Minis need to breath. Twin 1.25 or a single 1.5 SU with a good free flow manifold - extractors and a straight though muffler (RC40 system is the best)
Simple steps will make a big difference before you go the trouble of a rebore
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| Help! https://www.ausmini.com/forums/viewtopic.php?f=2&t=26655 |
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| Author: | mini1989 [ Thu Jan 11, 2007 1:11 pm ] |
| Post subject: | Help! |
Hi all, Just got a few question on my Mini. 1: I am always getting petrol leak on the petrol tank neck. What do I have to do to stop the leak? I tried putting a new cap on, still no good. 2: Currently got a 998cc with an auto, whats the best thing to do to create more power without changing the engine and the gearbox. Anyone has a late 80's model Rover Mini? If so wanna meet up? |
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| Author: | sports850 [ Thu Jan 11, 2007 1:15 pm ] |
| Post subject: | |
1. Don't fill the tank all the way , mini's nearly always leak from the filler neck/cap if the tanks really full . I normally put the nozzle all the way in and only fill to the first "click" , any more and it comes out on the first right hand bend . Later mini's (like your's I think) had a flap inside the tank that was supposed to reduce the spillage but they still leaked .... 2. While not giving enormous increase of power a larger single SU or twin SU's or a weber/delorto carb and extractors will give you a bit more , reworking the head at the same time will also help things whilst keeping the original motor and not needing to take the motor out , just the head off . |
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| Author: | mini1989 [ Thu Jan 11, 2007 1:18 pm ] |
| Post subject: | Thank you |
Thanks for that Sports850, Should I bore my engine to a bigger capacity? The biggest I can go is 80cc and what sort of work I should do witht the head? |
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| Author: | sports850 [ Thu Jan 11, 2007 1:26 pm ] |
| Post subject: | |
I'd say only bore it larger if it's worn and has low compression (if it aint broke , don't fix it ... No point spending 3 grand or so when you don't have to) . As for the head work , it would be a good idea to get Vizards book (how to tune a mini ??? someone else can advise on the better one , I'm still using Clive Trickey's books ...) and read his reccomendations and then either have a play yourself or get someone to work the head . Basically opening out the ports and reshaping the combustion chamber to improve the airflow in and out of the motor will give you more power from standard . Bigger valves may help as well (not knowing what's on your motor at present) . |
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| Author: | Wombat [ Thu Jan 11, 2007 1:45 pm ] |
| Post subject: | |
Minis need to breath. Twin 1.25 or a single 1.5 SU with a good free flow manifold - extractors and a straight though muffler (RC40 system is the best) Simple steps will make a big difference before you go the trouble of a rebore
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| Author: | boho [ Thu Jan 11, 2007 2:14 pm ] |
| Post subject: | |
Hey there, '89. I got a 1992 Rover (check out link below). Please state your location in your Profile - i'm not interested in meeting up if your'e in WA! It also helps if you want a hand and someone local can pop round. 
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