still have trouble starting once motor is hot?

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mobileaudio25

G-Body Guru
Jan 12, 2012
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columbus, ohio
i have a 355 sbc with a .489/.476 lift cam with a duration of 287/317 and comp cams suggest running the timing between 35-38 and im around 37 right now. I only have a 9.4 compression motor as well. I was suggested a "budget starter." Its a china made gear reduction starter made in china that i paid $60 for, but multiple people have said they have good luck with them. I had the starter tested and it only pulls 35 amps. im using the 3 stock ignition wires and a 6ga wire from the battery. I am also running a jegs starter heat wrap around my starter. Does anyone have any clue or suggestions as to why it wont start once its up to engine temp?

by hot i mean up to temp (190)
 
Not up to speed on chevy motors, but I just wonder what you initial timing is set at? if its too far advanced, the car will have a tough time starting without a choke. If it starts with the choke manually activated, then I would bet thats the problem. When its hot, the fuel mixture is much leaner, and it takes a lot less advance to get it started. I have seen this problem with a lot of high performance engines that have the timing set high for performance gains..... just sayin
 
This very well could be my problem. Im not sure my initial timing, i had it set by someone other than myself. BUT, i'm running an electric choke and you can watch the tach and see the choke working however, my carb mechanic said that when the car is running you shouldnt be able to move the choke shaft or push it in or something like this. sound familiar? Im going to check my initial timing, but the choke on my carb may me faulty as well.
 
what carb are you running? Im old school, not familiar w/electric chokes so you might want to get another opinion on this. Are you pushing on the gas before you try to start it? That would cause it to flood and it should start when hot without touching the pedal, if everything else is working properly.
 
mobileaudio25 said:
I am running an electric choke, but it's easiest to start when I hold the pedal to the floor. Even when it's hot/cold

I had this problem on mine, turned out i needed the choke to be adjusted. Now i only have to hit the pedal once in the morning to set the choke and thats it! She starts first crank everytime! Just adjust your choke and you will be good
 
Agree with the above, very different car, but my wagon was a nightmare with the rebuilt carb on it to start, spent hours fiddling with the choke and now its starts first shot everytime.
 
mobileaudio25 said:
i have a 355 sbc with a .489/.476 lift cam with a duration of 287/317 and comp cams suggest running the timing between 35-38 and im around 37 right now. I only have a 9.4 compression motor as well. I was suggested a "budget starter." Its a china made gear reduction starter made in china that i paid $60 for, but multiple people have said they have good luck with them. I had the starter tested and it only pulls 35 amps. im using the 3 stock ignition wires and a 6ga wire from the battery. I am also running a jegs starter heat wrap around my starter. Does anyone have any clue or suggestions as to why it wont start once its up to engine temp?

by hot i mean up to temp (190)

Since you are listing things about the actual starter(brand,wrap,wire gauge) and everybody is talking choke,timing etc as the problem.
So is this a problem is where the car does not crank fast enough to start the car or does it crank fine and just won't start?
If it cranks fine they I would go with choke suggestions, timing is within range if it was set properly.
If it is the cranking issue the first thing I would change is use at least a 2 gauge from the battery to the starter but if you are running headers then I would add a remote starter solenoid set up and use 2 gauge or larger for that you can get those from Summit http://www.summitracing.com/parts/SUM-G1750/ or get something comparable.
You might have to extend your 3 wires going to the starter depending on mounting location of the solenoid but the advantage is it will cure a hot start problem and also there will only be the battery cable going from the solenoid to the starter and it only gets power when you crank it, the cable will have no power the rest of the time.
Plus another advantage of the remote solenoid is you can add power accessories to the positive side.
 
Your initial post says 6ga wire from battery. Are you referring to the actual pos battery cable? Waaay too small.
I have the same questions as 565bbchevy. I'm not sure if you are saying it's cranking(engine turning) but not starting or just not cranking at all.
 
DRIVEN said:
Your initial post says 6ga wire from battery. Are you referring to the actual pos battery cable? Waaay too small.
I have the same questions as 565bbchevy. I'm not sure if you are saying it's cranking(engine turning) but not starting or just not cranking at all.

x2
Most Napa stores can make any type/size/length cable you need. I recommend 0 or 1ga for ground and 2ga for positive cables.
 
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