Quote:
Originally Posted by Pete
My Z peak power 6900rpm with 3.45 i finish in 3rd gear at about 7400 rpm
With 4.10's i finish in 4th at 6800 below my power peak so either i god with 4.33's or 4.50's
My Z looses about 15hp from peak (6900) to 7400rpm so not much loss.
I went from 1.74 60ft to 1.59 you would think 1.5 at 60 foot would get me 2-3 tenths i can't shift that fast so i loose it at the extra shift even if i got 11.00 it still did nothing for me.
Pete
|
This bench racing is fun isn't it? It saves on parts
I still think Pete could cut quicker times with 4.30's, or 4.56's (depending on tire). As he says, the 4.10's got him a 1.59 60ft. time, that's phenomenal, and a big advantage in the Qtr.
A .15 advantage in the first 60ft. is several car lengths in the traps. You don't lose that much, (maybe a fender), during the 3-4 shift.
That tells me that the 4.10's are not too much gear, but not enough. The reason his times got slower is not the third to fourth shift, but because he wasn't peaking out to 7,400-7,500 in the traps. The trick is getting the great launch AND peaking at the right rpm in the traps.
I see the stock gear as a disadvantage at launch. If he cuts 1.74 60 ft time with 550+h.p. and a stock gear, and I cut a 1.76 with 4.10's and a stock motor. How is that using all that horsepower that he's spent so much time and effort building? Just sayin'
More gear, more tire
