Old School Wrench Turner Opinions Needed

"f86sabre" (f86sabre) 04/28/2018 at 15:12 • Filed to: Mini

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So, our ‘90 Mini still doesn’t run like I would like. I’ve changed plugs and wires, cleaned out the carb and adjusted the valves. It runs fine at idle and above 3800 rpm. It has an aftermarket Weber carb on it and I think it is just too much for the 998cc engine. Any thoughts? Anything else I should look at?

KevlarRx7 > f86sabre 04/28/2018 at 15:22

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Get a gunsons colour tune, a box of different size jets, and get the combustion flame colour just right.

No excessive smoke from exhaust?

farscythe - makin da cawfee! > f86sabre 04/28/2018 at 15:33

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do you still have the regular carb? coz if you do you could swap it back and if it runs right then.. you know what your problem is

McMike > f86sabre 04/28/2018 at 15:38

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That Weber might be too much for that 998. Can you jet it down?

What do the plugs look like?

50ford500 > f86sabre 04/28/2018 at 15:40

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Yeah I’m going to join the chorus and say if it’s running fine at idle and over 3800 it has to be a carb issue

Demon-Xanth knows how to operate a street. > f86sabre 04/28/2018 at 16:16

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What kind of CFM does the Weber flow? I’d guess your needs are probably actually as low as 100-125 CFM. Much higher and you have more carb than the motor can handle.

f86sabre > Demon-Xanth knows how to operate a street. 04/28/2018 at 16:36

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Anywhere between 400-440 cfm depending on choke. So, yeah.

f86sabre > farscythe - makin da cawfee! 04/28/2018 at 16:37

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Nope. Car came with the Weber.

f86sabre > McMike 04/28/2018 at 16:37

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Dark and dirty.

f86sabre > KevlarRx7 04/28/2018 at 16:38

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Doesn’t appear to be too Smokey.

Demon-Xanth knows how to operate a street. > f86sabre 04/28/2018 at 19:04

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A 390 is good for a 2.7L Corvair.

f86sabre > Demon-Xanth knows how to operate a street. 04/28/2018 at 19:44

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I might have a carb for sale.

McMike > f86sabre 04/29/2018 at 07:40

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That sounds rich.