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If anybody can educate me on NOS or point me where the find out how the use it..
I never used it but the new car I bought has it hooked up and I want to try it.

The car is 65 Coronet 383, steel ported heads. Don't know the compression ratio, 727 w/ 10" converter, 4.10 posi. 29x9 hoosiers. The bottle is in the trunk and I took it out and weighted it. It weighs 20lbs. and there is gas in it. The dash gages also has a fuel pressure gage. the shifter has a nos button it, but I have not pressurized the system or tried it yet. I don't know how old the plugs are, The pis of the plug is after 6 runs I did on gas. The car ran 13.17 @ 103 last week in 90 degree heat.
I don't know what jets are in the holley. The plugs look very clean almost lean?
When should I hit the button? and do I hold it for the full run?
Let me know what I should do and any advise is much needed.
I would like to run the car tomorrow and maybe try the nos, if I can make it work.
Any help or advise is much appreciated!
Thanks!
Don

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1st. thing, like mentioned, you need to see what jets are in there, Plus take the extra plate off unless the spray bare are already out & its just open. See if it even has jets, it could be a fixed plate like a powershot 125.

I would advize installing a throttle switch for WOT activation, much safer this way, one of the worse things you can do is activate the N2o with too low RPM or low throttle opening from a button.

Never run the N2o during a burnout

Install a fresh set of plugs & tighten up the gap to .033"/.035"

Start off with a 125 shot, Don't remember the F/N jet sizes off hand.

Make "damn" sure the fuel supply is up for it, you can T off with a 125, but 150 & above i'd look into a dedicated fuel supply for the N2o.

If the plate hasen't been used in awhile, i'd pull it off & run carb cleaner through it to make sure the spray bars aren't stopped up.

Make sure the ignition & curve are good with no erratic behavier. I like running a good ignition system with an adj. dist. for the timing curve, thats just me though.

The thing with N2o is this, You want to get the car to run at its best, then run the N2o, Thats where you really benifit from the best gains, Basically meaning, don't have the engine running so-so & use the N2o to benifit the power.

It never hurts running alittle race gas mix 25% 110/ 75% Premium, But if the compression is low enough & you don't exceed 125, you should be good on pump premium, Your trying not to cause any detination, thats the key, You can get away with less octane, but you'll need to pull more timing & possibly run a colder plug & keep the Fuel jet higher, But the gains will be more if you have higher octane, then you can run quicker from more tune.

I hope some of this info helps, I love Nitrous, but i was a bit sceptable in the beginning, now i've learned what the does/don'ts are when running it, But as anything especially N2o, Its a 50/50 chance you take, don't let that scare you, you can lower that percentage by playing it safe & pay attention to your tune, plus read the plugs, I like NGKs, they are easy too read, plus "don't get greedy".

Definitly get a bottle pressure gauge, then theres no guessing were the bottle pressure is at.

For a 125 shot, pull 4* timing from your best NA tune.

Here are a few of the parts i mentioned.

http://www.jegs.com/i/JEGS-Performance-Products/555/41005/10002/-1
http://www.jegs.com/i/JEGS-Performance-Products/555/16500/10002/-1
http://www.jegs.com/i/NOS/741/13721/10002/-1 Jet kit for 100/125/150

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Thanks SSDACUDA. I found the fuel line and jet. The fuel jet is a 81 and the NOS jet is a 73. The Holley carb lets are 73s.
The fuel system is a holley blue pump and holley regulator for the main fuel line. A second line directly from the pump goes stright to the fuel rail where the fuel NOS selonoid is connected, all braided lines.
What else do I need to know or do?
Thanks all for the help so far...
Don

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Cmon Don,
I'm sure the previous owner had it dialed in..just push the button..just a little, maybe just a little in low. PUSH IT!! Cmon Don, DON! Just give it the juice!!
This ain't rocket science, well uh, not really, just blip it...see how that feels, calming at first, feel the power, now MORE!! C'mon...it's not addictive, I swear...just try it already!!

I'm bidding on 5 used bottles on EBAY...at the same time!! I've sprayed 2 stages the full length of the track, and I need more...but I'm sure you can control it really...

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Yea....Tell him that frst BLAST is a MUTHA

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O.K another question after looking further into what I have.

So I figured out the fuel system and want to know if this is correct.
1, Main line from fuel cell, through Aeromotive pump to Holley regulator, to Holley fuel rail.
Nos fuel pickup point is at the end of fuel rail, to the solenoid, to the carb.
On the fuel rail is ALSO a fitting that a return line goes from the rail back to the fuel cell.

Should there be a return line? How can the pump build pressure with a open return line going back to the cell?

With what I have now. Holly Pro series 850 w/ 73 jets, Nos has #78 nos jet and #81 fuel jet, should I stay with that or start out smaller and if so what do you recommend for jet set up?


Thanks for the all info and help so far, I now understand how the system works and what to look for.

I did order a nos pressure gauge and WOT switch.

The system is a Compucar setup.
Their website and installation directions are very minimal though.

Thanks again!
Don

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