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ofm7432 · 03-20-2005, 07:00 PM

For all the NoX junkies..... outside of traction (which is an issue for me) is it any easier on parts to bring the nitrous in after initial launch, say around the 60ft. mark? Also, are there any alternatives to the $400. - $500. delay boxes that are out there now? For a weekend racer on a budget that may be overkill, but I can't think of another way to do it outside of manually triggering it (which I assume would hurt having consistant times).

Region Warrior · 03-27-2005, 09:05 PM

No, not yet Brian. I have a plan with my old 400/#12Dport/Q-jet carb for my 79TA. But at 3400lbs without alot of $$ and breakage?

PONTIAC DUDE · 03-23-2005, 07:05 AM

I haven't rebuilt mine and have the same ones for a couple of years. I think it depends on the quality of the unit and pulsations it has. But I can see how it is harder on them with the constant pulse till they are WFO.

With The Schnitz timer, you can change the pulse rate along with percentage of hit, time of hit and length of the hit.

PONTIAC DUDE · 03-27-2005, 05:46 AM

Brain. The reason they popped a lot of blowers in the past was the Nitro mix.
I think NHRA finally decided that 90% Nitro to 10 % alcohol is a lot safer and track/time constraint/cleanup friendly.

Nitro is basically like a nitrous engine, except the air charge, etc is containted in the mix itself instead of adding the two together as in a Nitrous combo. Nitro is it's own Power adder even without a blower.

MB1966: Just make sure it's a good unit. When they first came out there were a lot of issues with them. More so then not, it was the design/quality of the product or tuner that was 90% of the problem.

Region Warrior · 03-23-2005, 03:16 PM

Thanks DUDE. I forgot about the valves.

It's so easy to get tunnel vision sometimes.

Brian Baker · 03-25-2005, 08:42 PM

HYDRAULIC!

I swear, I think I'll f#%king puke if I see another person misspell this word (or any other common word) while engaging (or trying to engage) in a technical discussion.

I know ZIP about firehose nozzles, with one exception. They don't go from being 100% closed to 100% open as quickly as a nitrous/fuel solenoid does. I imagine part of this is because it takes even the strongest human longer to ramp that nozzle valve to 100% open than it does for an electric solenoid to ramp its valve to 100% open. For all intents and purposes, when comparing the solenoid to the fire hose nozzle, the solenoid is being opened to 100% instantaneously.

Is the solenoid getting "hammered" when "stuttering" it with a progressive timer? Depends on what you mean by the term "hammered". You see, the solenoid will see the same conditions (ie - pressure spikes on the inlet side) when closed over a longer period as it does when it is "stuttered" with the timer. It's just seeing more of them, over shorter periods of time when being "stuttered" with the timer, and like any mechanical device, this will result in an accelerated wear rate.

'Dude already covered it pretty well concerning atomization and the "tuneup" with his most recent posts, so there's no need to beat the horse any further in that respect.

Ray Cox · 03-23-2005, 07:38 AM

If they want to call they can make up there own mind Im not going to argue with you about it because Ive learned you cant argue with stupidity

PONTIAC DUDE · 03-27-2005, 05:41 PM

Yea, safer. And when is 7000 hp safe anyway. LOL.

Brian Baker · 03-21-2005, 11:13 AM

So...has NoX replaced NAWS as the new buzzword for nitrous amongst the younger crowd?

Ray Cox · 03-26-2005, 01:03 AM

the problems created with a progressive are not the destruction of the cylinoid, they can be replaced!

so I guess not caring about exact spelling on every word means Im not qaulified to talk about nitrous? Im not sure what meets your qaulifications brian to talk about nitrous, but even when I ran a wet deck my tune ups didnt lift the heads enough to pop freeze plugs

I guess I need to stop talking about nitrous since Im not qaulified

Brian it is an extreme example but since your into the blowers and nastalga cars, what happens to a top fuel car when they try to pedal it at half track? and it was a more serious problem in years past but is now getting better with new nozle technology

PONTIAC DUDE · 03-23-2005, 07:36 AM

The reson why.....The Big Dawgs don't run em is.........
One; they got a tire and suspension to handle the initial hits. Plus most Big Dawgs have multiple stages (up to 4 stages now,

