1970 Cuda 4 speed 60 ft problem

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#121 Post by sc68z28 » Thu Aug 30, 2012 1:00 pm

raffaplymouth wrote: sorry i dont understand 2-3 turn then hook ??? i dont understand
To much traction =( "Dead Hook" ) is a bad thing with a clutch car.
You will need some tire spin = ( "Wheel Speed" ) to get the car moving.


Your car had to much wheel speed at your last track test.
As you make changes things will improve. What we do NOT want is to much traction = broken parts.

This vid shows slo-mo wheel speed at launch...All these car leave with a clutch.
http://www.youtube.com/watch?v=HldiiDmvTxI
Did you see the tires spin just a little, 2-3 turns/revolutions, then start to grab/hook the track.
All these Pro racers also have an adjustable clutch so that as the tires hook up with the track the clutch will slip while the engine rpm is tring to match the transmission/driveshaft rpm.

Since you do not have an adjustable clutch (yet) you may need to spin the tires just a little longer.

An automatic car can dead hook because the torque conveter allows the slip needed the get the car moving.

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#122 Post by raffaplymouth » Thu Aug 30, 2012 1:06 pm

sc68z28 wrote:
raffaplymouth wrote: sorry i dont understand 2-3 turn then hook ??? i dont understand
To much traction =( "Dead Hook" ) is a bad thing with a clutch car.
You will need some tire spin = ( "Wheel Speed" ) to get the car moving.


Your car had to much wheel speed at your last track test.
As you make changes things will improve. What we do NOT want is to much traction = broken parts.

This vid shows slo-mo wheel speed at launch...All these car leave with a clutch.
http://www.youtube.com/watch?v=HldiiDmvTxI
Did you see the tires spin just a little, 2-3 turns/revolutions, then start to grab/hook the track.
All these Pro racers also have an adjustable clutch so that as the tires hook up with the track the clutch will slip while the engine rpm is tring to match the transmission/driveshaft rpm.

Since you do not have an adjustable clutch (yet) you may need to spin the tires just a little longer.

An automatic car can dead hook because the torque conveter allows the slip needed the get the car moving.

---Bill.
so ..in my case there is no dangerous .. I have a bad traction ... Bill you see the pictures of leaf added ??? i removing ???
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#123 Post by sc68z28 » Thu Aug 30, 2012 1:16 pm

raffaplymouth wrote: I have a bad traction ... Bill you see the pictures of leaf added ??? i removing ???
You do not really know if you still have "bad traction" untill you go back to the track. The changes you have allready done may have fixed some of that wheel speed/traction.

The track, if well prepared (sticky) is the true test. Street driving will not tell you much.

I would keep the leaf. It is probably helping, it's not a problem in my opinion.

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#124 Post by raffaplymouth » Thu Aug 30, 2012 2:25 pm

sc68z28 wrote:
raffaplymouth wrote: I have a bad traction ... Bill you see the pictures of leaf added ??? i removing ???
You do not really know if you still have "bad traction" untill you go back to the track. The changes you have allready done may have fixed some of that wheel speed/traction.

The track, if well prepared (sticky) is the true test. Street driving will not tell you much.

I would keep the leaf. It is probably helping, it's not a problem in my opinion.

---Bill.
you're right Bill , and I am very pessimistic, this car has never done a good 60ft, and when I increased the power of the engine, seems to be worse....until i will put 'on track we can not know...saw a lot of cars less powerful than mine, raise the wheels off the ground ... mina have almost 1000 HP has never even raised the wheel left, your opinion, whether to improve traction can lift the front wheels on my 3500 lb Cuda ?
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#125 Post by raffaplymouth » Thu Aug 30, 2012 2:37 pm

Guys , you can see inside ...a lot of wheelspin in my last race 3 month ago before this last modify

https://www.youtube.com/watch?v=IrfR9ODpHOE
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#126 Post by raffaplymouth » Thu Aug 30, 2012 2:46 pm

1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#127 Post by sc68z28 » Thu Aug 30, 2012 6:49 pm

raffaplymouth wrote: ...until i will put 'on track we can not know...saw a lot of cars less powerful than mine, raise the wheels off the ground ... mina have almost 1000 HP has never even raised the wheel left, your opinion, whether to improve traction can lift the front wheels on my 3500 lb Cuda ?
Do NOT use any N2o untill you have improved your 60'

I'd recommend that you take out some ignition timing (less power) untill you can get the car to leave with out burning up the tires.
In your case I bet a spagetti dinner less is better! Less power = better ET.

And yes cars with less power get hooked up faster, that just makes sense.

Yes your car will do wheel stands.

Untill then, we don't want this to happen... http://www.youtube.com/watch?v=kkB2rMIfXW0

Just few months, a RF fender, and some other work it did this... http://www.youtube.com/watch?v=tC_p-VUa ... ure=relmfu

So you can see I went from spinning and crashing to up on the bumper pretty easy!

