measuring for a new drive shaft



measuring for a new drive shaft

Postby grumpyvette » October 13th, 2008, 10:57 am

http://www.dennysdriveshaft.com/how_to_measure.html

http://www.arizonadrivelines.com/how_to ... _shaft.htm

http://www.arizonadrivelines.com/how_to ... _shaft.htm

http://www.actionmachineinc.com/onepiec ... guide.aspx

http://www.dennysdriveshaft.com/p461_3r_series_u

http://www.dennysdriveshaft.com/c130_un ... oints.html

http://www.dennysdriveshaft.com/p766_st ... shaft.html

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be aware there are different spline counts, and adapter u-joints so talk to the guys fabricating your new drive shaft and give them all the info they need.
your car might require new yokes and u-joints, made from far stronger steel alloys, so ask if theres upgrades or larger sizes available, theres no sense having a drive shaft custom built and balanced that might need to be replaced or upgraded, get the cost of the original to cover the process, so you don,t need to do it twice
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: measuring for a new drive shaft

Postby grumpyvette » October 5th, 2014, 1:25 pm

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: measuring for a new drive shaft

Postby Indycars » October 5th, 2014, 4:06 pm


When they say "Stiffness", are they talking about bending in compression or a
torsional stiffness? I'm guessing it's torsional.

When I used the Wallace Racing calculator and change only the length 13 inches
and diameter of 2.75, then I get a critical speed of 117,745 RPM. Looks like I
have nothing to work about in the TBucket.

http://www.wallaceracing.com/driveshaftspeed.htm

https://en.wikipedia.org/wiki/Critical_speed

Rick
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- Check Out My Dart SHP Engine Project: viewtopic.php?f=69&t=3814
- Need a Dynamic Compression Ratio Calculator: viewtopic.php?f=99&t=4458
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Re: measuring for a new drive shaft

Postby grumpyvette » October 5th, 2014, 4:16 pm

I looked at that post , read it, and my first reaction was
" why would anyone have a drive shaft made thats less than 3" in diameter"
I,m not saying it won,t work just fine, in your application, I guess its just , a semi subconscious reaction after decades , or years of ordering custom built 3" and 3.5" chrome moly drive shafts drive shafts, because Ive seen the smaller diameter ones, and many aluminum one twisted like pretzels!
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Ive generally ordered 3.5" chrome moly drive shafts on serious big block cars with dana differentials with the matching larger u-joints & chrome moly yokes
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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Re: measuring for a new drive shaft

Postby Indycars » October 5th, 2014, 5:01 pm


You have to remember when the car was first built in 1980, I was going to college
and I used what was available and free. Until the recent engine, it had a stock 350
with a very mild camshaft upgrade only. I had the driveshaft u-joints replaced and
had it balanced way before I was on track to building a nearly $7000 engine with way more HP.

The driveshaft has two diameters, but I used the smaller for the calculation above.
Actually about 1/3 of the driveshaft is 3 inches and the other 2/3 is 2.75 inches.

Which begs the question ..... does it matter which end is facing the transmission?

FP15_DriveshaftDiameters_4598.jpg


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Rick
Too much is just enough!!!

- Check Out My Dart SHP Engine Project: viewtopic.php?f=69&t=3814
- Need a Dynamic Compression Ratio Calculator: viewtopic.php?f=99&t=4458
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