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1622 Engine

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DevonMG John Russell
Okehampton, Devon, UK   GBR
I have a BMC 'B' series 1622 engine which, according to the reference table on Barney's site, came out of a Morris Oxford/Austin Cambridge. According to the engine number (see below) it has a high-compression head. Clearly it has a single carb, a simple '1-into-2-into-3' exhaust manifold, and probably a rather tame cam —which perhaps all account for the lower power output (61bhp) but does anyone know whether there are any other differences from the MGA engine internally?

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old B engine 1.JPG    51.1 KB
old B engine 1.JPG

old Austin Morris engine 1622 high comp 3.JPG    55 KB
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ghnl Avatar
ghnl Silver Member Eric Russell
Mebane, NC, USA   USA
1961 MG MGA "Calvin"
It may not have been machined for the tach drive (left side rear of block - the tach drive gear is at the back of the camshaft).

see: http://mgaguru.com/mgtech/engine/cm200.htm



Eric Russell ~ Mebane, NC
1961 MGA #61, 1981 Alfa Romeo GTV6, 1984 Alfa Romeo Spider, 1991 Honda ST1100



Edited 1 time(s). Last edit at 2018-03-05 12:58 PM by ghnl.

Bolney Coupe Avatar
Bolney Coupe David A
Haywards Heath, Sussex, UK   GBR
1960 MG MGA 1600 Coupe "Iris"
John

What is the horse shoe shaped bracket between spark plugs 3&4?

Cheers

Dave

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Gary E Avatar
Gary E Silver Member Gary Edwards
Kernersville, ,N.C., USA   USA
Looks like a water outlet pipe.



Gary

ghnl Avatar
ghnl Silver Member Eric Russell
Mebane, NC, USA   USA
1961 MG MGA "Calvin"
In reply to # 3692058 by Bolney Coupe What is the horse shoe shaped bracket between spark plugs 3&4?

Looks like a hose or pipe attached to the heater outlet.



Eric Russell ~ Mebane, NC
1961 MGA #61, 1981 Alfa Romeo GTV6, 1984 Alfa Romeo Spider, 1991 Honda ST1100

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Yes - remote heater valve so just a spigot coming out of plate with two holes to attach it to the head.

The Austin version may need the following to convert it to MG use:

- drill out tach drive hole and fit cam with tach gear on it
- high compression pistons ('high comp.' Austins weren't as high as MGA)
- forged crank rather than cast (can probably ignore this on a street car).



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC




Edited 1 time(s). Last edit at 2018-03-06 01:38 PM by bills.

DevonMG John Russell
Okehampton, Devon, UK   GBR
To answer questions: the 'U' shaped pipe is a 'U' shaped pipe coming out of the head. I assume to carry water.
There is no tacho drive exit machined in the head—though there are two blind holes to take the holding screws.

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Old B engine 8.JPG    62.7 KB
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copernicus Avatar
copernicus Nick Kopernik
SW, CT, USA   USA
John, the bore & stroke, from what could find, is the same for both the MGA & Morris version. I'd expect that cam and valve specs would be different, but could not find any details. Does the head have a "16" cast into it at the rear of the head?

DevonMG John Russell
Okehampton, Devon, UK   GBR
Hi Nick

Yes it does. And it has '1622' cast in the block where one would expect. Given the MGA is 90bhp and this engine 61, I suspect it's only the cam, exhaust and single carb that drop the power.

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bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
In reply to # 3692318 by DevonMG Hi Nick

Yes it does. And it has '1622' cast in the block where one would expect. Given the MGA is 90bhp and this engine 61, I suspect it's only the cam, exhaust and single carb that drop the power.


Nope. We had a ton of these here in Canada. The A60 Cambridges were all over the place, locally, All of them were low compression - 8.3 like the MGA 1500, not the higher 8.9 of the Mk 2 MGA . They also used a tamer camshaft. They were down over 30 bhp (i.e. 33%) on the MGA 1622, but they do make a good source for parts for MGA engines.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

DevonMG John Russell
Okehampton, Devon, UK   GBR
The engine number plate says it's high compression, Bill. Could it be because it's for a home market car? Maybe export cars had a lower compression?

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
In reply to # 3692322 by DevonMG The engine number plate says it's high compression, Bill. Could it be because it's for a home market car? Maybe export cars had a lower compression?

No, even the twin carb models used on the Riley 4/72 was 8.3. For an Austin or Riley, or Magnette Mk IV, the 'H' WAS high compression - at 8.3. The only non-MG applications I've come across that used the 8.9 compression pistons were the TVR Grantura (I had that engine in my 1963) and the Elva Courier, which bought the MG spec high compression version.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

copernicus Avatar
copernicus Nick Kopernik
SW, CT, USA   USA
So I'm in learning mode here.....found the attached BMC engine code list; on pg 2., the following is posted as an example for a 1622 engine:

16AMW / U / H 1234 1622cc Austin, Morris & Wolseley Farina, central gear, high c.

According to this, the engine should be a high compression unit; is the list incorrect?


Attachments:
MG_Engine_numbers.pdf    19.6 KB

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Quote: 15W / U / H 1234 1489cc Wolseley 15/50, central gear change, high comp.
15GE / U / H 1234 1489cc M.G. Magnette Mk3, central gearchange, high comp.
16AMW / U / H 1234 1622cc Austin, Morris & Wolseley Farina, central gear, high c.

Those are all high compression - which in the case of every one is 8.3. If it were low compression it would have been lower.

High compression for the MGA 1622 is 8.9.

Go look it up on Carfolio. They have it correct (this time)



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

copernicus Avatar
copernicus Nick Kopernik
SW, CT, USA   USA
Bill, thanks!

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