Quote:
Originally Posted by Pro Stock John
6th gen A8 might be a totally different animal, but the 5th gens, if you lock at top of 2nd you might get a strong 60 and early performance, but the RPM drop is worse than if you didn't lock at all. Locking converters always pull the motor down.
Even with the gearing seems to me that locking up at the top of first not necessary but I've never messed with one of those cars yet.
If you look at BH's best slips, if you throw a 1.47 short time in there the car would go 6.9's in the 1/8th and run about the same out back. Would be a 10.85 ish slip.
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If you look at my last stock converter slips as well at +200DA our MPH's are almost the same. I was also on a 28" tire vs. his 26" tire. I wasn't getting 1/8 and 1/4 mph's together. But I went 99.7 in the 1/8 with no 1/4 mph and 125.07 in the 1/4 with only a 98.08 in the 1/8 on that pass. If I can apply the 1.47 to those mph's then I think I can get into the 10.70's.
Locking the converter with this gearing shifting at 6,500 get's you back to 4,700 or so on the 1/2 and 2/3. It get's you 5,200 on the 3/4 and 5,100 on the 4/5. So it isn't dragging the motor down below peak tq ever. With the stock IM, even when ported you only have about 1K rpm between peak tq and peak hp. HP falls off hard after that.
Tomorrow I am going to try to get some runs in with different gear lock ups. It just seems to me that if a car runs a couple mph faster in the 1/8 and 1/4 on the stock converter that is locked up that it should do the same with an aftermarket converter locked up as well.