question about nitruos

94cobra2 · 07-31-2002, 10:38 PM

Can I refill my bottle when its 1/4 to 1/2 way full or does it have to be empty to refill. BTW. I'm using the zex 75hp shot with timming at 9 with NGK V-power plugs 5 heat range with .041 gap. Do you thing I should run a colder plug with 125 shot. (ngk 5 is 1 colder than stock ngk) I heard 23 autolites work good. What is a good gap size. I'm going track frigay and I'll post results, 75 shot pulls...WOW

mean81GT · 08-01-2002, 12:33 AM

the tank can be refilled even when there is some left in there.

as far as plugs i think the 5 is too hot, maybe one plug colder. better safe than sorry

ultraflo · 08-01-2002, 01:22 AM

Dittos on the refill when it's half full... no prob.

IMHO, one step colder plugs should be fine w/ a 75 shot... but by all means you could try 2 steps colder, motor will idle a little richer... just be sure to check one or more plugs when you get to the end of the track (shut the motor off when you cross the 1/4 to get an accurate reading)... you could also invest in an EGT gauge to monitor your exhaust temp.

Plug gap? I run .035, haven't tried any larger... If .041 works for you then keep it there.

If you followed the Zex's instructions to the "T" then you should be fine as far as following their recommended tune-up... I'm not familiar with the Zex kits. I wouldn't run any less than 10* and run 93 octane pump gas or better.

Have fun!

Eric4Nitrous · 08-01-2002, 08:37 AM

Yes you can refill the bottle when it's half full. For nitrous i'd run the coldest plug you can find. Keep your timing around 10-11* and run some good gas as mentioned earlier. You'll be fine. I usually shut mine off right after i go through the quarter and pull it back with a four-wheeler. That's the only way you can get a accurate reading of the plugs.

Agent_4573 · 08-01-2002, 02:30 PM

I just put the zex kit in my car and i'm planning on using autolite 24's with it at like .041 gap. 24's are one heat range colder than stock but do you think the 23's would be better? Also the zex instructions say that you don't need to retard timing for a 75 shot but the 125 you should retard it 4 degrees from normal.

Eric4Nitrous · 08-01-2002, 04:54 PM

First of all quit dealing with autolite plugs. They foul WAY to easy and their not that good of a plug. I run a bosch platinum and a NGK plug. You can't go wrong with either one of them. ZEX is absolutely right. You have to retard your timing if you do indeed plan on running a 125 shot. 4-5 degrees is the norm for a nitrous motor with a 125 shot. Hope this helps.

Eric

94cobra2 · 08-01-2002, 08:09 PM

wow, thanks for the replies everybody. eric, your right. I was using autolight plugs#25 before the nitrous with no problems but they all fouled within the first 6 sec of the 75 shot. I replaced them with ngk v-power #5 with a .041 gap and no problems yet. Should I go a ngk #56 colder with the 125 shot. I also need to invest in a msd retard box, just a little less hassle. thanks guys.

Eric4Nitrous · 08-01-2002, 08:24 PM

I'd use the coldest plug i could find. Invest in that msd retard box and you'll be set. Good luck

07-31-2002, 10:38 PM	#1
94cobra2 Registered Member Join Date: May 2001 Location: St. Joseph, MI Posts: 33	question about nitruos Can I refill my bottle when its 1/4 to 1/2 way full or does it have to be empty to refill. BTW. I'm using the zex 75hp shot with timming at 9 with NGK V-power plugs 5 heat range with .041 gap. Do you thing I should run a colder plug with 125 shot. (ngk 5 is 1 colder than stock ngk) I heard 23 autolites work good. What is a good gap size. I'm going track frigay and I'll post results, 75 shot pulls...WOW __________________ 1994 mustang gt Zex 75-125 shot, BBK equel lentgh headers, off road x-pipe, flowmaster 2 chamber. bbk underdrives, FMS 3:73, MSD 6al ignition, BBK cold air induction, 70mm throttle body, C&L mass air, K&N cone. Pro 5.0. 96 corba rear buber, 1998 cobra wheels 17/8, BFG Comp TA ZR 275/40 rear,245/45 front Best ET 13.24@105.5

