Who's using.....

[hlmrx1]

Interesting little tidbit of information for you guys. Boondocker NOS system was just dyno'd on a sled Tuesday by a good friend of mine. It was claimed to be a 75 hp shot of NOS. The dyno showed only a 37 hp gain.

So how can these guys claim that it's a 75hp shot? It will be interesting to see others dyno'd, could there have been other issues with this particular sled?

 

[NOS-PRO]

From what I have heard, a couple systems have been dynoed, but Srxspec's result shows proof from that system. I just talked to the guy again by me, and he said he can get me in towards the end of July.

This is from 1 system, and there was another system dynoed, that had the same results. I want to know how mine rates, so I am getting this done with my own money and time. (not to mention my sled)

Let's get the truth down on paper.

 

[RX1LARRY]

I had my rx1 dyno in 2004 with aftermarket exhaust. With dyno matched to the sleds tach (taken into consideration the gear reduction) Max hp was 146 and then with stock exhaust without consideration of gear reduction the sled put out about 130+ hp. So your results may vary dpending on what your looking at. How do you adjust a speedtrack in a yamaha suspension?

 

[HAMMER]

Unless your (enter brand name of N2O system here) was tested on a fully instrumented dyno, on your sled, you really have no idea what the true air/nitrous/fuel ratios will be or exactly what your power increase will be. The difference between possible system horsepower and actual system horsepower (state-of-tune) on any brand system can be HUGE !!! I had a BoonDocker's kit on my big bore Viper that took some trial & error tuning but in the end it would snap the tach from 8600 (45mph track speed) to 9100 (60mph track speed), and hold it there. This was under full engine load, hillclimbing. I have no idea if it was close to the 30hp claimed but "felt" pretty dang close to me.

NOTE:

"The power always comes from the fuel source. Nitrous oxide is not a fuel. Nitrous oxide is a convenient way to add the additional oxygen required to burn more fuel. If you add only nitrous oxide and do not add additional fuel you just speed up the rate at which your engine is burning the fuel that it normally uses. The energy comes from the fuel, not the nitrous. Nitrous oxide simply allows you to burn a greater quantity of fuel in the same time period. When problems are encountered reduce the size of the nitrous jet first! Power comes from the fuel, not the nitrous. So trying to cool things down by adding fuel simply adds more power and in most cases only increases the magnitude of the existing problem/s."

DYNOTECH:

"Randy came back to re-dyno his 830 big bore not only for NA comparison but also to update the BossNoss N2O system. On his first visit Randy blasted his BossNoss N2O system wide open, creeping his fuel mixture to max fuel/N2O mix. 25 HP over NA on a system that was supposed to add 60 HP. It appeared that the single tiny 1/8 ID nylon line feeding N2O into the two airbox fittings created a restriction. This time, with the restriction of nitrous regulator outlet reduced (now a 1/8 npt tee at the regulator to two 1/8th inch nylon hoses individually to two big airbox N2O blasters) we maxed out at 200 plus HP. This took several hours of dyno tuning to tweak into the HP curve you see here. Still not 60 HP but surely a good blast at 40 HP. Like every other N2O system, fine-tuning, on an instrumented dyno like this is a necessity."

 

[firecat]

i am gona stick with a 60 shot,,, so it will last me a little longer, filling up , and down time off the juice sucks
________
Honda Cr-X Del Sol

 

[NOS-PRO]

I have a dyno session in 2 weeks for the Apex on/off the juice. An opening became available, and I took it. This will be my Apex (Attak), and dynoing track horsepower. Now.......this will be down on power due to the track being tested and not the engine crank, so don't be shocked when results are in. Anybody know what it should be for track horsepower? Any guesses?

 

[HAMMER]

At "Factory Specs" an Apex makes 80hp on a track dyno. (give or take)

 

[yamahajunkie]

dont lean her out too much nos-pro, just to get a good #!!!

what track are you running on the dyno, the slick?

 

[pro116]

dyno

YamaJunkie the track dosen't touch the ground on a track dyno like the cars do there is a mock up suspension or some use the stock skid that you bolt in the tunnel and adjust to the legnth of the track here is some pics to give you an idea. www.dynocheck.com/ www.xlr8performance.com

 

[yamahajunkie]

cool thanks

 

[NOS-PRO]

Actually, the track will be the slick for asphalt, and track will be driving the dyno. There was controversy on how much track will be in contact with the dyno, but I mentioned I will do a nice burnout to clean off track and make a little sticky. This dyno has been used for motorcycles, quads, and sleds with regular tracks, (unstudded).

 

[Srxspec]

The sled I mentioned previously with a 75 hp shot that only registered 37 actual HP was on the Dynotech dyno.

Terry, that track dyno is slightly different from ours. I've also never dyno'd a sled with an asphalt slick, but we see on average 85-88 HP depending on miles on the sled. On the nitrous you should pick up at least 25 more to the track.

 

[NOS-PRO]

So, on a sled producing 80-85 track hpr., for a true 100 shot, we should see 130'ish hpr. numbers?

 

[Srxspec]

Yes, if it was adding a true 100 hp (making 250 hp all together) should be in the 130 track hp area, yes.

 

[dirkdiggler]

So, on a sled producing 80-85 track hpr., for a true 100 shot, we should see 130'ish hpr. numbers?

Are you using nozzles that equal a 100hp shot right now Terry??