Estimated Roll Out

JP1738 · 01-25-2024, 04:48 PM

Hey all, I'd like to start practicing on my practice tree as I finish up my stocker. What is everyone's estimated roll out? I need to know what to punch in for the settings on my practice tree. On my bracket car I usually set the roll out to ~.180-.200 (it's pretty lite, I can hit a .4 PT with it) and then use the delay box to account for the rest. I want to set the rollout up for the stocker and 0 the box out and just work on hitting a spot, but I want to to be kinda close so I don't have to do tons of adjusting to the car to move it to a spot I create. For a mid-alphabet car (L-P/SA) off the footbrake I'm estimating it will be around .330-.350. Does that seem about right to you guys? Obviously I know there is a ton of variability as far as weight, front end travel, hp, gearing, 2-step vs non-2-step and things of that nature. I'm just looking to ball park it. Any input would be great, thanks!

Dave Noll · 01-25-2024, 07:58 PM

I have mine @ about .275

GTX JOHN · 01-25-2024, 10:02 PM

.320 on our N/SA Wagon on Two step.

However, I am 75 year old.

JP1738 · 01-25-2024, 11:20 PM

Quote:

Originally Posted by GTX JOHN

.320 on our N/SA Wagon on Two step.

However, I am 75 year old.

That’s just the info I needed to hear, many thanks!

P.S. age is just a number!

killintime6968 · 01-26-2024, 03:15 PM

That would be 75 years smarter. LOL

Dan Bennett · 01-26-2024, 06:13 PM

I was always into tech so when the Vericom200 came out in the late 80s I bought one. Refresh rates and sensor response was not what it is today so take this with a grain of salt.

I bought it to have a testing means when I wasn't at the track. I was racing a Buick GN at the time and trying all sorts of different chip tunes.

I always took it to the track so I compare what it read compared to the clock. The accelerometer in it did not account for rollout. So consistently, the ET it displayed was .3 off from my time slip - it never varied.

Just another data point, but remember that I was running street tires on the front.

01-25-2024, 04:48 PM	#1
JP1738 Member Join Date: Jan 2024 Location: Charlotte, NC Posts: 191 Likes: 392 Liked 315 Times in 96 Posts	Estimated Roll Out Hey all, I'd like to start practicing on my practice tree as I finish up my stocker. What is everyone's estimated roll out? I need to know what to punch in for the settings on my practice tree. On my bracket car I usually set the roll out to ~.180-.200 (it's pretty lite, I can hit a .4 PT with it) and then use the delay box to account for the rest. I want to set the rollout up for the stocker and 0 the box out and just work on hitting a spot, but I want to to be kinda close so I don't have to do tons of adjusting to the car to move it to a spot I create. For a mid-alphabet car (L-P/SA) off the footbrake I'm estimating it will be around .330-.350. Does that seem about right to you guys? Obviously I know there is a ton of variability as far as weight, front end travel, hp, gearing, 2-step vs non-2-step and things of that nature. I'm just looking to ball park it. Any input would be great, thanks! __________________ #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide Last edited by JP1738; 01-25-2024 at 05:04 PM.

01-25-2024, 07:58 PM	#2
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 694 Likes: 2,270 Liked 220 Times in 105 Posts	Re: Estimated Roll Out I have mine @ about .275 __________________ Dave Noll, E/FS ,L/SA 6526

01-25-2024, 10:02 PM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,540 Likes: 2,238 Liked 1,878 Times in 578 Posts	Re: Estimated Roll Out .320 on our N/SA Wagon on Two step. However, I am 75 year old. __________________ John Irving 741 Stock 741 Super Stock

01-26-2024, 03:15 PM	#5
killintime6968 Member Join Date: Oct 2009 Location: Whitecourt,Alberta,Canada Posts: 227 Likes: 3,870 Liked 42 Times in 24 Posts	Re: Estimated Roll Out That would be 75 years smarter. LOL __________________ Bruce Cameron 68 Nova 396 E/S 68 Camaro SS/? ex Checkmate Modified

01-26-2024, 06:13 PM	#6
Dan Bennett Member Join Date: Jun 2007 Posts: 361 Likes: 573 Liked 359 Times in 82 Posts	Re: Estimated Roll Out I was always into tech so when the Vericom200 came out in the late 80s I bought one. Refresh rates and sensor response was not what it is today so take this with a grain of salt. I bought it to have a testing means when I wasn't at the track. I was racing a Buick GN at the time and trying all sorts of different chip tunes. I always took it to the track so I compare what it read compared to the clock. The accelerometer in it did not account for rollout. So consistently, the ET it displayed was .3 off from my time slip - it never varied. Just another data point, but remember that I was running street tires on the front.