Better 60 foot times?
#1946791
11/07/15 05:04 AM
11/07/15 05:04 AM
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Joined: Jul 2004
Posts: 12,812 Tulsa, Oklahoma
Wagonmaster
OP
I Live Here
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OP
I Live Here
Joined: Jul 2004
Posts: 12,812
Tulsa, Oklahoma
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I'm driving a buddy's car 1/4 mile at a time. He is not able to, but gets a kick out of still seeing the car go fast.
So, my reaction times average in the .3 - .4 range [best is way quicker, won't talk about the worst], but the 60' times are around 1.9 - 2.0 range. Am I worrying too much about the techie side of drag racing? BTW, I am ETing 12.50s in a 3,700 lb car with a 4-gear and 4.11 gears. M/T drag radials, not much spin.
Thoughts and input, please.
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1946845
11/07/15 11:58 AM
11/07/15 11:58 AM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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If it's not bogging down, and doesn't have excessive spin, it sounds like your launching dead on. You can probably play with launch rpm, tire pressure and chart results. Pinion snubber, Caltrac's or the like will help. What engine and gear box?
[image][/image]
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Re: Better 60 foot times?
[Re: sgcuda]
#1947022
11/07/15 05:04 PM
11/07/15 05:04 PM
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Joined: Jul 2004
Posts: 12,812 Tulsa, Oklahoma
Wagonmaster
OP
I Live Here
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OP
I Live Here
Joined: Jul 2004
Posts: 12,812
Tulsa, Oklahoma
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I guess my question is will a better 60 foot time really make that much difference? That is my primary curiosity. Back in the day, I don't seem to remember even being concerned about anything but the ET.
I feel the car is doing about as well as it can. My launch technique is a bit erratic, so I can't blame the car for that. The best runs have been on about a 3,750 RPM clutch release, following a good tire heat.
It bogs a bit if I leave with a lower RPM and I have hit the limiter, with spin with a 4K launch. Still dialing it in. I guess I'll have to wait until spring for much more, as this coming week it goes in the shop for a set of fresh PRS CNC heads and a .600/.264 roller cam.
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1947108
11/07/15 08:14 PM
11/07/15 08:14 PM
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Joined: Jan 2003
Posts: 7,495 Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,495
Minnesota
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You should be able to drop at least 2 tenths off of the 60 foot. That will drop the ET at least three or four tenths.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Better 60 foot times?
[Re: 1980volare]
#1947157
11/07/15 09:17 PM
11/07/15 09:17 PM
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Joined: Jul 2005
Posts: 707 California
BigDaddy440
super stock
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super stock
Joined: Jul 2005
Posts: 707
California
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A lot of times a race is won at the 60 ft mark as It does make a huge difference in E.T. As mentioned before a .2 reduction in E.T. can mean .4 on the long end.
1969 A12 Roadrunner 1970 Plymouth Cuda 1968 Dodge Dart
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1947602
11/08/15 05:05 PM
11/08/15 05:05 PM
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Joined: Jan 2003
Posts: 7,495 Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,495
Minnesota
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[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Better 60 foot times?
[Re: dustergirl340]
#1947918
11/09/15 04:23 AM
11/09/15 04:23 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I ain't a drag racer at all but just repeating what my mentor told me decades ago (sounds simple but I am bored/cant sleep!) regarding this which was that 60 ft times are chassis related and ET's are a function of horsepower. I'd look at the chassis/driver reaction
live every 24 hour block of time like it's your last day on earth
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1948169
11/09/15 05:53 PM
11/09/15 05:53 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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"I'd look at the chassis/driver reaction."
Both are seasoned.
I am 60, the car is 37. "seasoned" driver and car makes little difference. That sixty foot is slow for a car with that mph. It seems to have decent power, but is definitely NOT putting it down early. Pick it up two tenths in 60ft and the car will likely be nearly a half second quicker at the same mph
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Re: Better 60 foot times?
[Re: RapidRobert]
#1948170
11/09/15 05:56 PM
11/09/15 05:56 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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I ain't a drag racer at all but just repeating what my mentor told me decades ago (sounds simple but I am bored/cant sleep!) regarding this which was that 60 ft times are chassis related and ET's are a function of horsepower. I'd look at the chassis/driver reaction Sixty foots AND ET is a function of setup and chassis. MPH is a function of HP
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Re: Better 60 foot times?
[Re: Monte_Smith]
#1948184
11/09/15 06:23 PM
11/09/15 06:23 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Posts: 4,457
Washington
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I ain't a drag racer at all but just repeating what my mentor told me decades ago (sounds simple but I am bored/cant sleep!) regarding this which was that 60 ft times are chassis related and ET's are a function of horsepower. I'd look at the chassis/driver reaction Sixty foots AND ET is a function of setup and chassis. MPH is a function of HP Gald you caught that Monte. MPH is HP and ET is chassis. Then you have to figure out if the MPH is up and the ET is slow, or is the hook good and the HP down. I.E. 12.50 @ 155 MPH would suggest the car didn't hook. 12.50 @ 85 MPH would suggest the car hooked but made no HP. OP...what clutch are you using???
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1948194
11/09/15 06:34 PM
11/09/15 06:34 PM
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Joined: Jan 2003
Posts: 13,374 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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A bias ply tire will work better in this application than the drag radial.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Better 60 foot times?
[Re: Monte_Smith]
#1948389
11/09/15 10:35 PM
11/09/15 10:35 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I ain't a drag racer at all but just repeating what my mentor told me decades ago (sounds simple but I am bored/cant sleep!) regarding this which was that 60 ft times are chassis related and ET's are a function of horsepower. I'd look at the chassis/driver reaction Sixty foots AND ET is a function of setup and chassis. MPH is a function of HP Now that you corrected me on this I am remembering that it WAS MPH not ET that is a function of HP that my mentor had stated (it was 32 yrs ago!). thank you for the correction.
live every 24 hour block of time like it's your last day on earth
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Re: Better 60 foot times?
[Re: Wagonmaster]
#1948584
11/10/15 04:25 AM
11/10/15 04:25 AM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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As said above at nausium..... 113 mph says you're making enough power to go into the 11's. Work on the launch and all available chassis modifications to get that thing to transfer weight, then keep hitting the clutch with more RPM, until the tires spin.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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