it was just an observation........geezz........sorry for askin

 

No, no! I'm sorry! That's the trouble with written communication, you can't see the other guy's body language (in this case I was grinning and winking). I'll try to be clearer next time. It was a joke, man!

Again, sorry 'bout that.

 

thank's for the reply......thought I was being incinerated....... :D . Have a great day..... :cheers:

kitt

 

No, man, not at all. What you just witnessed was my feebly attempts at humor.
See ya 'round, :cheers:

 

The problem with this is, that our analog guages are not linear, they give the min and max, but the marks in between aren't necessarily equal.

The guage goes from 0-80 with three marks in between, that doesn't necessarily mean that the marks stand for 20-40-and 60, they may in the case of the oil pressure, but on the other gauges they aren't.

So I really have no way of knowing what my true oil pressure is, I only know if I don't have enough, or too much.

 

:lol: :lol: See my picture above. :D

I have an aftermarket oil pressure guage for two reasons. For the first reason, I want to know the pressure and temperature at the same time. On the 1985-1989 dash the oil pressure is on the same display as the oil temperature, you have to switch between one or two.

And secondly, probably more importantly, the stock guage was junk. I was drag racing, the guage was showing 40-45 psi at idle, 60-65 psi at WOT. So I spun a bearing. After the bearing was spun(no oil pressure at ALL), the guage still showed 40-45 psi at idle. :(

The sender is non-circulating. Oil gets shoved up there, where it stays as long as the motor is running. Everything heats up, and that oil slowly but surely gets cooked to death. You get a nice sludge pack where a sensitive instrument is supposed to be, and then you don't have a working guage. :(

The picture I posted above isn't even accurate, I had wired the guage wrong at that point, and the oil pump spring was over-temped when I welded the pick-up on. So, since it was wired wrong, it was showing 25 psi all the time, when it should have been showing 50 psi, where the spring was blowing off the pressure. I finally got those two things taken care of, and now it blows off at about 76 psi. Cold idle is 55, hot idle is 26. For a while there, I was worried I had thoroughly screwed something in the engine and it was eating itself. I think three or four ulcers dissapeared when I got those things fixed. :)

:lol: :seeya

 

Hehy NoWorries, dis you ever figure out why you lost oil pressure when you spun that bearing? Man, that's gotta HURT! :cry

 

Car says 1100 at idle, datamaster says 900.
Car says 6000 at a WOT shift, datamaster says 57**.

 

It was my fault. :( I had about 1,500 miles on mineral oil. Those miles had 12 official 1/4 mile runs, and at least twice that many practice launches. The oil I was running wasn't capable of that abuse, there should have been at least four oil changes when there were none. The oil I was running through the engine was overheated and non-viscous...just generally used up. :(

After rod bearing #6(I think, I can't remember, it was over a year ago) let loose, there was very little resistance, pressure to the oil sender should have been little or none, the guage still said 40-45(right before I shut it off due to the knocking, obviously). Bearing #2 and #3 were showing massive wear, and all of the others were less than new. The main bearings, surprisingly looked great.

The guage wasn't at fault for the failure, but it did not report it after it happened. :eek:

 

I guess I have the same problem everyone else has. It's veeerrryyy slow.
With my chip allowing me to go to 6200, my tach is reading a little over 5 grand under acceleration. Just terrible!

 

The tach on my 90 was off by 700 rpms at idle. I installed an aftermarket unit. :cheers:

 

Damn what do you have done to ur car holy crap....There is no way my vette is that fast....
C4Dreams

 

I think I'm going to put my 6AL in with a 5000RPM chip to see what the tach reads when the rev limiter cuts in. I'm betting it's off by about 500-1000RPM under WOT.

 

YOU again! ;) Nice to hear from you KYVette90. You know, I just LOVE your car.... still for sale?

 

These results aren't lookin too good for the General. :eek: Anyone happen to know if the C5's are any better?

 

Mine is not only horribly inacurate, ......... it's very hard to read when I'm busy going fast and the responce time is quite slow. There is no way I could use it to shift by.