DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  Tech Talk - by Abruzzi    RPM Activated Switch
Page 1 2 
Go
New
Find
Notify
Tools
Reply
  
RPM Activated Switch
 Login/Join
 
DRR S/Pro
Picture of "The Bender"
posted
I'm going to need an RPM Activated switch for the shifter in my new build. I'm looking at the digital MSD 8969 so I don't have to deal with a whole bunch of chips. Is anybody using one and how do you like it?


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
 
Posts: 3081 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Pro
posted Hide Post
If it were me It’d be THIS or THIS if I was using Analog Ignition
 
Posts: 2290 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
I was looking at those too. Looked like overkill for what I need, but it does have some nice features. Have you used one?


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
 
Posts: 3081 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
I'll be using an MSD Hemi6 ignition. Which is digital.


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
 
Posts: 3081 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Sportsman
Picture of TD3550
posted Hide Post
I use the DD Elite. Has the shifter test.
 
Posts: 1401 | Location: Under a Truck | Registered: August 23, 2013Reply With QuoteReport This Post
DRR Pro
posted Hide Post
I have the Digital Delay unit that is linked above in my Lamplighter project. I am a few weeks away from track testing. However, it operates as expected with the MSD tester. I also like the option of shifting by time or RPM with the same unit.


Larry Woodfin



 
Posts: 1782 | Location: Kilgore TX | Registered: March 12, 2004Reply With QuoteReport This Post
DRR Pro
posted Hide Post
^^^^^^^^ X2 Call Charlie at DD.
 
Posts: 2290 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post



DRR Pro
Picture of CURTIS REED
posted Hide Post
quote:
Originally posted by "The Bender":
I was looking at those too. Looked like overkill for what I need, but it does have some nice features. Have you used one?


I am using the DD Elite time or rpm switch in my roadster and really like it. I use time to shift instead of rpm and I have one of the Little Wizard boxes for when I want to race in Super Pro and still shift with this.

Looks like he has 2 of them in the scratch and dent / refurbished section. That is where I bought mine and couldn't tell at all.



____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion

2018 Div4 Goodguys Hammer award winner
 
Posts: 2776 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Pro
posted Hide Post
I have developed a good relationship with Charlie at Digital Delay. He provides good products and good service.


Larry Woodfin



 
Posts: 1782 | Location: Kilgore TX | Registered: March 12, 2004Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
quote:
Originally posted by Larry Woodfin:
I have developed a good relationship with Charlie at Digital Delay. He provides good products and good service.

Agree 100%
They are very helpful everytime I have called.


BG
 
Posts: 756 | Location: Florence, SC | Registered: August 25, 2019Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
Charlie Hamma at Digital Delay, Amazing products, always willing to help and great service after the sale. jjj (FA)
 
Posts: 188 | Location: WI 53511 | Registered: October 05, 2000Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
Ok,Ok,Ok I ordered one! Big Grin


Thanks guys!


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
 
Posts: 3081 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Pro
Picture of jmarkaudio
posted Hide Post
Shift on time...




Mark Whitener
RFD Heads
FTI Converter
Fab Shop Headers
Home built 2 circuit Dominator :-)
www.racingfuelsystems.com
____________

Good work isn't cheap and cheap work can't be good.
 
Posts: 1045 | Location: Florida | Registered: November 16, 2007Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
Mark, I did that in the TD. Why do you think that is the way to go?


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
 
Posts: 3081 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post



DRR S/Pro
Picture of Big Steve
posted Hide Post
quote:
Originally posted by "The Bender":
Mark, I did that in the TD. Why do you think that is the way to go?


With the bracket car I always shifted on time that way it shifted at the same spot on the track each run. With the TD I shift on RPM because if it spins or smokes the tires I want it to shift early and try and recover quicker.
 
Posts: 2309 | Location: Moving back to the door side | Registered: April 30, 2010Reply With QuoteReport This Post
DRR Pro
Picture of 67TSCHEVY2
posted Hide Post
why would rpm not shift as close to the same spot as on time would ?
 
Posts: 1210 | Location: middle georgia | Registered: July 20, 2003Reply With QuoteReport This Post
DRR Pro
posted Hide Post
Camaro, in theory, under ideal conditions, RPM VS time shift would be the same place on the track. Yet, our world is not perfect. During the time span of a full race day, the conditions change [maybe only slightly] air, track, engine power output all change.

Thus, even though those changes might be small, RPM ****ed would become slightly different. So, in the quest for consistency in bracket racing, shifting on time holds the potential to be more accurate.


Larry Woodfin



 
Posts: 1782 | Location: Kilgore TX | Registered: March 12, 2004Reply With QuoteReport This Post
DRR S/Pro
Picture of Big Steve
posted Hide Post
The other thing nice about time shift is you can change the timer sitting in the water if you want to maybe speed up or slow you car down a little if you need too.
 
Posts: 2309 | Location: Moving back to the door side | Registered: April 30, 2010Reply With QuoteReport This Post
DRR Pro
posted Hide Post
Imho, without some sort of data acquisition, you are guessing which is more or less (rpm or time shift) consistent in your race vehicle. Charting the actual rpm the shift activated and what rpm the transmission completed the shift will better explain what is happening.
 
Posts: 2290 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR S/Pro
Picture of Lenny5160
posted Hide Post
Of course this could vary depending on where you set your shift time, but I always figured that if you are shifting on time and the weather got worse, when the car shifts at the same time you are now at a lower RPM and making that run even slower than it had to be.

If the weather improves, now the RPM is higher at a given time on track and so the run got quicker both because of the weather and the shift point.

Seems like it would make the swings wider unless the baseline shift point was a little higher than optimal, RPM-wise.


Tony Leonard
 
Posts: 3109 | Location: Inver Grove Heights, MN | Registered: March 18, 2004Reply With QuoteReport This Post
  Powered by Social Strata Page 1 2  
 

DragRaceResults.Com    Bracket Talk    Bracket Talk Forum  Hop To Forum Categories  Tech Talk - by Abruzzi    RPM Activated Switch

© DragRaceResults.com 2023