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140/164 Series General Forum for the Volvo 140 and 164 cars |
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Carbs: SU-HS6 vs SU-HIF6Views : 7315 Replies : 9Users Viewing This Thread : |
View Poll Results: which do you rate more? | |||
SU-HS6 | 4 | 40.00% | |
SU-HIF6 | 6 | 60.00% | |
Voters: 10. You may not vote on this poll |
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Oct 31st, 2008, 12:04 | #1 |
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Carbs: SU-HS6 vs SU-HIF6
Hi All
Can anyone tell me what the pros and cons of the SU-HS6 and the SU-HIF6 are; how they compare as far a parts and servicing goes, performance wise and the level of difficulty of tuning the two and any special tools needed. Just as a side thought, I personally think the HS6 is a far more aesthetically pleasing carb but I have a feeling the HIF6's are better performers. Thanks for the input. Dylan |
Oct 31st, 2008, 19:15 | #2 |
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Dylan,
The HIF6 were used on our US cars for only 1 year 1971, there were a great deal of teething problems at first but were much better at retaining the proper fuel mixture and power over a greater temperature range due to the Bi Metal jet holder. The HS6 which needed constant adjustment were not good for controlling emission standards which were getting extremely harsh here in California , as emission standards increased power declined . Mister T. |
The Following User Says Thank You to Mister T For This Useful Post: |
Jun 26th, 2009, 08:22 | #3 |
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Last Online: Mar 4th, 2024 09:46
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hif6
120 estate
b20 hif6 40mpg on a run. previous twin hs6, set up on rolling road......20mpg you probably get the picture! |
Jun 26th, 2009, 11:49 | #4 |
Trader Volvo in my veins
Last Online: Yesterday 10:09
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Its not fair to compare worn carbs with nice new ones so the 20 - 40 mpg does not give much of an indication.
I would expect the HIF to give slightly better MPG (2% ish) and they do flow slightly better (HS6 210 CFM HIF6 240 CFM) so a small power increase could be expected. My big dislike of the HS6 is the external pipe from the bowl to the jet that has a nasty habbit of leaking petrol onto the exhaust. The problem you are likely to have is getting the HIF's to fit and work unless you are very lucky and find the correct ones. |
Jun 26th, 2009, 15:19 | #5 |
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Ciderman
Thanks for your input, you must have been digging around a bit cuz this thread is old! Classic Swede Are you sppeaking of HIF's that don't come off Volvo's being hard to fit? Dylan |
Jun 27th, 2009, 11:06 | #6 | |
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Quote:
That it, If you were to take HIF off say a metro you would have to make linkages to get it to work. Apart from that there would be no issues provided you change needles and jet to work with your engine. |
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