It should be at 4700-4900. Thats where it will accelerate the hardest. I doubt his is that high though. My converter stalls to 3100 at zero boost/vacuum. At 25psi its at 4600-4700. It shifts at 5900 and falls to a tad over 5000 at 29psi. I only have 6 degrees more duration. If mine goes below 4800 on shifts it slows down.:wink: Fwiw mine accelerates the quickest between 5100 and 5400.:wink: :wink: :wink:
How to increase WOT shift RPM
- Thread starter fc227
- Start date
KL Mallender
Certified Dumb****
- Joined
- Apr 16, 2007
For what I see he has in equipment and his performance to date, I submit that he install a D-5 or equivilent stator/stall converter, verify shifts at 4700-4900 afterwards, install adjustable pinion snubber to 1-11/2 gap, stage car with 15-18 psi on the gauge, launch with at least the left front dangling and say hello to the elevens, the 3500 converter will be needed later when he gets a little further in engine build, but not at this time, he will be better off using D-5 and not locking up the clutch(when clutch is locked-torque will not be multiplied) if locking up clutch improves trap speed signifantly using stall converter, that is your first clue that stall speed is too high, although higher stall speed is sometimes necessary when bigger turbo and cam combinations are used, but I don't believe it's helping him right now with present combo. Just my 2cents, not looking for a beating :wink:
Kevin.
Kevin.
I agree that he is not gaining any et over a stock converter if the car is launched the way you describe if he had a D5.
I do have ported and polished heads . But the Cam would be holding me back. rated 1000 to 4200 rpm.
Fixed the boost controller so I will be back @ ~ 25 #'s of boost.
Just installed new Moroso lower control arms (I got a real good deal on these
).
Season opens in two months , More tuning coming.
Fixed the boost controller so I will be back @ ~ 25 #'s of boost.
Just installed new Moroso lower control arms (I got a real good deal on these
).Season opens in two months , More tuning coming.
I do have ported and polished heads . But the Cam would be holding me back. rated 1000 to 4200 rpm.
Fixed the boost controller so I will be back @ ~ 25 #'s of boost.
Just installed new Moroso lower control arms (I got a real good deal on these
Season opens in two months , More tuning coming.
You cant go by the cam spec rpm. With a turbo and heads you can go way beyond the rpm you have given. You should make power to 5400 easily. That would most likely be the optimum shift point. Ive seen the comp 206 go over 130mph with ported iron heads.
Use the cz gov, vb combo
