123 Dissy with Bluetooth

Talk about the E-Type Series 1

lee-type
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#21 Re: 123 Dissy with Bluetooth

Post by lee-type » Sat Jun 30, 2018 10:26 am

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
Lee
S1 4.2 OTS

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juicerider
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#22 Re: 123 Dissy with Bluetooth

Post by juicerider » Sat Jun 30, 2018 4:15 pm

lee-type wrote:
Wed Jun 27, 2018 5:48 pm
How is your Tacho wired in?
I used an eBay external RVI to RVC converter.

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lee-type
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#23 Re: 123 Dissy with Bluetooth

Post by lee-type » Sat Jun 30, 2018 4:22 pm

good evening juicerider

Do you have a web link?
Lee
S1 4.2 OTS

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mgcjag
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#24 Re: 123 Dissy with Bluetooth

Post by mgcjag » Sat Jun 30, 2018 5:05 pm

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) & Building a C type replica, 1960 xk150fhc

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juicerider
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#25 Re: 123 Dissy with Bluetooth

Post by juicerider » Sun Jul 01, 2018 5:05 am

lee-type wrote:
Sat Jun 30, 2018 4:22 pm
good evening juicerider

Do you have a web link?
Yeah This is the one I used.
https://www.ebay.com.au/itm/Smiths-RVI- ... e71&_uhb=1

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andrewh
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#26 Re: 123 Dissy with Bluetooth

Post by andrewh » Thu Sep 16, 2021 10:13 am

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
1962 3.8 Series One FHC

http://etype860897.blogspot.com/

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mgcjag
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#27 Re: 123 Dissy with Bluetooth

Post by mgcjag » Thu Sep 16, 2021 1:25 pm

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) & Building a C type replica, 1960 xk150fhc

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andrewh
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#28 Re: 123 Dissy with Bluetooth

Post by andrewh » Thu Sep 16, 2021 1:29 pm

Thanks Steve. Will check it out. 👍
1962 3.8 Series One FHC

http://etype860897.blogspot.com/

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gtjoey
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#29 Re: 123 Dissy with Bluetooth

Post by gtjoey » Mon Oct 04, 2021 11:22 pm

jagwit wrote:
Tue May 15, 2018 7:33 am
I 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
Isn’t it just a wonderful, simple piece of kit!
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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