How much nitrous can I spray

Steves LX · June 6th, 2007, 03:46 PM

I have a 89 LX that I am currently spraying 75HP dry thru TB. This is a ZEX kit and it automatically adjusts fuel pressure through a fuel jet and vacum. My timing is set at 12 degrees right now. I want to bump up my shot up to 100 HP but according to the tuning sheet that came with the kit it says to retard my timing 2 degrees. And that would actually be retarding it to 8 degrees seeing they use the factory specs. I have a F303 cam and the car runs like absolute dog crap at anything under 12 degrees. As a matter of fact it most of the time stalls out at 10 degrees and when it does idle the whole motor shakes and it idles at around 400-500 RPMS. So can I spray 100shot at 12 degrees advanced safely and w/out detonation or not? My kit is a ZEX 5.0 dry kit part # 82015. I am also using a ZEX traction control window switch. I have it set up to spray from 3000-5500 and to start spraying in 3rd gear and on. I have been considering programming it to start spraying in 2nd gear but even with drag radials I think I will lose traction spraying in 2nd gear ecspecially since its going to start as soon as I hit second under WOT. But I really need to know about the safety of the 100 shot at 12 degrees timing. My engine is as follows:
302 stock block with new rings seals bearings(about 3000 miles on them now. my rods and stock pistons reconditioned)
Edelbrock 5.0 performer intake manifold
75MM BBK TB
73MM C&L MAF
24# injectors
255LPH holley fuel pump
BBK fuel pressure regulator
MAC CAI
F303 cam
WC T5 tranny
Aluminum drive shaft
BBK full length headers 2 1/2 flowmaster exhaust

03 R Code · June 6th, 2007, 06:48 PM

Try it out and listen for detonation. Get some cooler-than-stock spark plugs and maybe even some 100 octane if you can. If you hear even the slightest detonation let off. It'll blow your engine in a heart beat.

homebrewed · June 6th, 2007, 07:09 PM

Originally Posted by 03 R Code

Try it out and listen for detonation. Get some cooler-than-stock spark plugs and maybe even some 100 octane if you can. If you hear even the slightest detonation let off. It'll blow your engine in a heart beat.

+1 for the plug recommendation. I contacted NGK and they recommed the Iridium IX plug for N20 applications. When I get to spraying my Fox, I'm switchin' to 'em...

UR6IX is the NGK part number for our cars bro. Thats 2 ranges colder than stock. Thats what I'm puttin' in my car...

Here's the web address and OE plug chart...
http://www.ngksparkplugs.com/part_finder

Regency 2007 · June 6th, 2007, 07:22 PM

My tuner recommends no higher than 120shot on an internally sock mustang unless you want to hurt the life of your engine

86_Notch · June 6th, 2007, 10:43 PM

you won't have anyproblems spraying a 125 shot as long as you get some autolite 24s and you can run 12 degrees as long as you have 93 octane , btw i always replace the stock fuel pump when i spray my cars,. i've had 3 mustangs with the zex dry kit and haven't had any problems, fyi the zex dry kit will support a 200 shot ( they just don't advertise it ) youu have to buy different jets, i've personally sprayed a 175 with it and didn't have problems, and 2 of my buddies have used the 200 shot several times and have run in the 11s with only bolt on stangs

June 6th, 2007, 03:46 PM	#1
Steves LX Newbie Join Date: Nov 2006 Posts: 32	How much nitrous can I spray I have a 89 LX that I am currently spraying 75HP dry thru TB. This is a ZEX kit and it automatically adjusts fuel pressure through a fuel jet and vacum. My timing is set at 12 degrees right now. I want to bump up my shot up to 100 HP but according to the tuning sheet that came with the kit it says to retard my timing 2 degrees. And that would actually be retarding it to 8 degrees seeing they use the factory specs. I have a F303 cam and the car runs like absolute dog crap at anything under 12 degrees. As a matter of fact it most of the time stalls out at 10 degrees and when it does idle the whole motor shakes and it idles at around 400-500 RPMS. So can I spray 100shot at 12 degrees advanced safely and w/out detonation or not? My kit is a ZEX 5.0 dry kit part # 82015. I am also using a ZEX traction control window switch. I have it set up to spray from 3000-5500 and to start spraying in 3rd gear and on. I have been considering programming it to start spraying in 2nd gear but even with drag radials I think I will lose traction spraying in 2nd gear ecspecially since its going to start as soon as I hit second under WOT. But I really need to know about the safety of the 100 shot at 12 degrees timing. My engine is as follows: 302 stock block with new rings seals bearings(about 3000 miles on them now. my rods and stock pistons reconditioned) Edelbrock 5.0 performer intake manifold 75MM BBK TB 73MM C&L MAF 24# injectors 255LPH holley fuel pump BBK fuel pressure regulator MAC CAI F303 cam WC T5 tranny Aluminum drive shaft BBK full length headers 2 1/2 flowmaster exhaust

June 6th, 2007, 06:48 PM	#2
03 R Code Hardcore Enthusiast unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 2,875	Try it out and listen for detonation. Get some cooler-than-stock spark plugs and maybe even some 100 octane if you can. If you hear even the slightest detonation let off. It'll blow your engine in a heart beat. __________________ Political correctness is a doctrine fostered by a delusional, illogical, liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

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June 6th, 2007, 07:22 PM	#4
Regency 2007 Hardcore Enthusiast F-150 FX4 Join Date: May 2007 Location: Memphrica Posts: 1,152	My tuner recommends no higher than 120shot on an internally sock mustang unless you want to hurt the life of your engine

June 6th, 2007, 10:43 PM	#5
86_Notch Enthusiast 1986 lx notch 10.78 @ 124.96 Join Date: Mar 2007 Location: Delaware Posts: 720	you won't have anyproblems spraying a 125 shot as long as you get some autolite 24s and you can run 12 degrees as long as you have 93 octane , btw i always replace the stock fuel pump when i spray my cars,. i've had 3 mustangs with the zex dry kit and haven't had any problems, fyi the zex dry kit will support a 200 shot ( they just don't advertise it ) youu have to buy different jets, i've personally sprayed a 175 with it and didn't have problems, and 2 of my buddies have used the 200 shot several times and have run in the 11s with only bolt on stangs

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