08-01-2002, 01:22 AM	#3
ultraflo NX dealer-man Join Date: Sep 1998 Location: Peoria, Illinois Posts: 977	Dittos on the refill when it's half full... no prob. IMHO, one step colder plugs should be fine w/ a 75 shot... but by all means you could try 2 steps colder, motor will idle a little richer... just be sure to check one or more plugs when you get to the end of the track (shut the motor off when you cross the 1/4 to get an accurate reading)... you could also invest in an EGT gauge to monitor your exhaust temp. Plug gap? I run .035, haven't tried any larger... If .041 works for you then keep it there. If you followed the Zex's instructions to the "T" then you should be fine as far as following their recommended tune-up... I'm not familiar with the Zex kits. I wouldn't run any less than 10* and run 93 octane pump gas or better. Have fun! __________________ RLS Racing! 93 LX 9.20 @ 147mph 03 Mach 1 12.39 @ 116mph

08-01-2002, 08:37 AM	#4
Eric4Nitrous Registered Member Join Date: Jan 2002 Location: Va Posts: 1,122	Yes you can refill the bottle when it's half full. For nitrous i'd run the coldest plug you can find. Keep your timing around 10-11* and run some good gas as mentioned earlier. You'll be fine. I usually shut mine off right after i go through the quarter and pull it back with a four-wheeler. That's the only way you can get a accurate reading of the plugs. __________________ 68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03

08-01-2002, 04:54 PM	#6
Eric4Nitrous Registered Member Join Date: Jan 2002 Location: Va Posts: 1,122	First of all quit dealing with autolite plugs. They foul WAY to easy and their not that good of a plug. I run a bosch platinum and a NGK plug. You can't go wrong with either one of them. ZEX is absolutely right. You have to retard your timing if you do indeed plan on running a 125 shot. 4-5 degrees is the norm for a nitrous motor with a 125 shot. Hope this helps. Eric __________________ 68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03

08-01-2002, 08:09 PM	#7
94cobra2 Registered Member Join Date: May 2001 Location: St. Joseph, MI Posts: 33	wow, thanks for the replies everybody. eric, your right. I was using autolight plugs#25 before the nitrous with no problems but they all fouled within the first 6 sec of the 75 shot. I replaced them with ngk v-power #5 with a .041 gap and no problems yet. Should I go a ngk #56 colder with the 125 shot. I also need to invest in a msd retard box, just a little less hassle. thanks guys. __________________ 1994 mustang gt Zex 75-125 shot, BBK equel lentgh headers, off road x-pipe, flowmaster 2 chamber. bbk underdrives, FMS 3:73, MSD 6al ignition, BBK cold air induction, 70mm throttle body, C&L mass air, K&N cone. Pro 5.0. 96 corba rear buber, 1998 cobra wheels 17/8, BFG Comp TA ZR 275/40 rear,245/45 front Best ET 13.24@105.5

08-01-2002, 12:33 AM	#2
mean81GT Registered Member Join Date: Nov 2001 Location: NY Posts: 299	the tank can be refilled even when there is some left in there. as far as plugs i think the 5 is too hot, maybe one plug colder. better safe than sorry __________________ I'm a glutton for punishment.

08-01-2002, 02:30 PM	#5
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	I just put the zex kit in my car and i'm planning on using autolite 24's with it at like .041 gap. 24's are one heat range colder than stock but do you think the 23's would be better? Also the zex instructions say that you don't need to retard timing for a 75 shot but the 125 you should retard it 4 degrees from normal. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

08-01-2002, 08:24 PM	#8
Eric4Nitrous Registered Member Join Date: Jan 2002 Location: Va Posts: 1,122	I'd use the coldest plug i could find. Invest in that msd retard box and you'll be set. Good luck __________________ 68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03

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