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| Webber advice.. https://www.ausmini.com/forums/viewtopic.php?f=2&t=21371 |
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| Author: | K-Bar [ Fri Aug 11, 2006 5:44 pm ] |
| Post subject: | Webber advice.. |
Gday everyone! Ive recently had my 998 rebuilt up into an 1100. Heres a couple specs, ENGINE: 40 thou over bore 1100 crank balanced lightened fly compression up to about 9.5, maybe more sports cam, one up from a cooper S standard..( is a daily driver) LCB extractors 1.75 inch exaust, RC 40 exit HEAD: Ported and polished chamber shapes changed bigger exaust valves. Runs great..pretty fast...but im only using a 1.5 SU my mini mechanic has offered a 45mm webber to me for $450...is on a swan neck manifold, and will be cleaned up to fit.. my QUESTION: Will it still be possible to choke it down enough to run nicely on my 1100. i do know its more common to use a 40mm..just that i think this is a decent price for this 45. any help please....thanks K-Bar |
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| Author: | h0nk [ Fri Aug 11, 2006 5:53 pm ] |
| Post subject: | |
Unless that price includes proper jetting and tuning for your engine I don't reckon it's a good price at all.. You'll have to put a weber box in aswell with the swan neck type manifold I believe? Otherwise you want to switch to a redline manifold which will cost you another $200 To answer your question yeh it's possible, chong (68deluxe) is running a 45 dellorto on this 1100cc engine. |
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| Author: | Mini Mad [ Fri Aug 11, 2006 5:56 pm ] |
| Post subject: | |
Chong is running a 45mm OK on his engine, but i think a 40 would be better.. The swan neck is one of those crappy bent manifold alex, no need for a box and more room than the 3005 redline... As alex said, if it includes the right chokes, jets and tuning, then it's OK .... |
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| Author: | h0nk [ Fri Aug 11, 2006 5:57 pm ] |
| Post subject: | |
Oh hold up nah you won't need the box with the swan neck manifold will you.. but these are apparently inefficient compared to other manifolds.. To be honest I would stay with the reliable 1.5" su.. if it's working keep it! EDIT: ah you beat me to it josh 
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| Author: | speedy [ Fri Aug 11, 2006 6:03 pm ] |
| Post subject: | |
or instead of a 1.5", get a 1.75" SU. 
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| Author: | K-Bar [ Fri Aug 11, 2006 6:14 pm ] |
| Post subject: | |
yes price includes getting it set up.. ive looked around here and people dont sell webbers for that much. the 1.5 is working, but i think it has issues..ive tuned it..done the spring and needle..but its using too much dashpot oil...and my mini is doing 9.4 litres per 100 Ks....thats not too good. i thought a webber would be worth the shot |
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| Author: | h0nk [ Fri Aug 11, 2006 6:17 pm ] |
| Post subject: | |
just don't go the weber for fuel economy
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| Author: | K-Bar [ Fri Aug 11, 2006 6:22 pm ] |
| Post subject: | |
yeh wat im saying is, if the SU is stuffed, and doing that, then i may as well go a webber with that lil bit extra feel to it |
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| Author: | Mini Mad [ Fri Aug 11, 2006 6:32 pm ] |
| Post subject: | |
K-Bar wrote: yes price includes getting it set up..
ive looked around here and people dont sell webbers for that much. the 1.5 is working, but i think it has issues..ive tuned it..done the spring and needle..but its using too much dashpot oil...and my mini is doing 9.4 litres per 100 Ks....thats not too good. i thought a webber would be worth the shot I have a similar amount of work done to yours (very similar spec actually) cept i'm running a 40mm dellorto and i get 9.8L/100km ...so i would expect that...this is a 40yo engine and you have added alot more power to it by modifying it, more power requires more fuel. And i hate to tell you, but it ain't going to get any better with a webber! 
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| Author: | K-Bar [ Fri Aug 11, 2006 6:48 pm ] |
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i KNOW that its an older engine..i KNOW that its hotted and will use more fuel... im saying that im using a ONE POINT FIVE INCH SU.. i COULD have more fun on the same fuel...it flutters between 9.4 to 9.8 usage per 100kms... i COULD just use a webber |
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| Author: | Mini Mad [ Fri Aug 11, 2006 6:59 pm ] |
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I do understand numbers and decimal points i didn't think you were running a FIFTEEN INCH SU...
There's no need to yell, we were all trying to help YOU Maybe someone who doesn't KNOW will read this and learn something. |
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| Author: | K-Bar [ Fri Aug 11, 2006 7:18 pm ] |
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| Author: | Spaceboy [ Fri Aug 11, 2006 7:27 pm ] |
| Post subject: | |
i would fit twin hs2's or a single hif44, i reckon the weber is overkill, and i think you'll dump a lot of petrol down the exhaust pipe |
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| Author: | h0nk [ Fri Aug 11, 2006 7:29 pm ] |
| Post subject: | |
Well overall: It IS possible to get the 45 jetted for your engine.If the $450 includes manifold, linkages, and completely set up for your engine then I'd say it's probably worth it. But just remember if theres bits missing it all adds up: linkage kit ~$90 air filter assembly ~$60 soft mount kit ~$40 - $50 jets can cost a fortune aswell! |
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| Author: | drmini in aust [ Fri Aug 11, 2006 7:38 pm ] |
| Post subject: | |
Jets and emulsion tubes for a 45 Dellorto cost around $100, Weber prices would be similar. Chokes are extra if the ones in it are too big. 
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