The Nitrous Forum is kinda boring. So i Finally filled up the tank yesterday after a while and ran the 55 shot until i felt like i needed more power so i upgraded to the 75 shot, and i can say there is a hell of a difference between the 55 and the 75. I couldnt believe how much of a difference i felt. The tires where losing traction and my head was getting pulled back into my seat. I am sure glad i finally did put the 75 shot in, and believe me im leaving the 55 out for a long time... Hopefully sometime get it up to a 100 shot. I sure am happier. So i just thought maybe i would enlighten this thread up a little.....

 

jez....the 75 shot is the shiznitz! I started out with that, and the only way for me is up. I hope to have a max of 125 one day, but we'll see. That might be with a 2 stage setup as well. Glad you are happy with your bump, be safe man.

 

75 shot ownz LOL I started off with a 50 shot and recently upgraded to a 75 shot I smoke my tires all the way thru 1st most of 2nd and finally in 3rd it will start to gain traction. Sounds cool hopefully one day ill have the guts to go with a higher shot.

 

nice, yea 75shot owns!!! im goign to stay 75 till i get into mid 13's. so far i ran 14.4 but with low pressure, i tested it with a bottle warmer at 1050psi, and the difference between 50 and 75shot. well thats how much i felt between 75 low pressure and 75 with warmer, its insane! already got a pump to upgrade to 100shot but not goign to just yet.

 

So, were you also using the Shift_Fast mod while out spraying the streets?

A hot bottle, sticky and short tires, Shift_Fast, 2.0 60's, daymn, you are comin' up! Been practicing those launches some more?

Remember, use 104 octane race-gas and shaved-ground plugs, and you too can spray a 125-shot and survive.... That's combining a 75-shot WITH a 50-shot, you know!

 

ok i know that this is a total newbie question, but what do you mean by shaved-ground plugs. just curious.

and as for the 75 shot, it got my heavy car into the 13's even though i had a 2.4 60'. the car had no traction untill third gear. it's fun.

 

stock fuel system?
im thinking about going to 75 too, but I would stay with stock plugs. Dont want to sacrifice off the bottle performance...

 

Ya i have my Stock Fuel Pump. But i did go 1 step colder spark plugs. I have the zex kit, and there management systems runs rich anyways. But the zex engine management is built where the fuel and Nitrous are leveled before spraying... so that you dont blow the motor. They have there kits on the Safe side of things and i do have the wet kit. Also there zex technician said all stock fuel pumps can hold up to 100 to 125 shot of nitrous on the wet kit and he said i shouldnt have a problem putting the 75 shot. As for as dry you do need to upgrade. Including 1 step colder plugs.... or even 2.

 

Nah i havent attempted to spray with the shiftfast mod, im too scared of hitting rev limiter while spraying, specially if loose traction and the rpms just jump to redline. ill be OWND! lol. actually iv been practicing my burn out lol since its been raining for couple months nonstop.

So you want to spray with stock plugs? and not sacrafice off bottle performance? I guess you rather replace your engine than loose 1 or 2 hp.

 

Hell yeah, a 75 shot is a massive leap from a 50.
Cliping the ground strap so there's less heat.
That's the first thing that get's hot enough to cause detonation so it's
better there be less of that area. That way you can probably get away with a hotter plug if
you can't find the right temp.

Cut off the section of the ground electrode that overlaps the center electrode. That's it.

 

Is this where we are supposed to make the cut (at the black line)?

 

I use pump gas on a 125 shot...


My first night I finally got it installed i went out and sprayed the 35 shot jet, and i was just laughing becasue you could feel a difference but for somereason everytime I spray i just laugh, maybe the gas is fgetting to me, that same night i went to a 50 shot, the next day a 75, with in one week a 125... I am going to spray a 160 at the track next week, I just got my DR's and I am getting my new clutch, and my guide tube for my 00VI so we'll see how I do.

I know how you feel, its awesome...

