Nitrous Question

351stng · April 11th, 2007, 09:51 AM

i'm only going to run a 100-150 shot, but i'm going to start with a fifty shot just to get the engine used to it.i have a question what is the stock timing set at and how much should i retard the timing

Darrell · April 11th, 2007, 02:06 PM

The engine doesn't get used to it. Starting with a smaller amount won't make anything last longer. In all honesty, 150hp is a small amount of nitrous. Stock initial timing is 10 degrees btdc. Most people run 14-16 degrees btdc. With 100hp of nitrous you don't need to retard any timing. Just run 92 or higher octane fuel. With 150hp I'd pull 2 degrees out.

homebrewed · April 11th, 2007, 02:12 PM

Will the factory fuel system be able to handle that much? Also, what about the spark plugs? Should he drop 1or2 steps colder?

These are questions I think need to be answered... For me and 351...

5.slo · April 11th, 2007, 03:21 PM

Originally Posted by homebrewed

Will the factory fuel system be able to handle that much? Also, what about the spark plugs? Should he drop 1or2 steps colder?

These are questions I think need to be answered... For me and 351...

I run a dry 75 shot on my fox w/ the stock fuel pump. It is fine with 75 but when I go to the 100 shot you can feel the car fall on its face around 5k cause its running out if fuel, before that its an animal but not safe. Definitly upgrade the fuel pump, I plan on doing mine soon.

Darrell · April 11th, 2007, 04:16 PM

Originally Posted by homebrewed

Will the factory fuel system be able to handle that much? Also, what about the spark plugs? Should he drop 1or2 steps colder?

These are questions I think need to be answered... For me and 351...

The stock fuel system might handle it but I'd put a 255lph pump in to be safe. The NOS 05115-ii kit comes with an inline pump too. With 150hp and less you don't need a colder heat range with stock compression.

351stng · April 11th, 2007, 05:36 PM

well i'm running a wet kit and my timing is get at 16 deg advanced if i run a 150 shot do i go back to 10 deg or do i go less

Darrell · April 11th, 2007, 08:56 PM

Originally Posted by 351stng

well i'm running a wet kit and my timing is get at 16 deg advanced if i run a 150 shot do i go back to 10 deg or do i go less

Wet kit or not doesn't matter, I would upgrade the fuel system. Like I said in my previous post pull 2 degrees out with 150hp which would put your initial timing at 14 degrees instead of 16 degrees.

351stng · April 11th, 2007, 09:45 PM

I HAVE A 255 IN THE TANK I CAN HEAR THAT DAMN THING INSIDE THE CAR

BUT AS ALWAYS THANKS FOR YOUR INFO IT HELPS ME OUT ALOT THANKS MAN

whiteboycustom · April 12th, 2007, 09:00 AM

what about a carburated car, i have a holly mech pump that does 80gph, what would i need to do for nos

JBIGBOOTSY · April 12th, 2007, 10:06 AM

Originally Posted by whiteboycustom

what about a carburated car, i have a holly mech pump that does 80gph, what would i need to do for nos

Do a volume check, unbolt the a/n fitting from the fuel side of your plate. install the fuel jet, put the fuel line with a jet into a container. start the car, Avtivate the fuel side only!!! solenoid, while it is on check the fuel pressure for dropoff.

whiteboycustom · April 12th, 2007, 11:21 AM

i have a 650 demon on it and i have a gauge and its in the 6-9lbs area,the carb needs more fine tuning before i add it though

April 11th, 2007, 09:51 AM	#1
351stng Newbie Join Date: Jan 2007 Posts: 19	Nitrous Question i'm only going to run a 100-150 shot, but i'm going to start with a fifty shot just to get the engine used to it.i have a question what is the stock timing set at and how much should i retard the timing

April 11th, 2007, 02:06 PM	#2
Darrell MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 6,574	The engine doesn't get used to it. Starting with a smaller amount won't make anything last longer. In all honesty, 150hp is a small amount of nitrous. Stock initial timing is 10 degrees btdc. Most people run 14-16 degrees btdc. With 100hp of nitrous you don't need to retard any timing. Just run 92 or higher octane fuel. With 150hp I'd pull 2 degrees out. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

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April 11th, 2007, 05:36 PM	#6
351stng Newbie Join Date: Jan 2007 Posts: 19	well i'm running a wet kit and my timing is get at 16 deg advanced if i run a 150 shot do i go back to 10 deg or do i go less

April 11th, 2007, 09:45 PM	#8
351stng Newbie Join Date: Jan 2007 Posts: 19	I HAVE A 255 IN THE TANK I CAN HEAR THAT DAMN THING INSIDE THE CAR BUT AS ALWAYS THANKS FOR YOUR INFO IT HELPS ME OUT ALOT THANKS MAN

April 12th, 2007, 09:00 AM	#9
whiteboycustom Regular 83 coupe Join Date: Feb 2007 Location: vidor,texas Posts: 317	what about a carburated car, i have a holly mech pump that does 80gph, what would i need to do for nos

April 12th, 2007, 11:21 AM	#11
whiteboycustom Regular 83 coupe Join Date: Feb 2007 Location: vidor,texas Posts: 317	i have a 650 demon on it and i have a gauge and its in the 6-9lbs area,the carb needs more fine tuning before i add it though

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