Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Labratt]
#871176
12/04/10 04:10 PM
12/04/10 04:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Randy you can use my LM-1 if you want... since you have a bung in already it would be easy... mine doesnt record to the unit but if you can see it you can get the number OR have someone read it 
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Labratt]
#871179
12/04/10 05:52 PM
12/04/10 05:52 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks guys! Mike,that would be great! Maybe I can get it when I bring my 6 "little buddies" over for a visit shortly! My biggest concern is the A/F ratio at idle! I'd like to see what settings would give it the leanest(cleanest)exhaust emission...and still be "safe" BTW...what is considered the "IDEAL" A/F ratio(on the idle circuit) on a car like mine? 13-13.5-1?  THANKS!  
In the 14s... thats a no load condition... just
enough fuel to give a nice clean idle... but then
again you have one of them there bumpy 3/4 race cams 
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Labratt]
#871181
12/04/10 06:15 PM
12/04/10 06:15 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks Mike! I want the plugs to look like the one on the right..even just idling around!..or is that a "pipe dream"? Actually, the cam's only an 11/16 street unit... Made more for docile street driving,than going fast!  
Ok... the one on the left looks both oil and fuel soaked
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: MR_P_BODY]
#871183
12/04/10 07:06 PM
12/04/10 07:06 PM
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Joined: Sep 2009
Posts: 2,325
Clinton Twp... north of Deetro...
Labratt
OP
Good Ol Randy B!
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OP
Good Ol Randy B!
Joined: Sep 2009
Posts: 2,325
Clinton Twp... north of Deetro...
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Quote:
Quote:
Thanks Mike! I want the plugs to look like the one on the right..even just idling around!..or is that a "pipe dream"? Actually, the cam's only an 11/16 street unit... Made more for docile street driving,than going fast!
Ok... the one on the left looks both oil and fuel soaked Mike..that's why I want it to look like the one on the right! Thanks for the info,Cory! I'm just wondering if I can get the idle cleaned up with just the IAB's...not having to change the idle feed restrictors? 
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Big Squeeze]
#871185
12/04/10 09:34 PM
12/04/10 09:34 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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i have tried carbs on my car that felt like monsters on the street but didnt do so hot at the track. depending on what you want out of your car, any testing not at the track or even a dyno would be a waste of time if your looking for the most HP out of your motor
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Labratt]
#871189
12/05/10 09:51 AM
12/05/10 09:51 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks,feller's! Nuther' question...when using the LM-1 or other equipment,should the ambient temperature be at a standard degree..like 72*???
No.... you would be setting the A/F for the conditions
at that time... will it change due to temp and BP...
yes.... but I usually change a jet size with every 25*
of ambient so the idle will move some also... I would
wait till at least spring(since you dont drive it in
the winter) that way you would be closer to the summer
temps and conditions
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: Labratt]
#871190
12/05/10 02:16 PM
12/05/10 02:16 PM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
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Posts: 16,923
NC
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I agree with Raff, the no load idle should be able to run close to Lambda=1.0 (stoichiometric), which on gas is 14.7 A/F. However, depending on the carb circuits, you may need a touch richer for throttle transition, etc.
Although I am running E85, I have leaned it out for no-load idle, and high idle around the pits at Lambda=1.0. This is primarily to put heat in the motor, but it is clean. However, my mechanical injection is much richer with the fuel valve in the full "ON" position for racing because of the simple way the system works.
Remember, the A/F numbers are just for reference when tuning. There is no magic number(s), just typical ranges like
idle 13.0-14.7
WOT 12.0-13.0
One of the nice things about recording A/F vs RPM is you can tune the fuel curve of your carb (air bleeds, jets, emulsion, etc). For example a carb at WOT might be 12.5 at 4000 rpm, but 11.5 (or 13.5) at 7000 rpm.
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: 440Jim]
#871191
12/05/10 02:54 PM
12/05/10 02:54 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I agree with Raff, the no load idle should be able to run close to Lambda=1.0 (stoichiometric), which on gas is 14.7 A/F. However, depending on the carb circuits, you may need a touch richer for throttle transition, etc.
Although I am running E85, I have leaned it out for no-load idle, and high idle around the pits at Lambda=1.0. This is primarily to put heat in the motor, but it is clean. However, my mechanical injection is much richer with the fuel valve in the full "ON" position for racing because of the simple way the system works.
Remember, the A/F numbers are just for reference when tuning. There is no magic number(s), just typical ranges like
idle 13.0-14.7
WOT 12.0-13.0
One of the nice things about recording A/F vs RPM is you can tune the fuel curve of your carb (air bleeds, jets, emulsion, etc). For example a carb at WOT might be 12.5 at 4000 rpm, but 11.5 (or 13.5) at 7000 rpm.
Jim maybe you would know.... is there a add on to
upgrade my LM-1 to record the data and rpm
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: MR_P_BODY]
#871192
12/05/10 03:04 PM
12/05/10 03:04 PM
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Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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Quote:
Quote:
I agree with Raff, the no load idle should be able to run close to Lambda=1.0 (stoichiometric), which on gas is 14.7 A/F. However, depending on the carb circuits, you may need a touch richer for throttle transition, etc.
Although I am running E85, I have leaned it out for no-load idle, and high idle around the pits at Lambda=1.0. This is primarily to put heat in the motor, but it is clean. However, my mechanical injection is much richer with the fuel valve in the full "ON" position for racing because of the simple way the system works.
Remember, the A/F numbers are just for reference when tuning. There is no magic number(s), just typical ranges like
idle 13.0-14.7
WOT 12.0-13.0
One of the nice things about recording A/F vs RPM is you can tune the fuel curve of your carb (air bleeds, jets, emulsion, etc). For example a carb at WOT might be 12.5 at 4000 rpm, but 11.5 (or 13.5) at 7000 rpm.
Jim maybe you would know.... is there a add on to
upgrade my LM-1 to record the data and rpm
as i understand it..YES you just need the software disc and a lap top..
i have a question:
my LM-1 has 2 sensors..what is the best location to install the bungs...
i have a 2-1 y/x pipe can i put a single bung in it or should i use both banks/bungs and sensors...?
cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
[image][/image]
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Re: LM-1....OR SIMILAR CARB TUNING EQUIPMENT???
[Re: cheapstreetdustr]
#871193
12/05/10 03:19 PM
12/05/10 03:19 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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as i understand it..YES you just need the software disc and a lap top.. i have a question: my LM-1 has 2 sensors..what is the best location to install the bungs... i have a 2-1 y/x pipe can i put a single bung in it or should i use both banks/bungs and sensors...? cheapst
Thanks I'll check into it... as for your sensor I
put them in about 4" to 6" past the end of the
primaries in the collectors... I only have 1 sensor
but 2 bungs and after I use the sensor on each bank
I pull it out and plug the bungs... you dont want it down
stream of any e-vacs or near any open air
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