Heads/cam 5.3. How bad will my gas mileage be?
Jun 20, 2011 | 08:28 PM
#11
Thread Starter
Staging Lane
Joined: Jun 2011
Posts: 71
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Think I could get 16? lol Give me some hope here!
Last edited by seh6183; Jun 20, 2011 at 08:40 PM.
Jun 20, 2011 | 09:01 PM
#15
I NEVER saw 16mpg even when I was bone stock. My truck has all the bolt ons you can put on it besides a different intake manifold.and i havejust a decent sized cam. I got around 14mpg bone stock with a tune and 4:10 gears. I saw 13.2 mpg with current mods and a 3200 stall. I went to a much looser 3800 stall and dropped to 11.8-12mpg
Jun 20, 2011 | 09:24 PM
#16
This would be possible in vette or gto but our trucks are too dam heavy....if you want the power you will pay at the pump
Jun 20, 2011 | 09:34 PM
#18
You might be able to get 16city but not likely. Like stated above, these trucks are too damn heavy for good city gas mileage. Maybe a RCSB, with gears and a tune not ever getting over 2500rpms and locking the converter at 30mph will get 16mpgs
If you want an LS motor and good city gas mileage, Don't get a truck. Hate to kill your buzz man
If you want an LS motor and good city gas mileage, Don't get a truck. Hate to kill your buzz man
Jun 21, 2011 | 01:24 AM
#19
It takes fuel to make power. It doesn't come from the air....
If you want more power, it takes more fuel. Of course efficiency is part of the equation, but that only goes so far. The basic rule here is power = fuel in one form or another. Power adders cram additional air into the cylinder, the PCM/tune adds the needed fuel to keep everything happy.
You could bump up your compression ratio. That adds power no matter what the combo. Even stock(who the hell would do that though).
On my combo, my gear swap from 3.73 to 4.10 took me from 19.5 hwy to 15 hwy mpg's. I don't ever measure city driving, but aftermarket torque converters typically kill that anyways.
If you want more power, it takes more fuel. Of course efficiency is part of the equation, but that only goes so far. The basic rule here is power = fuel in one form or another. Power adders cram additional air into the cylinder, the PCM/tune adds the needed fuel to keep everything happy.
You could bump up your compression ratio. That adds power no matter what the combo. Even stock(who the hell would do that though).
On my combo, my gear swap from 3.73 to 4.10 took me from 19.5 hwy to 15 hwy mpg's. I don't ever measure city driving, but aftermarket torque converters typically kill that anyways.
Jun 21, 2011 | 01:32 AM
#20
your worried about MPG buy a honda!!
we drive 5000 pound trucks with v8s that are modded MPG is something we forget about
I average 14 and 20 cammed stalled and bolton 5.3 on stock 3.42 gears
Thats driving like paw paw...drive aggressive and you can watch the gas gauge go to E quickly
we drive 5000 pound trucks with v8s that are modded MPG is something we forget about
I average 14 and 20 cammed stalled and bolton 5.3 on stock 3.42 gears
Thats driving like paw paw...drive aggressive and you can watch the gas gauge go to E quickly