) to regulate how much hp to hit the car with initially.

ofm7432 · 03-22-2005, 03:25 PM

Thanks for the info guy's. Has anybody used an RPM activated switch for the nitrous? I was just wondering about the reliability of using it as opposed to a controller.

ofm7432 · 03-20-2005, 07:39 PM

Thanks Jeff, I thought of activating it by RPM, but like you I was concerned about how that would work if the RPM's dropped below the setting. As of now I'm shifting at about 6500 and to tell you the truth I never paid attention to how far the RPM's dropped between shift's. I am set up though....I think? I'm running an MSD Digital 6AL and also with not having the fuel pressure gauges in the car, I have a fuel pressure safety switch inline with the dedicated nitrous fuel line, along with a full throttle microswitch on the carb.

Jeff V · 03-20-2005, 07:14 PM

You could use a RPM activated switch,if you have MSD.Set it at 3500-4000 and it would come on early in the run and stay on as long as the rpm didn't drop below 3500-4000.As long as you back the timing up and follow the NOS instructions(don't engage before 3000,fuel pressure,etc,etc.)it really doesn't matter when you cut it on ,it's going to be hard on parts.

PONTIAC DUDE · 03-23-2005, 02:00 PM

I could be wrong, but running one for 4 years and no major issues when I got the right box that held up. And knowing others using them 'from experience' I just put it out there for anyone to sort out.

Region Warrior · 03-25-2005, 10:51 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Ray Cox:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PONCHOSHOP:
Thanks DUDE. I forgot about the valves.

It's so easy to get tunnel vision sometimes.

</div></BLOCKQUOTE>Mike you posted at 5.30 so I know bush is not clowding your vision yet,what state is the fuel in at the cylinoid? and what state is it in at the valve? and how dose all of that relate to your your hydrolics and liquid things from the fire dept? </div></BLOCKQUOTE> 4;30 our time, still at work. Solenoid, liquid. Nozzle, gas. I guess my question is; are the solenoids getting hydrolic hammered? And, unless nitrous plate's nozzles sprays a thousend times better then a fire hose nozzle on the initial opening?

How do you know when a fuel solenoid fails? Is there a safty switch to shut off the nitrous side?

As for the cyl. hd. vlvs, they are opening/closing so fast, it probly doesnt matter. Im by far no expert on this subject, just tring to learn.

PONTIAC DUDE · 03-26-2005, 09:43 AM

http://cgi.ebay.com/ebaymotors/ws/eB...964149272&rd=1

Ray Cox · 03-25-2005, 07:07 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by PONCHOSHOP:
Thanks DUDE. I forgot about the valves.

It's so easy to get tunnel vision sometimes.

</div></BLOCKQUOTE>Mike you posted at 5.30 so I know bush is not clowding your vision yet,what state is the fuel in at the cylinoid? and what state is it in at the valve? and how dose all of that relate to your your hydrolics and liquid things from the fire dept?

PONTIAC DUDE · 03-23-2005, 07:32 AM

Bob Joysey. The past WORLD RECORD HOLDER in your class, Ray, set the record and won the championship with one.

Bill Joysey, the ole man, talked me into the Schnitz as I was having issues with the NOS brand unit at the time.

I have gone constant 9.0's & 8.90's with one and no issues.

But I guess I.m a wanna bee. LOL.

Region Warrior · 03-23-2005, 01:22 PM

I'm not to knowledgeable about progressive systems. Seems to me your hammering the engine 3 or 4 times instead of just once. Having studied water hydraulics for firefighting, i would be very concerned about switching system on & off several times during a run. Turn your garden hose on & off at full pressure a few times. You will notice a sudden jolt & movement in the hose. This is called a water hammer. It slams back to the source. This has been known to damage firetruck pumps & break hoses. I've witness'd hose breakage on fire scenes. Also notice spray pattern isnt that great when first opened. I know, Nitrous systems have better nozzels, but still i wonder. Another thing is how do you keep flow reversion down in the runners? And does this affect even flow to all cylinders?

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