| Author | Message | ||
     Johnod |
What should the temp be? I went for 1 1/2 hour ride about 70mph. Outdoor temp is 75-80, a nice day. Head temps after the ride , maybe 1-2 minutes after stopping are in the 380 range, with front being slightly less. Seems hot to me, smells hot, and the engine paint is discoloring as well. Any thoughts, thanks | ||
| Hootowl |
I believe normal temp is right around 275 degrees. Temperatures will vary between the front and rear, of course. | ||
| Hootowl |
Where are you measuring the temperature? | ||
| Two_seasons |
Assuming you are riding the S2. Are you sure it is not running lean? I'd pull the jets and see what the jet numbers are. | ||
| Hootowl |
I was just about to suggest that. A lean condition will result in temps in the 350-390 range. | ||
| Johnod |
Jets are new 180 and 45, along with some other CV performance stuff. I measured temp at several spots on the head, the best place seemed by plug, between plug and head bolt. Yes the S2 with Thunderstorm top end. | ||
| Ebutch |
Did you gap the Rings to spec ??  | ||
| Johnod |
Rings were gapped by Phelan. | ||
| Kmbuell |
John, my thunder-stormed S2 is running a 190 main and 145 slow. Temp is a bit high, but I've seen 350 on the VDO temp gauge on my '00 M2. It has a S3 fairing and dash. I filled the clock hole with a cylinder head temp gauge with the sender to n the stock spot on the rear head. Kevin | ||
| Phelan |
Check and make sure there isn't too much advance as well. But after a ride like that on a warm is day, Temps don't sound too bad IMO. XBs hit over 400 routinely. Rings were gapped and de-burred accordingly, no issue there. | ||
| Johnod |
I really don't know about advance. I timed it according to S2 manual, 2 dots in window at 1000 rpm. Should it be different? Actually I sent you an email a couple of days ago, asking that in a round about way. (Message edited by johnod on June 23, 2016) | ||
| Phelan |
I must have missed the email. Stock S2 timing is too much. You are now running a full point of compression more than stock. Retard timing about 3* and go from there. | ||
| Johnod |
Thanks Phelan, how do I do that though? | ||
| Phelan |
Use a black sharpie and draw a line on the timing pickup in the section with multiple lines, which each should be 1*. Extend this line onto the cam cover, so that when you turn the timing pickup counter clockwise, you have a mark that shows you when you've gone 3*. | ||
| Phelan |
Hold on. Let me double check the degree on each of those. I don't think it's 1* each actually. | ||
| Phelan |
Manual doesn't say how many degrees each mark is. I would turn the cam sensor 1.5 marks and see if conditions improve. | ||
| Johnod |
Right I forgot about those. Which way is advance or retard? And Thanks Again Oh I could look that up in the manual couldn't I? Duh.. Thanks again. (Message edited by johnod on June 23, 2016) | ||
| Phelan |
Clockwise is advancing, counterclockwise is retarding. You need to retard it ~3*. | ||
| Screamer |
Cam sensor spec (not published that I know of) states each mark equals 2-3 degrees. | ||
| Phelan |
Thanks Roger! So John, go one ticket counter clockwise. | ||
| Johnod |
According to my rough math, each mark is 2.388 degrees. So Screamer's info sounds about right to me. |
