1970 Cuda 4 speed 60 ft problem

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wikd69
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Re: 1970 Cuda 4 speed 60 ft problem

#106 Post by wikd69 » Wed Aug 29, 2012 3:27 pm

raffaplymouth wrote:bad news... i tried traction, it seems worse than before, too much wheelspin ... I do not know more what to do. does not seem to raise the nose ...im sick... It is not possible that after all this still does not connect...and incredible wheel wheel hop !!! .this is the video

http://www.youtube.com/watch?v=nnrxw26v ... ature=plcp
I've never been able to determine much at launch on dry pavement with mine. At speed, sure, but not from launch. The surface is just too uneven and unpredictable. Doing essentially dry burn outs on untreated surfaces like that, mine does the same thing, though with a bit less climb than yours. I think your experience will be way different on the track, after a waterbox smoke session and a launch on a treated surface. Don't get too discouraged :thumb: :smt002

That thing sure sounds good and healthy !

How soon will you have it back on the track ?
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

#107 Post by raffaplymouth » Wed Aug 29, 2012 3:39 pm

wikd69 wrote:
raffaplymouth wrote:bad news... i tried traction, it seems worse than before, too much wheelspin ... I do not know more what to do. does not seem to raise the nose ...im sick... It is not possible that after all this still does not connect...and incredible wheel wheel hop !!! .this is the video

http://www.youtube.com/watch?v=nnrxw26v ... ature=plcp
I've never been able to determine much at launch on dry pavement with mine. At speed, sure, but not from launch. The surface is just too uneven and unpredictable. Doing essentially dry burn outs on untreated surfaces like that, mine does the same thing, though with a bit less climb than yours. I think your experience will be way different on the track, after a waterbox smoke session and a launch on a treated surface. Don't get too discouraged :thumb: :smt002

That thing sure sounds good and healthy !

How soon will you have it back on the track ?
ooo... I was very sad .. with what you're telling me I feel better ...

if I say so means that your car is perfect, on a shitty road like this would do the same ??
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

#108 Post by raffaplymouth » Wed Aug 29, 2012 3:49 pm

Wik , i have the race at end of this week !! sathurday and sunday ,is the best italian track .. but wheater is bad !!.. i hope wheater will be better , no more race for 6 month !! this is Italy .. if you want spaghetti but no drag race ...
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

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sc68z28
Posts: 189
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Location: Riverside California

Re: 1970 Cuda 4 speed 60 ft problem

#109 Post by sc68z28 » Wed Aug 29, 2012 7:30 pm

wikd69 wrote: I've never been able to determine much at launch on dry pavement with mine. At speed, sure, but not from launch. The surface is just too uneven and unpredictable. Doing essentially dry burn outs on untreated surfaces like that, mine does the same thing, though with a bit less climb than yours. I think your experience will be way different on the track, after a waterbox smoke session and a launch on a treated surface. Don't get too discouraged :thumb: :smt002

That thing sure sounds good and healthy !
X2, I agree, mine would just boil the tires on that surface. I gota have a well prept drag strip to leave hard.

Your other ? from earlier....Just my opinion below.
1) front travel from 4 to 5 " = great.

2) front shock calvert 90-10, rear shock at 4 click to soft is ok ??? = If it hops at to track add a click or two.

3) sway bar removed. =Yes

4) all bumper bracket removed. =Yes

5) battery on the trunk. =Yes

6) exhaust removed ( only headers and 15" extension) with EVAC. =Should work well.

7) connecting frame. =Yes, but add a roll bar or cage later for safety and more strength.

8) pinion angle to 2 degree nose up at 2 degree nose down). = On a leaf spring car I have been told 4 degrees or more, maybe less with CalTracs but I don't know for sure. Important that you are measuring rear end is nose down in relation to the crankshaft/transmission main shaft. NOT the DRIVESHAFT!
See diagram here http://www.markwilliams.com/driveshafttech.aspx

9) caltracs at zero preload ( i dont understand if is better at zero or 1/2 preload i dont see change ) = A half turn would help control wheel hop and help with pinion angle change under load. I think with preload of a 1/2 turn you would be able to run less pinion angle.

10) tires screw installed with tube , Tire pressure 11 psi =Or start at 12+ and work down. hopefully you will have time to test and tune the things that you can adjust like shocks, tire psi, launch rpm and so on.
IMPORTANT...With a clutch car you actually need just a little wheel speed (spin) appox 2 to 3 or more turns then hook.
If it dead hooks, somethings got to give. One of 3 things will happen, 1) broken parts all over track 2) engine bogs down 3) clutch slips. I allways say the cheapest thing to break is traction.

