Yea i know odd ball question on this web site.
My first car was a '69 lemans, 350cid, Rochester carb (4bbl), 10.5 : 1 cmpression & a ten bolt posi rear. - Those days are long gone for me but the memories will last forever!!!!
So? Any tunes or tricks from the obviouse you know of & or are using, shout out..
Fred Hubbard
it can easily be done in the computer tuning, but most tune for performance.
1997 Cavalier Z24 - 15.647 @ 88.02 MPH
there have been a few people looking for more ecomony, and a few helpful threads around if you are looking to do so.
Computer tuning will indeed help, but there are other things you can do to increase fuel economy as well.
They all can be tailored to the type of driving you do mostly.
Well I'm a performance person. I want the most performance I can get from my car. After tuning my Air/fuel I actually gained MPG in my car. Really every mod I have done to my car has help, and not hurt gas mileage (except for when I lay into it). Even when I play my MPG is good. It is all about having a efficient running motor and car.
FU Tuning
One of the easiest things i've found is to figure out where you sit in your tables when you're normally at a cruising speed. There you can turn your fuel back to a leaner A/F ratio and have it instantly add more fuel when you give it more throttle. The computer can instantly change injector pulsewidth and go back to where it needs to be for increased loads and such. Though, that's only really good for highway cruising.
mine went done a bit in town becuase when im under 70ish km/h, its still in 3rd gear rather than the auto up shifting to 4th. the reason for leaving it in third is to not ave to downshift the tranny when i want to go a little faster when cruising around town. on the highway, the car sips gas much better than before.
1997 Cavalier Z24 - 15.647 @ 88.02 MPH
I managed 35 mpg today on a 50 mile trip, I plan on tuning it a tad bit more since I haven't altered my tune since last year sometime.
i do it, Im getting 37-42 highway in a modded cobalt ss
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Rodimus Prime wrote:i do it, Im getting 37-42 highway in a modded cobalt ss
Nice. I have been thinking about tuning for some better mpg.
2004 Cavalier. Razzi. (Sold)
1998 Corvette. Some mods.
1992 Typhoon. Lots of mods.
1994 Civic VX 44MPG
Admiral Jedi wrote:^ Where around here will tune?
I have some friends with HPtuner. I am also going to be buying it soon. Performance garage "may" be using it some, but not sure. I think that guy was using LT1 and LS1 edit at one time.
2004 Cavalier. Razzi. (Sold)
1998 Corvette. Some mods.
1992 Typhoon. Lots of mods.
1994 Civic VX 44MPG
I know I get roughly 30-32mpg highway w/ mine, and that was sheer accident, I just tuned it for good afr's and the decent mpg's were the by product, city I see about 27 or so.
As for rodimus gettin that outta a css...DAMN!!!!!!!!!!!!!!!!
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Many you guys are lucky. I get around 15 in the city and 17 on the highway with a turbo cavalier running E85. Before the ethanol i was only getting 22 city and 25 highway on premium. Those measurements were takin while i was being "easy on the gas"
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www.bradsairsoft.com
Some how I get 40-45mpg with my motor swap dyno tuned lol. Best MPG to date was 280 miles on 6 gallons of gas. Not bad having a low 14 second 45mpg car lol
3400 SWAP DONE. 187WHP 212TQ (14.2 @100MPH NA) 240WHP 310TQ (N2O)
Nice. I get 33-37 in my completely stock car. Wouldn't mind getting 40.
2004 Cavalier. Razzi. (Sold)
1998 Corvette. Some mods.
1992 Typhoon. Lots of mods.
1994 Civic VX 44MPG
Rodimus Prime wrote:i do it, Im getting 37-42 highway in a modded cobalt ss
I just have to laugh at the
you spew. EPA estimates for a 2006 cobalt ss sc are 23 city and 29 highway.
Nitrous Nate wrote:Some how I get 40-45mpg with my motor swap dyno tuned lol. Best MPG to date was 280 miles on 6 gallons of gas. Not bad having a low 14 second 45mpg car lol
You do not get 40-45 mpg highway. You either do not know how to accuratly figure your gas milage or you are full of @!#$ too.
