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Old 01-27-2004, 02:21 PM
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weird NOS question

I've never sprayed a motor i've driven, or been a pasenger in a car w/ NOS. But I do know what it is and how it works, thats why i have this question on my brain...

I know that if you spray a race motor, chances are you are going to change/play with the timing as to not blow the motor.

But what about those kits you see in the magazine, like a 50-100 shot, that comes w/ the bottle, solonoids, and lines. But it doesn't come w/ a computer to change the timing (on newer vehicles, say, a '99 mazda miata)

So what are these people doing to their engines when they add a NOS kit but don't change timing on the motor?

Or do these kits have something to change it?

Let me know what you think/know

Sean S.


Last edited by onecoomofo; 01-27-2004 at 02:27 PM.
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Old 01-27-2004, 03:00 PM
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As with most things with hot rods, it will vary and depend on the situation.

For 100Shot you don't have to retard the timing (if so not much). Most bottle fed cars are set up to run on the bottle, meaning the timing is already set for it.

There are timing controllers you can add to any vehicle, no computer needed. MSD and Crane are two that come to mind, they are just a knob on the dash and you can "dial" back the timing from the drivers seat.

There are other devices as well that can be activated by a full throttle switch. Too many options to list. For smaller shots you don't have to always adjust the timing (this depends on the type of pistons, compression ratio, type of fuel, etc..)

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