Author Topic: 1275 A+ Engine Build  (Read 25512 times)

Offline BruceK

Re: 1275 A+ Engine Build
« Reply #225 on: November 17, 2017, 06:48:58 PM »
Very cool.   

Ive got an idea: Why not create a throttle lever like on a boat and that way you can mount it it next to the instruments on the console so you can adjust engine speed more easily?

Oh wait.  Add a second one for choke control!
1988 Austin Mini
2002 MINI Cooper S
2007 Triumph Bonneville

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #226 on: November 17, 2017, 07:11:24 PM »
Yes, that may happen eventually.....as long as I keep using the same carb.
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #227 on: November 18, 2017, 05:13:16 PM »
One last short vid of it revving....

A new gasket fixed the water leak at the thermostat housing. Changing the needle and jet made no difference in the way the carb worked, I either need to get a different one or see if I can figure out what the heck is wrong with this one. If I had a known carb I could slap on it then I could use it for a baseline and go from there.

Sounds really good now, ready for Dan to come up and haul it off, I'm sure he's anxious to replace the ailing 998 and see what this one will do with his dual carb setup. Should run considerably better than a 998 running on three cylinders.....


1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline John Gervais

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Re: 1275 A+ Engine Build
« Reply #228 on: November 18, 2017, 09:54:56 PM »
Did you try to connect those two hose nipples on the carb?
- Pave the Bay -

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #229 on: November 19, 2017, 07:59:57 AM »
John, where are those pics posted again? I can't seem to see them....I wanted to look at them again.

Edit: found them, no - I will try that next, thanks! You are an absolute fountain of information!
« Last Edit: November 19, 2017, 08:06:15 AM by MiniDave »
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #230 on: November 19, 2017, 05:03:59 PM »
No joy John, hooking those hoses up the way it looks in your last photo results in a no start, unhooking them the engine starts right up and runs as before.......I need to study on this carb some more.

But it did allow me to run the engine in and get the timing set. Today I re-torqued the head and reset the valves. The timing is set a little conservatively at 4* BTDC instead of the usual 8*

Tomorrow I'll pull the engine out of the stand and load Clancy's Moke engine in and start the process on it to see if it will start.....I think it will, it's basically a stock 1275 AA motor and it turns over smoothly without the plugs - I did squirt a little Marvel oil down the bores and let it set over night before I tried to roll it over, but it cranked over easily enough and it didn't sound like there was any rust in the bores. Clancy sealed all the openings with metal duct tape so it had little chance of any moisture getting in and ruining things. We'll see what happens next. I'll start a new thread for that one.
« Last Edit: November 19, 2017, 05:10:04 PM by MiniDave »
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline Lone Star Mini

Re: 1275 A+ Engine Build
« Reply #231 on: November 19, 2017, 08:35:23 PM »
Wonderfully impressive..
Lone Star Mini
1982 Morris Mini 1000HL
1992(?) Mini Cooper

Offline John Gervais

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Re: 1275 A+ Engine Build
« Reply #232 on: November 20, 2017, 09:04:55 PM »
Interesting - I seem to recall reading an article many years ago (KC?) that said those nipples should be connected.  Hence the pictures saved on my PC. 

Oh well - at least that engine sounds like it's running pretty sweet and the test stand is working well.
- Pave the Bay -

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #233 on: November 24, 2017, 09:48:42 PM »
I'm pretty happy with it these days, I can see several things I could have done better or differently but I'm OK with it so far.....
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline John Gervais

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- Pave the Bay -

Offline MiniDave

Re: 1275 A+ Engine Build
« Reply #235 on: December 09, 2017, 09:37:12 AM »
Red letter day, Dan came and picked up his engine yesterday, along with a few other parts. Future updates will come from him as he decides which car in his fleet will get the hot motor....I encouraged him to put it back in his Pup - mostly so he will finish it after 7 years!   ;D

Can't wait to hear how it performs, but it sure sounded good on the test stand.
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline 94touring

Re: 1275 A+ Engine Build
« Reply #236 on: December 09, 2017, 04:00:52 PM »
The truck has been parked a solid 10 years now!