Stick shift guys
#3130143
03/17/23 02:07 PM
03/17/23 02:07 PM
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Joined: Oct 2003
Posts: 4,013 South Park, Pa.
68LAR
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What is the cut off for weight to determine wither to use an aluminum of a steel flywheel? My car with me in it and a half tank of gas weighs in at 3926#. I have run both types of flywheels. The difference in ET and MPH with my set up is minimal. My car is mostly street driven. Street manners with the steel wheel seems better. The aluminum wheel weighs in at around 20# . The steel wheels is around 33#'s.
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: Stick shift guys
[Re: 68LAR]
#3130155
03/17/23 02:37 PM
03/17/23 02:37 PM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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I think it is up to you on which one you like, especially on a street and strip car I did a bunch of testing on flywheel diameter, clutches and pressure plates on my old 1970 Cuda Hemi 4 speed car, started off with with the stock 1968 170 tooth flywheel with the 11.0 inch clutch( I think weighed 40 lbs. switch to a 140 tooth flywheel with the 11.0 inch clucth which weighed a little less but I can't remember exactly how much now Next was a 130 tooth steel with a 10.95 clutch Borg and Beck style and later tried a Long Style 10.95 clutch, the last swap was to a 18 to 20 lbs. 130 tooth Aluminum flywheel with one of the 10.95 clutches. The car would spin the tires with all the steel flywheels and bog with the aluminum leaving at WOT on all of them I fnally weigh the front and rear axle weigts and quit racing it after that, it had 2180 lbs. on the front tires and 1260 lbs. on the rear tires without me in it racing on a 9 inch wide slick : down:
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Stick shift guys
[Re: Cab_Burge]
#3130199
03/17/23 06:05 PM
03/17/23 06:05 PM
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Joined: Jan 2003
Posts: 10,039 MN
JERICOGTX
I Live Here
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I Live Here
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MN
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Sounds like you need to listen to Cale Aronson the the Clutch Burners podcast. https://youtu.be/oLgQMFNkKCELots of good info concerning clutch and flywheel weight.
69 GTX
68 Road Runner
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Re: Stick shift guys
[Re: 68LAR]
#3130201
03/17/23 06:26 PM
03/17/23 06:26 PM
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Joined: May 2019
Posts: 713 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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I think not just race weight but SLR would be a consideration.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Stick shift guys
[Re: JERICOGTX]
#3130226
03/17/23 09:00 PM
03/17/23 09:00 PM
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Joined: Oct 2003
Posts: 4,013 South Park, Pa.
68LAR
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OP
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South Park, Pa.
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Sounds like you need to listen to Cale Aronson the the Clutch Burners podcast. https://youtu.be/oLgQMFNkKCELots of good info concerning clutch and flywheel weight. . Good info here. Thanks. Probably leave the steel wheel in.
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: Stick shift guys
[Re: 68LAR]
#3130426
03/18/23 08:46 PM
03/18/23 08:46 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
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Rittman Ohio
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I was discussing flywheels with a few of the UMTR guys about aluminum flywheels and one of the opinions had my interest. The idea was that even though the inertia is greater with a steel wheel the aluminum wheel recovers RPM quicker between gear changes. I have a new aluminum wheel that I intend to use if I put the old Hays Mark XII plate back in because that 12 bolt adjustable plate is freakin heavy. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Stick shift guys
[Re: fourgearsavoy]
#3130433
03/18/23 09:02 PM
03/18/23 09:02 PM
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Joined: Oct 2003
Posts: 4,013 South Park, Pa.
68LAR
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Joined: Oct 2003
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I was discussing flywheels with a few of the UMTR guys about aluminum flywheels and one of the opinions had my interest. The idea was that even though the inertia is greater with a steel wheel the aluminum wheel recovers RPM quicker between gear changes. I have a new aluminum wheel that I intend to use if I put the old Hays Mark XII plate back in because that 12 bolt adjustable plate is freakin heavy. Gus Interesting. Steel gets you moving better, but aluminum recovers between shifts better
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: Stick shift guys
[Re: 68LAR]
#3130441
03/18/23 10:04 PM
03/18/23 10:04 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Washington
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I was discussing flywheels with a few of the UMTR guys about aluminum flywheels and one of the opinions had my interest. The idea was that even though the inertia is greater with a steel wheel the aluminum wheel recovers RPM quicker between gear changes. I have a new aluminum wheel that I intend to use if I put the old Hays Mark XII plate back in because that 12 bolt adjustable plate is freakin heavy. Gus Interesting. Steel gets you moving better, but aluminum recovers between shifts better Not always. There are ways to make the lighter flywheel combo get you going like a steel wheel. I don’t argue about it any more because it’s not worth it. I run an aluminum wheel in everything that is going to see some track time. Of course, if you don’t have a way to APPLY the clutch then the steel wheel is a bandaid to get the car moving. Clutch application is critical.
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: Stick shift guys
[Re: madscientist]
#3130445
03/18/23 10:31 PM
03/18/23 10:31 PM
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Joined: Jan 2003
Posts: 75,070 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
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I was discussing flywheels with a few of the UMTR guys about aluminum flywheels and one of the opinions had my interest. The idea was that even though the inertia is greater with a steel wheel the aluminum wheel recovers RPM quicker between gear changes. I have a new aluminum wheel that I intend to use if I put the old Hays Mark XII plate back in because that 12 bolt adjustable plate is freakin heavy. Gus Interesting. Steel gets you moving better, but aluminum recovers between shifts better Not always. There are ways to make the lighter flywheel combo get you going like a steel wheel. I don’t argue about it any more because it’s not worth it. I run an aluminum wheel in everything that is going to see some track time. Of course, if you don’t have a way to APPLY the clutch then the steel wheel is a bandaid to get the car moving. Clutch application is critical. Can you point us to the thread where you did agrue it ?
running up my post count some more .
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Re: Stick shift guys
[Re: JohnRR]
#3130458
03/18/23 11:25 PM
03/18/23 11:25 PM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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I've help other stick shift racers. years ago, using a early A body 3.09 first gear tranny in a later A body case, taught us that the starting line ratio and. 3rd to 4 th. gear RPM drop can make a lot of difference in a drag only car, especially SB cars 5.57 rear gear with a 3.09 1st gear in a 3000 lb. SB stick shift drag car keeps you pretty busy ( ) the first 300 to 500 ft. depending on the rear tire size
Last edited by Cab_Burge; 03/18/23 11:25 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Stick shift guys
[Re: weedburner]
#3130616
03/19/23 05:19 PM
03/19/23 05:19 PM
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Joined: Oct 2003
Posts: 4,013 South Park, Pa.
68LAR
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OP
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Joined: Oct 2003
Posts: 4,013
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The part about launch rpm vs trap rpm is very interesting. I may reconsider my aluminum wheel.
4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
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Re: Stick shift guys
[Re: 68LAR]
#3130665
03/19/23 08:41 PM
03/19/23 08:41 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
Joined: Sep 2014
Posts: 4,457
Washington
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The part about launch rpm vs trap rpm is very interesting. I may reconsider my aluminum wheel. Yup. At least reconsider it.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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