 

It should be cut stright up and down. Perellel.
You cut too much like that and it won't spark when you need it too.
Those are the same plugs I use in my bmw

 

Pump gas, huh? Well, engines aren't cheap, so after two sets of melted exhaust valves, NOW I use 104 when spraying. Also the shaved-ground NGK plugs that are two-step colder. Purging the nitrous into the cabin will make you laugh - maybe you should check ??


Incidentally, I drove on those to Maxus 06 and traveled 497 miles on one tank of Texas 93 octane, so I guess shaved-ground plugs that are two steps colder don't hurt anything. Then I went to Heartland Park in two weeks and ran a 13.31, 13.45, and a 13.5 and 13.6 ET the same evening - on the same plugs. They do erode quickly at high shots, so I need to change them.

You GOTTA tell us how it goes with the 160 shot - but PLEASE at least run 104 octane at the track - it's cheap insurance.

When you shave the grounds, ( copper-center plugs only!) bend the ground electrode so it points straight up, then cut it off so it's a little taller than the center electrode. Then bend the ground over at the bottom, next to the plug threads, and set the gap at the side of the center electrde. I use .032 - works fine for everything.

I've gotta post pictures of my plug collection - it's amazing what preignition and detonation can do to a plug. I've destroyed every type of plug - until I settled on shaved-grounds.

 

Hey dude, i just finished with the shiftfast mod, and took it for a drive, its awsome man. i floored it, n touched the rev limiter then shfited instantly, shriped tires. it just felt great. shifts are very nice.
At whar RPM are u goign to be shifting at? (according to the stock rpm tach) i noticed it went into 7k rpm wen it hit the limiter, so i assume that was about 6550 or something, i guess i should shift between 7k and 6500 on the stock tach.

 

Have you sprayed when using the Shift_Fast yet??? Suck it up and spray through the 2-3 shift..... Shift about 6400 to be safe.

I've been playing with my manual version with the short M&H slicks installed, and first gear gets there fast - probably too fast when spraying a big shot. There's more time for the 2nd-3rd shift, but that one is hard and fast too.

I've been flipping the switch just before 6500 (limiter is 6550), not spraying, and sometimes touch the limiter. The 2nd-3rd shift is done as the tach touches 6500. Seems to be OK, except for all the tire spin...

I might get brave and spray the 50-shot through the 1st-2nd shift, probably shifting early, then getting into the 125-shot combo and spraying through the 2nd-3rd shift by flipping the switch about 6400. Not much room for mistakes.

You gotta remember that.
A. There's no guarantee how accurate my or your tach is.
B.The faster your engine revs up, the more behind the real RPM the tach shows.

The MSD-switch version is the only way to get reliable shifts, and that set-point will have to be found for every different shot you spray. There appears to be a slight delay on shifts with the Shift_Fast mod, so the higher the shot, the lower the MSD must be set. But once you get it right, hang on!

I picked up the rest of the parts I need tonight, so construction is next. One 8969 MSD switch, three DPDT relays, two 4700mfd capacitors, two 1000 ohm resistors, four diodes, one SPST NC reset switch, one double-gang plastic electricial box and blank cover. Attach in place of manual switch. Shift_Fast !!!

 

100 octane will do, engines are cheap, just not fun to put in. I laugh out of enjoyment, no purge for me. I got my drags on tonight and ran into a white maxima spraying a 150 shot. Me and my buddy (jcy98maxse) ran him, both of us pulled on him, i think he had to have a lot more weight but his car was scraping on everypump as if he had no springs at all, it was ghetto.

Personally i dn't think shaved plugs help, detonation occurs with in the cylinder head itself when the heat gets the carbon build up on the sidewalls hot enough to combust, shaving the plug doens't provide any colder of a spark but helps keep the temp down i guess, i run the BKR7's like the above pic and they are gapped to .35, im at 4300 ft elevation, with 91 octane, no detonation at all, and there are a few maxes that run/ran 200 shot... I also have the 190lph fuel pump and FPR and bumped up my fuel pressure to run a little more rich... anything over 125 i will use race gas to be on the safe side though not to mention my 160K motor is getting tired...

