Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> sbc 350 cranks slow when hot
User Name
Password
lost password?   |   register now

Thread: sbc 350 cranks slow when hot Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
09-14-2012 04:21 PM
the82elco
Quote:
Originally Posted by Choctaw Bob View Post
Look at what appear to be terminals. The big one should be hot or positive. The others could be marked ground and field.
Problem Solved thanks for the help! no more slow cranking
09-14-2012 02:51 PM
the82elco
Quote:
Originally Posted by dogwater View Post
I had the same problem,what I did is I wrapped my headers,mainly to get rid of under hood heat and I chunked the overly large Chevy starter an replaced it with a 4.3 v6 starter.No more starting problems.I shaved off 9 1/2 lbs. with the starter change.My battery is in the trunk,run your ground wire to a tail shaft housing bolt if your using an auto trans.
And the more bigger the wire the more gooder.....
what kind of car did u get the the starter from?
09-14-2012 07:37 AM
dogwater I had the same problem,what I did is I wrapped my headers,mainly to get rid of under hood heat and I chunked the overly large Chevy starter an replaced it with a 4.3 v6 starter.No more starting problems.I shaved off 9 1/2 lbs. with the starter change.My battery is in the trunk,run your ground wire to a tail shaft housing bolt if your using an auto trans.
And the more bigger the wire the more gooder.....
09-14-2012 12:04 AM
Choctaw Bob
Quote:
Originally Posted by the82elco View Post
does my alternator need a ground?
Look at what appear to be terminals. The big one should be hot or positive. The others could be marked ground and field.
09-13-2012 09:29 PM
Choctaw Bob
Quote:
Originally Posted by the82elco View Post
does my alternator need a ground?

Look at your documentation. it could be in the plug hole or one of the unoccupied posts or it may ground to the case.
09-13-2012 07:17 PM
the82elco
Quote:
Originally Posted by Choctaw Bob View Post
If you search ground cable on Jegs, you will see that all are #2 gage.
does my alternator need a ground?
09-13-2012 04:02 PM
F-BIRD'88 ALL these things are very important. Once you have corrected ALL these areas that effect starter motor performance you can also install a simple ignition power interupt toggle or pushbutton switch on the dash to allow you to disable the spark momentarily for hot starting. This removes the cranking load on the starter allowing you to crank over and purge the intake manifold of over heated over rich air fuel that will not burn.
This is why a hot motor needs to crank for a longer time to start.
Once a fresh air fuel mix is drawn to the intake manifold the motor will start instantly.

Kick it over 1- 2- 3 count and throw the switch. pretty simple.

Make sure the GM OEM rear starter motor bracket brace is installed. The two bolts alone are not enough to support the GM starter motor.
This is not a replacement for correcting the other issues grounding, heat shield etc.
09-13-2012 03:53 PM
Choctaw Bob
Quote:
Originally Posted by the82elco View Post
one more thing what size ground wire to get?
If you search ground cable on Jegs, you will see that all are #2 gage.
09-13-2012 03:45 PM
the82elco
Quote:
Originally Posted by Choctaw Bob View Post
And don't forget when you clean the battery terminals, check the cables inside the insulation a few inches from the terminals. Corrosion has a way of sneaking up the cables and causing damage you can't see.
one more thing what size ground wire to get?
09-13-2012 02:29 PM
Choctaw Bob And don't forget when you clean the battery terminals, check the cables inside the insulation a few inches from the terminals. Corrosion has a way of sneaking up the cables and causing damage you can't see.
09-13-2012 02:21 PM
the82elco
Quote:
Originally Posted by DoubleVision View Post
Since I've did many performance builds with headers and high compression and never had any starter issues says to me the chevy starter has no issues with doing the job, however it's important it be did right. Before you do anything first off, and this is vital, Improve the grounds. If you've got what I've seen on the majority which is ground cable going to alternator bracket that ain't gonna cut it. Run the ground directly to the block. Make sure where you connect it on the block is sanded down to it makes a excellant contact. Next run another ground from the block to the frame and again, make sure it's getting a good connection. If there are factory ground straps hanging around unused from the firewall reconnect them.
Next, get the vehicle on a set of ramps and torque the starter bolts to 35 ft lbs.
This is what I've did on each build I've did and none give me any problems. What made me start doing it this way? Before I did it my car ate a total of Eight starters and I'd decided enough is enough.
When you improve the grounds you'll notice everything in the electrical system will work better.
THANKS i will definitely do ^^
09-13-2012 01:38 PM
lg1969 Also check if battery ground is bolted solid to the engine block and there is no corrosion around the lug of the ground cable and battery terminal and the cable itself. Like oldchevy1956 wrote, you need a "good solid ground" connection. Make sure the battery does not have a dead cell.
09-13-2012 01:14 PM
oldchevy1956 I definitely agree that the initial solution could be a heat issue and there are a few solutions already listed above, but I also have seen ground issues cause this too. Getting a good solid ground to the block is very important, as already mentioned, for good starter activity when hot, and I have even gone as far as running a 4 gauge or 6 gauge gound wire directly to the starter.
09-13-2012 12:33 PM
lg1969 A starter kit will not improve the cranking when it's hot. It only good when the soleniod will not engauge because of a hot engine heating the soleniod.
You need a super high torque mini starter to make it crank faster. Also check the battery charge volt it should read 14 to 14.5 volts when running.
09-13-2012 12:24 PM
DoubleVision Since I've did many performance builds with headers and high compression and never had any starter issues says to me the chevy starter has no issues with doing the job, however it's important it be did right. Before you do anything first off, and this is vital, Improve the grounds. If you've got what I've seen on the majority which is ground cable going to alternator bracket that ain't gonna cut it. Run the ground directly to the block. Make sure where you connect it on the block is sanded down to it makes a excellant contact. Next run another ground from the block to the frame and again, make sure it's getting a good connection. If there are factory ground straps hanging around unused from the firewall reconnect them.
Next, get the vehicle on a set of ramps and torque the starter bolts to 35 ft lbs.
This is what I've did on each build I've did and none give me any problems. What made me start doing it this way? Before I did it my car ate a total of Eight starters and I'd decided enough is enough.
When you improve the grounds you'll notice everything in the electrical system will work better.
This thread has more than 15 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 04:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.