Microtech tuning for better MPG?
#1
tuning for better MPG?
1st things 1st. My car:
LT-8 ECU
13b-RE Cosmo
60 trim T04E .96 a/r exhaust side
OBX manifold w/40mm wastegate
An actual 3" FULL exhaust (Y pipe is 3", not like others where it narrows)
double pass rad
my IC is approx 23"x15"x3.5" H-mounted
550cc Primaries, 1600cc secondaries.
and some other **** i forgot. The car is about 75% done.
now I searched and could not find anything about getting better MPG. I have had about 2 months of tuning experience (i'd tune before work, during lunch, and after work, every day) And I'd like to say I tuned the car pretty good until it blew (all my fault). But I am about to take a long road trip in this thing, about 1300miles worth, and would like to if you guys have any suggestions, tips, etc for a 'cruise' tune, or nething i could do to get better MPG. LMK thx
LT-8 ECU
13b-RE Cosmo
60 trim T04E .96 a/r exhaust side
OBX manifold w/40mm wastegate
An actual 3" FULL exhaust (Y pipe is 3", not like others where it narrows)
double pass rad
my IC is approx 23"x15"x3.5" H-mounted
550cc Primaries, 1600cc secondaries.
and some other **** i forgot. The car is about 75% done.
now I searched and could not find anything about getting better MPG. I have had about 2 months of tuning experience (i'd tune before work, during lunch, and after work, every day) And I'd like to say I tuned the car pretty good until it blew (all my fault). But I am about to take a long road trip in this thing, about 1300miles worth, and would like to if you guys have any suggestions, tips, etc for a 'cruise' tune, or nething i could do to get better MPG. LMK thx
#5
Originally Posted by FC_mania
how did u blow your engine?..........too much timing?
i think cruising afr near stoich should be good. with egt around 700-720 degree C
i think cruising afr near stoich should be good. with egt around 700-720 degree C
#7
woah 25psi on a 60-1.... didnt the microtech log tell you how much boost you are at?
i think u can turn on the decel and play with the rpmcrs to get some fuel economy but aint sure
i think u can turn on the decel and play with the rpmcrs to get some fuel economy but aint sure
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#8
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Originally Posted by RexRyder
now I searched and could not find anything about getting better MPG.
Originally Posted by RexRyder
BTW i do have a wideband, but its not installed yet, and I kno the ideal afr would be around 14.5
#9
Originally Posted by FC_mania
woah 25psi on a 60-1.... didnt the microtech log tell you how much boost you are at?
i think u can turn on the decel and play with the rpmcrs to get some fuel economy but aint sure
i think u can turn on the decel and play with the rpmcrs to get some fuel economy but aint sure
i was riding with a frend, he said he saw 25 psi on the laptop, (my gauge said otherwise). he also said it went from 0 to 25 psi in like a second, no progression
at all (i must have been at 5500-6k? in 3rd) im not sure if its a very fast spooling turbo, or the resolution on the microtech software sucks. part of the reason was because my wastegate was hooked up wrong too.
#10
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I am using the "matrix" mode and have it set up for maximun MPG at 65 MPH, 2500RPM and 10 hg (14.5 afr). If you are running "normal" mode, it can be set under "rcrs" screen as well.
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Originally Posted by stacher
I am using the "matrix" mode and have it set up for maximun MPG at 65 MPH, 2500RPM and 10 hg (14.5 afr). If you are running "normal" mode, it can be set under "rcrs" screen as well.
#16
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You can run well under stoich, the car will let you know when it is too lean. Alot of reason the cars run stoich at cruise from the factory and not leaner is to save catalytic converters.
Now, running the car leaner will increase your water and oil temps. The other problem is just general heat in the motor, you do not want to be cruising for 300miles at a lean afr and get the motor all hot then go flog it.
Personally I have gotten around 20mpg at 80mph with a blown motor, and even better with a healthy motor. I am currently looking forward to 27ishmg on a stock AC Delco ECU at 80+ MPH
Now, running the car leaner will increase your water and oil temps. The other problem is just general heat in the motor, you do not want to be cruising for 300miles at a lean afr and get the motor all hot then go flog it.
Personally I have gotten around 20mpg at 80mph with a blown motor, and even better with a healthy motor. I am currently looking forward to 27ishmg on a stock AC Delco ECU at 80+ MPH
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My car was happy with the techedge at about 15.5 - 15.7, it woudl start to lean surge around 16.0. The thing you REALLY have to watch is coming up onto boost and such with cruise this lean. I ran 2 maps a travel map and an in town map. My car was not a daily driver to around town milage didnt bother me and I ran my cruise around 13.7ish to keep the motor cool as if I was in the car, I was beating on it. On the travel map with the hellaciously lean cruise I richended up boost even more, took some timing out, gave it a little more fuel in the throttle pumps to try to combat the motor detonating from it having any hotspots in it from running lean.
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Originally Posted by FC_mania
i only can get 10-12mpg untuned now sigh.......
#20
nope its not a base map......i tuned it with my plx m500 and an egt.... i got better around 18mpg now with my cruise afr around 13 ish......boost is still untuned cause it still reads RICH hehehe....... oh well im happy =)
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I don't think I'll have the ***** to tune my own ECU yet. I got my friends LT8 to run pretty good till about 3000 RPM, but the staging was a little to tricky. I guess I need a bit more reading to do. I'll just leave it to Rolo to work his magic.
BTW: this is my next investment
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
BTW: this is my next investment
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
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