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  #11  
Old 08-08-2017, 05:34 PM
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Originally Posted by GregWeld View Post
I thought this car was pro built?
[email protected]$KING BALL BUSTER!
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  #12  
Old 08-08-2017, 05:42 PM
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We ruled out vapor lock. Nothing comes close to any heat . When the car starts its a monster . The throttle response is crazy ,idles like a dream. Josh at RS put us in the right direction. Will let you know how it works out .
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  #13  
Old 08-09-2017, 12:24 PM
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This is a simple tuning issue. The combination of IAC Park and cranking fuel are what determines starting AFR. There is also a Fuel Prime adjustment in the System ICF. Fiddle around with those parameters until you get to what it likes. I find cranking fuel values just above fuel table values in the idle area work best for hot start. Then adjust IAC park accordingly. You can also fiddle with cranking spark advance, but I'd leave that as last resort.

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Old 08-10-2017, 09:28 AM
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I have been following this thread but am only familiar with FAST XFI systems.
Based on your hot start issue, i believe Andrew nailed your issue.
I would first ensure you have the specified fuel pressure with key on, engine off.
Then work on your "cranking fuel" which controls air/fuel ratio below roughly 400rpm.
Then IAC park position should be tuned to ensure it is opening enough.
Just curious, are you throttling the gas pedal during cranking to get it to start when it is hot? Does it help? That could be an indication that Andrew is on the right track.
Please let us know what you find out
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Old 08-11-2017, 12:15 PM
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Originally Posted by 572Camaro View Post
I have been following this thread but am only familiar with FAST XFI systems.
Based on your hot start issue, i believe Andrew nailed your issue.
I would first ensure you have the specified fuel pressure with key on, engine off.
Then work on your "cranking fuel" which controls air/fuel ratio below roughly 400rpm.
Then IAC park position should be tuned to ensure it is opening enough.
Just curious, are you throttling the gas pedal during cranking to get it to start when it is hot? Does it help? That could be an indication that Andrew is on the right track.
Please let us know what you find out
Will do ! Andrew is on the right track. I don't touch the pedal when I start it.
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Old 09-04-2017, 09:32 AM
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Hey DOOM, just curious..,
Any progress?
Just want to help and see if your "cranking fuel" adjustment fixed your hot start issue.
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  #17  
Old 09-06-2017, 04:28 PM
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Originally Posted by 572Camaro View Post
Hey DOOM, just curious..,
Any progress?
Just want to help and see if your "cranking fuel" adjustment fixed your hot start issue.
We just got it all figured out! It turns out that my distributor is locked out. I don't have any mechanical advance on my car at all. So with that being said my car is trying to start at 38 digress total advance. Causing the starter kick back.MSD makes a Starter Saver that retards the timing 10 -20 digress . It works like a charm . We just literally got it done today !
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Last edited by DOOM; 09-06-2017 at 04:31 PM.
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  #18  
Old 09-06-2017, 05:18 PM
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DOOM, CONGRATULATIONS!!!!!

Time to cruise!

By the way, I shredded my starter and flexplate about two years ago in my 572
68 Camaro. Having accidentally too much timing advance during cranking, it backfired through the intake while cranking and destroyed several flexplate teeth. And of course, it had to happen at a car show with everybody watching.

Here's my point: You are lucky. I was not. I experimented with "cranking timing" and found 18 degrees advance to work the best for me.

Again, sincere congratulations!
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Old 09-09-2017, 08:40 AM
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Quote:
Originally Posted by 572Camaro View Post
DOOM, CONGRATULATIONS!!!!!

Time to cruise!

By the way, I shredded my starter and flexplate about two years ago in my 572
68 Camaro. Having accidentally too much timing advance during cranking, it backfired through the intake while cranking and destroyed several flexplate teeth. And of course, it had to happen at a car show with everybody watching.

Here's my point: You are lucky. I was not. I experimented with "cranking timing" and found 18 degrees advance to work the best for me.

Again, sincere congratulations!
I actually had to replace the starter bolts on mine ! I knew this wasn't right so I would start the car by just bumping the ignition to help keep it from happening until we got it corrected.
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  #20  
Old 09-09-2017, 10:14 AM
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Even I didn't have my distributor locked out on my solid roller big block. With the right bushing and springs, you can achieve similar results to the module and plenty of initial advance. The same GM mini starter lasted the entire time I had the car.
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