|
|
|
|
| Author |
|
|
Unregistered
Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 55,652
|
LM-1, passed smog, very clean
I finally got around to getting the SC smogged after numerous setbacks. I've been playing with it off and on (mostly off) for 5 months now.
the engine wanted to run lean at idle and waaaay too rich under part throttle. No matter what I did it wouldn't clean up. I replaced the air box, no change. I installed a spare WUR I had, no change. I did the injector test, rerplaced the O2 sensor, you name it I tried it. I finally decided it must be a problem with the fuel distributor. Instead of replacing it, I hooked up the output signal of the LM-1 to the lambda brain and the mixture stayed rock steady at 14.6 to one. Smog readings? HC measured at 25, max allowable is 181 CO measured at .08, max is 1.36 NO measured at 468, max allowable is 1364 The smog tech said he's never seen an older car like this run that clean. Cool. Hopefully it won't raise a red flag for being too clean. As soon as I get the tags I'm gonna drive the wheels off this car again. Only thing is, the engine runs hotter now than it ever did because it was always a bit rich before. After about 20 minutes of idling the temperature got up to the 9 o'clock position. Never did that before. It cooled right down when I started driving it though. I never needed an additional cooler before but I may consider it now. 
|
||
05-12-2006, 10:46 AM
|
|
|
Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
|
Would there be any advantage to richening it up @ this point?
Say you just went to 1.36 CO, would you get any reduction in temps? .08 to 1.36 is a 1700% increase.
__________________
Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
||
|
05-12-2006, 11:43 AM
|
|
|
Formerly bb80sc
Join Date: Aug 2001
Location: Hollywood Beach, CA
Posts: 4,361
|
Sammy, what are your A/F ratios under WOT accelleration? I am seeing 15.5 at idle and 11.5 at WOT. I was wondering if you could hook a LM1 or PLX unit to the lamba brain.... glad you did it
 Do you have pics of the wiring you did? I only have one wire on the PLX which will feed a ECU. Also, did you use the wide band or narrow band lead?Thanks! -Brad
__________________
Cheers -Brad 2015 Cayman GTS 2015 4Runner Limited Last edited by Vipergrün; 05-12-2006 at 12:46 PM.. |
||
|
05-12-2006, 12:03 PM
|
|
|
Registered
Join Date: May 2004
Location: Encinitas (San Diego CA)
Posts: 4,495
|
Good info! AND congratulations!
Doug
__________________
1971 RSR - interpretation |
||
|
05-12-2006, 12:48 PM
|
|
|
Sports Purpose 911 Driver
Join Date: Mar 2002
Location: La Jolla, CA
Posts: 4,368
|
the second cooler is cheap insurance and given where you live traffic should be expected at times so you might want to give it some consideration. Kudos on your success.
__________________
James Shira R Gruppe # 271 1972 911 Coupe 3.8 RS ‘nbr two’ 1972 911 Coupe 3.2 TwinPlug MFI 'Tangerina-Jolie' 1955 356 Pre A Coupe ‘old red’ 1956 356A Emory speedster build in progress |
||
|
05-12-2006, 02:28 PM
|
|
