what happen with my NOS?

5000cc · 07-07-2001, 11:56 AM

Guys,last night i went to the track to tried out my new NOS 75 dry shot.Before i put NOS i ran the best time of 14.45 with edelbrock intake,72 proM,24 lbs injectors,fully exhaust,aluminum drive shaft,traction bar,pullies and stock 16 inch pony rims with not-so-much-of-treads-left tires bad clutch and bad synchro.Last night i ran 14.46 with the juich off the line with cobra upgrade tranny and new king cobra clutch,new 15 inch weld rims.traction was a problem but not as bad.I tried both idle off the line and play with rpm off the line the result still the same.After 3 runs i experience detonation on 3rd and 4th gear.I have stock plugs with 0.054 gap,retard timing to 8 degree,stock fuel pump and fuel pressure is 47 psi with vac.line off. What the hell is happen here!I thought i would be running low 13 or even high 12. What have i done so wrong? 93 coupe.

JamGtStang · 07-07-2001, 01:42 PM

Oye balsero!!! what intake r u running? where did u go? morosso? thats weird u should be running with that combo low 13's i think u should check ur NOS connection r u sure u opened up the bottle?

JM

I live in kendall by the way

93CobraR · 07-07-2001, 05:37 PM

Did you launch on the nitrous with street tires? If you did that probably just spun the **** out of your tires, and thats what caused your bad ETs. The important part that we need to know is what was your MPH before and after?

------------------
87 GT, Cobra R's,GT-40 heads,Crane 2031,1.7's, Edelbrock intake, long tubes,BBK cold air, Mass air,pulleys,Pro 5.0, King Cobra,Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 12.759
Best MPH 106.79
Best 60' 1.695

Visit my site at:
http://www.geocities.com/cobrar93_2000/MyPage.html

fordmanck · 07-07-2001, 06:23 PM

Try going to a step colder plug and gap them at .035. I run autolite 24's.

What fuel pump are you running?

------------------
My 94 GT

[This message has been edited by fordmanck (edited 07-07-2001).]

5000cc · 07-07-2001, 06:59 PM

I didn"t spin that much off the line because i know that i have the juice waiting for me,and yes i have check the bottle they were open all the way (refill overnight before)one thing though i bypass pcv vac.line from intake to air box due to excessive oil inside intake.would that cause the problem also?

fordmanck · 07-07-2001, 10:09 PM

Did you even read anything I typed?

Rick 91GT · 07-08-2001, 11:45 AM

Quote:

Originally posted by fordmanck:
Try going to a step colder plug and gap them at .035. I run autolite 24's.

What fuel pump are you running?

I agree the colder plugs and smaller gap will help, but I also want to know why you are running 47psi of fuel pressure

You can try hooking the PCV hose to the intake tube that should solve the oil issue, if you have the hose in the air box the oil is going through you Mass Air meter which is very bad.

------------------
Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon! FIRST TIME OUT 12.16@111 WHEELS-UP

fordmanck · 07-08-2001, 05:06 PM

I run alot of FP too Rick. I guess I go by the better safe than sorry. My car does load up alot when I run the A/C and it's hot out, but only if I start it within 10 mins of shutting it off. I run about 48 with vaccum off. I just changed my plugs today after 20k miles and about 10 bottles and they looked perfect.

5000cc, you need to be running at least a 190lph fuel pump. I will guarantee that you will not see detonation if you upgrade your fuel pump and get the colder plugs gapped smaller. I have NEVER detonated at all and I'm running a 150 shot.

------------------
My 94 GT

5000cc · 07-08-2001, 05:18 PM

Hey,fordmanck i did read your replied and thank you for taking your time answer it. I am using stock pump which of course according to instruction that should be sufficient!!well,today i went to buy new spark plugs ( autolite #24 )and i check the whole system out and they are working like it suppose to,and to answer rick91GT i am using that high as per aeromotive instruction ( i followed every *** damn thing in the book )

Moxie · 07-10-2001, 07:52 PM

I don't care what NOS says about the stock fuel pump, I would upgrade that first. It can make 47psi at idle, but on a dry kit, the extra fuel is supplied by spiking the fuel presure up to around 80psi at the regulator. That pump is probably falling on it's face under load, and not supplying enough fuel. You run lean and detonate.

