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GM should've put baffles in the gas tanks...

J57ltr said:
So do you think there could be something to speed up the tach, like you were talking about the fuel gauge? I'm fine with the fuel gauge on my car, but the tach is just too lazy.

Jeff
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On my '01, coming to a somewhat hard stop, my HUD will reach 0mph before my tachometer.
 


stealthee said:
That difference is most likely related to DBW.
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I might be inclined to believe that, but when the trans shifts it should drop as quickly as the RPM's drop when shifting, it just seems like there is a lot of buffering going on. I remember on some gauges in older cars that we would reduce the capacitance value and the tach would react quicker. On this one I am not sure if that would be a viable solution or if it is just buffered by the BCM or PCM's output whichever controls it.

Jeff
 
J57ltr said:
I might be inclined to believe that, but when the trans shifts it should drop as quickly as the RPM's drop when shifting, it just seems like there is a lot of buffering going on. I remember on some gauges in older cars that we would reduce the capacitance value and the tach would react quicker. On this one I am not sure if that would be a viable solution or if it is just buffered by the BCM or PCM's output whichever controls it.

Jeff
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I think you are confused here. The DBW is actually keeping the revs from dropping as fast as they used to, so what you are seeing on the tach, are the revs the engine is actually doing.
 
Nope, I understand what you are saying, but when the engine shifts between gears and I can hear the engine RPM drop the tach is still moving down then settles at the RPM it should be. Remember that my exhaust is very loud so I know when the rpm drops. It also flares when I let off the gas, but it barley shows on the tach. There is defiantly some filtering in the tach.

Jeff
 




Well hopefully when I get a shift kit it can help that some. My PA doesn't bang into gear, but the shift is solid and crisp, the GP is slow and sluggish. If there is lag in the way the tach responds I can't tell because of the trans. I'm sure they transmissions are too far apart to use any of the parts between them.

Jeff
 
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tranny guts are all the same, but the chains and gears and the hd diff are the only changes from one to the other. bill just took the guts from a h body trans and put them in a w body case. the outside of the case is different h to w body.

shift kit and a tranny tune helps a lot.
 
J57ltr said:
Well hopefully when I get a shift kit I can help that some. My PA doesn't bang into gear, but the shift is solid and crisp, the GP is slow and sluggish. If there is lag in the way the tach responds I can't tell because of the trans. I'm sure they transmissions are too far apart to use any of the parts between them.

Jeff
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Have you changed your filter?

Sent from my LG G3
 
No I haven't on either car actually PA is 176K GP is 141K. I planned on doing that when I did the shift kit. Which should be in the next couple of weeks.

Jeff
 
Shift kit ftw. I had reptile do me a tranny tune, but I recently put it back to stock for now (trying to cure this tcc kr issue) and I'm fine without the tune.
 


I need a way to tune, but can't see shelling out the money until I have headers and exhaust, P&P heads, LIM, SC and an IC. I think in the meantime I will get someone to tune it for a few tweaks here and there. But the shift kit is pretty high on the list, and it's looking like a radiator is in order. 5/8" thin core what was someone thinking?

Jeff
 
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