Looking to try my hand at some top bulb racing.

Wondering what would be a starting delay box setting.

2700 lb door car, should be in the 4.90 et range.

It's all going to depend on car, driver reaction, etc....for a starting point, you can put 1.2 seconds in it and do a few hits then adjust from there...

pro brake or std? if pro 1.050 if regular 1.000 as a start and go from there. There are alot of variables

quote:

Originally posted by HR3377:
pro brake or std? if pro 1.050 if regular 1.000 as a start and go from there. There are alot of variables

Pro brake 3 speed

Whats your normal tree on a 4 or 5 tenths pro?

quote:

Originally posted by NortonRacing:
Whats your normal tree on a 4 or 5 tenths pro?

.500 full tree.

In a fast car with a 3 speed, I'd think 1.150 will be close.

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

how old is the OP? i am .020 slower than my 23 year old son.

i would start at 1.120 to 1.135 and then adjust.

ep

Just make the math easy.
2 hits with 1.0 second delay, add the amount you're red, plus .010

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

Ah, no. That's 20 green on a .370 Pro Tree with zero in the box.

quote:

Originally posted by Goob:
Just make the math easy.
2 hits with 1.0 second delay, add the amount you're red, plus .010

^^ This ^^

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

Ah, no. That's 20 green on a .370 Pro Tree with zero in the box.

1.000 is .000 500 pro tree right?

1.100 is .000 400 pro tree right?

1.130 is .000 370 pro tree right?

1.150 is +.020 or -.020 370 pro tree?

I've done some .370 racing, 6.50 index. I was told it was near impossible staged shallow 3200 lbs sbc.

JW fast valvebody, with a handful of test hits.

It can definitely be done, even on 10' wide bias slicks.

This message has been edited. Last edited by: Mike Rietow,

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

Ah, no. That's 20 green on a .370 Pro Tree with zero in the box.

1.000 is .000 500 pro tree right?

1.100 is .000 400 pro tree right?

1.130 is .000 370 pro tree right?

1.150 is +.020 or -.020 370 pro tree?

I've done some .370 racing, 6.50 index. I was told it was near impossible staged shallow 3200 lbs sbc.

JW fast valvebody, with a handful of test hits.

It can definitely be done, even on 10' wide bias slicks.

I see how you're thinking about it, but of course your ramblings are difficult to comprehend.

Yes, 1.150 would imply that the car can go -.020 red on a .370 Pro Tree.

1.150 is pretty common bracket dragster territory. A 4-second 3-speed car should be within range. I'm not telling him to roll up there first round with that setting, but it should be in the ballpark.

quote:

Originally posted by pauley:
how old is the OP? i am .020 slower than my 23 year old son.

i would start at 1.120 to 1.135 and then adjust.

ep

I’m 52 years old.

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

Ah, no. That's 20 green on a .370 Pro Tree with zero in the box.

1.000 is .000 500 pro tree right?

1.100 is .000 400 pro tree right?

1.130 is .000 370 pro tree right?

1.150 is +.020 or -.020 370 pro tree?

I've done some .370 racing, 6.50 index. I was told it was near impossible staged shallow 3200 lbs sbc.

JW fast valvebody, with a handful of test hits.

It can definitely be done, even on 10' wide bias slicks.

I see how you're thinking about it, but of course your ramblings are difficult to comprehend.

Yes, 1.150 would imply that the car can go -.020 red on a .370 Pro Tree.

1.150 is pretty common bracket dragster territory. A 4-second 3-speed car should be within range. I'm not telling him to roll up there first round with that setting, but it should be in the ballpark.

Definitely need to get some test laps to get an idea of where I need to be.

I have a full size LED bulb practice tree in the garage I wire to my T-brake button for practice, but with this being a new car, the car roll out setting is pretty much a guess.

Been using .24 rollout and 1.105 delay to come up with oh, teen and twenty lights.

No magic #!

If you are accustomed to leaving off the bottom bulb it'll take some adjustment to leave off the top bulb,mat the throttle, button pressure,...

Doesn't matter how old you are, what cereal you ate in the morning,what color your car is or if you're bald, every car is going to leave differently.

I used to zero everything out on my practice tree on a pro tree to have my personal reaction time. Try to group them close.
That's all a practice tree is good for in my opinion.

Put a number in and leave it there for as many passes you can get and adjust from there. Best would be a track rental. I know a racer that would run to past 60', stop, back up instead of making a full pass and try again 20 minutes later.

Your results may vary

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by Lenny5160:
In a fast car with a 3 speed, I'd think 1.150 will be close.

So, 020 red on a .370 pro tree.

I hope it ain't got small tires, none I know of that can do that, staged shallow.

Ah, no. That's 20 green on a .370 Pro Tree with zero in the box.

1.000 is .000 500 pro tree right?

1.100 is .000 400 pro tree right?

1.130 is .000 370 pro tree right?

1.150 is +.020 or -.020 370 pro tree?

I've done some .370 racing, 6.50 index. I was told it was near impossible staged shallow 3200 lbs sbc.

JW fast valvebody, with a handful of test hits.

It can definitely be done, even on 10' wide bias slicks.

I see how you're thinking about it, but of course your ramblings are difficult to comprehend.

Yes, 1.150 would imply that the car can go -.020 red on a .370 Pro Tree.

1.150 is pretty common bracket dragster territory. A 4-second 3-speed car should be within range. I'm not telling him to roll up there first round with that setting, but it should be in the ballpark.

It's not how I'm thinking about it. I defined what you implied by suggesting 1.150 delay.

Nothing more, nothing less.

If I did suggest a delay here based on the info in play, I'd also include don't plan on a good rt first at bat, unless it's pure luck.

Been using .24 rollout and 1.105 delay to come up with oh, teen and twenty lights. ____________________________________________
Some math. Full tree is 1.5 seconds from first to green.

1.105 + 0.240 = 1.345

1.500 - 1.345 = .155

Add the teen and twenty lights to .155 and that's "your" personal reaction time.


Years ago I was .170 to .180 on my practice tree. Thinking I'm a little slower now. But as long as consistent.

I'd put 1.100 in to start and adjust the box from there like Goob said. Make as many hits that you can. You could go 1.200 if they show RT on the scoreboard, everyone would think you are a duck. I wouldn't know anyone that would do that though

Good luck.

Thanks guys, good info.

Gives me a plan to pick a number and adjust from there. Should be ready to make some initial hits come spring. New car is almost done, just too late in the season to try and get out to test.