Thread: Desmog
View Single Post
  #25  
Old 02-07-2011, 03:16 PM
subzali's Avatar
subzali subzali is offline
Rising Sun member
 
Join Date: Aug 2005
Location: Denver CO
Posts: 7,632
Default

Not much to add, but after doing some more MUDsearch on various topics I found this post from Jim C.:
http://forum.ih8mud.com/40-55-series...tml#post974801

Quote:
Originally Posted by Jim C.
The bad systems, that hurt efficiency and/or reliability are:
EGR - GONE
AIR - GONE
HAC - DON'T HAVE IT ON MY '77
TP - STILL HAVE IT, I THINK IT'S GOOD TO NOT BACKFIRE OR HAVE THE ULTRA-RICH EFFECT FROM CLOSING THE THROTTLE PLATES UNDER HIGH VACUUM. I GUESS IT BURNS MORE FUEL BUT IT WILL MAKE THE EXHAUST SMELL BETTER
vac retard - GONE W/ '79-'80 DISSY

The good systems:
PCV - STILL HAVE IT
vac advance - MY '79-'80 DISSY IS VAC ADVANCE
Evap - STILL HAVE IT
Decel fuel cut - NOT SURE ABOUT THIS ONE
HIC - DO NOT HAVE IT SINCE I DON'T HAVE THE FITTING ON THE CARB BASE PLATE, BUT DON'T HAVE ANY ISSUES WITH HOT IDLE STUMBLING
Dissy vent - HAVE IT HOOKED UP CORRECTLY

That my $.015 (darn inflation).
Another one from Charlie:
http://forum.ih8mud.com/40-55-series...ml#post1640877

Quote:
Originally Posted by Pin_Head
...my opinion is that other than the EGR, ignition retard and air injection, the other stuff performs useful functions in maximizing performance and fuel economy under more different driving conditions. It is also electronic engine control. Simply disabling the EGR, retard and AI is sufficient and is a lot less work. It isn't worth the effort to remove it.
And then to address Steve's comment earlier, I also saw this:
http://forum.ih8mud.com/40-55-series...ml#post1061246

Quote:
Originally Posted by Jim C.
HAI is hot air intake. That's the preheat hose on the aircleaner snorkel on 73-newer Cruisers. W/ a stock exhaust manifold bolted to the bottom of the intake manifold, it is redundant. A useful accesory w/ headers, especially in cool climates.
I am actually planning on recreating my HAI shield and hose (missing when I got the truck) at some point, rather than pay SOR a bunch of money for a rusted out one. But since I have the stock exhaust manifold hooked up I'm probably fine for a little while, never have had a problem yet. I wonder how it's supposed to work with headers since the shield will have nothing to bolt to? I guess it just draws ambient air from near the header and that's close enough to help. Fluid heat riser helps too.
__________________
Matt Miller
TLCA# 13684
Rising Sun Bio
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD

Last edited by subzali; 02-07-2011 at 05:26 PM.
Reply With Quote