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Fixed600hp in a 3200lb car should be good for high 10's..
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Fixed600hp in a 3200lb car should be good for high 10's..
I don't know where you guys have been. But here is the rule straight from the nhra rulebook.
http://www.geocities.com/boosted_eine/nhrarulebook.html
2.3 REAREND
After market axles and axle-retention device mandatory on any car running 10.99 (*6.99) or quicker and any car with locked differential. Cars running 10.99 (*6.99) or quicker that weigh more than 2,000 pounds (907 kg) with independent rear suspension must have swing axle differential replaced with conventional differential housing assembly.
edit: BBQ beat me...
I know of a couple sub 11 second factory cars on factory IRSOdd, I do know of more than a few sub 11 sec cars on factory IRS
Odd, I do know of more than a few sub 11 sec cars on factory IRS
Because I don't really know what I'm talking about, Ford fitted 9" diffs to cars that had 260hp from the factory (when the 200hp versions had 8.8" ones) ... and fitting the 8.8" smells a bit like a shortcut & every shortcut I've taken in Big Red Car has cost me 2x as much as just doing it properly in the first place.Forg, What are you referencing that suggests a 31 spline 8.8 is no good for 11's in a 3200lb car? You think he will "waste" and 8.8? How come?
Because the over-shoulder straps get all tangled-up in the extra links.narancs said:noob Q:
whats wrong with the IRS? Why it isn't good for dragging?
The IRS rule was meant for Jaguar type IRS's that used the axle shaft as a means of holding the wheels attached to the car. If an axle snapped the wheel could go flying. The rule does NOT apply to an irs where the axle shaft is only used to transfer torque to the wheels.
I LOL'dBecause I don't really know what I'm talking about...
thanks.. I know dragging and cornering are 2 different world, but i thought IRS is better.. bc it is more efficient or somethingBecause the over-shoulder straps get all tangled-up in the extra links.
Well actually, it's because there's more room for movement & angles that can allow things to bend & break. You could definitely set something up to work, but the regulations are to stop the cheapskates from killing themselves.
Because I don't really know what I'm talking about, Ford fitted 9" diffs to cars that had 260hp from the factory (when the 200hp versions had 8.8" ones) ... and fitting the 8.8" smells a bit like a shortcut...
Because I don't really know what I'm talking about, Ford fitted 9" diffs to cars that had 260hp from the factory (when the 200hp versions had 8.8" ones) ... and fitting the 8.8" smells a bit like a shortcut & every shortcut I've taken in Big Red Car has cost me 2x as much as just doing it properly in the first place.
Because the over-shoulder straps get all tangled-up in the extra links.
Well actually, it's because there's more room for movement & angles that can allow things to bend & break. You could definitely set something up to work, but the regulations are to stop the cheapskates from killing themselves.
S'not quite the same though; the 7L engine had a lot of marketing-clout, whereas barely a poofteenth of a percentage of the buying populace would've known anything about differentials.This is also the same company that fitted 7 litre engines when 3 litre ones would've done. American vehicles have historically been massively over- engineered. How do you think they produced these axles in the first place?
S'not quite the same though; the 7L engine had a lot of marketing-clout, whereas barely a poofteenth of a percentage of the buying populace would've known anything about differentials.
Ford Australia weren't exactly "over engineerers" either, they did things like putting 250ci 6cyl Falcon engines into Mk3-Mk5 Cortinas such that the front ends would bend while the cars were still in warranty if you went for the optional factory aircon system ...
I don't think he's using a Volvo engine of any sort if he's aiming in the 10's with a 240 ... not on the cheap, anyhoo.