Slow start when hot.

This has plagued my car since the new motor and I've just ignored it. Now that I've remembered to ask about it, what usually causes this? I had the battery in the trunk, then moved it back to the front hoping that would cure the hot starting problems, but its still there. I'm running an Optima red top battery, and a high torqe starter. Do I have a bad ground? Or the starter need a heat shield.
thanks for you advise.

[addsig]

Too much timing at idle, back it off a little bit and see if that helps. You could also try a heat shield for the starter, it might be getting too hot. I run about 16-18 degrees timing at idle and when it is hot, it almost doesn't crank over.
[addsig]

I'd look at all the grounds including the engine ground strap. My truck almost wouldn't start when the starter went south but the Optima got me another 6 month out of it. My race car had the distributor locked (no advance) and at 38 degrees & 180 on the temp guage started right up.
[addsig]

One thing that is overlooked and very simple to correct is the solenoid to starter cable diameter. Try a larger size. As a test you can use a jumper cable from the solenoid to the starter post. I had a 67 with a 428 that used a "0" custom cable. It started fine. The cables can be made from most farm or implement dealers stock. It usually works to end hot start problems.

<font size=-1>[ This Message was edited by: 1970galaxie on 1/27/04 1:31am ]</font>

thanks guys for your suggestions.
Any more? Keep em' coming.
I did replace the original ground strap that attached to the passenger side cylinder head to the firewall when i did the motor swap, maybe it is a POS. One of those braided looking things. Could i use something else here?
The cable from the solenoid to the starter is new, but it's certainly not "0" guage.


[addsig]

I started running a ground cable from a bolt under the alternator near the pan (lots of time it's grounded to the block there) to the frame at the sway bar or a nut welded to the frame rail. I just don't trust a sheet metal screw in the firewall to do the job. It wouldn't hurt to have a specialist go through the starter either. I had mine gone through last year and it made it run like new.
[addsig]

As I've said many, many times before on ANY kind of electrical problem/concern.
You can NEVER have too MANY grounds.
Body to frame, body to engine, engine to body, rear of body to frame, etc, etc, etc.
Between known GOOD grounds, and a good size acceptable POS cable, (both from batt to solenoid, and solenoid to starter, all else being good, you should have no starting concerns.
Now, with this being said, for sure, if your timing is way too advanced, you might experience warm kickback/hard start.

Good luck, have fun. [img]/phpBB/images/smiles/icon_wink.gif[/img]
[addsig]

Timing its timing. Been there done that got the t-shirt.