Re: Starting line ratio ???
[Re: 03heavy]
#2530583
08/02/18 06:12 PM
08/02/18 06:12 PM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,478
Kalispell Mt.
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12.49 in my truck with 28" tires and its totally uncontrollable on the street
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Starting line ratio ???
[Re: 03heavy]
#2530660
08/02/18 08:53 PM
08/02/18 08:53 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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From what I’m seeing the most guys using a 3 speed With a aggressive rear axle ratio and a trans brake have trouble With the 60’s Or from what I can tell anyways You use a 904/727 or a glide whitedart I have both a 904 and a Powerglide.. I think the issue is shocks. And Springs.. I believe it was Al that said by the best shock you can afford and I agree 100%.. also have worked with John Calvert with getting the correct leaf spring for my car..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Starting line ratio ???
[Re: 65Fury440]
#2530708
08/02/18 10:49 PM
08/02/18 10:49 PM
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Joined: Mar 2006
Posts: 9,982 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,982
MI, usa
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Shouldn't SLR be somehow equatable to power to weight ratio? Seems like you should be able to get something that would compute to an approximate 60 ft time Except that doesn't take into account A; Tire type/size B; Suspension type C; Shocks D; Weight distribution E; Trans type stick/auto F; Converter/clutch G; Starting line RPM H; trans brake/foot brake It's no secret that just like anything else in racing there are different levels of tuning. The fast guys put as much power to the starting line as possible. That is power x SLR x torque stall ratio. Others run huge tires and less gear for consistency. That being said as power goes up you will reach a limit of how much SLR the track can take. Some guys can go both quick and consistent with SLR that others say won't work. Depends on how hard you want to work at it. Doug
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Re: Starting line ratio ???
[Re: A727Tflite]
#2530794
08/03/18 01:19 AM
08/03/18 01:19 AM
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Joined: Aug 2003
Posts: 43,745 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,745
Bend,OR USA
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Cab, how fast did the car run in 1988?
What cam did you use back then ?
That car ran a best of 11.23 at 119.+ MPH at that race, it had a bunch of string sucked up into the fuel pickup that I was not aware of until after I sold it right after that race. All the other M.W. Mopars running in B/SA at that race where running 122.+ MPH but I contributed that to them having the bigger 1964 carbs, intake and camshaft I had all of them cover by .17 ET, but I was my car was down 3.0 MPH I ran the Firestone 30x9x15 slicks tubeless that where around 96.3 inches in circumference with 16 to 18 lbs. in them on a ten inch rim. The cam was a Lunati legal cheater cam with the lash set at .012 and .014 hot, that car was completely legal I loved that car, I won a bunch of races with it and made a lot of money racing it The good old days
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Starting line ratio ???
[Re: Cab_Burge]
#2530810
08/03/18 02:32 AM
08/03/18 02:32 AM
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Joined: Mar 2011
Posts: 3,178 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,178
Michigan
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Cab, how fast did the car run in 1988?
What cam did you use back then ?
That car ran a best of 11.23 at 119.+ MPH at that race, it had a bunch of string sucked up into the fuel pickup that I was not aware of until after I sold it right after that race. All the other M.W. Mopars running in B/SA at that race where running 122.+ MPH but I contributed that to them having the bigger 1964 carbs, intake and camshaft I had all of them cover by .17 ET, but I was my car was down 3.0 MPH I ran the Firestone 30x9x15 slicks tubeless that where around 96.3 inches in circumference with 16 to 18 lbs. in them on a ten inch rim. The cam was a Lunati legal cheater cam with the lash set at .012 and .014 hot, that car was completely legal I loved that car, I won a bunch of races with it and made a lot of money racing it The good old days Thanks for the reply. Sounds like it was a 63 car.
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Re: Starting line ratio ???
