GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

cam+6L+5600LB=25mpg!!

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Old May 26, 2008 | 10:28 PM
  #11  
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Originally Posted by hirdlej
What's the total rundown on your motor?

Comp?
heads?
cam?
etc etc
alrighty, here it is

LS2 block
Stock lq4 internals
ls6 oil pump
ls7 lifters
stock truck 6.0 heads with ports cleaned up
8.1 marine inj
stock intake system
comp cam 222/224 (.566/.568) 112
pacesetter headers
yank tt2600
93 octane only tune
stock clutch fan.

i think thats all of it. The compression is right at 10/1 i believe
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Old May 26, 2008 | 10:45 PM
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damn dude... ur driving a bigass truck with the appetite of an import!!!
keep us posted!!!
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Old May 26, 2008 | 10:48 PM
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Very nice! I'm jealous LOL, I don't get that with the DOD
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Old May 26, 2008 | 10:49 PM
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Who did the tuning?
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Old May 27, 2008 | 03:17 AM
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Wow, you sure you went 159 miles? Is your PCM tuned with the correct tire size? J/K, I believe you. Very impressive to say the least. Who did the tune?
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Old May 27, 2008 | 07:41 AM
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u got to be kidding me mine with a smaller cam and more less the same weight it gives me somewere from 8-12mpg's how the hell did u do that or did u just drive 45 all the way in cruise control like old people
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Old May 27, 2008 | 08:48 AM
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Originally Posted by BlackGMC
Who did the tuning?
His name on here is 67SS509, but i know him as james. I bought the motor from him and he did me a favor and tuned it for me. He told me i may need to get another tune, depending on how it drives, but so far its great..

I was using cruise control almost the whole time, i set it at 70 and keep it there. Im think even if i messed up a little at the pump and it would of fit another gallon, it would still be 21-22MPG and i would never complane about that.
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Old May 27, 2008 | 09:00 AM
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Was that highway mpg?
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Old May 27, 2008 | 10:27 AM
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Originally Posted by way2much_01
Was that highway mpg?
Setting the cruise at 70 in the city wouldn't be the smartest or safest idea, so I think we can assume it is highway..
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Old May 27, 2008 | 10:43 AM
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well Im getting 30 mpg... on my bike
thats some bad *** MPG outta a big bitch like that. My trucks about 4k with a smaller cam and a 4.8 and I cant seem to get better than about 12 at the moment. Im pretty sure my tune is still wack cuz its runnin like
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