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582 Camshaft
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DRR Sportsman
Picture of DRB Motorsports
posted
Built a 582 . Seems kinda off/slow. Rfd 24-b, 383cfm heads. 15:1. Cam specs are 900/855, 282:292@.050,113 lobe center insralled to 109 per cam card. 1950lb dragster, 4.10 with mt 15/35/16,s.apd 1250 alky. Ign timing @34.Best mph 140/141 so far. Thoughts? Comments?


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Pro
Picture of AlkyIROC
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My only comment is that is a big cam. It's bigger than what I use in my 588 but you're also a little over 1000 pounds lighter than my car.


www.hardtail.com Stephen's Racing Page
Best ET: 9.029
Best MPH: 150.45

 
Posts: 1252 | Location: Calgary | Registered: June 06, 2001Reply With QuoteReport This Post
DRR Trophy
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I think its a little short on duration. 285/306 on a 114 runs better.
 
Posts: 139 | Location: pa | Registered: September 23, 2002Reply With QuoteReport This Post
DRR Trophy
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My duration is 282/296 114 center installed at 112. try moving it to 111-112.
 
Posts: 51 | Location: Ohio | Registered: December 19, 2014Reply With QuoteReport This Post
DRR Pro
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quote:
Originally posted by DRB Motorsports:
Built a 582 . Seems kinda off/slow. Rfd 24-b, 383cfm heads. 15:1. Cam specs are 900/855, 282:292@.050,113 lobe center insralled to 109 per cam card. 1950lb dragster, 4.10 with mt 15/35/16,s.apd 1250 alky. Ign timing @34.Best mph 140/141 so far. Thoughts? Comments?


Cam is definitely short on duration on the EX side but your combo seams way off still. I am sure the tall tires aren't helping with that rear gear also! What's the converter stall for this combo? I'd try to use a shorter set of tires just to see how that effects your performance, something around 105 rollout.
 
Posts: 1203 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
DRR Sportsman
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I probably should have checked that before posting to get recommendations, but just a pain in the ass with the grid. haven't taken the lap top to change the two-step rpm so i can flash it. the converter flashed 6400 before the motor blew up and we rebuilt it.


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR S/Pro
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If you have the grid, you should be able to see the flash in the rpm graph. You dont need to raise the limit an flash it.


No Box Bracket Challenge 2018

 
Posts: 549 | Location: Lenox MI | Registered: January 05, 2003Reply With QuoteReport This Post
DRR S/Pro
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You have every right to believe your camshaft is problematic. It is. Every area of it, is incorrect.

582 Head Hunter 24 degree, 2.375 intake, 1.850 exh, cast manifold, single 1250 carb, 1985 pounds. 155 mph at 660.


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WD dealer for just about all your performance needs.
 
Posts: 1630 | Location: Suffern, NY | Registered: November 03, 2001Reply With QuoteReport This Post
DRR Pro
Picture of 68TSCAMARO
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Righhtttttttttt......
 
Posts: 856 | Location: middle georgia | Registered: July 20, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of DRB Motorsports
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What up Tbar?!


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post



DRR Sportsman
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You ever check the roll out on those rears. Yikes. Especially with only a 4:10. You ever thought about a little better LC like a 115 or so. I prefer to stay at no more than 850-860. for stability.Good luck to you.
 
Posts: 388 | Location: Under a Truck | Registered: August 23, 2013Reply With QuoteReport This Post
DRR Pro
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Replay the grid and see what the fall back rpm is after shift . That will be you a stall rpm idea . It takes 1150 HP to run 155 in 1/8 at 1985 lbs in a perfect world .....what rpm does it shift at ?
 
Posts: 856 | Location: middle georgia | Registered: July 20, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of DRB Motorsports
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7300-7500


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Pro
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quote:
Originally posted by 68TSCAMARO:
Replay the grid and see what the fall back rpm is after shift . That will be you a stall rpm idea . It takes 1150 HP to run 155 in 1/8 at 1985 lbs in a perfect world .....what rpm does it shift at ?

You mean in a Strange World....... Big Grin
 
Posts: 1203 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
DRR Pro
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Mr. Top knows lol ...jmo but I think you probably have several issues going on . There definitely should be more power there .
 
Posts: 856 | Location: middle georgia | Registered: July 20, 2003Reply With QuoteReport This Post
DRR Sportsman
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So pulled my runs of the Grid yesterday, but all the runs collected only show 1.2 seconds of the run on all of the ones we pulled? Under settings, it showed cutoff RPM was 3000, post time 1 second, and max time was 300 seconds?! What do I need to change?


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Trophy
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Click on Data Acquisition Tab.

Then click on the Start Recording tab.
Mine is set to:
Engine RPM Above 500 RPM
AND Step 1 (Most people set this to Launch Input, but I use step one to check delay box)
State On

Next, click on Stop Recording tab.
Mine is set to:
Engine RPM Below 500 RPM
OR Launch Input
State Turns Off
Post-Trigger Time 8 SEC
Max Recording Time 45 SEC

Those settings work fine for me, you may want less Max recording time but that's personal preference..

This message has been edited. Last edited by: Iforgot,
 
Posts: 128 | Location: South MS | Registered: September 07, 2015Reply With QuoteReport This Post
DRR Sportsman
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WHILE YOU'RE ASNWERING QUESTIONS, SHOULD YOUR MAX TIMING REFERENCE BE WHAT YOUR BASE IGNITION TIMING IS?


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Sportsman
Picture of DRB Motorsports
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spanky PM sent


Michael Frizie
ET 2471
2011 Diamond Chassis Dragster
DRB Race Engines 584 BBC
Neal Racing Transmissions
 
Posts: 238 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Trophy
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quote:
Originally posted by DRB Motorsports:
WHILE YOU'RE ASNWERING QUESTIONS, SHOULD YOUR MAX TIMING REFERENCE BE WHAT YOUR BASE IGNITION TIMING IS?


Well, it COULD be, depends on what you want to do.
What do you want your timing curve to look like?
 
Posts: 128 | Location: South MS | Registered: September 07, 2015Reply With QuoteReport This Post



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