Amazon: - Carburettor options? - Page 2

woodman · Mar 25th, 2015, 09:31

Yeah, there must be an air leak somewhere I expect. Thanks folks.

Ron Kwas · Mar 25th, 2015, 12:55

Removal of double post

Ron Kwas · Mar 25th, 2015, 12:58

guitarman;

...that's rather how I feel about SUs...as they say: Set-em...and Forget-em! ...and they don't have those stupid Diaphragms!

Derek has mentioned the important point to recognize: Installing dual SUs on an engine with an A cam is rather pointless...on the other hand, I suppose they would be justified by the silicon breast implant principle: Don't do much, but look great!

Cheers

Alf ista · Mar 25th, 2015, 15:55

Quote:

Originally Posted by Ron Kwas

guitarman;

...that's rather how I feel about SUs...as they say: Set-em...and Forget-em! ...and they don't have those stupid Diaphragms!

Derek has mentioned the important point to recognize: Installing dual SUs on an engine with an A cam is rather pointless...on the other hand, I suppose they would be justified by the silicon breast implant principle: Don't do much, but look great!

Cheers

Volvorama · Mar 25th, 2015, 20:35

Manual choke HIF6. Great unit. Always a few on ebay. Used on late Volvo 140s in the US single and paired. I recently imported a pair to use on one of mine, but I run my 144S on a single HIF purchased new many years back as a manual choke conversion kit for a Montego. Converted many 120s to HIFs over the years. Faster and better on fuel than even a new 175CD I once had.

woodman · Mar 26th, 2015, 12:00

Quote:

Originally Posted by Volvorama

Manual choke HIF6. Great unit. Always a few on ebay. Used on late Volvo 140s in the US single and paired. I recently imported a pair to use on one of mine, but I run my 144S on a single HIF purchased new many years back as a manual choke conversion kit for a Montego. Converted many 120s to HIFs over the years. Faster and better on fuel than even a new 175CD I once had.

Did you have any problems getting the throttle lever to calibrate correctly, ie go all the way round when you press the pedal? One issue for me is because I'm on auto transmission the throttle linkage also pulls the kickdown linkage, so the amount of throttle opening and the amount of pull on the kickdown need to correspond to each other. If the throttle action 'arc' on the HIF is the same as on the CD175 then I expect this would be fine, but if different then I might be in bother.

Derek UK · Mar 26th, 2015, 16:11

You might have custom make a lever for the carb to match it to the current set-up.

A shout out to Gillberry. Do you still have the HIF set-up that you had on the Estate before switching to twin SU's? If it's gathering dust in the garage you might have customer for the complete kit.

Volvorama · Mar 27th, 2015, 19:21

Hi Woodman. I use the lever from a scrap 175CD. Needs a bush because the spindle hole is too big but easy to make. As a result movement of SU spindle matches that of 175CD. Uses original throttle levers of course so no problem for your auto. Choke cable is easy enough to sort out. Have considered modifying one of those big round plastic 140 filters but I usually end up with an ITG foam filter for which there is an HIF mounting plate. Bit throaty but doesn't look silly.

northNH · Mar 28th, 2015, 12:29

"...Installing dual SUs on an engine with an A cam is rather pointless.."

Not sure how this attitude is justified, as Volvo didn't agree, at least at the start of B18/12volt production.

B18A's and D's BOTH used A cams early on. The D's changed to B cam, with slight compression increase, sometime in '63-'64, while A cams continued on in B18A's (and B20A's) till the end of production in '70.

The rated increase from a '62 B18D with A cam to slightly later B18D with B cam is 5hp, with the A (even with slightly lower coompression--8.5:1 versus 8.7) remaining a bit gutsier below 3K RPM...

You want max oomph below 3K, add some compression to an A cam engine with proper pair of SUs...Can't be beat for just moseying around in 4th or 5th gear...

Derek UK · Mar 29th, 2015, 12:58

"...Installing dual SUs on an engine with an A cam is rather pointless.."

Perhaps cynically, I might say that Volvo fitted the twin carbs with the A cam in the early engine, basically for the USA, who would think that a single pea shooter Zenith rather too down market. The B18A single carb version was never sold in the USA. The few B20 ones that came in were also twin carb only.
The twin carbs on the Amazon carried on the tradition of the "Family Sports Car" image that was promoted successfully with the PV544.

Mar 25th, 2015, 09:31	#11
woodman Master Member Last Online: Mar 10th, 2023 13:03 Join Date: Mar 2010 Location: Sheffield	Yeah, there must be an air leak somewhere I expect. Thanks folks. __________________ 1967 Volvo 121 Auto in everyday use and rolling restoration. 2002 Audi TT quattro. (Sorry!)

Mar 25th, 2015, 12:55	#12
Ron Kwas Premier Member Last Online: Today 02:54 Join Date: Jul 2007 Location: Connecticut, USA	Removal of double post Last edited by Ron Kwas; Mar 25th, 2015 at 12:59.

Mar 25th, 2015, 20:35	#15
Volvorama Too many cats Last Online: Aug 24th, 2023 09:02 Join Date: Aug 2011 Location: Birmingham	Go SU Manual choke HIF6. Great unit. Always a few on ebay. Used on late Volvo 140s in the US single and paired. I recently imported a pair to use on one of mine, but I run my 144S on a single HIF purchased new many years back as a manual choke conversion kit for a Montego. Converted many 120s to HIFs over the years. Faster and better on fuel than even a new 175CD I once had. __________________ Mark

Mar 27th, 2015, 19:21	#18
Volvorama Too many cats Last Online: Aug 24th, 2023 09:02 Join Date: Aug 2011 Location: Birmingham	Lever Hi Woodman. I use the lever from a scrap 175CD. Needs a bush because the spindle hole is too big but easy to make. As a result movement of SU spindle matches that of 175CD. Uses original throttle levers of course so no problem for your auto. Choke cable is easy enough to sort out. Have considered modifying one of those big round plastic 140 filters but I usually end up with an ITG foam filter for which there is an HIF mounting plate. Bit throaty but doesn't look silly. __________________ Mark

Mar 25th, 2015, 12:58	#13
Ron Kwas Premier Member Last Online: Today 02:54 Join Date: Jul 2007 Location: Connecticut, USA	guitarman; ...that's rather how I feel about SUs...as they say: Set-em...and Forget-em! ...and they don't have those stupid Diaphragms! Derek has mentioned the important point to recognize: Installing dual SUs on an engine with an A cam is rather pointless...on the other hand, I suppose they would be justified by the silicon breast implant principle: Don't do much, but look great! Cheers

Mar 26th, 2015, 16:11	#17
Derek UK VOC Member Last Online: Yesterday 15:54 Join Date: Jul 2006 Location: Chatham	You might have custom make a lever for the carb to match it to the current set-up. A shout out to Gillberry. Do you still have the HIF set-up that you had on the Estate before switching to twin SU's? If it's gathering dust in the garage you might have customer for the complete kit.

Mar 29th, 2015, 12:58	#20
Derek UK VOC Member Last Online: Yesterday 15:54 Join Date: Jul 2006 Location: Chatham	"...Installing dual SUs on an engine with an A cam is rather pointless.." Perhaps cynically, I might say that Volvo fitted the twin carbs with the A cam in the early engine, basically for the USA, who would think that a single pea shooter Zenith rather too down market. The B18A single carb version was never sold in the USA. The few B20 ones that came in were also twin carb only. The twin carbs on the Amazon carried on the tradition of the "Family Sports Car" image that was promoted successfully with the PV544.

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