Nitrous and Bracket Racing why is it not consistant? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-16-2008, 02:05 PM
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Nitrous and Bracket Racing why is it not consistant?

Does anyone know why Nitrous tends not to be consistant in bracket racing? Right now I am running a Zex plate system and it is all over the time slip (8.97 to 9.23 1/4 mi). I am not having traction problems, my altronics co2 senser says I am right at 13.6 to 1 and the car goes strait. Does anyone have any experience with a Pro Shot Fogger? Maybe it is the plate system that is the problem. I have also noticed other people having the same problems. I dont want to spend the money on a Fogger unless I can fine a regular guy like me that has made one work.

Bob
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Old 06-16-2008, 02:57 PM
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Why it`s not consistant could be several reasons, different atmospheric conditions and tune is likely one of those, but unless your using a control box to activate your nitrous at exactly the same time every pass at exactly the same reaction time then the time will be effected. I would also think shift points play a role in this also, as well as bottle pressure drop as you use more nitrous. Back in the days when we used to bracket race, we never used nitrous, we only used it on street style drags, it was too inconsistant for bracket racing. Besides that, the same 17 year old kid won every weekend in his granddaddy`s 78 ford extended cab pickup with a bone stock drive train, it had a piece of wood wedged under the accelerator pedal, it was slow as the day is long, but it ran almost dead consistant every pass. We didn`t go to many bracket races, we found them rather boring as the more performance you build, the less consistant it will be unless you got thousands of dollars to buy all these gadgets like a stutter box and a throttle stop.
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Old 06-16-2008, 03:10 PM
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LoL same here....at the local track theres a guy who has an old ford escort, dudes gotta weight in at about 350lbs and can hardly get into the car.

but in the foot brake class he'll talk the trophy every night that hes there.
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Old 06-16-2008, 03:15 PM
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Nitrous

It is controlled by MSD 7530. You make a good point on the bottle pressure and different atmospheric conditions. Even at 100 hp the nitrous adds a lot of hair to the shift timing. Shifting at exactly the same time under the added stress is most likely not happening. The car is deadly without the Nitrous, so I guess I could leave it off.

B
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Old 06-16-2008, 03:31 PM
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Best times with and without Nitrous

Sat Jun 14 08 2:17 pm
Time Slip For:
Car 80 Monza

RT .500
60 ft 1.232
330 ft 3.540
1/8 ET 5.551
1/8 MPH 123.75
1000 ft 7.296
1/4 ET 8.790
1/4 MPH 149.17

Sat Jun 14 08 3:41 pm
Time Slip For:
Car 80 Monza
RT .540
60 ft 1.293
330 ft 3.737
1/8 ET 5.877
1/8 MPH 116.41
1000 ft 7.728
1/4 ET 9.297
1/4 MPH 143.39


Not so bad without but that is at a 100 shot

Check out my journal on this car!

Last edited by Quarter Flash; 06-16-2008 at 05:42 PM.
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Old 06-16-2008, 10:17 PM
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DV too funny on that 17 year old. The 17 grabbed my attention right away. There used to be a Datsun B210 showed up like clockwork. Ran 16.90 (17) all the time every time. That dude went home with the money too many times.
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