hp worth of nitrous. Probably was running ultra rich like that.

Btw, what size are the jets you are running? My kit uses a .044 nitrous jet and a .028 fuel jet for a 75 shot. Basically, I'm wondering if your kit is rated at the crank or at the tire.

The 75 shots jet that were on the car are .042 and .024 while the 100 shot jets which are now on the car are .048 and .028. Now I have a quick question. When I took the car out last night and when the nitrous kicked in, the car shifted (automatic) at 6500RPM's. What is a good RPM on and RPM off to set the window switch at to ensure the nitrous don't cut out during my runs? I was thinking on at 3000RPM's and off at 6500RPM's.

Last edited by huey_33; 04-29-2011 at 08:52 AM.

04-29-2011, 09:00 AM

#12

Kmelfi11

4th Gear Member

Join Date: Dec 2007

Location: New Jersey

Posts: 1,787

Your RT doesn't effect your 1/4 mile time. Sometimes its better to not go for a good RT so you can focus on your launch. does 6500rpm seem a little high to anyone without cams?

04-29-2011, 11:10 AM

#13

huey_33

2nd Gear Member

Thread Starter

Join Date: Sep 2004

Location: From Ohio, Stationed in NC

Posts: 454

I keep reading that anything over 6000 RPM's is too high. So I'm about to change my shift points to around 5000-5500 and see how that works.

04-29-2011, 12:13 PM

#14

mrtstang

6th Gear Member

Join Date: Jan 2007

Location: MI

Posts: 5,884

I run mine from 2800-6000 rpm. It's worked like a charm since day one.

04-29-2011, 12:32 PM

#15

TRUEBLUE3934

4th Gear Member

Join Date: Sep 2009

Location: NC

Posts: 1,481

Quote:

Originally Posted by tim2002gt

On the dyno, .046 / .028 jets gave me a good A/F and made 70rwhp increase.

I would STRONGLY suggest putting the car on a dyno to figure out the correct jetting combinations for A/F ratio and actual rwhp increases.

For what it is worth, it took .060 / .035 jetting to get a good A/F and 100rwhp increase on my car.

LOL I said to get a 100shot tune, becasue I knew he would have the 100 jets in it very quickly.

04-29-2011, 01:55 PM

#16

bigbadstang

1st Gear Member

Join Date: Mar 2011

Location: Connecticut

Posts: 90

What kit u running?

04-29-2011, 03:42 PM

#17

huey_33

2nd Gear Member

Thread Starter

Join Date: Sep 2004

Location: From Ohio, Stationed in NC

Posts: 454

Quote:

Originally Posted by bigbadstang

What kit u running?

http://www.dynotunenitrous.com/store...?idproduct=254

Running that with an MSD digital window switch 8969 and my purge kit is coming tomorrow. Everything together has probably ran me around $700.

04-30-2011, 12:41 AM

#18

tim2002gt

3rd Gear Member

Join Date: Aug 2007

Location: Tulsa, OK

Posts: 670

Quote:

Originally Posted by TRUEBLUE3934

For what it is worth, it took .060 / .035 jetting to get a good A/F and 100rwhp increase on my car.

Really? Do you think it was because of the cams you are using? I am using a .057 nitrous jet and a .032 fuel jet and I picked up 128 rwhp with an a/f ratio just below 12:1. I ran back to back pulls with the same tune with and without the nitrous. Motor pull was 250 rwhp and nitrous pull was 378 rwhp. Torque was 292 and 474 ft/lbs.