Overheating help

mind you since ive run that dyno. ive tuned the carbs more and have up'd the front sprocket up a tooth. also i replaced the sparkplug wires which wern't on there too well lol :blush:

Since I live in Az... Hotter then HELL! I as well am going this route, don't think I truly have a choice....

Here's some results of testing I've been doing.... On a triple digit day and in a hearty run oil gets up around 250*F.... :ohmy:

The intake and exhaust port measurements where accomplished with Laser temperature meter so the numbers may be off a little due to aiming... Oil temp was measured with Fluke temperature meter and bead sensor inserted into the engine case.

NOTE: For these measurements, running 20W/50 non synthetic... Once break in period completed going with Mobil 1 15W50 due to recommendations and it has a very good level of ZDDP.

Great info on engine temperature! Thanks for taking the time to make the measurements and post the data. What is the CC and C/R of the engine? Are you using an oil cooler?

Also, if you have a chance...It would be interesting to know if the temperature continues to rise if you let the bike idle for 5 - 10 minutes after the 20 mile high speed run.

Good work! Thanks again.

No oil cooler, one of the reasons I'm doing all this....

1015cc Wiseco 10.25:1 compression
Webcam .365 lift camshafts @ 283 duration
29mm carbs Keihins
Kerker w/1.5" Baffle
Dyna S EI and Dyna 3 Ohm Coils

"It would be interesting to know if the temperature continues to rise if you let the bike idle for 5 - 10 minutes after the 20 mile high speed run."....

Hmmm, I just didn't think of that... Same time, I never let it idle for any duration as such without a cooling fan on the motor so it would most likely cool down.

From most of the research I can find, thermostat controlled cooler are switching on ~ 180*F so yeah, I'm over that considerably. Especially considering we haven't even reached our HOT time of the year....


And yes I do realize, who in their right mind is going to ride when it's 115*F out.... No joke, July & August here is 110-115....

Kinda sears the nads to the seat..... :blink:

I have a similar setup. 1075, 0.365 cam and 4 into 1 with a 2" baffle

I was thinking that the 5 - 10 minute idle time might simulate what would happen in stop and go traffic after a run on the highway.

Anyway, good to have the numbers before installing the cooler. Now you can do a before/after comparison when the cooler is installed and enlighten us.

you guys have me worrying about more intense heat then your bikes since my cams are bigger. i just started fiddling around with my accelerator pump on my carb's and my bike is really start'n to haul ass. i wish i had done that a while ago. :side: it seemed to help cool it down a little with more gas being sprayed in once in a while but its probably my imagination

Well there are some many variables that effect the engine cooling such as we're speaking of but you also have advanced/retarded ignition, souped up in power top ends, head work, how you ride, the oil your using, ambient temp such as here in Az 115*F coming up soon...

All in all, first step for me anyways since I'm not using this as an ever day ride, synthetic oil when I hit ~ 1500 miles on the new re-build. Then re-do my temp tests and if still over temp, then Earls oil coolr for sure...

Hell, I just might do this anyways for GPZ1100 air cooled bikes came stock with oil coolers... I think the Kawi team new something thus did this on the newer GPZ....

OMR

Not to be a jerk here.
Now that you have the bigger pistons, 435 cams,36mm carbs, etc., you have a higher rpm setup. Now you are taking this high rpm setup, driving down the street and accross town with it. Can this over heating be, a down side to a modified engine?

Perhaps it will run cooler, when it is in it's favorite operating range? What range was it built to run in ?
Do you need lower gears, so it can rpm a little to hit that range?

Silver Tiger wrote:

you guys have me worrying about more intense heat then your bikes since my cams are bigger. i just started fiddling around with my accelerator pump on my carb's and my bike is really start'n to haul ass. i wish i had done that a while ago. :side: it seemed to help cool it down a little with more gas being sprayed in once in a while but its probably my imagination

nads.com wrote:

Silver Tiger wrote:

you guys have me worrying about more intense heat then your bikes since my cams are bigger. i just started fiddling around with my accelerator pump on my carb's and my bike is really start'n to haul ass. i wish i had done that a while ago. :side: it seemed to help cool it down a little with more gas being sprayed in once in a while but its probably my imagination

The valve springs are getting hot and the heat isn't leaving the head. Best way to cool down besides a cooler (of beer) is jetting up.

i have been trying to make the carbs richer then they should be to help. also i don't really get on it hard too much a stay around 4 to 5k rpm im happy with cruzing at 80mph and 5th gear. the bike is gear'd to the point where it will go 100 in 3rd at about 8.5. i did go a little over board with the cams i know :blush: