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| Is this a 1.75 Su ? https://www.ausmini.com/forums/viewtopic.php?f=2&t=90296 |
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| Author: | simonw [ Thu Aug 20, 2015 7:54 am ] |
| Post subject: | Is this a 1.75 Su ? |
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| Author: | sitnlo62 [ Thu Aug 20, 2015 8:30 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
Simon, That is an 1 1/2" SU HS4 1 3/4" has a square mounting flange with 4 holes. Dave |
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| Author: | 1071 S [ Thu Aug 20, 2015 8:55 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
The "1 3/4 inch" refers to the diameter of the carb inlet.... Find a tape measure?? Cheers, Ian |
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| Author: | timmy201 [ Thu Aug 20, 2015 8:58 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
This is mine, you can see the four square bolt holes to the manifold  
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| Author: | drmini in aust [ Thu Aug 20, 2015 9:09 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
1071 S wrote: The "1 3/4 inch" refers to the diameter of the carb inlet.... Find a tape measure?? Cheers, Ian Actually Ian, no, it refers to the carb outlet size. AN HS6 has a smaller inlet bore than an HIF44 does, but can be machined out for better flow than stock. |
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| Author: | timmy201 [ Thu Aug 20, 2015 9:13 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
drmini in aust wrote: 1071 S wrote: The "1 3/4 inch" refers to the diameter of the carb inlet.... Find a tape measure?? Cheers, Ian Actually Ian, no, it refers to the carb outlet size. AN HS6 has a smaller inlet bore than an HIF44 does, but can be machined out for better flow than stock. Inlet approx 41mm, outlet approx 44mm |
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| Author: | simonw [ Thu Aug 20, 2015 11:04 am ] |
| Post subject: | Re: Is this a 1.75 Su ? |
sitnlo62 wrote: Simon, That is an 1 1/2" SU HS4 1 3/4" has a square mounting flange with 4 holes. Dave Thanks mate , only had the picture so couldn't measure in person.. anybody have a 1 3/4 they would like to sell ..? Pm me 
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| Author: | 1071 S [ Thu Aug 20, 2015 7:07 pm ] |
| Post subject: | Re: Is this a 1.75 Su ? |
drmini in aust wrote: 1071 S wrote: The "1 3/4 inch" refers to the diameter of the carb inlet.... Find a tape measure?? Cheers, Ian Actually Ian, no, it refers to the carb outlet size. AN HS6 has a smaller inlet bore than an HIF44 does, but can be machined out for better flow than stock. Close enough for Government work..... Its the principle that counts (ie measure..)Interesting.. I always thought carbs necked down... Does that mean 6s don't?? The math tells me that 1 3/4" = 44.5 mm ... and the 44 under the bench measures 47(I) and 44 (O)..??? Which I would have known if I'd checked first ..  Cheers, Ian |
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