hi guys,
I took the truck back to randy at www.haywoodspeed.com today. I installed some #60 injectors that I got from Sal this week to take care of the lean condition that I was getting above 5000 rpms.

the air/fuel is plenty safe now. we got that smoothed out nicely. again my PSP chip required almost no adjustment aside from the obvious air/fuel that was affected by my apten port/crower cams/extrude honed heads.

I was hoping to see some more power today with the tuning, but it was not to be. I did get a tiny bit of torque back.

so far, that's not the disappointing part. the truck did something like 510hp/552ft/lbs again, on a safe tune and 92or93 octane.

the disappointing part is that the main purpose of this trip to the dyno (which is about 2 1/2 hours away) was to run the truck with the nitrous.

I finished wiring the kit up this week and got the bottle filled for the first time last night.

well that's the problem. the nitrous filling station is a friends house. he builds drag race cars (very nice ones I might add) at home in his garage. he also has a nitrous filling tank. so I called him and told him I was coming by. no problem. when I arrive with my 15lb bottle, he tells me he's not sure how much he's got left. we try to fill my bottle and it only takes like 9lbs and he's empty. so I figure that it'll be ok. 9lbs should be enough to make a few runs anyway.

well apparently, I got 9lbs of mostly air. because even with my bottle heater and bottle blanket, I couldn't get the nitrous pressure above 950psi or so. so on the very first run, the nitrous tries to work (to the tune of something like 650ft/lbs at the wheels around 3800rpm ) but immediately dies. there was no nitrous left in the tank.

BTW, this was the very first nitrous run on the truck, and using NX's recommended jets, the air fuel was off the chart rich. the highest it ever got was maybe 10.5 to 1, but for the majority of the run, it was below 10-1 (off the scale rich). and for the few hundred rpms that it was actually half way working it was giving like 80 hp & 100ft/lbs at the wheels so I know the power is there, it'll just have to wait till another day.

I'll be running the truck at Richmond Dragway tommorow (weather permitting) to get some runs in on the new motor(without nitrous). wish me luck.

later,
chris

 

None the less...,,, you know what you got there, it will all come together for you. Sounds like you were getting a full helping of fuel and somewhat less nitrous , causing the rich conditions.
When I dynoed with my NX wet kit my fuel to air ratio was about .3 tenths richer across the pull. Just about what Sal at PSP said it would do.

 

that sucks!!!!!!
But at least u know when you have that full bottle the power will be there fo sure!!!!!!!

 

Air doesnt weigh anything unless its in liquid form and a N20 bottle doesnt have the ability to turn air into liquid.


Chris, it really sounds like you have a problem within the N20 System. If you got 9lbs of N20 when you left your buddies house it might have leaked somewhere before you got to the dyno. Ive run N20 on many vehicles and using a 10lb Bottle, I would always get 4-6 passes on a 150 Shot with a bottle pressure of 1050PSI. Even after the 4-6 passes I would still have a couple lbs left in the bottle. Just a FYI, good luck and look forward to hearing about that 10 sec pass tomorrow

 

Chris,
Sounds like the Beast is ready to rock, CONGRATS
GO GET UM TOMORROW

BTW, I don't think your gonna ever get it over 950 PSI,
I've never got mine over 900, thats the Max I've ever seen,
in the heat, with the Bottle Warmer on, btw thats also plenty.
Your problem was exactly what you said, you never got a full tank to begin with, and only part of the tank is usable even when it is filled. But you did get a taste of the power, and when you get it filled next time, I'm sure it's gonna rock BIG TIME

 

I am 100% new to the world of Nitrous, so anything's possible.

however, except for a quick leak (listening) check, and few blasts on the purge this morning before I left town, the bottle stayed closed from the time it was filled last night, until I got to the dyno? maybe it never really got any/much nitrous in it? I never actually saw the scale, but I trust the guy filling the bottle. he has no reason to lie to me, however he did seem to be having trouble filling the bottle. the guy knows his stuff, and his welding and fabricating ability is UNBELIEVEABLE, but this is a garage filling station, so it's possible that some "shadetree" techniques were employed

so as a total newbie to nitrous, let me ask some (maybe ignorant) questions. this bottle was 100% new never used, he tried to "refrigerate" it before filling LITERALLY, but it wouldn't fit into the freezer, so he cooled it with bags of ice. he used digital electronic scales to weigh the bottle. If I remember correctly, I think he said it weighed 20lbs empty? the bottle took VERY LITTLE nitrous on it's own. I want to say like 5lbs? and then he had to "push" the nitrous in with some rig he had that had a valve and attached shop air to the bottles somehow? sorry if this sounds stupid, and something cheesy was going on, but like I said, my experience with nitrous is slim to none. This guy builds Ford cars that go 6 seconds at over 200 MPH with LOTS of nitrous, so I know he knows his stuff.

again, I couldn't even get the bottle pressure to go past 950? I was only jetted for 100shot also.

who knows... I'll investigate further.

thanks for the input.

later,
chris

 

ha, I wish that was gonna happen, but it sure isn't going to happen with an empty bottle! I'm just hoping for a mid 11 tommorow on just the motor.

I'll post results, even if I run a 14.00!

later,
chris

 

Chris I watch them fill mine every time,
AND THAT AINT HOW IT SUPPOSE TO BE,
I mean ya there's a motor and noise happening when they fill it,
but I don't like the part about him doing something to force it in.
The bottom line with any Nitrous Bottle is, you can only use so much of the bottle, NOT ALL OF IT. When you run out of nitrous you of course know it because it's spraying fuel and fuel only and it'll boog down. Yet if you open that bottle valve with the line off you'll still have plenty of uump left in it, BUT NOT USABLE uump.

So if the bottle he's using to fill yours was empty "and at the bottom of the barrel", GUESS WHAT ? It's prob useless, and you prob didn't get enough of the important stuff .

The nitrous filling station is maybe 10 ft from the counter where I go. Unfortunatly my tank is usually in my truck roasting for 1/2 a day before I go at lunch and fill it. He weighs it, attaches the hose, and then does a few weird things to get the bottle cold. He bleeds it a while, fills it, emptys some, fills it again, sometimes bleeds it again, then fills it. Then only charges me for the weight it takes.

 

Freezing the Bottle lets the N20 transfer much easier, the easiest way to explain it is the room temp N20 will get sucked into the cols bottle. The colder the N20 the less pressure you have in bottle, so that means sometimes you can get a extra pound or 2 in the bottle.

A empty/semi full bottle also takes longer to build pressure than a full bottle, the reason you dont use the last few lbs of N20 in the bottle is because when the run starts you might have 950PSI but the minute you take off the bottle cools off(Like your air rachet) and pressure falls fast. This in turn mean by the end of your run your truck will be very rich because you have proper fuel pressure but dont have the proper N20 pressure. I dont doubt your work at all or the refill stations ability to fill the bottle, I just wanted to comment that if you indeed did have 9lbs go into the bottle that would be enough for several pulls on the dyno. (Unless you did alot of purging )

Appreciate the honesty even if you run a 14 and have fun

 

I think your gonna need sum front skinnies to complete the race look!!!
Cause if I am not mistaken, you only have Back bogarts....
You should get the fronts for that extra weights savings.......

 

Maybe he purges it like me, I hook everything up, open the valve,
put the heater on and start driving to the track. Once I'm within 10 or 15 minutes from the track, I purge it the old fashion way I look in my mirror for cops, get out my got dam seat, and stomp that pedal to the floor
Repeat at least two more times before entering the track

 

Heck I didn't know you were adding JUICE to that engine.

keep up posted