...

Go Back   Lateral-g Forums > Technical Discussions > EFI and Forced Induction
User Name
Password



Reply
 
Thread Tools Display Modes
  #11  
Old 08-08-2017, 05:34 PM
DOOM's Avatar
DOOM DOOM is offline
Lateral-g Supporting Member
 
Join Date: Jan 2007
Location: South Side Chicago
Posts: 2,894
Thanks: 7
Thanked 64 Times in 40 Posts
Default

Quote:
Originally Posted by GregWeld View Post
I thought this car was pro built?
F@$KING BALL BUSTER!
__________________
Mario
USCOLLISION
Reply With Quote
  #12  
Old 08-08-2017, 05:42 PM
DOOM's Avatar
DOOM DOOM is offline
Lateral-g Supporting Member
 
Join Date: Jan 2007
Location: South Side Chicago
Posts: 2,894
Thanks: 7
Thanked 64 Times in 40 Posts
Default

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 .
__________________
Mario
USCOLLISION
Reply With Quote
  #13  
Old 08-09-2017, 12:24 PM
andrewb70's Avatar
andrewb70 andrewb70 is offline
Lateral-g Supporting Vendor
 
Join Date: Jul 2005
Posts: 851
Thanks: 209
Thanked 441 Times in 200 Posts
Default

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.

Andrew
Reply With Quote
  #14  
Old 08-10-2017, 09:28 AM
572Camaro's Avatar
572Camaro 572Camaro is offline
Senior Member
 
Join Date: Nov 2016
Location: Central Missouri
Posts: 269
Thanks: 253
Thanked 129 Times in 76 Posts
Default

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
Reply With Quote
  #15  
Old 08-11-2017, 12:15 PM
DOOM's Avatar
DOOM DOOM is offline
Lateral-g Supporting Member
 
Join Date: Jan 2007
Location: South Side Chicago
Posts: 2,894
Thanks: 7
Thanked 64 Times in 40 Posts
Default

Quote:
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.
__________________
Mario
USCOLLISION
Reply With Quote
  #16  
Old 09-04-2017, 09:32 AM
572Camaro's Avatar
572Camaro 572Camaro is offline
Senior Member
 
Join Date: Nov 2016
Location: Central Missouri
Posts: 269
Thanks: 253
Thanked 129 Times in 76 Posts
Default

Hey DOOM, just curious..,
Any progress?
Just want to help and see if your "cranking fuel" adjustment fixed your hot start issue.
Reply With Quote
  #17  
Old 09-06-2017, 04:28 PM
DOOM's Avatar
DOOM DOOM is offline
Lateral-g Supporting Member
 
Join Date: Jan 2007
Location: South Side Chicago
Posts: 2,894
Thanks: 7
Thanked 64 Times in 40 Posts
Default

Quote:
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 !
__________________
Mario
USCOLLISION

Last edited by DOOM; 09-06-2017 at 04:31 PM.
Reply With Quote
  #18  
Old 09-06-2017, 05:18 PM
572Camaro's Avatar
572Camaro 572Camaro is offline
Senior Member
 
Join Date: Nov 2016
Location: Central Missouri
Posts: 269
Thanks: 253
Thanked 129 Times in 76 Posts
Default

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!
Reply With Quote
  #19  
Old 09-09-2017, 08:40 AM
DOOM's Avatar
DOOM DOOM is offline
Lateral-g Supporting Member
 
Join Date: Jan 2007
Location: South Side Chicago
Posts: 2,894
Thanks: 7
Thanked 64 Times in 40 Posts
Default

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.
__________________
Mario
USCOLLISION
Reply With Quote
  #20  
Old 09-09-2017, 10:14 AM
Vegas69's Avatar
Vegas69 Vegas69 is offline
Senior Member
 
Join Date: Dec 2006
Posts: 8,663
Thanks: 86
Thanked 210 Times in 119 Posts
Default

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.
__________________
Todd
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -5. The time now is 08:11 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright Lateral-g.net