Burkey
Well-Known Member
Good responses from Mark and yourself. Appreciated.
I think the difference lies here:
As Mark said, first and second gears are redundant.
This makes third gear the go-to when you want to go WOT, provided that you aren’t making enough torque to break traction as you’ve highlighted.
Mathematically, a 3.55 MT82 on a 28.1” tyre will hit ~ 110mph in third.
So, for Joe Bloggs who wants to go WOT in third, he wants to be making as much torque as the road surface will allow.
Ideally, Joe’s going to want that peak torque to happen lower in the rev range so that he doesn’t have to be carrying as much speed when he goes WOT (because he wants to keep his license).
Using the graph from #36.
Scenario 1:
Let’s also assume that the Eddy is at the absolute limit of grip when it’s producing its peak torque. This would mean that the Eddy (in this case) offers more acceleration from 2500rpm to roughly 5500rpm.
Or, expressed differently 35mph - 76mph, representing basically most speeds that most drivers on public roads are going to be driving at. We know that downshifting isn’t an option, because traction. Whipple has the advantage from 76-111mph of course, but this assumes that both car decided to go WOT at 76mph. If they went WOT at 35, I’m not convinced that the Whipple would get in front at any point in third, but clearly the shift to 4th would change things up.
Scenario 2:
Whipple torque represents the limit of grip.
Unless the Eddy guy is damned good on the throttle, Whipple guy will produce the most acceleration across the board, wins every race, every metric.
For absolute clarity, I’m not asserting that this is perfect. Change the diff ratios or nearly any parameter in the equation and things might look quite different.
As I said from the very start, it’s not about TVS vs Whipple. It’s about being realistic with what YOU want from YOUR car, which is precisely why the racing crew with their DR’s, auto boxes/high stalls and delayed torque can’t see what the deal is, in the same way that I don’t see how peak horsepower figures are the be-all end-all for a car that needs flexibility.
@Meatball seems to get it perfectly and I totally agree with him that the rapidly diminishing horsepower curve on that Eddy is quite disgusting, which is why using that chart a few years ago had me buy a Whipple. The release of the modular inlet 2650 changed that significantly, making it far more flexible for MY purposes but if we’re talking a 10r80 car On the strip, I think you’d be hard pressed to make a good case against a Whipple or maybe even a KB if we’re talking PD blowers exclusively.
Each to their own, do as you must. Build a car that suits the way you drive it.
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