logicaluk
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For those of you who never wondered what goes in to making a pair of acclaim carbs take the following ingredients cooking time is about 30 mins at 65C (sonic) for each batch for a total of about 3 hrs to strip, clean and put them back together and they should come out looking like this Both true. Could it be that the accelerator pump is putting such little fuel in it's not really making a difference? So when you disconnect it, it stumbles more, but not enough to actually be noticeable in how it drives. Is there a little lever you can press to see if it's squirting fuel at all? I think you may have been right at least in part, I found 2 issues, the accelerator pump diaphragm was damaged, and the pilot jets were wound all the way in between them both, I'm amazed it ran at all. Tomorrow ill balance them on the bench and refit them. Fingers crossed. Dan
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logicaluk
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Every days a school day round here
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The carbs are sidedrafts with trumpets that turn 90deg so only when they're off the car will I be able to check the accelerator pump. Next step it to strip, clean and set them up on the bench see if that makes any difference, then once I've re-read the files Ill try blocking the air cut valves off see how that affects things. I'm going to email Mike Nixon the author of the SWF files for some advice.
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Last Edit: Aug 8, 2022 11:39:10 GMT by logicaluk
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logicaluk
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It could be not quite enough acceleration enrichment maybe. If it's a bit better under choke then more fuel might help just as you blip the throttle. Unless the choke holds the throttle open enough to be passed it. Then wouldn't disconnecting the accelerator pump make it worse?
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logicaluk
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VLC media player opens that first link, it plays REALLY fast, but I'm sure you could pause/slow it down. Thank you your a bloody genius.
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logicaluk
Posted a lot
Every days a school day round here
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logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
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I can report it's not the accelerator pump, I disconnected it, and it made no difference. Having spent 200 miles driving around back roads over the weekend, I think all acclaims do it but, its much less noticeable in standard cars, my mods have made it worse, lighter flywheel, freer breathing.
It's only at the first few % of throttle opening, it happens at all revs if the throttle is closed.
Thinking cap on. Dan
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Last Edit: Aug 7, 2022 16:26:25 GMT by logicaluk
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logicaluk
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After re-reading my post I had a thought and went out to check a spare set of carbs and found this bodge will limit the travel of the accelerator linkage to 3/4 but if it drives better, then the spring is only held on with a small split pin and should only take 10 mins to remove.
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logicaluk
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Post spanking report, it goes very well, for a 1300, but it's not right. I'm pretty sure it's a fuelling fault, I've tried the different vac take-offs, including no vac advance. The one on the bottom of the carb seems to give the best result, but it still dies on acceleration from idle, I can also hear a definite miss on acceleration from mid-revs. I tried blocking the vac feed to the crankcase ventilation pot, which richened the mixture up and made it more of a stumble than dead spot. The centre arrow is next to the first linkage, which moves with the accelerator when the tag hits the stop the pump leaver stops moving, the pump leaver pivots on the screw and the other end presses on the accelerator pump rod which goes down to the diaphragm. As I need the car tomorrow morning, I'm not going to pull the carbs to check them over, but I have a cunning plan, it involves some rubber hose masking tape and my nuts, 2 x M8 nuts to be precise, and it looks like this The idea being, to stop the accelerator pump pumping by hitting the stop prematurely, if it doesn't work then it's a quick tug to take them off and return it to normal service. From putting Frank away it did feel better, but it was on choke, ill see tomorrow when I'm out on our club run. I've also ordered an AFR gauge, so I can check how the carbs are actually doing. Dan
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Last Edit: Aug 6, 2022 20:52:01 GMT by logicaluk
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logicaluk
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I'll just leave this here
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logicaluk
Posted a lot
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I've been thinking about the dead spot just as I tip in to the accelerator, first I thought fuel, but I don't think there is any adjustment on the accelerator pump, so I thought I'll try a different vac signal to the dizzy and altho it's not cured it completely it's much more driveable, Today I'm playing with some Loti, so I'll report back after I've given it a dam good spanking. Dan
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logicaluk
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Wow I can't remember ever seeing one of these, but it looks amazing as a van and probably worth more in the long run. What ever you do it's bookmark worthy. Dan
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logicaluk
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Thanks DS, checked the vac advance, and the cam gears are good, it's an almost new dizzy I bought a box of acclaim parts at an autojumble and found a NOS dizzy still in its BL box. Dan
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logicaluk
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Couple of hours in the workshop tonight, and for all of you that have never wondered what the in side of an acclaim distributor looks like I stripped it down because it's been running odd, and it sounded rattly like one of the bob weights was loose, but as you can see it wasn't, just the odd running condition that caused them to clack, the bearing race, the advance plate sits in seems fine too, so it was reassembled, and It seems to run better afterwards, not a lot, but a bit better. Just after I put the car away, I thought air leek and spanner checked the carb mounting boots, one of which was not as tight as it could have been, I'll have to wait till tomorrow to find out if that was the cause. Some time ago I lost one of the transponders for the immobilizer, and I've been having kittens about losing the other one, replacements are £25 quid each, or a complete new immobilizer kit is £70 and programme the 2 new transponders to unlock the original unit and have an immobilizer for the next project. It's a Toad Sterling Excel. Dan
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logicaluk
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Fascinating stuff DS, I look forward to seeing where this takes you. Dan
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logicaluk
Posted a lot
Every days a school day round here
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I have some light bed time reading
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logicaluk
Posted a lot
Every days a school day round here
Posts: 1,373
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I woke up this morning thinking will the diff coap with the added torque.
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logicaluk
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Is this the engine with the cummins pin of death?
Dan
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logicaluk
Posted a lot
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Jul 31, 2022 19:18:58 GMT
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OK I'm sold on the wheels, and I'm amazed what a difference the bigger wheel opening makes to the stance of the car. If anyone has a set of MGF 15" Minlites under their workbench, message me please. Dan
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logicaluk
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Jul 31, 2022 15:52:08 GMT
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I had a 1.6 exec for years and loved it, only reason I don't have it now was, I had 2 prolapsed discs, and I couldnt get out of it or press the clutch down. Ive got a k arm and a rear wheel bearing for one left over if you need them. Dan
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Last Edit: Jul 31, 2022 15:57:16 GMT by logicaluk
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logicaluk
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Jul 31, 2022 15:47:43 GMT
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I wanted one of these some time ago but couldn't find one that want a complete basket case. Dan
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