Wow

GY3 - What are the respective 60 / 660 ET & MPH for those different 1/4 passes?

Had to watch this "for informational purposes only", naturally --> https://www.youtube.com/watch?v=7rc5Og8J_4U

I wouldn't worry about running too fast at Capitol....put a fogger on it.

My entire build and documentation thread is here along with slips and they're all there if you want to sift through it. I'm not that good at documenting runs and weather like bracket racers are because I'm just fooling around on Friday/Saturday nights.

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/428197/13/my-63-dodge-330-project.html

Off the top of my head, the 250 shot 10.01 was a 1.36 60 ft. with a 6.33 1/8th mile time. The 200 shot it ran 6.49 with a 1.37 60 ft. ( recall the last one distinctly because it had NEVER ran a 6.50 and I entered a 6.50 index that night. It ran a 6.52 on a test pass and first elimination round it ran a 6.49 and broke out by a hundreth!

From a drag racing perspective, I guess the only downside to Nitrous is if you have a combo with a really loose converter and you're gearing is already "optimized" (just past your power peak at the stripe), you might either have to tighten it up and/or take gear out of it to take full advantage of it.

Misc thoughts
- I like the idea of a controller to feed it in more gradually
- still feels like something that I could use only in the 1/8 for WOT runs
- suppose the option is there for going from 275/60 to 295/65 to lower the RPM on the big end
- not only are the ring lands "up there" at .175" down from the piston deck, but the gaps aren't intended for big spray either since they're .020/.024 IIRC

I have this controller:

https://www.summitracing.com/parts/nos-25974nos

It's reasonably priced as far as electronics go, and it's working flawlessly. I used it at Roadkill Nights to ramp in the nitrous over ~1 second. It can control 2 solenoids independently or in unison depending on how you set it up, can use any type of WOT switch as an input, will output a signal to a retard box, and will read RPM from your tach signal so you can have an RPM window on nitrous activation- you don't want to spray it at too low of an RPM, or on the rev limiter. You can also shut the solenoids off after a certain amount of time with the ramps, so if you only wanted to spray to the 8th and shut it off you could do it without having to do anything in the middle of the run, the controller would handle it for you.

I added a transducer for bottle pressure later- you don't need the Holley specific one, it just has to have the correct range.

As GY3 mentioned though- you see the most benefit from spraying as much as you can immediately if the track can take it. My car picks up 1.1-1.2 seconds on a 73 jet (around a 180 shot).

Personally, I wouldn't worry about your current ring gaps for just a 150 shot. I also wouldn't worry about a controller for just a 150 shot. At most, use a digiset timer to delay activation.

https://www.robietherobot.com/nitrousjetcalculator.htm

Here is a site that has a lot of good information including the temp to bottle pressure ratio. I used to use a small gauge on the bottle (that was junk) and plan on putting a larger gauge and shutoff next to the drivers seat eventually, (getting the pressure off the solenoids as soon as possible prolongs solenoid life) but for now I shoot the bottle with a Fluke IR temp gun and that tells me the temp and pressure the bottle is at. I shoot for 91* typically. I do have the pressure switch that shuts off the heater but still like to monitor temp/pressure.

At the very bottom of the page it has a jet chart that tells you what power to expect (if the plate isn't a restriction) out of a certain size jet. It seems to be pretty accurate in my experience.

A BB swallows a 150 shot like it's a puff of cold air!

More misc thoughts...

Current converter may be a little tight for NA, but won't know for sure until track results

A "true" 150 shot would push things to 830-850 HP based on last engine dyno tests; good thing the 8.75 has been replaced by the Strange S-60

This could be a lot of fun... or a really bad idea

Only unless you get stupid it with it - I ran a lot of nitrous back in the late 80's and early 90's - three stages with two fogger systems and 1 plate system under the carbs - yeah I got stupid with it more than once and paid for it - If you use the jet-able plate system start small work your way up - I always suggest you have a separate fuel pump for the nitrous and use a good controller! it can get real addicting with horsepower in a bottle!

I have sprayed 250 shots on numerous bone stock vehicles over the years with just backing off timing and good fuel. Never blown up an engine to this day. Even on nitrous.

Just because it sounds like a bad idea doesn't mean it won't be a good time.