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Engine Mechanical / Electrical / Re: Mechanical secondary opening ratio
« on: July 28, 2015, 08:55:36 PM »
I'm going to the lake on Friday. I will post the results. It should take long to swap out the linkage.
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Engine Mechanical / Electrical / Re: Mechanical secondary opening ratio
« on: July 28, 2015, 08:07:26 PM »
They do. I would have to look at the spec sheet to tell what size they are and unfortunately I'm out of town. I was talking to some gear head friends and we were thinking I should try the 1 to 1 setup but we aren't sure. It doesn't take that long to change I guess. It can be done while floating?
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Engine Mechanical / Electrical / Re: Mechanical secondary opening ratio
« on: July 28, 2015, 05:18:29 PM »
Exhaust.
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Engine Mechanical / Electrical / Re: Mechanical secondary opening ratio
« on: July 28, 2015, 04:54:26 PM »
It's a big day cruiser and I have a little issue out of the hole. At about 1/3 throttle it will pop 2 or 3 times when the motor has a good load on it. Once I'm on plane I have no issues anywhere in my throttle range. I have checked the adjustments on the accelerator pumps and they are good. The motor is a 557 ford 10.5 to 1 with aluminum heads. On paper the combination I'm running should make about 750 hp. I would like it to be clean out of the hole.
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Engine Mechanical / Electrical / Mechanical secondary opening ratio
« on: July 28, 2015, 04:37:13 PM »
I have a carb tuning question for the group. I am running a tunnel ram with QFT 750 mechanical secondary carbs. When I bought the carbs the linkage between the primary and seconarys was set up with a 40% ratio (primary's open approximately 40% then secondary's start to open. The carbs also came with a 60% arm and a 1 to 1 arm. Has anyone ever played with this? The boat runs pretty good but like everybody else I'm looking for more. Any help would be much appriceated. Thanks.
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