kevino

I recently installed a rebuilt engine from ATK and I'm very happy to have my car back on the road. One thing that I am still not sure of though is whether or not the timing is ok. When I put the CAS in I lined up all the marks properly but I did not adjust the CAS at all once it was in. It seems to run fine to me, but engine heat fluctuats a lot. If I am getting on the throttle pretty hard (a steep hill or fast acceleration), the engine heat will rise a little over 3/4 on the temp guage, but if I go down a hill with the car in gear or am sitting at idle the engine heat will go back down. I have an ancient timing light and am not sure if it will work with this car, I'm not sure how to check the timing anyway. By the way, I have a brand new radiator, nothing special just a stock replacement, but I think it should be cooling better than this. thanks

-kev

rx7-rage

i would like to know about this too. i know my timing had been changed at some point.....i remember don telling me this. he did it to make the car run better and stronger. but since kevino just brought this up, my car is having the same symptoms as his. i have done everything to keep the temps down ie: fluidyne, new water pump, new thermostat, redline water wetter, and the temps are nice and cool with normal driving, but tend to rise on really long trips, going up hill while accelerating fast, and getting on it for more than a couple seconds while it is hot out.

please someone let us know if timing could cause this.

kevino

figured I'd put us back on the 1st page

1FastT2

iTrader: (1)

Running a high degree of advance will directly effect the temp the engine will run at. Im not sure if it would effect it enought to make the temp gauge to rise above the 3/4 mark though. I suggest getting the timing checked and adjust acordingly. If its still running hot then you definately have another issue.

GLHS

Hey guys, having advanced timing does make the car run hotter. I run my 88 n/a @ 22 advance leading and 18 advanced trailing. This has caused my temp to be high, not as high as your are, but a increase of 100%. I was running @ half the distance to the first quarter mark, now it runs right on quarter mark, and hard driving for over several minutes makes it run right @ halfway.


So if its advanced, it may be too far.

My .02 cents.

Thaniel

I advanced my timing and now my car runs hotter. Used to run 1/4 or less now I am up around half. I have been considering switching it back to confirm that is what's doing it.

Your old timing light will work on the rx-7 just like any other car. Reset the timing back to factory and see what it does.

Chris Ng

https://www.rx7club.com/forum/showth...threadid=48411

Rotorific

iTrader: (1)

Timing does not affect your temp or enough to go all the way to 3/4 if your at 3/4 you got problems i have my timing sky high and another of my friends had his turned more than that and it didnt affect his it only went up to half way and he drag races it at a track

Chris Ng

You would be surprised at how little stress you actually put on your motor when you are drag racing.. The parts that get abused is your driveline (clutch, diffs, shafts etc)

You are scooting down a straight track for less then 18 seconds (depending on your car).. you barely load the motor up long enough to be able to tell if you have a cooling prob etc... Take the same car and drive at high load on the highway for awhile.. you'll begin to see the effects there...

While I'm not saying that the original poster's cooling problem is directly related to his timing, I'm jsut stateing that a car on the drag strip faces much diffrent stresses then a car on the road, and can not be used to compare