 

Well you might be right about the detonating that it is not caused by the plug, but how come the plugs ground is the first thing that gets melted or damaged due to detonating, thats why i think shaving the ground a lil sorta helps a bit, maybe not by alot but anything lil thing adds up. high oct gas, 2steps cold, shaved, etc... decreses chance of detonation. im lagging i got a 190 pump already from sonic dust bout a month ago and havent installed it yet, im still at 75shot.

 

I was just worried about fuel. I'll probably keep the plugs stock and just get my car tuned because my afr is in the low 10s.. I have a wet kit from NX,
thanks for the reply, I appreciate it.

 

Good thinking - it's not about what you think will work and won't scr*w you up - it's about what you can do to keep bad things from happening to you. Sorta like a " nitrous condom" for your car. Ground straps that suddenly glow in the dark can scr*w you up. Cut 'em off. Gap 'em close. It's your engine...

That pump is easy to install - take out your rear seat, take off the three screws holding the tank cover on, lift out the pump assembly and look at it closely - then take out the OEM pump and clip in the Walbro. At least take it apart and look at it - if you don't feel confident, take pictures and put everything back together, post your pix and ask questions. You really should get a 300ZX fuel filter - they're $12.00 or so at Advance Auto Parts, and they flow 3X the fuel of an OEM. Cheap insurance against leaning out. See above.

I Shift_Fast !

 

My opinion:

Shaved plugs help. Higher octane helps. Helps = save your engine when something goes wrong. Nothing to do with carbon - I don't have any left. Spark isn't hot or cold - you either have spark or you don't. The heat range of a plug refers to how fast heat can be sucked away from the center electrode to the outer shell of the plug. When you spray, the combustion chamber gets hotter - when the ground strap of the plug heats up and begins to glow, you WILL have preignition and/or detonation. This is a BAD THING. Preventing this is a GOOD THING.

Moving on, I'm impressed with Utah's Maximas - and spraying 150-shot and 200-shot Maxes on the street is nuts. I'd sure like to see that.... Do your Maxes make the local strips? Maybe Utah has the same enhanced air that Canada has..... which is 20% nitrous, I'm sure.


Any ETS to report with your heavy shots, or is it mostly a street scene?? Any of your buds report any ETs ??? Just curious - I run about 900-1100 ft altitude, so low 13s is my baseline now.

 

I guiess the only way to tell if shaved plugs really do help or not is too see how many people have blown there motor with them shaved vs with out, but that still could be a useless poll considering i am sure there are more that dont, eith way all of us up here have not and none of us have detonated.

We are at 4300 ft, we have a few ET's a lot of us that ran didn't have traction so low 14's was our best. We also have some video's I will find some post oabout my track experiences and a vid of my buddies turbomax vs my firedns 100 shot max, that will also be the same kid that sprayed a 200 shot one time.

 

That would just be a useless poll all together since shaved plugs arn't the only reason one blows a motor, diffrent components, plain stupidness, ect..

It's a known fact and commen sense to anyone who's melted a plug that
shaveing that part down will create added saftey.
Whether you, or anyone believes it or not, it's a FACT and a good trick to use.

 

Ive never melted a plug. For those that dont have access to a wideband AFR setup or EGT gauge this is cheap insurance. I have a wide and the J&S Safeguard too, so no lean heat or detonation here. Most race plugs are this type.

 

I believe that it does help prevent anything, but probably does little to nothing IN MY OPINION, and I don't believe that just becasue thats the part that melts is what helped cause the problem... Im sure every little bit helps, im just stuck on a "colder" plug and a closer gap, that in and of itself makes N/A driving noticably different and more sluggish. that and runnin rich.

 

same here never melted a plug even when i blew my motor. ever since my J&A install i really dont worry about detonation anymore.