11) car weight from 3650 to 3490 =Great reduction!

with all this work, as it will be my 60 ft?? = I'm happy if it improves any, atleast I'm know I going the right direction.

for you rpm launch is ok at 4500 or is too ??? = Start low and work up, 3500 and see what happens. Remember don't break it on the 1st pass cause you want to prove something.

Can I have spaghetti too! :lol:

---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

#110 Post by wikd69 » Wed Aug 29, 2012 10:45 pm

raffaplymouth wrote:
ooo... I was very sad .. with what you're telling me I feel better ...

if I say so means that your car is perfect, on a shitty road like this would do the same ??
Oh yeah, mine will sometimes bounce and scrub too, just not a lot because of the ladder bar set up. I think you'll have a completely different result on the track. If you're making more low end torque now it might tend to exaggerate the wheel hop behaviour on dry pavement as well.
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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wikd69
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Re: 1970 Cuda 4 speed 60 ft problem

#111 Post by wikd69 » Wed Aug 29, 2012 10:47 pm

raffaplymouth wrote:Wik , i have the race at end of this week !! sathurday and sunday ,is the best italian track .. but wheater is bad !!.. i hope wheater will be better , no more race for 6 month !! this is Italy .. if you want spaghetti but no drag race ...
Mmmmmmm..... PAAAAAASTA !!!!!!!!!!!!!!
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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wikd69
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Joined: Sat Feb 23, 2008 12:42 pm
Location: Rocklin, CA
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Re: 1970 Cuda 4 speed 60 ft problem

#112 Post by wikd69 » Wed Aug 29, 2012 11:16 pm

sc68z28 wrote:
10) ...IMPORTANT...With a clutch car you actually need just a little wheel speed (spin) appox 2 to 3 or more turns then hook.
If it dead hooks, somethings got to give. One of 3 things will happen, 1) broken parts all over track 2) engine bogs down 3) clutch slips. I allways say the cheapest thing to break is traction.

---Bill.
*Some* of us just hold the transbrake button down and mash the throttle all the way open when all the pretty yellow lights show up on the tree... :roll: :mrgreen:

Of course, some of us don't turn 9.10's either. Never mind. :smt003

Raf, speaking of broken parts, ask Bill to share the photo where he twisted the pinion shaft in two... That booger makes some big horsepower. Awesome pix.
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

#113 Post by sc68z28 » Thu Aug 30, 2012 12:35 am

wikd69 wrote: *Some* of us just hold the transbrake button down and mash the throttle all the way open when all the pretty yellow lights show up on the tree... :roll: :mrgreen:

Of course, some of us don't turn 9.10's either. Never mind. :smt003

Raf, speaking of broken parts, ask Bill to share the photo where he twisted the pinion shaft in two... That booger makes some big horsepower. Awesome pix.
Harry, your a funny guy, what's a trans brake button do? :attack:
I have heard about those convertor thingys, someone once told me they are used to turn AFT into foam :nutkick:
I guess I should take some of your words as a complement, THANKS is all in fun.

Here's your pic. Dead hooked with no preload on the Slide-a-Links.

Image

---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

#114 Post by raffaplymouth » Thu Aug 30, 2012 12:44 am

Bill !! with this pinion look like you have good traction !!!!!!!! please expleane this ! i dont understand :

IMPORTANT...With a clutch car you actually need just a little wheel speed (spin) appox 2 to 3 or more turns then hook.
If it dead hooks, somethings got to give. One of 3 things will happen, 1) broken parts all over track 2) engine bogs down 3) clutch slips. I allways say the cheapest thing to break is traction.
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

#115 Post by raffaplymouth » Thu Aug 30, 2012 12:56 am

sc68z28 wrote:
wikd69 wrote: I've never been able to determine much at launch on dry pavement with mine. At speed, sure, but not from launch. The surface is just too uneven and unpredictable. Doing essentially dry burn outs on untreated surfaces like that, mine does the same thing, though with a bit less climb than yours. I think your experience will be way different on the track, after a waterbox smoke session and a launch on a treated surface. Don't get too discouraged :thumb: :smt002

That thing sure sounds good and healthy !
X2, I agree, mine would just boil the tires on that surface. I gota have a well prept drag strip to leave hard.

Your other ? from earlier....Just my opinion below.
1) front travel from 4 to 5 " = great.

2) front shock calvert 90-10, rear shock at 4 click to soft is ok ??? = If it hops at to track add a click or two.

