What causes hot start, I know timing but what is it that makes the car act like that when you go to start it again??? What physically makes the car seam harder to turn over for a sec??? Is the hot start hurting anything??? http://v8buick.com/showthread.php?t=44408
bad battery cables or coroded/bad battery terminals I just added new 4 gauge battery cables to mine and it starts much better when hot
Well I had no hot starts before vac timing, but it was real doggy, bogged bad, now vac timed it very responsive. Do I still need better cables? Course Its only hot started 3 times since then. Just got done about 20 mins ago.
A buildup of heat in the starter and associated wires greatly increases the resistance of the wires. So get a 12 volt charge to the starter to crank it over will now require much more than 12 volts. I installed a Ford solenoid and my hot start problem immediately vanished for good. The small wires that normally run under the headers and get heat soaked are now directed away from the heat and route along the inner fender. The only wire that runs to the starter now is to 00 gauge battery cable.
so the new better timing is just making the car run hotter, effecting the wires, making it hot start???
Not always. If it starts normally with the timing set more retarded, but cranks slower with the timing advanced I believe it has to do with cylinder pressure. With the timing trying to light the fuel earlier in the cycle it will encounter higher pressure as the compression will be at it's highest point when the spark occurs. Can someone please verify?
You must be right Yard, car has sat for 15-20 mins and it just turned over like it did before. Nice and easy. Ill get to work on them wires. Any chance you could make up a quick wiring diagram Yard how you did your Ford mod?? Just a quick paint shop thing. I feel better with cheat sheets to look over while I work.
So even then. Its kind of normal and nothing is wrong??? Or gonna get hurt. might piss my starter off from working hard but Id rather have the car running like it is now and deal with hot starts. If the motor is not getting any damage. I did my two longest 1 wheel burn outs yet to date, I like this new timing.
NICE engine picture in that other thread!!! :TU: Your advancing the timing would actually help the engine run cooler, retarting the ignition will make it run hotter. What's happening is that like Yardley said, now the spark is firing sooner before top dead center, building more cylinder pressure for the starter to overcome. If you've got a hot-soak problem, your starter was hot-soaking before, it just didn't have as much work to do. :Smarty: On a relatively stock 350 like yours, the stock starter/relay should work just fine, which makes me think your starter is tired/weak. Of course, a remote relay won't hurt a thing, and helps all around. :TU: What's your initial timing once you've vacuum timed it? You might want to back it off just a wee bit until you get the following checked out: If you haven't recurved the ignition advance, you'll gain a TON from doing that. Check out this thread for details and discussion, plus search this board for lots of other good reading. I'd also take the starter off and check it out, making sure it's clean and not dragging. You can take it to a rebuild shop and they can test it for you pretty easily. I'd also look into removing or bypassing most of those vacuum hoses and sensors, unless you want to keep it original - imho. :laugh:
If you hook up your vacuum advance to an unported source (so it increases the RPM when you plug the vacuum line in to the carb) then you can run less initial timing and it'll turn over easy then the timing bumps up once it starts and begins pulling a vacuum. Pull off your vacuum line at your vacuum advance, leave the other end going to your carb and plug it with a golf tee. The RPMs should drop. If not, then plug the line into a different port on your carb so it pull a vacuum at ide and increases the idle RPMs. See, that way it'll be timed only so far when you are cranking it over, then you get the extra RPM at idle once it does fire up.
Yea I need to do allot of work but this is as much as I can do now. We need one of them weekend - week long get together camp outs where we just wokr on each other cars and dial em in. Do engine swaps in 2 hrs with 15 people. I need help when it comes to timing stuff. My brain hurts when it gets detailed. I had to leave it on ported vac. It liked it better. It does run well. on man vac it would bog when you opend it up. On ported and the vac tming adjustments its very responsive. I was just kind of just playing for something to do. Nice day. Though id play around with things.
