Re: Bigish cam, big motor- BIG redline?
[Re: lewtot184]
#2985881
11/16/21 07:34 PM
11/16/21 07:34 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,539
So. Burlington, Vt.
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284@.050 is a big-“ish” cam?
I would have though that easily qualified as a straight up “big” cam.
Especially with 10.5:1CR.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Bigish cam, big motor- BIG redline?
[Re: AndyF]
#2985887
11/16/21 08:05 PM
11/16/21 08:05 PM
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Joined: Jul 2011
Posts: 782 wine country
8urvette
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 782
wine country
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It might shift once before it blows apart. A friend of mine had a ranchero years ago with an Blown alcohol injected hemi and a (a833) 4 speed. It was deep in the 8s. The trans held up as long as he didnt power shift or dump the clutch off the line. He routinely would run mid 9's taking it "easy". He also drove this on the street. But a hard launch would strip the main shaft IIRC.
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Re: Bigish cam, big motor- BIG redline?
[Re: 8urvette]
#2985948
11/16/21 11:27 PM
11/16/21 11:27 PM
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Joined: Aug 2003
Posts: 43,744 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,744
Bend,OR USA
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Right now I cannot shift (1/2) above 5k, it just wont go into gear. Has no problem doing the 2/3 shift and I haven't tried the 3/4 at any real rpms.
Sounds like you have street clutch disc with the wave spring in between the two discs that expands the higher you rev it If that is the case swap it out for a race disc that is designed and built to be rev above 5000 RPM and still shift Been there, done that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Bigish cam, big motor- BIG redline?
[Re: Cab_Burge]
#2985958
11/16/21 11:40 PM
11/16/21 11:40 PM
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Joined: May 2019
Posts: 722 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 722
Lake Villa Il
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Hmm, never heard of a marcel spring dragging a clutch at high rpm.
I have seen some aluminum flywheels flex enough at high rpm to engage the clutch. Would not have thought that possible until swapping a few cars back to steel which cured it.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Bigish cam, big motor- BIG redline?
[Re: Cab_Burge]
#2985964
11/17/21 12:20 AM
11/17/21 12:20 AM
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Joined: Jul 2011
Posts: 782 wine country
8urvette
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 782
wine country
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Right now I cannot shift (1/2) above 5k, it just wont go into gear. Has no problem doing the 2/3 shift and I haven't tried the 3/4 at any real rpms.
Sounds like you have street clutch disc with the wave spring in between the two discs that expands the higher you rev it If that is the case swap it out for a race disc that is designed and built to be rev above 5000 RPM and still shift Been there, done that I am not even sure what brand it truly is. I bought it from american powertrain years ago before they sold centerforce. I feel like at the time they called it "science friction" Maybe Ill give them a call, but in the past, ordering other parts for my swap I was not too impressed with their knowledge of their own products or customer service. This is the only picture I have of it.
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Re: Bigish cam, big motor- BIG redline?
[Re: 8urvette]
#2986025
11/17/21 11:06 AM
11/17/21 11:06 AM
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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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Right now I cannot shift (1/2) above 5k, it just wont go into gear. Has no problem doing the 2/3 shift and I haven't tried the 3/4 at any real rpms.
Sounds like you have street clutch disc with the wave spring in between the two discs that expands the higher you rev it If that is the case swap it out for a race disc that is designed and built to be rev above 5000 RPM and still shift Been there, done that I am not even sure what brand it truly is. I bought it from american powertrain years ago before they sold centerforce. I feel like at the time they called it "science friction" Maybe Ill give them a call, but in the past, ordering other parts for my swap I was not too impressed with their knowledge of their own products or customer service. This is the only picture I have of it. That clutch is a parts breaker. Marketing nonsense must sell clutches because I have never used a clutch based on how much horsepower a bean counter thinks it will hold.
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: Bigish cam, big motor- BIG redline?
[Re: madscientist]
#2986047
11/17/21 11:52 AM
11/17/21 11:52 AM
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Joined: Jul 2011
Posts: 782 wine country
8urvette
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 782
wine country
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Right now I cannot shift (1/2) above 5k, it just wont go into gear. Has no problem doing the 2/3 shift and I haven't tried the 3/4 at any real rpms.
Sounds like you have street clutch disc with the wave spring in between the two discs that expands the higher you rev it If that is the case swap it out for a race disc that is designed and built to be rev above 5000 RPM and still shift Been there, done that I am not even sure what brand it truly is. I bought it from american powertrain years ago before they sold centerforce. I feel like at the time they called it "science friction" Maybe Ill give them a call, but in the past, ordering other parts for my swap I was not too impressed with their knowledge of their own products or customer service. This is the only picture I have of it. That clutch is a parts breaker. Marketing nonsense must sell clutches because I have never used a clutch based on how much horsepower a bean counter thinks it will hold. Care to elaborate? Or just an opinion based on gut feeling???
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Re: Bigish cam, big motor- BIG redline?
[Re: 8urvette]
#2986058
11/17/21 12:23 PM
11/17/21 12:23 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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Look into soft lock clutches. What you have is a 2 ton toggle switch that beats everything behind it to death. You need to control the application of the clutch or it will break parts. And yes, you can use a soft lock on the street.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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