I'm looking for the most efficient rear end I can find. The class I'm building for permits a rear end change, but no quick-change rear ends. I know Ford 9" rears are popular with drag cars because of their durability, but I also know that they are not always the most efficient.
I'm building for the I/GT class. The car will probably weigh in at about 1500 lbs, and horsepower looks like 120 @ 7000-7500, so I need to be able to spool it up pretty tight, but it doesn't have to be as strong as most LSR cars. The stock MG Spridget rear sees a lot of use in vintage and SCCA racing, but do any of you have any thoughts on what might be a better choice?
Pinto, Vega, Datsun, Toyota, Mitsubishi, Dana, Chevette, Morris, Opal? It needs to comply with section 2.E of the rules. Maybe something I'm unaware of? I'm not averse to thinking outside of the box on this one, but I would need to be able to buy a set of gears off of the shelf in the 4:11 to 4:30 range.
Any ideas from you Brit, Aussie or Kiwi racers?
OR -
Any ideas on making what I've got less of a power-suck?
Thanks.