Search found 103 matches

by Geoff
Wed Mar 16, 2011 7:50 am
Forum: Electrical & Gauges Shop
Topic: Fitting Dyna coils to 900SS with Bosch ignition
Replies: 8
Views: 3783

Good question! I had a spare dual output 3 ohm (they're usually sold in pairs) so that's why I used a 3 ohm with the ballast resistor. Same result, just using what I had to hand! The 5 ohm would be fine I'm sure.
Best
Geoff
by Geoff
Wed Oct 20, 2010 8:14 am
Forum: Electrical & Gauges Shop
Topic: Fitting Dyna coils to 900SS with Bosch ignition
Replies: 8
Views: 3783

5ohm good without ballast resistors; I have 3ohm dyna plus 1.5ohm ballast with a Rita on my SS; with 3ohm alone the coil burnt out after 3000miles
by Geoff
Sat Sep 25, 2010 1:03 pm
Forum: Electrical & Gauges Shop
Topic: Lucas ignition testing
Replies: 8
Views: 3198

still, based on my conversations with Dyna and especially Mistral, I'd recommend chucking either 4.5ohm coil on or a 1.5ohm ballast with a 3phm. It doesn't harm anything but will almost certainly extend the life of the coil. (I used to think that the lower resistance on the coil the better for spark...
by Geoff
Sat Sep 25, 2010 5:30 am
Forum: Electrical & Gauges Shop
Topic: Lucas ignition testing
Replies: 8
Views: 3198

Good! What's the resistance of the coil you're using? The green dyna is 3ohm and it's probably to low. After much discussion with Mistral and Dyna I ended up putting a 1.5 ohm (I think) ballast resistor in series with it and it's been fine for starting and running. If the resistance of the coil is t...
by Geoff
Fri Sep 24, 2010 7:52 am
Forum: Electrical & Gauges Shop
Topic: Lucas ignition testing
Replies: 8
Views: 3198

I don't think Eurospares can help anymore. I've used (from the US and UK) the guy here both for spares and once for testing my unit: Mistral Engineering Unit 12 Taylors Gravel Lane Chigwell, Essex England IG7 6DQ +44 20 8501 2161 voice He's very helpful. In the end there was nothing wrong with the u...
by Geoff
Sun Sep 05, 2010 7:36 am
Forum: Electrical & Gauges Shop
Topic: Rita ? good or bad?
Replies: 5
Views: 2256

Advance curve is stepped but not like the electronica system! (ie. more progressive) The coil I use is a Dyna green 3ohm dual output (DC1-1); but I had one fail and now I use the 3ohm green but with a 1.5ohm ballast resistor and it's fine (recommendation of the guy that services them at Mistral engi...
by Geoff
Sat Sep 04, 2010 9:29 am
Forum: Electrical & Gauges Shop
Topic: Rita ? good or bad?
Replies: 5
Views: 2256

Rita works great; I have it on my 900SS. Keep the battery well charged as the Rita needs a batery in good condition and preferably >12.5V!
by Geoff
Fri Jun 11, 2010 5:44 am
Forum: Electrical & Gauges Shop
Topic: '76 900SS regulator connections
Replies: 3
Views: 2183

Bit late but does this help from rebuild?

Image
by Geoff
Thu Mar 25, 2010 11:15 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Valve Stem Seals
Replies: 7
Views: 5064

No; the O ring is about 1.5cm down in the guide from the top. If you have hte vlave out, yes you can see it.
by Geoff
Thu Mar 25, 2010 2:46 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Valve Stem Seals
Replies: 7
Views: 5064

Depends on head configuration, but simple O ring seal in a groove cut in the guide was the earlier practice, yes. Effective until it hardens. You have to have a lot of wear before guide sealing becomes a significant issue.
Regards
Geoff
by Geoff
Thu Mar 25, 2010 2:41 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Piston Rings 86.4mm
Replies: 26
Views: 9378

toomuch wrote:Is it a good practice to reuse the piston rings if they have no wear ?

Cheers

S
I wouldn't; for the best outcome fit new rings and hone.
by Geoff
Fri Mar 27, 2009 2:31 am
Forum: Engine & Transmission Shop
Topic: oil leak rear head
Replies: 5
Views: 4358

Are you absolutely sure the leak is from the O rings in the head and not oil weeping out of the exhaust header at the nut? I had the same problem and my first diagnosis was the same as yours. After screwing around for a while I figured out (with help) that the leak was weeping from that place, with ...
by Geoff
Fri Mar 27, 2009 2:16 am
Forum: Engine & Transmission Shop
Topic: 750 Sport Exhaust Question
Replies: 5
Views: 3046

I went for a plain nickel plate finish on the nuts. No significant polishing; still okk good after 5 years
by Geoff
Mon Mar 02, 2009 5:51 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: Piston Rings 86.4mm
Replies: 26
Views: 9378

For an international response to rings... when I lived in the US (three years ago) I had a smoky rear pot on my rebuilt '76 900SS. I had pulled the heads for inspection and just replaced them during the rebuild. @12000 miles. Bores were a bit scuffed, pistons same, both at the the outer end of toler...
by Geoff
Wed Jan 14, 2009 12:50 pm
Forum: Electrical & Gauges Shop
Topic: ss headlight
Replies: 57
Views: 12905

He told me he was thinking AUD400 originally, but then with all the fleaBay action was seduced to thinking that a higher figure might be more appropriate. He said he'd fleaBay it. So hopefully it will reappear. He seemed a little highly strung when I PM'd him and took offence immediately at the offe...

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