Figuring your mpg is not that hard. Step one fill your gas tank completly full until the pump automaticaly clicks and stops. Step 2 before you pull out of the parking lot reset your trip meter. drive until your car is low on gas. Fill up again until it clicks. Right your trip milage on your receit and then divide the number of miles by the number of gallons. So for example (I am making up numbers just for demonstration) if your trip said 280.6 miles and your number of gallons you put in was 12.573. You would divide 280.6 divided by 12.573 = 22.317664 or for short 22.3mpg.
On average 21-22 is what my car gets in the city.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
when you have htuners......its easier to make it get alot better as mileage
swapped, supercharged, intercooled, 2.9, fun
Snowman wrote:when you have htuners......its easier to make it get alot better as mileage
True but NOT 8-13mpg worth as Rodimus stated or more even yet as Nitrous Nate stated.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
It is very possibly don't doubt their numbers.
During hwy cruise I am at an afr of approx. 14.8:1-15.3:1 at about 8% throttle. Having boost makes it easier to cruise without less load. less load = less gas.
Thats what people on the org don't understand they swear up and down that boost makes your gas mileage decrease when it really it doesnt, as long as you keep your foot off the gas pedal.
and yes hpt can give you over 8 mpgs very easily, seeing as the gm stgII tune runs pretty rich.
Same with Nate, His power to weight ratio plays a role just as boost would. He can cruise at a lighter load hence using less gas.
K. Vega..Mr. M62 L61 himself. wrote:It is very possibly don't doubt their numbers.
During hwy cruise I am at an afr of approx. 14.8:1-15.3:1 at about 8% throttle. Having boost makes it easier to cruise without less load. less load = less gas.
Thats what people on the org don't understand they swear up and down that boost makes your gas mileage decrease when it really it doesnt, as long as you keep your foot off the gas pedal.
and yes hpt can give you over 8 mpgs very easily, seeing as the gm stgII tune runs pretty rich.
Same with Nate, His power to weight ratio plays a role just as boost would. He can cruise at a lighter load hence using less gas.
I bet the gm tune is rich when you get on it but not during highway cruising. I am not arguing that hpt can not be used to help gas milage. I am simply saying NOT 8-13mpg worth.
The argument that boost makes it more efficent is easy to make on a turbocharged car since turbo's do not have any parasitic loss like a supercharger does.
As for Nate. Think about it he added weight to his car when he put in the 3400 not to mention it was never a great engine for fuel efficeincy. He is using more gas just idleing than a 4cyl would. There is no way in hell he is getting 40-45 mpg highway.
I am running Shifted's tune on my car. I have recently data logged on the highway so I know all about engine load.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
no when you enter any levels of boost, it runs rich. The stg II sits balts at approx. 15 psi. you can make about 12 psi 50% throttle on the balts if I remember correctly so your entering boost at pretty low throttle levels with stg II.
and trust me I bet I get better gas mileage than half the turbocharged ecos on here, why? because they are either running an fmu or the gm reflash aka rich city. Parasitic loss is a good point but isn't a problem in this situation when you have an impeller constantly spinning creating the swirl effect you want right at your manifold for better efficiency and assisting you with acceleration at low throttle points.
parasitic loss might play a major factor in my city mpg vs a turbo eco's mpg.
Good point with nate's car though I didn't take that into consideration with the added weight and all.
I say we should make a MPG post for the whole org, unless there is one that I missed....
My moms Cobalt SS S/C gets 36 MPG on the highway and my 98 Z24 gets 38.5 MPG on the highway. It all depends on how you drive the car. I have always been able to beat the EPA numbers for my cars.
mitdr774 wrote:My moms Cobalt SS S/C gets 36 MPG on the highway and my 98 Z24 gets 38.5 MPG on the highway. It all depends on how you drive the car. I have always been able to beat the EPA numbers for my cars.
Very true Clyde... Driving habits have a lot to do with it..
P&P Tuning
420.5whp / 359.8wtq
I have limited my fun to very few times a week. I usualy shift by 2500-3000 RPM and my cruise speed on the highway is 60 MPH. It helped dramaticly. It adds a little to my drive time but helps a lot at the pump. I also stay in the "slow" lane unless im passing someone. Even when my 02 was S/C I could pull off 25 city if i drove it right, bu that was boring ass drive.
ALthough a tune that would allow for an additional 5 MPG without hurting normal driving or the engine would be awesome.
I've actually managed 29 mpg on a fairly aggressive ride, cruising at 80 and 3 wot pulls and two of those were 2nd thru 4th.
Normally I cruise at 60ish and usually get about 34-35.
