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Additional ignition timing for 60 feet"
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moparacer
DRR Pro
posted Hide Post
Well, with my slow junk 5.40-5.50 setup I can run as much as 42 degrees on alky and pull 6 out of it down track. It 60 fts pretty good if it hooks. Fat + a bunch of timing = good 60 fts for me.

I figgerd that out years ago.

I do it with my delay box timers and a step retard.....

Cutting edge stuff. Big Grin
 
Posts: 1661 | Location: PA | Registered: February 26, 2000Reply With QuoteReport This Post
B KING
DRR Pro
posted Hide Post
quote:
Originally posted by David Gerard:
quote:
Originally posted by Mark Yeager:
Can you get some ET be leaving higher on launch rpm?


I talked with COAN this week and he said with our tight TD 2 piece converter, the 60', ET, etc., would not significantly change with 500 RPM more launch stall.

He did say that it should improve RT's a little!


Many members suggested going up in launch rpm instead of adding timing. It seemed like you kind of dismissed the suggestions or maybe you did try them.

Here's a little bit of testing I did at this past weekend's TnT on Fri. Both runs were made in the right lane & I was unable to make a 3rd attempt because it was a cluster F...!

Anyway the 1st pass was made at our normal launch rpm. The 2nd run we added 400 rpm to the launch limiter.

Results:

1 lb. more boost at the launch & a quicker 60' by .022. This of course improved all times & mph down track.

I wanted to get the 3rd run in with another 400-rpm added to the launch rpm but that didn't due to the track cluster. That would have added another 2 lbs. of boost.

2BKING Smile

Relaxing


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3100 lbs.
Pump Gas 436
 
Posts: 3147 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
moparacer
DRR Pro
posted Hide Post
On my NA car 4500 RPM launch is 1.21-1.22 60 ft. IF it hooks. 4000 Puts me at High 1.23-1.24 range and is more consistent. So it slows me up roughly .02 to .025 also.
 
Posts: 1661 | Location: PA | Registered: February 26, 2000Reply With QuoteReport This Post
seabass
DRR S/Pro
posted Hide Post
quote:
Originally posted by B KING:
quote:
Originally posted by David Gerard:
quote:
Originally posted by Mark Yeager:
Can you get some ET be leaving higher on launch rpm?


I talked with COAN this week and he said with our tight TD 2 piece converter, the 60', ET, etc., would not significantly change with 500 RPM more launch stall.

He did say that it should improve RT's a little!


Many members suggested going up in launch rpm instead of adding timing. It seemed like you kind of dismissed the suggestions or maybe you did try them.

Here's a little bit of testing I did at this past weekend's TnT on Fri. Both runs were made in the right lane & I was unable to make a 3rd attempt because it was a cluster F...!

Anyway the 1st pass was made at our normal launch rpm. The 2nd run we added 400 rpm to the launch limiter.

Results:

1 lb. more boost at the launch & a quicker 60' by .022. This of course improved all times & mph down track.

I wanted to get the 3rd run in with another 400-rpm added to the launch rpm but that didn't due to the track cluster. That would have added another 2 lbs. of boost.

2BKING Smile

Relaxing


rpms on the line definitely help the bottom end, depending on the size of the blower


J.R. Baxter

""Fathom the hypocrisy of a Government that requires every citizen to prove they are insured ..but not everyone must prove they are a citizen."

2025 Miller
Rolla Competition Engines
ProCharger
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Abruzzi
 
Posts: 1619 | Location: Waxahachie | Registered: July 04, 2005Reply With QuoteReport This Post
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