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Car Forum / MINI / January 2004Weber jetting
Hi good people, the story goes, i,ve just fitted a 1426cc stroker motor in my clubman, omega flat top pistons, seriously big head, 648 cam, 45mm weber, running on avgas, i went through vizard's book & fitted the biggest main jets i had 165's, it starts & runs but i have'nt driven it yet, as the car is used in club motorsport such as motorkhana's (or autocrosses in the UK???) & khanacrosses. I need it to be very throttle responsive, has anybody had experiences with a similar set up? any advice would be good before i start shelling out bickies for new jets. Happy new year from Australia. Doogie get a bucket and pour the avgas straight in! Sorry Mate Can't wait to see that thing fly! Aaron > Hi good people, the story goes, i,ve just fitted a 1426cc stroker motor in > my clubman, omega flat top pistons, seriously big head, 648 cam, 45mm weber, [quoted text clipped - 13 lines] > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.555 / Virus Database: 347 - Release Date: 24/12/2003 HI I'm currently running a 1450cc mini with a 45 Webber and have been for the past 12 years it's just been set up after a carb rebuild and it's putting out 110bhp with 124 ft/lbs of torque, the head is a 36/32 stage 5 VMax, cam is a Kent MD286 (2000/7500rpm), 5speed JK straight cut box with a 3.44 diff and it pulls like a train with a top speed of around 125 -130 mph.. Great fun and has been putting a smile on my face for years... I'll have a look for the jet numbers for you and post them later.. Karl. > Hi good people, the story goes, i,ve just fitted a 1426cc stroker motor in > my clubman, omega flat top pistons, seriously big head, 648 cam, 45mm weber, [quoted text clipped - 13 lines] > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.555 / Virus Database: 347 - Release Date: 24/12/2003 And Elvis was sitting next to Karl in the spaceship, which I thought was kinda weird, but then they turned to me and said: > HI I'm currently running a 1450cc mini with a 45 Webber and have been for > the past 12 years it's just been set up after a carb rebuild and it's [quoted text clipped - 3 lines] > mph.. Great fun and has been putting a smile on my face for years... > I'll have a look for the jet numbers for you and post them later.. So that would be, what, 74mm bore with an 84mm ground crank. Most impressed that you've managed to get a bored & stroked motor to last for 12 years. Fragile buggers in my experience. I've always reckoned you're doing pretty well to get 12 *months* out of one. Well it could be down to me only using it for weekend and summers and it has tried to push the transfer gears out of the casing twice but I guess with all the torque it's not that surprising. but apart from the small stuff it's bullet proof. 74mm Bore and 84.5mm Stroke. the engine was built back in 1990 and is still on the same bore/block and crank, the bearings are fine but it's on it's second head because I decided to go lead-free with a stage 5 VMax 36/32 and a set of straightcut JK drop gears. Karl. " The best way to predict the future is to invent It." - Alan Kay > And Elvis was sitting next to Karl in the spaceship, which I thought was > kinda weird, but then they turned to me and said: [quoted text clipped - 12 lines] > for 12 years. Fragile buggers in my experience. I've always reckoned > you're doing pretty well to get 12 *months* out of one. And Elvis was sitting next to Karl in the spaceship, which I thought was kinda weird, but then they turned to me and said: > Well it could be down to me only using it for weekend and summers and it has > tried to push the transfer gears out of the casing twice but I guess with [quoted text clipped - 3 lines] > it's on it's second head because I decided to go lead-free with a stage 5 > VMax 36/32 and a set of straightcut JK drop gears. I've seen a couple of 74mm bored engines cracked between 3 & 4 cylinders, and a few more wrecked or seized through the bores warping. My experience is mainly with cars used for hillclimb events, which I guess carries more risk of overheating than most other forms of motorsport. Ok I've just had the jets out and here's the numbers. Air Corrector = 175 Emulsion Tube = F9 Main Jet = 165 Idle Jet = 50F9 I hope this helps you on your setup. Karl. P.s. The car is very drivable at present but I'm going to put it onto EFI in the next few months so I can control the Ignition advance much better at idle.(Aldon dizzy is locked on full advance at the moment) > Hi good people, the story goes, i,ve just fitted a 1426cc stroker motor in > my clubman, omega flat top pistons, seriously big head, 648 cam, 45mm weber, [quoted text clipped - 13 lines] > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.555 / Virus Database: 347 - Release Date: 24/12/2003 Karl, thanks for the jetting specs, im running the same main jets, ill have a fiddle wuth it. Doogie > Ok I've just had the jets out and here's the numbers. > Air Corrector = 175 [quoted text clipped - 27 lines] > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.555 / Virus Database: 347 - Release Date: 24/12/2003 |
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