94 GT nitrous questions...

[kwik50gtgt]

Hello guys I am new to this site.
I own a 87 GT S/C w/ 490rwhp (on pump gas) and a 94 (aode) daily driver w/ nos. My 94 GT ran a 13.8 w/ x pipe, catback, cold air, built tranny "no stall" and 410's. I want to get it in the 12's. I just got ZEX dry kit w/ bottle warmer, gauge and purge.

Now, I don't know much about nitrous so if you nitrous guys could help me out with this as far as letting me know THE BEST AND MOST SAFE timing, spark plug choice and gap and more useful trail and error info for a 75 or maybe 100 shot on a bone stock motor with 72k. I have 73mm maf and 24lb inj's from my other stang is it worth putting this on? And what else should I do, fuel pump, adj fuel reg, msd?

Basiclly what is needed to make my car last a long time and be reliable with nitrous and not go broke at the same time?

Thanks for any help guys...

Put your timing on 8 or 9 degrees btdc. Go one step colder in spark plugs. The brand really doesn't matter, except that you want to stay away from platinum plugs. They don't mix well with nitrous from what I've heard. I've used Autolites and NGK for years and they've suited me fine. Gap the plugs around .035-.040. If you have an aftermarket iginition you can get away with .055 according to the NOS tech. line. I run a 150 shot (NOS 5115 dry kit) with my timing on 8 degrees btdc and a .055 plug gap. But I have a Crane HI-6 ignition. Since you'll only be running a 75-100 shot, I'd put the timing at 10. The rule of thumb is to retard your timing 2 degrees from where you normally run it, for every 50hp. of a shot of the juice. I'd put the 73mm MAM on for sure...but the 24lb. injectors will do nothing for you. You wouldn't need those unless you were running aftermarket heads/cam/intake. You don't even really need to get a bigger fuel pump with a 75-100 shot...although it couldn't hurt. Because if you want to go faster...and I'm sure you will...you'll need a bigger fuel pump for anything over a 100hp shot.

[kwik50gtgt]

Thanks for your help,
I will give that a shot with timing and spark. That is what most people told me anyway but I tought I would go the extra mile and see what some others thought would be good.
Thanks again.

Oh, one more thing I am trying to hide the ZEX NMU but yet still have access to change jets. Where could I hide it w/ only 24" line and have access on a SN 95 body stlye "94"?

Thanks...

[JSFIRE79]

I run the 125 shot off a zex kit in my 93, and I used to use the autolite 23's gapped at 35.. car ran very reliable with 160,000 miles. I now have different heads and cam but still running the ZEX for a while... My suggestion is this start out using a colder plug and keep your timing at 10 and run the 75, then pull your plugs ( not just one) and read them...if they look good bump up to the 100 ( I always kept my timing at 10 for this) but lower yours to 8 and then repeat above......if all is good then hit 125 if it's all good after the run bump your timing a little... bump it a little bit at a time and see how it runs.....if your MPH is going up you should be alright if you start leveling off or drop then lower it back down. I ran 16 degrees on 110 race gas. with the 125 shot ran beautifully but I also had the fuel system and GT-40 heads and a Nitrous stick...Just rememer to read your plugs even at a 125 shot...

[bigwhitecobra]

Put the NMU in the Glove box, under the dash, or buy an extra fuse box cover and.......well, you get the idea.

As far as N2O goes, I'm sortof a newbie to it, so I don't have a whole lot of info on it for you. Sorry. Besides, everything already said is very good advice.

Anyway, good luck. Later.