Your donations help keep this valuable resource free and growing. Thank you.
|
holley fans pls. read |
Post Reply | Page <123 |
Author | ||
bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4416 |
Post Options
Thanks(0)
|
|
chris--two idle mixture screws per carb, not four. it's a 4160 with secondary metering plate.
|
||
1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
||
ccowx
AMC Addicted Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510 |
Post Options
Thanks(0)
|
|
You can do one mixture screw per barrel. Might help, since mixture is always an issue with a Cross ram.
|
||
Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7901 |
Post Options
Thanks(0)
|
|
|
||
Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6749 |
Post Options
Thanks(0)
|
|
Vacuum secondary's would actually work well, but they have to be teed together and use the same vacuum source. Not going to get the same acceleration as mechanical though.
Mechanical secondary's work, but do tend to work better if your tendency is to floor it. Not so good at smooth transition with partially opening. I'm assuming we dealing with a lead foot here:)
|
||
bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4416 |
Post Options
Thanks(0)
|
|
my foot's so heavy i think it's made of lead!!
|
||
1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
||
bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4416 |
Post Options
Thanks(0)
|
|
so, here's a twist in this issue:
take a look at roadventure's post. i'm wondering if it will make a diff. if i do what he did. currently, i have a pcv in a baffle, located in the valve cover. a hose connects it with the back of the two carbs (using "t's"). i could do the same thing by plugging the ports exiting the back of the carbs and running the pcv valve directly to the air cleaner housings where they go up inside of the air cleaner elements.
|
||
1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
||
bikerfox
Moderator Group Joined: Aug/02/2009 Location: USA Status: Offline Points: 4416 |
Post Options
Thanks(0)
|
|
ss--hey, no harm no foul....i knew we were getting "lost in translation."
|
||
1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
||
Finis
AMC Fan Joined: Jun/08/2019 Location: Dayton, Mn Status: Offline Points: 2 |
Post Options
Thanks(0)
|
|
My experience wwith my crossram was revealing. I started with 1850s and always had idle issue. Was warned about idle issues with these. My vacuum at idle was 5 inches 1200 rpm. if it fell below 5 it woud kill. Tried cracking the secondaries, help some, drilled the blades but alway low idle vacuum. Finally ordered a new valley pan gasket and removed the intake. I measured the new pan seal surfaces and compared that to the removed one and discovered the seal surfaces along the top were not crushing. i placed the intake onto the motor and measured with feelers front to back both top and bottom, both sides. Not square and not parallel. next I used my carpenter square and could see the issues. I warned my machinist we would proceed slowly. After two trip the manifold sit evenly on the motor with .002 variacion. The end result was 8 inches of vacuum and 1000 rpm. Steady. I did finally go to Quickfuel 450 cfm vacumm secondarys. far more adjustability.
|
||
Finis
AMC Fan Joined: Jun/08/2019 Location: Dayton, Mn Status: Offline Points: 2 |
Post Options
Thanks(0)
|
|
Btw, my cam is 255, 266 duration with a 106 lobe separation. This coupled with alot of plenum, I'm happy with this idle.
|
||
Post Reply | Page <123 |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |