Pin4e wrote:
so i would be better with a single 1.5su or weber not twins?
Twins are OK if in good condition and jetted to suit. Unless it's a fire breather twin HS4s are too big on a 1098, I'd go for twin HS2s- and twin HS6 are way OTT..
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| why a weber and not twin 1 3/4" SU's https://ausmini.com/forums/viewtopic.php?f=5&t=11494 |
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| Author: | Pin4e [ Sat Sep 24, 2005 1:57 pm ] |
| Post subject: | why a weber and not twin 1 3/4" SU's |
I have a morris 1100k i know nothing about cars but love my mini and driving it, so want to get the best out of it that i can so help with any sugestions. Thanks in advance. |
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| Author: | 9YaTaH [ Sat Sep 24, 2005 2:06 pm ] |
| Post subject: | Re: why a weber and not twin 1 3/4" SU's |
Pin4e wrote: I have a morris 1100k
i know nothing about cars but love my mini and driving it, so want to get the best out of it that i can so help with any sugestions. Thanks in advance. Welcome Pin4e....you will find many threads here that talke about what carby goes with what size and state of tune your engine is. If you have a stock 1100 then I would think a 40mm Dellorto would be a good start with a big valve head and extractors....a 45mm Weber or twin 1 1/2" should be on a larger more highly tuned engine.... |
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| Author: | Pin4e [ Sat Sep 24, 2005 2:11 pm ] |
| Post subject: | |
i have extractors. the mechanic i was talking to recons that my carbie is to small for what i have |
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| Author: | speedy [ Sat Sep 24, 2005 2:12 pm ] |
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What carby have you currently got and what are the engine specs? |
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| Author: | Maxi23 [ Sat Sep 24, 2005 2:58 pm ] |
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Im guessing you will be running a 1 1/4" carbie, prettu stock standard and bugger all power. 2 x 1.5" carbie would be too much for a stock 1100 with extractors, i asked the same question to my mini mechanic. If you have the $$ run a 40mm webber, or get yourself a single 1.5" carbie. I upgraded from a 1 1/4" carbie just last month up to a 1.5".....well worth it!!! Good power increase. |
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| Author: | Pin4e [ Sat Sep 24, 2005 3:03 pm ] |
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why would 2x 1.5 be to much but a 40mm weber be ok isnt that even more power? or do they work different? |
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| Author: | h0nk [ Sat Sep 24, 2005 3:08 pm ] |
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With a single 40mm weber you will need to get it jetted properly for your engine.. With twin 1.5su's i think it would run too rich for your engine... |
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| Author: | Pin4e [ Sat Sep 24, 2005 3:16 pm ] |
| Post subject: | |
so i would be better with a single 1.5su or weber not twins? |
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| Author: | poeee [ Sat Sep 24, 2005 3:18 pm ] |
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I would go with a single 1.5" HS4 or even a 1.75" HS6 or HIF44. I wouldn't go any bigger, that is unless you have some big valves and a HOT cam! |
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| Author: | Pin4e [ Sat Sep 24, 2005 3:21 pm ] |
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ok should i get the values done before doing anthing with the carbie? or are there other things i should do first? start me form the beginning |
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| Author: | drmini in aust [ Sun Sep 25, 2005 10:53 am ] |
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Pin4e wrote: so i would be better with a single 1.5su or weber not twins?
Twins are OK if in good condition and jetted to suit. Unless it's a fire breather twin HS4s are too big on a 1098, I'd go for twin HS2s- and twin HS6 are way OTT..
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| Author: | Mike_Byron [ Sun Sep 25, 2005 1:51 pm ] |
| Post subject: | |
I have recently gone to a HIF44 on my 1275 and I think its a great carby. I got both the manifold and the carby ex-UK off Ebay for less that $AUS60 total. It will need a kit throught it once you get it here and the rubber "o" ring on the choke hardens and you get raw fuel bypassing the main jet. Graham Russell was a the MCCNSW meeting last week and talked out HIF's vs Webers and he prefers the HIF in favour of the Weber except for that final few horses in all out racing. He told us of a 998 that was using a HIF44 and using every bit of the induction possible at full revs. The mixture is of course controlled by the needle Mike |
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| Author: | gafmo [ Sun Sep 25, 2005 6:09 pm ] |
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I total agree..I have had my 1098 +60thou with a RE13 cam and with a HIF44 and it is good for 45.4hp at the wheels. Its a steady climb all the way and then does drop off...but who uses the very top rev's on the road. the first Dyno day we had her in Syd Morris was number one, this time it was second...but who knows it could have been just the advance or the mixture..but yes it does drop off at the end...by my dyno day experiance
And you still get that loverly induction sound 
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| Author: | Mini Mad [ Sun Sep 25, 2005 8:47 pm ] |
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gafmo wrote: but who uses the very top rev's on the road
*cough* I do 
Twin 1 3/4" will be able to provide more fuel than a 40mm Webber/Dellorto.. |
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| Author: | Lillee [ Sun Sep 25, 2005 8:54 pm ] |
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My vote is a single HIF44 on a good manifold for a small bore. Dellorto or webber only if you are willing to put up with the noise (i personally love it! )
Anything is better than what you have now... |
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