Twin Carbs: what was fitted to which engine

[@garthlee8166]

Many thanks for sharing this much appreciated

[@eb28211]

Again a very nice video. A few notes: the 140 series also used the SU HIF6. I would also have liked a few notes on the different intake manifolds used in combination with the twin carburetor setups.

[@amazoncars]

I should indeed have mentioned the B18 140's, I left it implied only I think! Or do you reckon the B20 140 had SU's also? Very good point about manifolds - another quickie video needed I feel! Thanks Lars, Rob

[@amazoncars]

And the HIF was fitted to some 140's I believe, but I've never seen that on a car over here, besides Harvey Steele's rally car. R

[@eb28211]

@@amazoncars B20B did come with twin SU-HS6 and SU-HIF6 - beside the Strombergs

[@amazoncars]

@@eb28211 Do you know what market got the HIF's Lars? I should relabel the video "Commonly found twin carbs"! Rob

[@amazoncars]

@@eb28211 My B20 Amazon parts catalogue makes no mention of HIF nor twin Strombergs: only single Strom or twin HS6's? Rob

[@michalton]

Hello, greetings from Poland. I started restoring my P1800e and I have an idea to change the fuel injection to be powered by two Weber 45 carburetors set. My mechanic friend advises against it and says that at idle the engine will sound like a tractor but from 2000 Rpm it will be rocket, and basicly that those Webers are a bit to big. What I want with carbs is that beuatyfull sound and historic feel, some decent power around 120 BHP. I am asking for Your advice on this topic, schould I try with these carburetors or maybe use smaller Weber 40, maybe a different brand or stick to injection. Afert seeing Your videos I know that You have massive knowledge about those engines, please give me some thoughts about it. Thanks for any advice. Best regards, Michal

[@Dima.P121]

I have 2 SUs H6 (KN needle) in my garage and I´m driving a Amazon B20A (Stromberg). Can I put them on my B20A? I Just would like to have 2 Carbs for better looking - not for more power..

[@amazoncars]

Cams & Carbs don't like mix'n'matching: an A cam with twin carbs results in an engine that won't rev (the A cam), and less torque at the bottom end (twin carbs); equally, a D-cam and single carb results in an engine that won't rev (single carb restricts the redline) and has less torque at the bottom end (the D-cam). So, I would always have to say "no" to twin SU's on the A-cam... Rob

[@eb28211]

@@amazoncars Hi Rob, the B18D with twin SU-HS6 - from the PV 544 Sport had the same A-cam as the standard B18A - well not completly true, the G-serie Sport ( the so called 1966 model) did get the B-cam.

[@amazoncars]

@@eb28211 Excellent Lars, thankyou, I didn't know that! I tried A cam and SU's on our London2CapeTown 140, and it just didn't do anything very well! Rob

[@SjaakTrekhaak23]

@@amazoncars How can you tell the differences between the cams?

[@amazoncars]

@@SjaakTrekhaak23 The ID is stamped on the aft end of the camshaft: so to be certain what it is you have to pull it out of the engine

[@122amazonls5]

What are the b16 engine twin carbs worth? You said rare

[@amazoncars]

Actually no idea Joel, I've never bought/sold any! At a guess a nice pair ought to be over 200GBP... Rob

[@conceptalfa]

👍 👍 👍!!!

[@amazoncars]

Thankyou!

[@randyphillips2263]

Just in time. I am going to start screwing up my SU HS6's in a few days. Wish me luck and try not to laugh.

[@way2tall7]

☘

[@amazoncars]

There's a couple of tricky bits when doing the SU's Randy: 1. Fitting the butterfly shaft bushes is a machine task, but often not necessary 2. Centring the jet, so that the needle doesn't bind on it, preventing the slide from moving Otherwise it's a pleasant task! Rob

[@retrospectdesigns4137]

@@amazoncars do you recommend someone for a professional rebuild of the HS6?

[@amazoncars]

@@retrospectdesigns4137 In the UK: Burlen Fuel Systems would be our first choice, and Southern Carburettors a very close second. Rob

[@retrospectdesigns4137]

@@amazoncars awesome! thank you :)