RE: Vacuum Advance TEST why not use the manifold vacuum rather than ported. If he uses ported he'll have no vacuum advance at idle, that's when you want it. The only reason they switched from manifold vacuum to ported vacuum was for new emissions standards.
RE: Vacuum Advance TEST No , that's wrong ~ you don't want _ANY_ advance @ idle , that's why they use ported vacuum ~ the idea is : when you step on the throttle the ported vacuum comes in and bumps the timing up a few degrees , avoiding any hesitation or ' flat spots ' . If you connected the vacuum advance to manifold vacuum , it'd have fully advanced vacuum timing all the time , a bad thing . The vacuum advance can on the distributor has always been connected to ported vacuum . -Nate
Vacuum Advance The vacuum line was stopped up with 45 years of whatever. The advance mechanism works fine now and I notice the difference, expecially going up hills. I sure hope this repair helps with the MPG. Thank you men for the help. KentC
RE: Vacuum Advance Just curious, did you check to make sure the advance only worked above idle speeds. It should not be functioning at idle, as it uses ported vacuum, which comes in when the throttle plate opens a bit. Because it is vacuum operated, it should have very little effect when climbing hills, as intake vacuum will drop to a minimum under heavy acceleration conditions. It is designed to increase timing during cruising conditions, when the engine load is minimal, and the chance of pinging is small. That's also when the gas mileage will be increased the most. You just want to make sure it is kicking in at the correct times. Glad to hear the fix was easy.....Mike
RE: Vacuum Advance It works only above idle, as best as I understand. It only worked when I sucked on it and the vacuum held as I put my tongue on the end. I watched it at an idle, as I reset the timing (it was off again). While checking it out I gave it more gas up a draw (a short hill) and I felt a positive response not felt before, which I assume was the vacuum advance. The carb has a new kit, new points and plugs, valve and timing set. If the distributor is rotating as vacuum increases (increase in engine speed), what could not be operating correctly? I appreciate the comments. KentC
RE: Vacuum Advance You're all good to go Kent , yes it will indeed help fuel milage on the open road . I put a few hundred miles of desert driving on my '49 with 235 this weekend and the fuel milage really surprised me ~ I may have topped 17 MPG ! -WOW- . -Nate
RE: Vacuum Advance Was a semi pushing you????? Just kidding. That's amazing. Didn't think these old trucks would get that much. Are you running a single carb on that still, and wasn't it hotter than the devil down there last week too? I'm impressed. I may just have adjust my valves and finally give mine a good tune-up. Any good finds out there in the sand? Or was it a pleasure trip? Well off to bed....Mike
RE: Desert Trip Pleasure trip , I tied my old ' BITSA ' Honda CT90 into the bed and drove out to Ridgcrest for a CT90/110 club run to Randsburg , Red Rock Canyon etc. . I was pleasantly surpsrised by the good milage , I kept it up around 70 MPH the whole trip ,maybe a bit faster , running a tired 235 with single Rochester series 'B' carby and tall 16" Dayton radial truck tires.... 185* thermostat too , that really helps . It wasn't overly hot and in fact I hit heavy rain on the way home . One CHP officer told me to slow it down in town = . -Nate
RE: Desert Trip Sounds like my kind of trip. Glad to hear someone's got the time to enjoy it. I'm slowly getting to the point where I am more comfortable driving longer distances in mine. It's always been reliable, just need to put more of it back together. Any suggestions for carpeting? I don't really haul anything, just a driver. I have already insulated the daylights out of it, and just need to cover it up. CD sells some, as well as others, or thought about even a carpet store for some surplus. Any suggestions would be great, so I don't end up doing it twice. Thanks......Mike
RE: Cab Carpet Yes ~ this is very important and usually done wrong . You need _cut_pile_ carpeting as the loop typ is crap and holds onto anything that get in it , cut pile won't so when you brush out (I keep a counter brush on the floor) or vacuum the carpet it'll come clean quickly , not spend the day in there trying to get grass bits & gravel out . I always have the local trim shop make it up custom as it'll be better and cheaper than the moulded stuff the vendors sell . it should go about 1/2 way up the firewall and have the padding glued to the _carpet_ not the floor so you can unhook and remove it in case of flooding or deep cleaning needs . Match the carpet to the interior color you choose and it'll brighten up the cab quite a bit . NO RUBBER MATS unless it'll be a qarage queen as any water , even the normal tiny amount leaked in during washing , will stay and not be able to evaporate , even in Dallas in August , causing serious rusting . -Nate
RE: Cab Carpet I climbed in a carpet retailer dumpster and found something I liked, cut it and it pretty much secures itself, given the screw down fittings where the door meets the cab. Son and I did it on a Saturday morning, zero cost. I used no insulation, just carpet and it is not loud. The carpet definitely quieted it down. KentC
RE: Cab Carpet Thanks for the advice guys. I will start doing some checking for what is needed. I think I am going to go with black, as it should work nicely with my interior. I'll update with pictures once I get to that point. Thanks.....Mike
RE: Cab Carpet Dumpster carpet installed photo. It took a few washing, and scrubing, to get the grim out. The seat cover was $5 from an old Ford in a salvage yard (think the old boy minds?) and the shifter knob was from a 49 Farmall tractor, mine. The door trim was bought at a woman's fabric shop, cloth not vinyl, on sale of course, about $5. I try to do perfect work, but without spending money, a continuous challenge. http://iserver.chevyduty.com/dcforum/User_files/4356f2ae090c7c8c.jpg Attachments: https://talk.classicparts.com/images/attachments/4356f2ae090c7c8c.jpg
RE: Cab Carpet Looking pretty good there ! I wonder why the E-pay sellers can never get such a clear , well lit interior picture . -Nate
