what might be a realistic zero to 60 guesstimate

[Jimbocobra]

Originally Posted by Excaliber

Depending on the final drive ratio (rear gear X 1st gear ratio= Y) I think under 4 is possible with a small block? The BMW half shafts are apparently weaker than other typical IRS units found in Cobras, as far as torque rating is concerned. Jag, Ford, Kirkham/Shelby style, etc. are stronger units.

"apparently weaker", the scientific, classic engineering response...

I have hit 3.6, 3.7 and 3.8 0-60 times with the older style BDR half-shaft with no problem. Also, I have made over 20 hard trips down the 1/4 mile with sticky drag radials and had no issues with the half shaft. Yes, sub 4's are possible with a small block, easily and repeatedly. My car was build in 2006 and I'm still on the orginal half shaft. I was worried when I read everyones opinions, but opinions, like the one above are no match for real world testing. BDR makes a fine product, cabable of handling tremendous abuse.

[D111]

Jimbocobra

Are you running the standard rear?

So you mean to tell me that there is a chance that my car stands a chance of not getting spanked against my friends new ZR 1, that he just paid $115,000 for.

Dennis

[Jimbocobra]

Against the ZR1 in a 0-60, yes - you have a good chance. The 1/4 mile is another story, it eventually becomes a hp race and the ZR1 is tough to beat unless you have some big power, they are running 10.9's on drag radials. My car is a run of the mill 392 stroker with GT40 heads. You can only get so much power to the ground and 450hp is plenty to get 3.5 seconds to 60, I'll need to spend some money on new heads and nitrous to get into the 10's. I ran my 0-60 times with Nitto NT05R drag radials - not slicks... and lot's of practice.

[D111]

do you have a posse rear?