While you're at it, install a new fuel filter.

------------------
Moxie Racing

The Nitrous Oxide Information Site

5000cc · 07-10-2001, 10:10 PM

Moxie,you probably right but i only used 75 shot and when NOS kicked in it read 70 psi and that's plenty of psi for 75 shots isn't it?NOS said it should be at least 38 psi for 75 shots and 80 psi for 150 shots.

fordmanck · 07-11-2001, 10:16 AM

Just take our word for it. You should really upgrade your fuel pump. I don't want to see you come on here and tell me you blew a head gasket and bent some valves because you didn't put a $200 fuel pump in. Believe me, it'll cost a whole helluvalot more if you break something. Just some food for thought.

------------------
My 94 GT

tireburner163 · 07-11-2001, 10:59 AM

I agree with Fordmanck, up grade the fuel pump

------------------
1990 Dodge Dynasty with 275,000 miles. Mods:chiped paint, CD player. Sucks but it was free. Praying for a stang.
The "Guetto Glider"

If it ain't broke, you ain't tryin hard enough

86GT · 07-11-2001, 11:13 AM

Get a fuel pump! Go with a 255lph that way you can upgrade your jetting safely later too. I'm running the dry kit with a 190lph on a 125 shot now.

5000cc · 07-11-2001, 05:16 PM

All right guys,i'll buy a fuel pump but to up the horse power to 100,125 & 150 hp ,what size of nozzle jet do i use?

ed1371 · 07-11-2001, 05:36 PM

wrong thread, sorry...

[This message has been edited by ed1371 (edited 07-11-2001).]

07-07-2001, 11:56 AM	#1
5000cc Registered Member Join Date: May 1999 Location: Hialeah,Fl,USA Posts: 57	what happen with my NOS? Guys,last night i went to the track to tried out my new NOS 75 dry shot.Before i put NOS i ran the best time of 14.45 with edelbrock intake,72 proM,24 lbs injectors,fully exhaust,aluminum drive shaft,traction bar,pullies and stock 16 inch pony rims with not-so-much-of-treads-left tires bad clutch and bad synchro.Last night i ran 14.46 with the juich off the line with cobra upgrade tranny and new king cobra clutch,new 15 inch weld rims.traction was a problem but not as bad.I tried both idle off the line and play with rpm off the line the result still the same.After 3 runs i experience detonation on 3rd and 4th gear.I have stock plugs with 0.054 gap,retard timing to 8 degree,stock fuel pump and fuel pressure is 47 psi with vac.line off. What the hell is happen here!I thought i would be running low 13 or even high 12. What have i done so wrong? 93 coupe.

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07-07-2001, 01:42 PM	#2
JamGtStang Registered Member Join Date: Dec 2000 Location: Miami, Fl Posts: 58	Oye balsero!!! what intake r u running? where did u go? morosso? thats weird u should be running with that combo low 13's i think u should check ur NOS connection r u sure u opened up the bottle? JM I live in kendall by the way

07-07-2001, 05:37 PM	#3
93CobraR Registered Member Join Date: Oct 1999 Location: Cincinnati, Ohio Posts: 1,575	Did you launch on the nitrous with street tires? If you did that probably just spun the **** out of your tires, and thats what caused your bad ETs. The important part that we need to know is what was your MPH before and after? ------------------ 87 GT, Cobra R's,GT-40 heads,Crane 2031,1.7's, Edelbrock intake, long tubes,BBK cold air, Mass air,pulleys,Pro 5.0, King Cobra,Lakewood Lift Bars,50/50's,subframes, 4.10's. Best time 12.759 Best MPH 106.79 Best 60' 1.695 Visit my site at: http://www.geocities.com/cobrar93_2000/MyPage.html

07-07-2001, 06:23 PM	#4
fordmanck Registered Member Join Date: May 2000 Location: Seminole, FL Posts: 193	Try going to a step colder plug and gap them at .035. I run autolite 24's. What fuel pump are you running? ------------------ My 94 GT [This message has been edited by fordmanck (edited 07-07-2001).]

