John,
Hmmm! Don't know if I should help you on this??? You thrash me pretty
good without nitrous, but then I have no secrets.
We run a Kinsler prepared Crower 2.5 inch injector with the nitrous
plumbed on the underside of the manifold. We use a NOS 200 HP system,
single stage system that is jetted with fixed nozzles (one fuel and one
nitrous) in each intake port. We use a holley fuel pump with an
adjustable regulator for the added alcohol when nitrous is applied. This
past year we went to a digital MSD that retards (adjustable) when the
nitrous is applied. We generally use the nitrous for the last 1 1/2
miles at Bonneville and in high gear at the lakes.
We have two 10 pound bottles on board. I found early on that for best
performance you need a fresh bottle on each run. However, our fastest
run at the World Finals was a second pass on the same bottle. We use
about 3 lbs. per run.
When I was running geared for 8000 to 8200 RPM, the application was very
thrilling, like hitting passing gear, but with the present gearing
(7600) it is fairly soft, but still exciting. It can get loose when the
nitrous is turned on. Nitrous was the trigger for Jeff's spins.
A word of caution, I carried a nitrous system on the car for a couple of
years before I used it because I was having trouble with a high speed
by-pass system on the injection. You have to be certain that the engine
is jetted correctly before using the nitrous. The nitrous system is
properly jetted, but if you are lean on the basic jetting, when the
nitrous comes on it gets expensive, and can shorten your week. I run the
fuel pressure on the high side to be safe. With gasoline, proper
pressure may be more critical, with alky being a little rich doesn't
matter that much.
It's fun, but be careful. See you at Muroc.
Tom, Redding CA - #216 D/CC
John Beckett wrote:
>
> Tom
>
> OK, now that I have Nitrous on the brain...hmmm...that's interesting. I
> have a few questions for those who run the stuff on the 'salt' or lakes. And
> you have been doing it successfully for some time now. 1) I guess you run
> with a Hilborn style injection system. So how do you plumb the
> system...fogger nozzles? 2) Do you run 1, 2 or more stages? and
> approximately how much HP per stage? 3) Do you use a controller? 4) When
> do you first apply the Nitrous? certain speeds, RPM? 5) How much Nitrous
> do you carry and use per run? 6) What's the traction situation like when
> you hit the button?
>
> Thanks
> John Beckett
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