3) sway bar removed. =Yes

4) all bumper bracket removed. =Yes

5) battery on the trunk. =Yes

6) exhaust removed ( only headers and 15" extension) with EVAC. =Should work well.

7) connecting frame. =Yes, but add a roll bar or cage later for safety and more strength.

8) pinion angle to 2 degree nose up at 2 degree nose down). = On a leaf spring car I have been told 4 degrees or more, maybe less with CalTracs but I don't know for sure. Important that you are measuring rear end is nose down in relation to the crankshaft/transmission main shaft. NOT the DRIVESHAFT!
See diagram here http://www.markwilliams.com/driveshafttech.aspx

9) caltracs at zero preload ( i dont understand if is better at zero or 1/2 preload i dont see change ) = A half turn would help control wheel hop and help with pinion angle change under load. I think with preload of a 1/2 turn you would be able to run less pinion angle.

10) tires screw installed with tube , Tire pressure 11 psi =Or start at 12+ and work down. hopefully you will have time to test and tune the things that you can adjust like shocks, tire psi, launch rpm and so on.
IMPORTANT...With a clutch car you actually need just a little wheel speed (spin) appox 2 to 3 or more turns then hook.
If it dead hooks, somethings got to give. One of 3 things will happen, 1) broken parts all over track 2) engine bogs down 3) clutch slips. I allways say the cheapest thing to break is traction.

11) car weight from 3650 to 3490 =Great reduction!

with all this work, as it will be my 60 ft?? = I'm happy if it improves any, atleast I'm know I going the right direction.

for you rpm launch is ok at 4500 or is too ??? = Start low and work up, 3500 and see what happens. Remember don't break it on the 1st pass cause you want to prove something.

Can I have spaghetti too! :lol:

---Bill.
thank Bill !! i will recheck the pinion angle !! sorry i dont understand 2-3 turn then hook ??? i dont understand
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

#116 Post by raffaplymouth » Thu Aug 30, 2012 1:02 am

sorry Wik , i dont understand this :

Some* of us just hold the transbrake button down and mash the throttle all the way open when all the pretty yellow lights show up on the tree...

i have line lock with swich , no trans brake , i can add a switch on the clutch pedal ??
1970 Super Cuda 496 Indyheads
ET 9.32@148 1.42 60ft (250 shot ) :shock:

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wikd69
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Re: 1970 Cuda 4 speed 60 ft problem

#117 Post by wikd69 » Thu Aug 30, 2012 1:41 am

[quote="raffaplymouth"]sorry Wik , i dont understand this :

Some* of us just hold the transbrake button down and mash the throttle all the way open when all the pretty yellow lights show up on the tree...

Sorry, sometimes my sublte humor doesn't translate well lol...

I was poking fun at Bill - with a torque converter, transbrake & automatic I can launch at just about any RPM, but I don't run as fast as Bill.
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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Bruce69Camaro
Posts: 1779
Joined: Thu Jul 23, 2009 11:07 am
Location: PA

Re: 1970 Cuda 4 speed 60 ft problem

#118 Post by Bruce69Camaro » Thu Aug 30, 2012 7:30 am

Hey Raffa,

How you been?

Did you enjoy the USA?

Instead of spaghetti, can I have a ham and cheese calzone?
Those who think they know it all have no way of finding out they don't......... :scratch:

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

Re: 1970 Cuda 4 speed 60 ft problem

#119 Post by raffaplymouth » Thu Aug 30, 2012 8:01 am

Bruce69Camaro wrote:Hey Raffa,

How you been?

Did you enjoy the USA?

Instead of spaghetti, can I have a ham and cheese calzone?
Bruce , yes everything ok ..... i make a long trip on west coast !! very nice ..... good food !! NEW YORK STEAK , RIBS !! , DAVE'S BBQ !! FRENCH FRIES , BAKED POTATO !! BROWN COOKIE !! VERY GOOD AMERICAN FOOD !! I LIKE

I DONT LIKE ITALIAN FOOD IN VACATIONS !!
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

#120 Post by raffaplymouth » Thu Aug 30, 2012 8:06 am

GUYS , LOOK THIS !! I REMEMBER NOW THAT I HAVE ADDED A LEAF ON MY SPRINGS 4-5 YEARS AGO FOR LIFT THE REAR .. THIS CAN CAUSE PROBLEM ??? OR NO ?? YOU CAN SEE IN THE PICTURES THE LEAF WITH ARROW IS ADDED , LET ME KNOW
Image

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

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