<html><body><div>The carbs have the red springs, one of the springs is quite a bit longer than the other and I did not check to see which needles are in them as per Larry's suggestion. I will do that. I will also check into the distributor, but like I said, this car was a driver for ten years, so I'm a bit perplexed. I will keep at though and report back.</div><div>Thanks!</div><div>SK </div><div><br>On August 10, 2019 at 2:42 PM, Kees Oudesluijs <coudesluijs@chello.nl> wrote:<br><br></div><div><blockquote type="cite"><div class="msg-quote"><p>This sounds like a carburettor problem (wrong needles/jets/springs?) where the car is running very lean between 2500 and 3200rpm. Check if there are any vacuum leaks.</p><p>Check the advance curve of the distributor, may be a spring from one or both of the bob weights is loose/broken/missing. <br></p><p>Check the timing of the cam shaft.<br></p><p>Mixture, ignition and cam shaft settings can be very different from the original because of the changes in the engine. It should really be set up on a rolling road.</p><p><br></p><p><br></p><div class="moz-cite-prefix">Op 10-8-2019 om 23:03 schreef Steven Kingsbury via Healeys:<br></div><blockquote type="cite"><div>To start off, my car, an early BN1, #598 was burned up in the Paradise fire and I just bought another BN1 to replace it. The new car has been hot rodded up a bit. Cam, bigger carbs and different pistons so it has a way different compression ratio and has been in this configuration for over ten years I believe. Was told it runs like the wind and came from a reliable and trust worthy person. Well I'm having problems with the car. Up to 2500 RPM, it runs great! When I can get it up to 3200 RPM it runs great again, it's the 2500 to 3200 range where I'm having problems.</div><div> It feels like it's starving for fuel, or it has too much fuel, it hesitates, feels like it's not running on all cylinders, and generally like a bucking bronco, but then at 3200 or so, she smooths right out and flies!</div><div> I was told the carbs were set up a little rich. I leaned them out one flat at a time and no difference until they got too lean and wouldn't run well at all. So I took them back to original setting positions. </div><div> I've checked all gaps, they're all right. Pulled plugs when getting home and they are all fine, a little brown and all even looking. New condenser, new coil, changed to new plugs, I have not checked the timing yet, but with the way it runs below 2500 and above 3000, it seems to be just fine.</div><div> I am getting the car up in the air Monday as I have new tires to replace the old ones and will do a static timing check at that time. My old four cylinder was a breeze to set up and ran smooth through all revs. What am I missing with an engine set up like an M? Why would things go south between 2500 and 3000 and run fine below and above?</div><div> All suggestions are welcome and I do have a new fuel pump on order, so fire away. I've been doing things one step at a time to not introduce new problems, but this is the only problem that is consistent.</div><div> Thanks,</div><div>Steven Kingsbury</div><div><br></div><br><fieldset class="mimeAttachmentHeader"></fieldset><pre class="moz-quote-pre">_______________________________________________
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