Volvo judson supercharger kit - Page 2

Groundes-Peace · May 16th, 2016, 11:50

Saner,
Interesting posting from you on this topic.
Do you have any "Before and After" figures you could share, so one can understand the type of power and performance differences one could expect.

Saner · May 16th, 2016, 12:53

Afraid not on real-word before and after, but here are some figures for comparison (All figures measured at the flywheel):

Volvo B16B Service Manual: 85bhp/5500rpm - 86.8lb.ft/3500rpm
Judson Advertised Figures: 124bhp/5500rpm
My Rebuilt Engine w/ Judson: 112bhp/5500rpm - 101.5lb.ft/3500rpm

What is nice is that is sticks around the 100lb.ft all through the rev range. Still have some tuning to do and will update when it is all properly dialed in.

222s · May 16th, 2016, 22:10

The chances are that the original Judson figures were optimistic in the first place! Far from unusual at the time. E.g. a Morris Minor 1098 has a claimed 48bhp, but someone I know put a fully reconditioned unit with all ancillaries on the Froude dynamometer in his test cell & it had only 39.5 bhp.

Btw, when you say measured at the flywheel, was that a rolling road guesstimate of the flywheel figures for your engine, or actual flywheel figures on an engine dyno? If the former, then that could also explain part of the difference.

Saner · May 17th, 2016, 08:23

I mentioned flywheel to make that distinction, was on an engine dyno.

Agreed, Judsons figures would have been optimistic, and I wasn't expecting them.

It's also worth noting that with my B16, I'm having to consider an eltric water pump to keep temperatures down, and a fuel pump upgrade to satisfy the top end when accelerating.

Burdekin · May 17th, 2016, 08:29

When you consider the cost to build a performance B20 and what you end up with then a supercharger upgrade is certainly attractive.

Saner · May 17th, 2016, 13:58

Personally I think I would choose a performance B20 over a Period Judson. Only reason I kept the B16 was due to its rarity. If I had the later Amazon with the wider transmission tunnel I'd whack in tuned B20 with Overdrive.

Burdekin · May 17th, 2016, 15:25

Quote:

Originally Posted by Saner

Personally I think I would choose a performance B20 over a Period Judson. Only reason I kept the B16 was due to its rarity. If I had the later Amazon with the wider transmission tunnel I'd whack in tuned B20 with Overdrive.

A modern supercharger would be interesting though.

Saner · May 17th, 2016, 18:43

Would require figuring out where to mount it but the MINI Supercharger is cheap and reliable.

May 16th, 2016, 12:53	#12
Saner Member Last Online: Jul 10th, 2023 15:43 Join Date: Aug 2010 Location: Bracknell	Afraid not on real-word before and after, but here are some figures for comparison (All figures measured at the flywheel): Volvo B16B Service Manual: 85bhp/5500rpm - 86.8lb.ft/3500rpm Judson Advertised Figures: 124bhp/5500rpm My Rebuilt Engine w/ Judson: 112bhp/5500rpm - 101.5lb.ft/3500rpm What is nice is that is sticks around the 100lb.ft all through the rev range. Still have some tuning to do and will update when it is all properly dialed in. Last edited by Saner; May 16th, 2016 at 14:03.

May 16th, 2016, 22:10	#13
222s Amazoniste Last Online: Sep 19th, 2016 21:52 Join Date: Nov 2002 Location: Emsworth View Photos By: 222s	The chances are that the original Judson figures were optimistic in the first place! Far from unusual at the time. E.g. a Morris Minor 1098 has a claimed 48bhp, but someone I know put a fully reconditioned unit with all ancillaries on the Froude dynamometer in his test cell & it had only 39.5 bhp. Btw, when you say measured at the flywheel, was that a rolling road guesstimate of the flywheel figures for your engine, or actual flywheel figures on an engine dyno? If the former, then that could also explain part of the difference. __________________ Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock.

May 16th, 2016, 11:50	#11
Groundes-Peace Master Member Last Online: Mar 14th, 2024 17:23 Join Date: Jun 2009 Location: Milton Keynes	Saner, Interesting posting from you on this topic. Do you have any "Before and After" figures you could share, so one can understand the type of power and performance differences one could expect.

May 17th, 2016, 08:23	#14
Saner Member Last Online: Jul 10th, 2023 15:43 Join Date: Aug 2010 Location: Bracknell	I mentioned flywheel to make that distinction, was on an engine dyno. Agreed, Judsons figures would have been optimistic, and I wasn't expecting them. It's also worth noting that with my B16, I'm having to consider an eltric water pump to keep temperatures down, and a fuel pump upgrade to satisfy the top end when accelerating.

May 17th, 2016, 08:29	#15
Burdekin Chief Bodger Last Online: Yesterday 18:14 Join Date: Oct 2009 Location: Aberdeen	When you consider the cost to build a performance B20 and what you end up with then a supercharger upgrade is certainly attractive.

May 17th, 2016, 13:58	#16
Saner Member Last Online: Jul 10th, 2023 15:43 Join Date: Aug 2010 Location: Bracknell	Personally I think I would choose a performance B20 over a Period Judson. Only reason I kept the B16 was due to its rarity. If I had the later Amazon with the wider transmission tunnel I'd whack in tuned B20 with Overdrive.

May 17th, 2016, 18:43	#18
Saner Member Last Online: Jul 10th, 2023 15:43 Join Date: Aug 2010 Location: Bracknell	Would require figuring out where to mount it but the MINI Supercharger is cheap and reliable.

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