Dana 44 refurbish and strengthening for drag racing
05-04-2011, 11:13 PM
#42
Race Director
A 5 point is necessary to be NHRA legal. If running 11.49 or faster, a 5 point is required at NHRA tracks. By the way, all my past breakage with the irs have been done at the starting line; Ujoints, halfshafts, outer axles, spider gears, ring and pinions. Never moved more than a few feet, fortunately.
05-04-2011, 11:53 PM
#43
Burning Brakes
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A 5 point is necessary to be NHRA legal. If running 11.49 or faster, a 5 point is required at NHRA tracks. By the way, all my past breakage with the irs have been done at the starting line; Ujoints, halfshafts, outer axles, spider gears, ring and pinions. Never moved more than a few feet, fortunately.
Thanks for the info Will.
05-05-2011, 12:07 AM
#44
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When you guys say break, is it right off the line, or down track? Is it possible to easy off of the line 1.6, or higher 60 foot, and than step into somewhat safely? I have broken 1 outer stub and it was on street tires, but it was 100 foot out. I am guessing the stub was already stressed and finally twisted off.
05-05-2011, 12:21 AM
#45
What also bothers me about the C4 independent rear is the outer stub shaft flange breaking off at high torque loads.
One of the rear wheels will come flying off.
I have seen plenty of stock GM 10-bolt, GM 12-bolt, stock Ford 9 " inch axle shafts fail the same way.
One friend had a 1970-1/2 Z28 Camaro with the factory 12-bolt 8-7/8" rear with 4.10 gears and the heavy duty Eaton Posi.
He performed a high speed burnout.
Then backed up.
Launched his car.
About 500-700 feet later at speed the LR wheel came off.
His car was in the ditch (street racing)
Wheel about 1/2 mile away.
Axle shaft failed right at the flange where it is forged into the axle shaft body ( Raduis).
Bad stuff to happen to anyone.
One of the rear wheels will come flying off.
I have seen plenty of stock GM 10-bolt, GM 12-bolt, stock Ford 9 " inch axle shafts fail the same way.
One friend had a 1970-1/2 Z28 Camaro with the factory 12-bolt 8-7/8" rear with 4.10 gears and the heavy duty Eaton Posi.
He performed a high speed burnout.
Then backed up.
Launched his car.
About 500-700 feet later at speed the LR wheel came off.
His car was in the ditch (street racing)
Wheel about 1/2 mile away.
Axle shaft failed right at the flange where it is forged into the axle shaft body ( Raduis).
Bad stuff to happen to anyone.
05-05-2011, 12:47 AM
#46
Melting Slicks
Usually if you have a stub shaft or spindle as some people call them break, the tire won't leave the car. The rotor and caliper and bearing will hold it in place. But it will take out the hub and bearing and ABS sensor. It will make a mess, but the tire will stay on the car
05-05-2011, 12:59 AM
#47
Usually if you have a stub shaft or spindle as some people call them break, the tire won't leave the car. The rotor and caliper and bearing will hold it in place. But it will take out the hub and bearing and ABS sensor. It will make a mess, but the tire will stay on the car
That 1970-1/2 Z28 had drum brakes on the rear of course.
He beat on that car all through highschool street racing everyone.
And afterwards.
One day that axle shaft did let go on him.
05-05-2011, 06:30 AM
#48
Le Mans Master
Because I don't want to cut the car up to go solid. I almost did it then changed my mind. Going solid you also loose your abs, and traction controll. I do drive the car on the street, it's not a dedicated race car. If it was it would have been back halved years ago.
05-05-2011, 07:28 AM
#49
I can live without ABS.
I had a thought the C4 Dana 44 could survive with up to 800 HP like the Viper Dana 44.
It can with the car sitting still & engine off.
I plan on having around 650HP min.
800 HP max.
normally aspirated.
A small shot of tickle gas & I am over 900 HP.
I can cut my car up, so I can stay alive later.
Don't want a half shaft coming free up through the body tub.
I don't trust the brake caliper to hold the wheel in place likewise when the outer stub shaft breaks too.