07-07-2001, 06:59 PM	#5
5000cc Registered Member Join Date: May 1999 Location: Hialeah,Fl,USA Posts: 57	I didn"t spin that much off the line because i know that i have the juice waiting for me,and yes i have check the bottle they were open all the way (refill overnight before)one thing though i bypass pcv vac.line from intake to air box due to excessive oil inside intake.would that cause the problem also?

07-07-2001, 10:09 PM	#6
fordmanck Registered Member Join Date: May 2000 Location: Seminole, FL Posts: 193	Did you even read anything I typed?

07-08-2001, 05:06 PM	#8
fordmanck Registered Member Join Date: May 2000 Location: Seminole, FL Posts: 193	I run alot of FP too Rick. I guess I go by the better safe than sorry. My car does load up alot when I run the A/C and it's hot out, but only if I start it within 10 mins of shutting it off. I run about 48 with vaccum off. I just changed my plugs today after 20k miles and about 10 bottles and they looked perfect. 5000cc, you need to be running at least a 190lph fuel pump. I will guarantee that you will not see detonation if you upgrade your fuel pump and get the colder plugs gapped smaller. I have NEVER detonated at all and I'm running a 150 shot. ------------------ My 94 GT

07-08-2001, 05:18 PM	#9
5000cc Registered Member Join Date: May 1999 Location: Hialeah,Fl,USA Posts: 57	Hey,fordmanck i did read your replied and thank you for taking your time answer it. I am using stock pump which of course according to instruction that should be sufficient!!well,today i went to buy new spark plugs ( autolite #24 )and i check the whole system out and they are working like it suppose to,and to answer rick91GT i am using that high as per aeromotive instruction ( i followed every *** damn thing in the book )

07-10-2001, 07:52 PM	#10
Moxie Registered Member Join Date: Aug 2000 Location: Plymouth, MI Posts: 254	I don't care what NOS says about the stock fuel pump, I would upgrade that first. It can make 47psi at idle, but on a dry kit, the extra fuel is supplied by spiking the fuel presure up to around 80psi at the regulator. That pump is probably falling on it's face under load, and not supplying enough fuel. You run lean and detonate. While you're at it, install a new fuel filter. ------------------ Moxie Racing The Nitrous Oxide Information Site

07-10-2001, 10:10 PM	#11
5000cc Registered Member Join Date: May 1999 Location: Hialeah,Fl,USA Posts: 57	Moxie,you probably right but i only used 75 shot and when NOS kicked in it read 70 psi and that's plenty of psi for 75 shots isn't it?NOS said it should be at least 38 psi for 75 shots and 80 psi for 150 shots.

07-11-2001, 10:16 AM	#12
fordmanck Registered Member Join Date: May 2000 Location: Seminole, FL Posts: 193	Just take our word for it. You should really upgrade your fuel pump. I don't want to see you come on here and tell me you blew a head gasket and bent some valves because you didn't put a $200 fuel pump in. Believe me, it'll cost a whole helluvalot more if you break something. Just some food for thought. ------------------ My 94 GT

07-11-2001, 10:59 AM	#13
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	I agree with Fordmanck, up grade the fuel pump ------------------ 1990 Dodge Dynasty with 275,000 miles. Mods:chiped paint, CD player. Sucks but it was free. Praying for a stang. The "Guetto Glider" If it ain't broke, you ain't tryin hard enough

07-11-2001, 11:13 AM	#14
86GT Sniffed too much n20 Join Date: Oct 1998 Location: Ont, Canada Posts: 1,018	Get a fuel pump! Go with a 255lph that way you can upgrade your jetting safely later too. I'm running the dry kit with a 190lph on a 125 shot now.

07-11-2001, 05:16 PM	#15
5000cc Registered Member Join Date: May 1999 Location: Hialeah,Fl,USA Posts: 57	All right guys,i'll buy a fuel pump but to up the horse power to 100,125 & 150 hp ,what size of nozzle jet do i use?

07-11-2001, 05:36 PM	#16
ed1371 Registered Member Join Date: Feb 2000 Posts: 469	wrong thread, sorry... [This message has been edited by ed1371 (edited 07-11-2001).]