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

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wikd69
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Location: Rocklin, CA
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Re: 1970 Cuda 4 speed 60 ft problem

#128 Post by wikd69 » Thu Aug 30, 2012 7:40 pm

sc68z28 wrote:
raffaplymouth wrote: ...until i will put 'on track we can not know...saw a lot of cars less powerful than mine, raise the wheels off the ground ... mina have almost 1000 HP has never even raised the wheel left, your opinion, whether to improve traction can lift the front wheels on my 3500 lb Cuda ?
Do NOT use any N2o untill you have improved your 60'

I'd recommend that you take out some ignition timing (less power) untill you can get the car to leave with out burning up the tires.
In your case I bet a spagetti dinner less is better! Less power = better ET.

And yes cars with less power get hooked up faster, that just makes sense.

Yes your car will do wheel stands.

Untill then, we don't want this to happen... http://www.youtube.com/watch?v=kkB2rMIfXW0

Just few months, a RF fender, and some other work it did this... http://www.youtube.com/watch?v=tC_p-VUa ... ure=relmfu

So you can see I went from spinning and crashing to up on the bumper pretty easy!

---Bill.
Raf - wanted to be sure to point out that it's perfectly acceptable to skip over that whole run-into-the-wall thing. Bill just did that to wake people up. You can go straight to the up-on-the-bumper thing.

I'm just saying...
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

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sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#129 Post by sc68z28 » Thu Aug 30, 2012 7:59 pm

wikd69 wrote: Raf - wanted to be sure to point out that it's perfectly acceptable to skip over that whole run-into-the-wall thing. Bill just did that to wake people up. You can go straight to the up-on-the-bumper thing.

I'm just saying...
Ya Harry, best to skip that step in the learning curve.

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

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wikd69
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Re: 1970 Cuda 4 speed 60 ft problem

#130 Post by wikd69 » Thu Aug 30, 2012 9:54 pm

sc68z28 wrote:
wikd69 wrote: Raf - wanted to be sure to point out that it's perfectly acceptable to skip over that whole run-into-the-wall thing. Bill just did that to wake people up. You can go straight to the up-on-the-bumper thing.

I'm just saying...
Ya Harry, best to skip that step in the learning curve.

---Bill.
You know me, always wanting to help :smt003
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#131 Post by raffaplymouth » Fri Aug 31, 2012 1:49 pm

Wheater is not good , but not rain .. im ready to go ! , i little lowered the front for increase the travel from 4.5 to 5 inches , i also decide to run with 3/4 tank level , for you is good ?? more weight on the rear

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1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

User avatar
sc68z28
Posts: 189
Joined: Sun Jan 15, 2006 8:28 pm
Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#132 Post by sc68z28 » Fri Aug 31, 2012 4:29 pm

Get lots of VID and pictures.

Good luck and...
...Don't break it :thumb:

---Bill.
68 Camaro, 380ci, Procharger, G-force 5 speed, EFI, 7" 2 disc clutch, best ET 8.69 @159
Best 60' vid http://www.youtube.com/watch?v=1OLzx5jBo4w

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wikd69
Posts: 2068
Joined: Sat Feb 23, 2008 12:42 pm
Location: Rocklin, CA
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Re: 1970 Cuda 4 speed 60 ft problem

#133 Post by wikd69 » Fri Aug 31, 2012 6:56 pm

Yeah, what Bill said !!!! :smt002

Remember, try to get some good low angle HD videos from the rear quarter view for both your burn out and your launch. You can tell a lot about how the suspension is behaving, how your hook is and what the weight transfer is like from the right video clip.

Good luck, have fun and make us proud :thumb: :smt003
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

raffaplymouth
Posts: 162
Joined: Tue Jul 24, 2012 2:07 pm

Re: 1970 Cuda 4 speed 60 ft problem

#134 Post by raffaplymouth » Sat Sep 01, 2012 3:47 pm

Guys !!! First pass 11.10@129 !!!!! 1.70ft !! Without nitrous !!
Tomorrow with nitrous !! I will let you know !!thank you for your help !!
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

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wikd69
Posts: 2068
Joined: Sat Feb 23, 2008 12:42 pm
Location: Rocklin, CA
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Re: 1970 Cuda 4 speed 60 ft problem

#135 Post by wikd69 » Sat Sep 01, 2012 5:28 pm

raffaplymouth wrote:Guys !!! First pass 11.10@129 !!!!! 1.70ft !! Without nitrous !!
Tomorrow with nitrous !! I will let you know !!thank you for your help !!

Zoom Zoom !!!! :thumb:

Congrats on the improvement - let us know how it goes tomorrow :smt003
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

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