Holley 850 fat at lean cruise - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Sep 4th, 16, 02:18 PM Thread Starter
Senior Tech
Morgan
 
Join Date: May 2011
Location: Detroit
Posts: 940
Garage
Holley 850 fat at lean cruise

Holley 850 annular booster.
81 air bleeds and came with 37 idle feed restrictors, mixture screws out 1 1/8, idle is 13.5-14, lean cruise is 12.5, wot is 12.8. So I went with 34 IFR, mixture screws are now out 1 3/4, idle 14, lean cruise the same? WTH?

Lowered the floats, nc, any body have any other idea how to get the lean cruise above at least 13.5?

69 Copo 9560 ZL-1 automatic [email protected], 1.95 on f70-14 polyglas F.AS.T. Race June 2016
69 Copo 9560 ZL-1 4spd [email protected] 1.93 60ft on F70/14
PSMCDR 2014
71LS6 vette [email protected] PSMCDR 2012 SOLD
1971ls6 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Sep 4th, 16, 02:59 PM
Banned
Chet
 
Join Date: Apr 2014
Location: Oakland County
Posts: 1,353
Re: Holley 850 fat at lean cruise

What cam? Specs? New carb? Rebuilt? Holley gets them pretty darn close out of the factory as they flow test each carb.
onefiness is offline  
post #3 of 4 (permalink) Old Sep 4th, 16, 03:56 PM
Moderator
____
 
DOUG G's Avatar
 
Join Date: Mar 1999
Location: Maryland, USA
Posts: 19,441
Garage
Send a message via MSN to DOUG G
Re: Holley 850 fat at lean cruise

Timing made a good change for me when I was playing with my AFR gauge.

My IFR's are at 1/2-3/4 turn out
Closed the secondary's at idle (1/4 turn off seat so not fullyclosed/seated)
Played with my timing

All together added up to 13.8-14.5 @ idle once warm
Vacuum went up almost 2 points
Mid-High 12's @ WOT
Cruise is 14-15 depending on speed.

Mighty Demon 750 DP
73/85
6.5 PV
38 HSAB
Attached Thumbnails
Click image for larger version

Name:	AFR Limits.jpg
Views:	24
Size:	24.6 KB
ID:	159810  

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53

Last edited by DOUG G; Sep 4th, 16 at 04:10 PM.
DOUG G is offline  
 
post #4 of 4 (permalink) Old Sep 4th, 16, 07:05 PM Thread Starter
Senior Tech
Morgan
 
Join Date: May 2011
Location: Detroit
Posts: 940
Garage
Re: Holley 850 fat at lean cruise

Cam is 250's duration at .050, 560/580 lift 114 lobe, solid lifter, initial at 20, total @40 plus 10 degrees of vacuum advance

69 Copo 9560 ZL-1 automatic [email protected], 1.95 on f70-14 polyglas F.AS.T. Race June 2016
69 Copo 9560 ZL-1 4spd [email protected] 1.93 60ft on F70/14
PSMCDR 2014
71LS6 vette [email protected] PSMCDR 2012 SOLD
1971ls6 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user 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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome