Hey guys im new to this nitrous thing but I am picking up a kit from a local guy and i want to run a 75 shot. I know I need colder plugs to do so, and those are on their way from club plug. Do I need gauges to run a 75 shot? or will I be ok as is? If i get a fuel computer would that be enough?
Thanks
Zack

 

Its not a bad idea to get a 190 high flow fuel pump and maybe an egt gauge, which I have fo sale.

 

you are going to want to run a nitrous pressure gauge, but I wouldnt worry about anything else, like putting a colder plug in for a 75 shot. just make sure the kit is designed for a Fuel Injected setup.

 

bottle warmer, nitrous gauge, 1 step colder plugs gapped around .038 and you should be fine

 

so i bought my kit today, i have 1step colder plugs, bottle warmer, and n20 pressure gauge on my bottle with a fpss. think ill be good?

 

some kind of rpm switch to kill the nitrous right before the fuel cut-off this is not a must have but does offer peice of mind also if you do not have it a free flowing exhaust will help

 

Sorry to jack this some, but would an exhaust cut-out right after the headers be good?

 

i have a y pipe and sp1 catback. so i should be good to go correct? what do yall do about traction with a 75 shot?

 

No, but after the cat would be benefical.

 

It would be good in place of the cat.

 

That too...

 

That was my idea on where to put it. Thanks for the help, back to help with the original question about gauges. Would it be good to have A/F gauge as well?

 

from what ive read, only if your above a 75 shot. but im not sure

 

a/f only if its a wideband, not those cheap autometer a/f gauges.

 

so should i be alright with what i have? I ordered a .036" flare jet from nos since my kit didnt come with one. Ill include some pictures as well.
Zack

 

yes you will be fine with what you have, all the other stuff is extra

if you go pass a 75shot the 1st thing on your list should be a upgraded fuel pump

 

I almost bought that anyways, but then i figured i would need an safcII or something because I would run rich all the time.

 

just get a afpr

 

So I just picked up a second bottle for 50 bucks and the plan is to run a dual 75 shot (150 shot). Im going to order the second set of solenoids and another heater. Also I was going to buy a new fuel pump, EGT gauge, A/F gauge, and a fuel psi gauge with 3 steps colder plugs. Anything else im missing? any words of wisdom before i just do this? thanks guys

Zack

 

I have an egt gauge for sale. Hit me up.

 

I have an electric exhaust cutout for sale if you want it.

 

what would the egt gauge really tell you? whats the point?

 

Got pics, price?

 

Really good slicks........ Walbro255 fuel pump and AERO FPR. Race gas.

Now you can blow it up and my conscience is clear. J/K - I hope...

 

why would you run race gas? i know you do grey99

 

it will let you know if your running lean, your exhaust temps will raise with nitrous should still be in a certain range and iff during the run you get a spike in temps you'll know to get out of it

 

Why? Two engines later.... Look at some of my spark plug threads here and see what happens when you spray 150-shot and have detonation or preignition. It ain't pretty. Tuff on exhaust valves, too.

If you use cut-ground plugs (another local thread) and 103-104 octane race gas formulated to stand up to 14:1 compression and heavy nitrous, you just get-er-done out there. VP Racing Street Blaze 103 or Sunoco 104 (blue). Don't scr*w around with anything else - race gas formulations are much more than just octane. Get on their web sites and read up on fuels.

Without precautions, your engine might live. It might not. With them, it will be safer.

There's lots of guys who say they spray 100-shot or 150-shot or 200-shot, but ask for their timing slips. "Show me the slip" is the rule here.

I spray a 150-shot all the way down the strip - about 100 passes last season. That makes the combustion chambers very hot, but the only thing that showed the stress on my $500 junkyard-dog 3.0 was that sometimes I would crack a chunk out of a plug's insulator. That, and I had real traction problems with the 23/8.5/15 M&H slicks. Never did get that worked out - but don't drop the pressure below 15psi on M&Hs.

I have a decent PB of 13.158 and a bunch of 13.2s and 13.3 ETs... with slips..

So be careful and gradually raise your shot level at the track.

 

so maybe a 125 shot or 100 shot would be the safer choice? haha

 

I was just trying to make a couple of points - heavy nitrous can be very hard to manage, and you really need to start small and work your shot level up in reasonable steps. 50, 75, 100, 125, 150, 200, 250, 300 until satisfied.

If you haven't sprayed much, start low and correct whatever problems come up first, then go up a step and repeat.

 

 

And engine #4 coming up! ( #5 is in the pipeline)...

"If you ain't breakin' things, you ain't racin''"



[/rant]

 

I had an AF gauge when I had a ZEX equipped Legend. The narrow band AF gauge won't be of any use to you to help you tune. BUT, it will act like an "Idiot Light" if something causes your car to lean out while spraying. I had my FPR reference line blow off while I was spraying and my AF gauge pegged at lean, which alerted me to look at my FP gauge and I saw my FP was way low also. The AF does help, but like I said, at best it's an idiot light. It will peg to full "RICH" uner WOT, "LEAN" when decelerating, and flash all over during normal driving. Yeah, you can't tune by it, but it'll give you an idea of which mode the engine is running (decel, closed loop, open loop) or of a component failure while spraying.

 

I have gone through maybe 5 or 6 bottles on a 75 shot, I have had ZERO problems. maybe just go 100 shot? or buy a supercharger?

 

or both

i sprayed about 15 bottles of a 125 shot through my motor. 0 problems. had 160k on it too.

 

grey, you need to come to rmr in slc and race so i can watch you run a low 14 lol

 

You're a cruel man. Since I broke my last 3.0, I'd have to spray my new 3.5 instead.

It's nice to live in the lowlands,where we have air pressure. What's your altitude at rmr in slc? And what do you run there?

 

By all means, try the 100-shot next. If you have everything working right, spray the 100-shot and check plugs carefully.

 

me and steven88 got in an argument about this last year hahaha. my 328 whp sc max can't bust 14's here, but in vegas it can no problems. 2000 ft there i believe, and about 4400 here. the track sucks so bad. but to give you a comparison, sti's, evo's run low 15's here. na 350z's high 15's- low 16's. check out wotm.com those supra's are my buddy's the red lettering one) he live a couple town up from me, he can't bust 9's but vegas runs 8's all night. our track sucks but i liek to use it as an excuse as to why there never are fast et's from rmr, but utah is in the lead this year for wally's is sport compact i know that for sure! BTW I stil haven't seen any vids of your car. and did you ever do twin open c ut outs.

 

4400, eh? That's high - not as bad as Denver, but def low on air pressure. Oh well, you do what you can with what you got - at least that's what I used to tell the girls! Those NA times you mentioned are weak - and must be disappointing for the guys running their new turbo cars and showing in the 15s...


Videos - I found a couple of nighttime runs that a local club guy took with my pocket Nikon at KCIR, and I think my wife has one or two taken during the day we took our oldest grandson out to the track. I'll look - it was whuppin' a Cobra Mustang as I recall

. I always travel alone, so photos or videos are rare.

Only two I found are against a turbo orange thing (who was unhappy about losing) and against a nice 2001 5psd Maxima (no chance). Listen - you can hear my slicks squealing and the boosted automatic shifting.....

Humid night - see the purge?
http://s48.photobucket.com/albums/f2...t=Dscn1368.flv

http://s48.photobucket.com/albums/f2...t=Dscn1350.flv

I never got a chance to run headers w/cutout open on the strip - blew a piston instead.

EDIT- I just found the remaining video of my car running - this is at Heartland Park Topeka KS, against a Cobra Mustang. Wife took it...

http://s48.photobucket.com/albums/f2...AndMustang.flv