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1275 transplant progress.

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Testing continues..........
Today I took one of my local runs. With the 1098 and SU's I used to have to downshift from 4th to third to climb the (rather steep) hill up Headquarters Road. When I changed to stub stacks and K&N air filters on the 1098, I could accelerate slightly going up it by flooring the pedal. With the 1275 and Weber I can accelerate up the hill without even getting into the secondaries. .... ..... ....... getting closer to 500 miles every sunny day....

Just got back from my 2nd run of the day... 88 degrees ambient, a run down the freeway of about 10 miles brought the water temperature up to about 200 degrees... .. should I be concerned, or is this in the normal range? .. How high is HOT? .. Assuming 50/50 water/coolant, boiling is about 240 degrees? So 212 is still not too hot?

???????
 
Cool! That's my experience with my 1275 (actually a 1293). :smile: I rarely get over 200 degrees. I've touched 212 but not often.
I think 200 in 88 ambient is very nice (i.e., I wouldn't worry about it unless you were at 70 ambient).
So, drive it to Portland (again) and meet up with Pete, me and Roger... for an afternoon.
 
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Bill
That 200 is right on the edge of concern for me.
You may be running a tiny bit lean, if it gets much hotter than 200 you may want to set the carb a bit richer.
BillM
 
I agree with BillM. Are you sure of your ignition timing as well? The low pressure of the spridgets cooling system won't let you get that much above 212 before boiling either.

Kurt.
 
I'll keep a close eye on it then... the carb and timing were set up on a dyno by racing professionals so the jetting, mixture and timing should be spot on... If I have to I'll look to auxiliary cooling solutions.... .. I've been eying the evans waterless coolant idea very closely..... .. hmmmmmm...
 
Had it out today.. the freeway run of 10 miles in 60 degree ambient temperature brought the car up to 170 degrees. That seems just about perfect to me. I was close enough to 500 miles after the run that I rechecked the head torque, and changed the oil. The car wasn't cold enough to do a valve adjust, so I'll do that tomorrow. .. Hey, I tried to slide the feel gauge under the rocker and ran into two problems... One- with the copper heater return line in place, I can't seem to fit the feeler gauge in most of the adjustment points, and Two- where I could fit it, [like number one valve] the tolerance was too tight for it to go. .. I may go back to using my CLIK-ADJUST tool for the valve settings....Interestingly enough, the reference guide to that tool says that the clearance for both the 1275 and 1098 engines is .012 cold, but eight clicks on the 1098 and only seven on the 1275.... Is anyone else using a CLIK-ADJUST? If so, how many clicks...?
????????
 
Bill
"Click-adjust" may be "cool" but feeler gauges are safer and (in my opinion) much better!
If you do use the Click-adjust then be sure to check them with feelers too, too tight is DANGEROUS, too lose is noisy but safer! Too tight causes valves to burn.
BillM
 
Final Report.

Last weekend I took a trip to Astoria down US 30, a 100 mile round trip. The engine performed as well as I could have ever hoped. Passing uphill without having to get a run to get a head of steam built up was not necessary. Regular two lane passing just by hitting the gas, again, no run necessary. 30 mpg. ...

Friday night I set the valves, (with feelers as recommended) and Saturday morning drove up to Fife. Running at 60 mph for 100 miles I got over 40 mpg. For the round trip of about 200 miles, my average was about 34 mpg. The second tank included a trip to the LeMay museum (do that if you can!) and the run home, about 1/2 of which was 70 mph and showed 28 mpg. At an ambient temp of about 55 degrees, the car runs at 170 degrees, 68 psi oil pressure at 70 mph.

Suzanne commented that the car is now much quieter (i.e. we can actually talk without having to yell) and she thought that the ride had improved. Maybe the new seat cushions have something to do with that.

Overall, I now count the swop complete and a complete success. One more oil change in another 700 miles
 
Sounds like your ready for a trip to anywhere, Bill. Did you change anything to keep the coolant temp's down?

Kurt.
 
I haven't changed a thing. Not the fan, not the coolant, not the radiator, . .zip... different ambient, different running temp.
 
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