Quote:
Originally Posted by lippy
I'm settling on my final engine options for my Cobra, and the power range will probably fall in between 600-650HP. The car is an ERA 427 and it has the standard Salisbury LSD rear end with inboard brakes, 0.82 TKO600, 3.54 rear, and I'll be using Avon tires. ERA tells me it's probably fine with 600 HP as long as I don't drive like an a**hole, and it may take up to 650 HP. But at that point and beyond, I should go to the 31 spline half shafts, etc. I won't be tracking this car (maybe very occasionally), and while I will get on it sometimes, I won't beat on it.
So my questions are: how much power have folks put through a "standard" Salisbury LSD rear end with no problem? Has anyone had failures, and if so, under what conditions and using how much HP? Thanks.
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I have been running various Salisbury diffs for years with minimal problems. I have broken several stub shafts but they were the original 10 spline Cobra and later 19 spline Jag units I have only broken 1 ring and pinion and that was this year at the Laguna Seca 50th anniversary Cobra race. The gears are very durable and if you get 30 or 31 spline stubs you will have no issues.
Ratio's were 3.31,3.54,3.90,4.10 the 3.31 was the easiest to drive because of
less wheel spin at lower speeds.
As Rick said, make sure your car doesn't chatter because that will break most anything. I run Hoosier 335x30x18 A6 tires and they hook pretty well.
Flywheel HP 806 @7500 Torque 652 lb/ft @ 5500, 594 lb/ft @ 4000 probably around 500 lb/ft @3000 so the Diff isn't getting much of a break at low rpm.