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GM Engineering sets governor speeds, because the Corvette is the flagship it is going to get a little more than the f bodies. TV cable adjustment determines shifting under normal driving conditions.
GM Engineering sets governor speeds, because the Corvette is the flagship it is going to get a little more than the f bodies. TV cable adjustment determines shifting under normal driving conditions.
Do you know what a Corvette shifts to? Like what rpm?
GM Engineering sets governor speeds, because the Corvette is the flagship it is going to get a little more than the f bodies. TV cable adjustment determines shifting under normal driving conditions.
Far too many people believe this and repeat it. The TV cable has adjustment procedures to perform correctly and once done, it is to be left that way. You want a burnt trans, go ahead and play with cable for altering shift points. Shift point alterations should be done by changing weights and springs in the governor. There is a multitude of industry recognized transmission experts that will tell you the same.
One thing I think many miss is the cable does age, it will stretch a little bit as used., like any wrapped wire cable. The adjustment method does depend on a specific cable length.
As said, messing with it is playing with the life of the tranny. Myself, I did add a click or two as the shift 1->2 was pretty jerky for moderate throttle.
One thing I think many miss is the cable does age, it will stretch a little bit as used., like any wrapped wire cable. The adjustment method does depend on a specific cable length.
As said, messing with it is playing with the life of the tranny. Myself, I did add a click or two as the shift 1->2 was pretty jerky for moderate throttle.
Ours is brand new cable and trans I just night have to manually shift it a few hundred rpms more to see if it improves our ET.
Ours is brand new cable and trans I just night have to manually shift it a few hundred rpms more to see if it improves our ET.
I urge you to get the TV cable properly adjusted immediately. A loose cable can burn up the clutch packs almost immediately. Manual shifting or not, if the TV is not commanding higher line pressures with increased throttle, you are asking for severe trouble. The TV's job is not to adjust shift points but to raise line pressure according to engine load. Once again, the governor is where shift adjustments have to be made.
I urge you to get the TV cable properly adjusted immediately. A loose cable can burn up the clutch packs almost immediately. Manual shifting or not, if the TV is not commanding higher line pressures with increased throttle, you are asking for severe trouble. The TV's job is not to adjust shift points but to raise line pressure according to engine load. Once again, the governor is where shift adjustments have to be made.
Wait what I said our tv cable is new with a built 700r4 with 2600 stall convertor our 383 is brand new built by a reputable shop he set everything nothing needs to be adjusted at all the car is shifting at stock shifts points not giving us the full potential of the cam,heads and motor so thats why I asked how to raise the shift points other then playing with the governor I guess we will have to MANUALLY shift it... nothing was touched on the tv cable besides how it set it.. car runs great I think it needs to be shifted higher to go faster...
Have you had the car up on a dyno to determine horsepower and torque curves? If you are still running the stock intake that may be the limiting factor to your times and only a dyno run will indicate optimum shift points. TPI really chokes off the engine at around 5000 rpm regardless of what it could do with a different intake system.
My 90 still has the TPI and so when was it built I made sure to chose components that would maximize horsepower between 3500 and 5000 rpm. I increased compression ratio to 11.5 to 1 and chose a cam to maximize where I wanted the horsepower/torque curve. If your engine was built with components that would allow further gains at higher rpms, only changing the intake will provide the ability to reach it’s potential.
This a 383 stroker fully forged motor lpe219 cam d port 113 heads heavily ported and polished with a first performance intake im.sure it can go to 5800 or so car ran a 12.3 at 109.8 with a 1.6 60ft all on stock shift points hense why I want it to shift higher im.thinking it has more in it.. no dyno numbers but track tells alot. This is all controlled by a holley hp efi system
I agree with your assessment. If you hold it in a gear, say either first or second, does it continue to pull strong up to 5800 or fall off at a specific rpm? If it keeps pulling to 5800 your only option may be to control your shift points manually. If that does not help your option may be experimenting with the governor weights as arbee pointed out.
Strong times as it is, but I always like to see dyno numbers to know exactly what the engine is doing at specific rpm points to know where to shift.
Wait what I said our tv cable is new with a built 700r4 with 2600 stall convertor our 383 is brand new built by a reputable shop he set everything nothing needs to be adjusted at all the car is shifting at stock shifts points not giving us the full potential of the cam,heads and motor so thats why I asked how to raise the shift points other then playing with the governor I guess we will have to MANUALLY shift it... nothing was touched on the tv cable besides how it set it.. car runs great I think it needs to be shifted higher to go faster...
This is good information. Up to this point, no where do you mention that everything is adjusted correctly. New does not automatically mean correct.
This is good information. Up to this point, no where do you mention that everything is adjusted correctly. New does not automatically mean correct.
the shop that built and tuned it did all the adjustments unfortunately I did dyno it yet per strange we have a s60 dana rear it needed to be broken in 500 miles or so he had the car for a good 8 months due to COVID stuff there were delays in getting parts so when it was finished he said he did some good street tuning until we good throw it on the rollers we hit 500 miles had him to a fluid change then his dyno was down so we said screw it let's go run it I knew right away it was making power I felt it had more then I realized it was shifting at stock shift points lol.