[Re: 03heavy]
#2530815
08/03/18 03:12 AM
08/03/18 03:12 AM
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Joined: Jan 2003
Posts: 4,448 Phoenix, AZ
MoparBilly
master
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master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
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03heavy, For the type of racing you want to do, don't get hung up on killing the 60ft. clocks. I've done a ton of index racing over the years, and getting the car to react the same every time in the first 10 feet is more critical to good reaction times than an impressive 60ft. My car is ladder bar/coil over, so I realize you have more challenges to make it work, and the .4 pro tree is a pain for these types of classes. In addition to driving my car on Drag Week, and spraying it on occasion, I knew I would end up index racing as well, and I love the D Gas 10.60 index .4 tree racing at NHRA Nostalgia races, and I've also done some of the 10.0 stuff at Street Car Takeover.
My 428 small block made 615Hp at 6700, and is over 500 ft.lbs of torque from 4400 to 6200 on the dyno. The top picture on my previous post was the car leaving on the trans brake, with the two step at 4200, NA. My sixties are typically 1.40-1.43 in this configuration, but my best light is .042 in a .4 tree without rolling in a little. The car just has too much front travel right now, and perhaps a little more tire pressure in the rear would help. For reference my best NA ET is 10.39-128. I think the converter is 300rpm too tight, and the 3.89 gear is too tall for max effort. Best on nitrous is 9.43-139. The 8" converter can't really hold the torque, and the 3.89 gear is too short to pull all the way to the stripe! Such is the the plight of a multi-use street car!!
"Livin' in a powder keg and givin' off sparks"
4 Street cars, 5 Race engines
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Re: Starting line ratio ???
[Re: WHITEDART]
#2531039
08/03/18 04:10 PM
08/03/18 04:10 PM
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Joined: Dec 2005
Posts: 12,319 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 12,319
Fulton County, PA
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From what I’m seeing the most guys using a 3 speed With a aggressive rear axle ratio and a trans brake have trouble With the 60’s Or from what I can tell anyways You use a 904/727 or a glide whitedart I have both a 904 and a Powerglide.. I think the issue is shocks. And Springs.. I believe it was Al that said by the best shock you can afford and I agree 100%.. also have worked with John Calvert with getting the correct leaf spring for my car.. Shocks and springs and tuning are critical to getting the best from your combination. But if the combination (i.e. low gear ratio) is out of whack, one way or the other, it becomes difficult or impossible to get the car to run as quick as it's capable of or even control the tire. The suspension and transmission parts - including available gear ratios, tuning, converters and tech, coming out of the very high horsepower Pro Mod and drag radial world, is crazy. All about tire management.
If the results don't match the theory, change the theory.
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Re: Starting line ratio ???
[Re: 03heavy]
#2531199
08/03/18 09:25 PM
08/03/18 09:25 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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At the time those videos were taken I believe I was on a 28.10.5 Tire.. with viking da shocks. Set up with drag radial valving the lowering blocks are made by Calvert they are half inch thick made of steel and designed to be stacked.. if you're going to stack blocks make sure you get the steel ones. When you speak to Calvert you will want to talk about the type of racing you are planning on doing. As well as the weight of the vehicle and right height lower the better ..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Starting line ratio ???
[Re: WHITEDART]
#2531234
08/03/18 10:27 PM
08/03/18 10:27 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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At the time those videos were taken I believe I was on a 28.10.5 Tire.. with viking da shocks. Set up with drag radial valving the lowering blocks are made by Calvert they are half inch thick made of steel and designed to be stacked.. if you're going to stack blocks make sure you get the steel ones. When you speak to Calvert you will want to talk about the type of racing you are planning on doing. As well as the weight of the vehicle and right height lower the better .. What's wrong with the aluminum lowering blocks? I only need 1/2 to maybe 3/4 inch drop so I won't need to stack them. Is aluminum ok if I don't stack them?
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: Starting line ratio ???
[Re: WHITEDART]
#2531274
08/03/18 11:35 PM
08/03/18 11:35 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I have been told it's not the best of ideas Ok thanks. Glad I heard this because I'm just getting ready to order them. I'm buying steel. Thank you
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: Starting line ratio ???
[Re: 03heavy]
#2531430
08/04/18 11:57 AM
08/04/18 11:57 AM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,219
New York
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Aluminum captured between 2 exactly flat, very rigid parallel structures is safe. Otherwise not.
Boffin Emeritus
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