Cam MPG Question.
Just because your AFRs are the same as stock, doesn't mean it's the same fuel usage.
A 800rwhp twin screw car has the same 14.8-15.3 AFRs as stock...does it mean it's going to use the same amount of fuel? Nope because it has more air and thus more fuel.
A bigger duration/higher lift cam will allow more air in the cylinder each intake stroke, thus it will require more fuel to attain the same stoich AFR, so it will use more fuel.
How you use the power created by that is going to have a bigger impact on overall fuel efficiency, but all in all a cammed car will use more fuel per stroke than a stock cam car.
A 800rwhp twin screw car has the same 14.8-15.3 AFRs as stock...does it mean it's going to use the same amount of fuel? Nope because it has more air and thus more fuel.
A bigger duration/higher lift cam will allow more air in the cylinder each intake stroke, thus it will require more fuel to attain the same stoich AFR, so it will use more fuel.
How you use the power created by that is going to have a bigger impact on overall fuel efficiency, but all in all a cammed car will use more fuel per stroke than a stock cam car.
That is surprisingly low. I would think with a M6 you'd be well over 20 on the highway.
Never said it was the same. I was suggesting that it helps.
It's harder on valvetrain turning 1700rpm and the resonating from my duals is enough to make my head go numb. Its not a fear, i dont like doing it and i like passing power without downshifting constantly. I've only put 3 tanks through the car with this setup so I'm not going to call the tuner just yet. The car will get over 20 I feel it should see 23 at least if I try for it. That 18 tank wasn't complete highway either. I don't see city getting much better then 15-16.
Valve clatter and noise of valves slapping open and closed. Maybe it just hurts my ears.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
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From: Middletown, DE
By the way guys, its about 80% highway or 55+ speed limits. I live in Delaware, so very little to no city driving. Im averaging at ~19.1 mixed right now and I do not have the best foot lol. Would any of you recommend getting a 91 octane tune when I get the cam in or should I stick with 93?
Valve clatter and noise of valves slapping open and closed. Maybe it just hurts my ears.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
I feel you. My converter locks at 50 mph. With my gears, it drops to an insanely low rpms. Like 1200. Had to pull some timing out. Car wont accelerate with any power there. It still gets some kr if I lean into it.
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I honestly love it, it pulls hard all the way to 6800rpm. I know i've been slacking lately but I plan to throw it on the dyno soon and maybe some track times. Over the weekend I broke my FLT 4l60e so hopefully Ill get that fixed quickly and possibly a bigger convertor. Thanks for everything Martin!
Valve clatter and noise of valves slapping open and closed. Maybe it just hurts my ears.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
My car in 6th gear with stock gear turns 1500rpm at 65...that's fine if you guys like to cruise at that rpm I don't. On long trips i'd hold out 6th but normally i don't use it until 65-70mph.
Like they say: Mileage will vary...i also have a lead foot and prefer not to bog down the motor. It has zero pull at that rpm i like my power.
My car would regularly get 24-26mpg highway with bolt ons, and around 18 city. It took a hit, just about every car will take a hit with a cam swap...if you guys want to continue arguing that it's fine.
No one is arguing man, just discussing each others combos
I feel you. My converter locks at 50 mph. With my gears, it drops to an insanely low rpms. Like 1200. Had to pull some timing out. Car wont accelerate with any power there. It still gets some kr if I lean into it.
I feel you. My converter locks at 50 mph. With my gears, it drops to an insanely low rpms. Like 1200. Had to pull some timing out. Car wont accelerate with any power there. It still gets some kr if I lean into it.
I should be able to get better mpg out of the car i'll post up next road trip i do. It's rare i get a complete highway tank out of it. Also lots of elevation changes where i live.
Also thinking about swapping in 4.10s, might be too much.. i wish i had a 3.73s laying around. The 6th gear is so long in these trans. I hate the 5-6 shift they are so spread out.
14-15 in town, about 20 on the highway running 75-80. 6.0, t56, cnc ported 241s and Pat G nitrous cam (large), fast 90/90, 36lb injectors, 12-bolt with 3.73's and 18x10.5's and 315/30's all around. Haven't really checked mileage lately since I've been running the big/littles but a mix of highway (some 0-130 sprints) and in-town, I got 255 miles before I had to fill up, so about 17-18 
