123 Dissy with Bluetooth
#21 Re: 123 Dissy with Bluetooth
Good morning JerryL770
I have just brought a bluetooth dizzy for a engine i am building and i also have a old rev counter that i want to convert to run off the more modern ignition. I am trying to get together all the in for i can so i can do the conversion to the rev counter.
Cheers
I have just brought a bluetooth dizzy for a engine i am building and i also have a old rev counter that i want to convert to run off the more modern ignition. I am trying to get together all the in for i can so i can do the conversion to the rev counter.
Cheers
Lee
S1 4.2 OTS
S1 4.2 OTS
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#22 Re: 123 Dissy with Bluetooth
I used an eBay external RVI to RVC converter.
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#23 Re: 123 Dissy with Bluetooth
good evening juicerider
Do you have a web link?
Do you have a web link?
Lee
S1 4.2 OTS
S1 4.2 OTS
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#24 Re: 123 Dissy with Bluetooth
Hi Lee...if you just type into ebay rvi to rvc you will find convertors....but what type of rev counter do you have an rvi or rvc.......thats why i suggested contacting http://www.speedograph-richfield.com
Steve
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
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#25 Re: 123 Dissy with Bluetooth
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#26 Re: 123 Dissy with Bluetooth
Back to this subject once more, can anyone help me with the best settings for the vacuum advance for a 3.8/4.2 engine. I have just checked and my MAP settings on the 123 Tune are completely incorrect, bonkers. Not sure whether I did something odd or never put them in? Any help would be great even if they are the original advance curves for the engine ? thanks in advance. Using it on saturday for Goodwood Revival so it would be great to get it set in time. Andrew
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#27 Re: 123 Dissy with Bluetooth
Hi Andrew....have a look here....start at post 107.......Rory put up some very good info explaining the vacume settings....may take you a few reads but all the info you need is there....Steve http://forum.etypeuk.com/viewtopic.php? ... 14#p139006
Steve
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
69 S2 2+2 (just sold) ..Realm C type replica, 1960 xk150fhc
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#28 Re: 123 Dissy with Bluetooth
Thanks Steve. Will check it out.
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#29 Re: 123 Dissy with Bluetooth
Isn’t it just a wonderful, simple piece of kit!jagwit wrote: ↑Tue May 15, 2018 7:33 amI should provide some feedback on this thread.
I purchased and installed one of these for the 4.2 S1 I've been helping a friend with. And I am highly pleased with the results!!
The car now starts by pressing the starter button and releasing it before you can actually hear that the engine is running, as you would normally say "On, off", that is how quick you press and release the button and she runs.
I've been playing around with curves and at one point I had the engine so responsive that it would best be described as "highly strung", so responsive (sporty) that I knew the owner (in his 70's) would not like it like that. I found myself having to DETUNE the engine so that it would have a more docile nature below 2000 rpm but thereafter I gave it all she's got.
I also found the carbs were not balanced and the mixtures were ridiculously rich on one carb and too lean on another. Once I had this sorted, she runs like a Swiss watch .
We took her out on an extended run over the weekend and the owner could not stop raving about how "the car is going better than ever in 25 years of ownership". He also kept on complaining about the lack of an overdrive gear!
Checking timing with a timing light shows spark at idle ROCK STEADY and 100% stable.
I attach the two curves she is running with at the moment but NOTE: This is running at 1450m AMSL (4750'), so I would expect lesser figures on the centrifugal advance curve where the car is closer to sea level. MAP advance might be very similar. These curves are thumb sucked by moi, and i'm sure one can do even better by tuning on a dyno.
This is the centrifugal advance curve. Note the upwards kink at 2000rpm.
Screenshot_2018-05-10-14-57-41.png
This is the vacuum advance curve. I have found with most of my EFI projects that engines with lower compression ratios are highly tolerant of "aggressive" vacuum advance, which is in part why I have this shape.
Screenshot_2018-05-10-14-40-23.png
Like your experience the only down side is that it exposes all the other warts the car has!
It transforms the car!
Gtjoey
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