S/G Launch RPM

BIGG18c · 04-08-2024, 10:33 AM

I am finishing up re-doing a 27 Roadster I bought turn key in the fall. This is my first drag car to have a Trans-Brake and will be my first car to run on a pro tree. I was wondering if anyone could share what they are setting the launch rpm at on their cars to give me an idea were to start with mine. Hoping to license the first weekend in May! 509 BBC backed by a ATI ProGlide, Dana 60 4.11 gears. Thank you all in advance, this will be a huge learning curve coming from my footbrake 11 second nova.

Lenny5160_v2 · 04-08-2024, 11:48 AM

Quote:

Originally Posted by BIGG18c

I am finishing up re-doing a 27 Roadster I bought turn key in the fall. This is my first drag car to have a Trans-Brake and will be my first car to run on a pro tree. I was wondering if anyone could share what they are setting the launch rpm at on their cars to give me an idea were to start with mine. Hoping to license the first weekend in May! 509 BBC backed by a ATI ProGlide, Dana 60 4.11 gears. Thank you all in advance, this will be a huge learning curve coming from my footbrake 11 second nova.

5000 is a decent place to start. First of all you need it to be high enough to cut a light, then you can play with it up or down according to what the car seems to like.

JP1738 · 04-09-2024, 11:12 AM

Lenny, that seems a touch high to me. Given its a big block roadster and likely pretty lite, I'd say it won't take much. I try to keep my stuff as calm off the starting line as possible to mitigate the risk of looping the tire or darting one way or another. I have mine set to 4200, but I have quite a bit more gear than this guy. It might take 5k to get it to move with a 4.11 gear, but I'd start low and work my way up if I had to.

I've got mine set up where I have just enough bulb to run .005-.010 delay everywhere I go. Prints 60ft tickets and never gives me the weenie, at least off the starting line.

BIGG18c · 04-09-2024, 11:46 AM

Thank you both for the tips! The car is supposed to weigh 2300 with me in it. Have not fully finished it to get the scales out yet. I think I will meet you both in the middle and start around 4500. I do truly appreciate you guys taking the time to give me advice!

Lenny5160_v2 · 04-09-2024, 12:56 PM

Quote:

Originally Posted by BIGG18c

Thank you both for the tips! The car is supposed to weigh 2300 with me in it. Have not fully finished it to get the scales out yet. I think I will meet you both in the middle and start around 4500. I do truly appreciate you guys taking the time to give me advice!

That seems reasonable. Especially with getting used to a new car that is much different than you are accustomed to, starting low is probably a good choice. You can always bring it up if you need to.

Good luck with it!

I see you're a D5 guy; maybe I'll see you out on the trail this year. I should be at all of them.

BIGG18c · 04-09-2024, 02:01 PM

Quote:

Originally Posted by Lenny5160_v2

That seems reasonable. Especially with getting used to a new car that is much different than you are accustomed to, starting low is probably a good choice. You can always bring it up if you need to.

Good luck with it!

I see you're a D5 guy; maybe I'll see you out on the trail this year. I should be at all of them.

Lenny- I plan to license at BIR the first or second weekend of May then be at Tri State for the double National Open if all goes well!

Mark Yeager · 04-09-2024, 12:58 PM

Quote:

Originally Posted by BIGG18c

Thank you both for the tips! The car is supposed to weigh 2300 with me in it. Have not fully finished it to get the scales out yet. I think I will meet you both in the middle and start around 4500. I do truly appreciate you guys taking the time to give me advice!

I leave between 4500-4800. 2140 lbs. I carry .030-.040 in delay. Good luck!

04-08-2024, 10:33 AM	#1
BIGG18c Junior Member Join Date: Aug 2021 Location: North Dakota Posts: 36 Likes: 13 Liked 34 Times in 13 Posts	S/G Launch RPM I am finishing up re-doing a 27 Roadster I bought turn key in the fall. This is my first drag car to have a Trans-Brake and will be my first car to run on a pro tree. I was wondering if anyone could share what they are setting the launch rpm at on their cars to give me an idea were to start with mine. Hoping to license the first weekend in May! 509 BBC backed by a ATI ProGlide, Dana 60 4.11 gears. Thank you all in advance, this will be a huge learning curve coming from my footbrake 11 second nova. __________________ Grant Christianson C521 S/G,S/C, Pro ET.

04-09-2024, 11:12 AM	#3
JP1738 Member Join Date: Jan 2024 Location: Charlotte, NC Posts: 309 Likes: 701 Liked 535 Times in 165 Posts	Re: S/G Launch RPM Lenny, that seems a touch high to me. Given its a big block roadster and likely pretty lite, I'd say it won't take much. I try to keep my stuff as calm off the starting line as possible to mitigate the risk of looping the tire or darting one way or another. I have mine set to 4200, but I have quite a bit more gear than this guy. It might take 5k to get it to move with a 4.11 gear, but I'd start low and work my way up if I had to. I've got mine set up where I have just enough bulb to run .005-.010 delay everywhere I go. Prints 60ft tickets and never gives me the weenie, at least off the starting line. __________________ Dawson Pauley #2827 N/SA 1980 Malibu SW 2S 305/180 #2827 S/ST 1978 Mazda RX7 w/ 383 sbc/glide

04-09-2024, 11:46 AM	#4
BIGG18c Junior Member Join Date: Aug 2021 Location: North Dakota Posts: 36 Likes: 13 Liked 34 Times in 13 Posts	Re: S/G Launch RPM Thank you both for the tips! The car is supposed to weigh 2300 with me in it. Have not fully finished it to get the scales out yet. I think I will meet you both in the middle and start around 4500. I do truly appreciate you guys taking the time to give me advice! __________________ Grant Christianson C521 S/G,S/C, Pro ET.