05-05-2011, 10:20 AM
#50
Race Director
Usually if you have a stub shaft or spindle as some people call them break, the tire won't leave the car. The rotor and caliper and bearing will hold it in place. But it will take out the hub and bearing and ABS sensor. It will make a mess, but the tire will stay on the car
05-05-2011, 01:53 PM
#51
Drifting
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No problems with IRS after 10 years of bracket racing my 396 six speed. Lite spin of the tires moving forward and 2500 RPM launch. Dial in 11.5 on 1/4, 7.4 1/8. It seems like when you get in the low 11's / high 10's with low 1.6 / 1.5 60' the breakage happens.
It boils down to whether .3 is worth $$$$ and alot of headaches.
It boils down to whether .3 is worth $$$$ and alot of headaches.
05-05-2011, 02:19 PM
#52
Race Director
No problems with IRS after 10 years of bracket racing my 396 six speed. Lite spin of the tires moving forward and 2500 RPM launch. Dial in 11.5 on 1/4, 7.4 1/8. It seems like when you get in the low 11's / high 10's with low 1.6 / 1.5 60' the breakage happens.
It boils down to whether .3 is worth $$$$ and alot of headaches.
It boils down to whether .3 is worth $$$$ and alot of headaches.
05-05-2011, 02:53 PM
#53
Burning Brakes
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No problems with IRS after 10 years of bracket racing my 396 six speed. Lite spin of the tires moving forward and 2500 RPM launch. Dial in 11.5 on 1/4, 7.4 1/8. It seems like when you get in the low 11's / high 10's with low 1.6 / 1.5 60' the breakage happens.
It boils down to whether .3 is worth $$$$ and alot of headaches.
It boils down to whether .3 is worth $$$$ and alot of headaches.
And when you leave the line at 2500rpm, how hard/soft are you releasing the clutch and after you start releasing do you floor it or push into full throttle progressively?
Those are some good times. Thats really what my goal is in the 1/8th. Have you done anything to strengthen you IRS? different bushings, snubber, anything?
-Caleb
05-05-2011, 05:54 PM
#55
Drifting
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What clutch are you running in your car?
And when you leave the line at 2500rpm, how hard/soft are you releasing the clutch and after you start releasing do you floor it or push into full throttle progressively?
Those are some good times. Thats really what my goal is in the 1/8th. Have you done anything to strengthen you IRS? different bushings, snubber, anything?
-Caleb
And when you leave the line at 2500rpm, how hard/soft are you releasing the clutch and after you start releasing do you floor it or push into full throttle progressively?
Those are some good times. Thats really what my goal is in the 1/8th. Have you done anything to strengthen you IRS? different bushings, snubber, anything?
-Caleb
The clutch grabs pretty hard but still can slip it alittle with a fast release. Do not dump the clutch. Floor the throttle. At this RPM, you can bog easily. It takes some seat time to get the right feel. Ranger on the Z06 discussion forum has a good write up on launcing with six speed.
Race against very few manual cars in the Pro Class so there is no room for error. With the Hoosier DR's get consistent 1.68-1.70 60'. Race car weight is 3125.
05-05-2011, 07:04 PM
#56
No problems with IRS after 10 years of bracket racing my 396 six speed. Lite spin of the tires moving forward and 2500 RPM launch. Dial in 11.5 on 1/4, 7.4 1/8. It seems like when you get in the low 11's / high 10's with low 1.6 / 1.5 60' the breakage happens.
It boils down to whether .3 is worth $$$$ and alot of headaches.
It boils down to whether .3 is worth $$$$ and alot of headaches.
I you have 2,000 HP +,
I suppose a 60 foot time of less than 1.3 seconds is irrelevant to some degree.
05-05-2011, 07:11 PM
#57
05-05-2011, 07:17 PM
#58
Safety Car
Or how about this 140 MPH run...
Not bad for a car that isn't even intended to run the 1/4. Just think what it could do set up to drag race...
05-05-2011, 07:26 PM
#59
LOL
Of course that car has power.
Likely North of 900 HP WOT @ 8,500RPM's.
You can be sure there are titanium intake & exhaust valves along with a set of Titanium connecting rods.
