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Go Back   3800Pro.com Forum > Power Adders > Nitrous Oxide (N2O)

Nitrous Oxide (N2O) Discussions regarding nitrous oxide injection.

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Old 01-31-2005, 08:02 PM
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Question NOS Question

HI guy's,
I'm new to the site, so please forgive me if I step on any toes!
I reciently bought a 2001 GTP(48K)
In the trunk I found an Extra pully. After doing some research. I found out that it's a 3.4" pully for the super charger .
What I would like to know is if I can put a mild NOS kit (50HP) along with this pully and not damage anything.
any requests, Thoughts & opnions would be greately appreciated.
Regards
Ed
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Old 01-31-2005, 08:37 PM
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you will need more mods to be able to run those two effectively.
such as
1) intake
2)exhuast - Ubend removal - downpipe - hi flow cat
3)lower tstat
4)PCM

not ALL of the above are necesary, i'd start with an intake and Ubend removal and go from there.
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Old 01-31-2005, 08:49 PM
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Hi Smooth,
Thanks for the info.
I'm going to ask that you forgive my ignorance in advance.
I fully understand The exhaust & Tstat parts...... But, generally, what are your recomendations for the intake & PCM.
I really don't want to take up much of your time. If there are some web sites that you can recomend that will help me understand these things better. I'll be glad to go to them.
Thanks again for your help & paitence
Ed
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Old 02-01-2005, 09:46 PM
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you should be fine with just the 3.4 pulley and n20 it would help to run more n2o by retarding the timing some but stock timing is fine with a 75 shot and below anything more you may want to retard the timing. I would recommend going 2 ranges colder on the spark plugs running the n2o.
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Old 02-04-2005, 11:59 PM
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With the nitrous system hooked up correctly, one step colder on the plugs, and regap them smaller. .060 is stock, and I know NOS Nitrous recomends that you gap them at .035 and I have heard people going up as much as .045 with no misfires.

You want to change from the factory air intake, a cone style filter works well. K&N

Exhaust - get rid of the U-Bend, the stock down pipe will be fine if you keep the shot small. (under a 75 shot)

When you install you jet in the intake...make sure its AFTER the throttle body sensors. I dont know how many systems I have seen with it spraying before the throttle body.

Get you a throttle body spacker plate, I like the phonolic one PFYC.com sells. Drill a hole on either the front or the back, and screw in your nozzle.

Its a toss up on people when we talk about spraying before the blower, and some belive that a wet is better than a dry, and some say a dry is better than a wet, some say it hurts the blower rotors, and sone say it doesnt...

I know I am making a spacer plate that goes UNDER the supercharger to directly spray a equal shot into all cylinders. The blower tends to load up #3 cylinder with more nitrous than any of the others. FYI. Thats just the cylinder thats indirect flow of the out let air direction that the blower is pushing.

~Farnsworth~
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Old 02-05-2005, 10:06 AM
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Thanks Guy's ....for all your input.
I do, however have 2 more questions.
I have heard of alot of people ruining there SC's with N2O..... I guess it Delaminates the rotors.I don't know if this is true or not but, I must keep in mind that this is going to be an everyday driver for my wife. I thought it would be better to go with a direct injection system?? (dependability). Also, Understanding that I'm going with a pretty small shot, I'm wondering if I should do anything to protect the transmission?
I was thinking of putting a trans cooler on it. But more importantly I was wondering If there is a better quality transmission fluid that would help protect the internals? I've heard of Royal Purple fluid being a pertty good product. Any thoughts?
Thanks in advance for your help guy's.
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Old 02-06-2005, 11:37 PM
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Dont know about the trans fluid I use reg Dextron, as far as the cooler I have one on mine not really sure if needed but my car was origanlly a 5 sp car converted to an auto. I have ran 100 shot on mine (normally only run 75 shot, next trip ot track we will try the 125)with 93 octane on a bone stock series 1 sc with no problems, I run NGK TR6 spark plugs gapped @ .060 never had a misfire or anyother issue for that matter. as far as the " U bend " no idea on that aswell mine does not have it not sure what it is never paid any attention to the 3800sc in the car they come from.
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Old 02-07-2005, 03:20 PM
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Gapped at .060 and no misfires? DAMN! NEVER seen one of our cars gapped that high and hasnt had to reduce gap because of misfires.

When you say no misfires...you mean no SES codes, and NOT "FEELING" any misfires/engine surges at WOT? I would like to know how you are able to run such a large shot, with such a large gap. Give me some info.

-Eddie-

To answer your other qustions:
N2O sprayed into and through the blower...wearing out the rotors...well thats iffy. I have a dry shot, and its in a throttle body spacer plate, and I'm spraying into the blower. Small shot, 50HP shot, and only use it when the out side temps are hot, and use it too cool the inake and oulet supercharger temps. I dont rely on my nitrous for horse power. Just use it to change intake temps. I have removed my snout to inspect my rotors, no wear on them other than whats normal.

A wet set up, spraying in the same place, into the blower, I have heard both sides. YES it doesn strip off the roto coating, and NO it doesnt have any effect on the rotor coating. I have seen a set of stripped rotors...but that (I was told) was because of a leaky throttle body, letting coolant into the supercharger. (to my best of knowledge).

Spraying into the blower does work, but after learning where the out let of the supercharger ends up...I quit doing it. The out let of the M90 will push more air to the left side of the out let more than the right, or stright down (as thought to be). So, that loads up the left head more than the right head, and it loads up cylinder #3 more than any of them. (#3 is the middle cylinder on the left side of the engine/ the middle cylinder on the front side of the engine when you pop your hood. (because our engiens sit side ways you know).

Thats whay I'm making a spacer plate, so each cylinder gets an even shot. And that will be cheeper than making a direct port injection system, with all the plumbing work involved. (the nitrous and fuel are sprayed into the engine under the fuel injector on a direct port set up.) My spacer plate will be injected right infront of each fuel injector, directed to go into each head port.

Transmission - just use Dextron/Mercon III stuff, any brand, and check the level before every track visit, and change it oftin. (more oftin than intended by GM) I usually change mine once a year if I go to the track maybe once to twice a month during the summer. I do have a cooler, and not sure its really needed but it does keep the temps down, and allows my tranny to get to operating temps. (Not GM's specks) Its a B&M Supercooler, Summit Part number BMM-70264, $49.88 tossed their hoses to the side and used some stainless steel braded hoses as an upgrade. No leaks, and no high temps.

A tranny cooler is a 50/50 yes or no. Some say yes, use one, and some say no dont use one. They way GM specked the transmissions on our cars, their operating temp. is rather high in my opinion. It uses the radiator to get the transmission fluid to a hight temp a.s.a.p. and then keeps it at that them the best it can by allowing the engine coolant temp to take the heat off the transmission fluid. There is no real seperate cooler...just the one built into the radiator. I wanted an seperate system for my INTENSE transmission, you know whenthey did buid them. I havent had a problem yet, and its been working fine and shifting on demand ever since I installed it about 2 years ago.

~Farnsworth~
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Old 02-07-2005, 07:14 PM
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ok I have not recorded a run while scanning so I might been wrong in statement on no misfires, i am making a trip to the track in a couple weeks and I will try to closing the gap alittle. I have ran mine with 100 but I am going with 125 and 100 octane next trip. been running NGK TR6's no noticable problems pull plugs after run all seem to be fine.
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