Amazon: - 123IGN B20 Curve Preset Request

gothamus · Jan 22nd, 2021, 23:58

There are a lot of discussions everywhere about 123Ignition and Volvo. I’m not intending to start rehash many previous discussions. Does anyone know the curve preset on the 123Ignition for a B20b? I have a tune+ / USB. The cost of access to fine tune is there are not suggested or preset curves available, so no way to know what the non-USB/Bluetooth 123IGN have. The examples are not applicable. Nine of the posts I read answer this question. Phil Singhers the closest I found to an answer for a ‘base curve’, but for a B18:

Nil advance up to 600 - 1,000rpm
11 Degs at 1,700 - 2,000 rpm
23 - 29 Degs at 4,600 rpm

I’ve got a B20e w/ SU HS6 carbs. I’ll need to adjust for the variance between it and a B20b. If I could just see what the B20b curve is I would be grateful!

Army · Jan 23rd, 2021, 09:13

I'm no Volvo expert but if I were in a similar position I'd be looking for generic information such as this =>

http://www.s262612653.websitehome.co...ews/timing.htm

Especially if there is a load of conflicting information / nothing to find from "official" sources.

It might take a bit of reading and learning but I guess following advice such as that linked above might get you closer to where you want to be...

Ron Kwas · Jan 23rd, 2021, 10:08

Gotham;

I'd generate a graph (or chart) of RPM vs Timing with a Timing Strobe, and compare it to the values given in the Volvo published chart for B20s and 30s, linked here: https://www.sw-em.com/Volvo%20Igniti...ugal%20Advance

Cheers

gothamus · Jan 23rd, 2021, 18:26

thanks gents. I read through a lot of other peoples results and made notes on their engines, what the manual and articles mention for the B20 E and f of '74 and used it as a starting point. Can't find my long USB cable. I use the old Surface tablet to adjust settings, then throw it on the windshield, start and make observations. Pretty cool HUD! Verified my suspicion that my vintage Smiths tach is almost 1k high.

Due to an interface issue on the old 123 I could not verify it's functions. Been avoiding spending the money to replace, but it must be 5 years old by now. Electronics don't last as long as mechanical things. Trying to beat a problem that keeps returning for the past year.

Jan 22nd, 2021, 23:58	#1
gothamus Member Last Online: Mar 23rd, 2022 02:07 Join Date: Aug 2016 Location: New York City	123IGN B20 Curve Preset Request There are a lot of discussions everywhere about 123Ignition and Volvo. I’m not intending to start rehash many previous discussions. Does anyone know the curve preset on the 123Ignition for a B20b? I have a tune+ / USB. The cost of access to fine tune is there are not suggested or preset curves available, so no way to know what the non-USB/Bluetooth 123IGN have. The examples are not applicable. Nine of the posts I read answer this question. Phil Singhers the closest I found to an answer for a ‘base curve’, but for a B18: Nil advance up to 600 - 1,000rpm 11 Degs at 1,700 - 2,000 rpm 23 - 29 Degs at 4,600 rpm I’ve got a B20e w/ SU HS6 carbs. I’ll need to adjust for the variance between it and a B20b. If I could just see what the B20b curve is I would be grateful!

Jan 23rd, 2021, 09:13	#2
Army marches on his stomach Last Online: Feb 11th, 2022 03:15 Join Date: Jan 2018 Location: Somewhere in the Netherlands	I'm no Volvo expert but if I were in a similar position I'd be looking for generic information such as this => http://www.s262612653.websitehome.co...ews/timing.htm Especially if there is a load of conflicting information / nothing to find from "official" sources. It might take a bit of reading and learning but I guess following advice such as that linked above might get you closer to where you want to be... __________________ 1961 Volvo PV544 the quick and easy in between project(!) 1981 Mercedes 300D <=> 230 diesel to petrol conversion project 1965 Series 2a Station Wagon mega build 1992 Mercedes 190E The car that works!

Jan 23rd, 2021, 10:08	#3
Ron Kwas Premier Member Last Online: Today 12:21 Join Date: Jul 2007 Location: Connecticut, USA	Gotham; I'd generate a graph (or chart) of RPM vs Timing with a Timing Strobe, and compare it to the values given in the Volvo published chart for B20s and 30s, linked here: https://www.sw-em.com/Volvo%20Igniti...ugal%20Advance Cheers

Jan 23rd, 2021, 18:26	#4
gothamus Member Last Online: Mar 23rd, 2022 02:07 Join Date: Aug 2016 Location: New York City	thanks gents. I read through a lot of other peoples results and made notes on their engines, what the manual and articles mention for the B20 E and f of '74 and used it as a starting point. Can't find my long USB cable. I use the old Surface tablet to adjust settings, then throw it on the windshield, start and make observations. Pretty cool HUD! Verified my suspicion that my vintage Smiths tach is almost 1k high. Due to an interface issue on the old 123 I could not verify it's functions. Been avoiding spending the money to replace, but it must be 5 years old by now. Electronics don't last as long as mechanical things. Trying to beat a problem that keeps returning for the past year.

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