First drive on the highway...some questions??? - ZR-1 Net Registry Forums

Roadster · 06-15-2014

Took the ZR-1 out to the 74 yesterday, which is about an hour and ten minutes away from my home. Ran extremely well, but do have some questions regarding the coolant temp, clutch noise, and passing speed.....

1- I have Marc's chip in here, so the fans will come on @ 205* and come off @200*. I noticed that driving in 6th gear the temp would go up to around 213* at around 60-65 mph. If I dropped down to 5th gear, the temp would drop to 203* - 200* and stay there. I am not complaining by any means, but trying to understand why the difference in temps in the different gears. 5th gear was running about 2000-2300 rpm's and 5th gear was running about 1600-1800 rpm's for the same speeds. If the fans are coming on due to the temp change, then they aren't depended on the rpm speed? Correct? Maybe I'm missing something here, just curious....

2- Passing speed, when driving along in 5th or 6th gear, traveling @ 60-65 mph and you press down on the accelerator, are the secondaries supposed to open up. The car goes, but I thought I would get a better response. And yes, I realize that the r's are lower, and that if I downshifted to a lower gear, it would have a different result, just wondering how it should be???
Out of first or even moving in 2nd, it's just fine, did my first shift from 1st to 2nd above 6000 r's and I was moving, no miss, bog, anything of that nature. And of course, it feels like the secondaries open up just fine....

3- I noticed this nioise at low speed driving that it seems the throw-out bearing is singing a high pitched note, when I depress the clutch pedal, the noise goes away, and comes back when the clutch pedal is released, moving or standing still. Throw-out bearing????

Thanks for any and all responses...............appreciated....

06-15-2014	#1
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,914	First drive on the highway...some questions??? Took the ZR-1 out to the 74 yesterday, which is about an hour and ten minutes away from my home. Ran extremely well, but do have some questions regarding the coolant temp, clutch noise, and passing speed..... 1- I have Marc's chip in here, so the fans will come on @ 205* and come off @200. I noticed that driving in 6th gear the temp would go up to around 213 at around 60-65 mph. If I dropped down to 5th gear, the temp would drop to 203* - 200* and stay there. I am not complaining by any means, but trying to understand why the difference in temps in the different gears. 5th gear was running about 2000-2300 rpm's and 5th gear was running about 1600-1800 rpm's for the same speeds. If the fans are coming on due to the temp change, then they aren't depended on the rpm speed? Correct? Maybe I'm missing something here, just curious.... 2- Passing speed, when driving along in 5th or 6th gear, traveling @ 60-65 mph and you press down on the accelerator, are the secondaries supposed to open up. The car goes, but I thought I would get a better response. And yes, I realize that the r's are lower, and that if I downshifted to a lower gear, it would have a different result, just wondering how it should be??? Out of first or even moving in 2nd, it's just fine, did my first shift from 1st to 2nd above 6000 r's and I was moving, no miss, bog, anything of that nature. And of course, it feels like the secondaries open up just fine.... 3- I noticed this nioise at low speed driving that it seems the throw-out bearing is singing a high pitched note, when I depress the clutch pedal, the noise goes away, and comes back when the clutch pedal is released, moving or standing still. Throw-out bearing???? Thanks for any and all responses...............appreciated.... __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1974 L-82 355 Vert. 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member Last edited by Roadster; 06-15-2014 at 04:59 PM.