REAL World MPG's

lts1ow

Needs moar PAH!
May 14, 2012
1,598
0
36
NJ
I'm willing to bet you have already spent more on your truck than your retirement account and maybe your house that is if he don't rent

Personal attacks still don't take away from the fact you can't argue his point. A gasser will come no where near that combo.
 

LBZ

Super Moderator
Staff member
Jul 2, 2007
9,903
149
63
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B.C.
And with that he's gone.
Back to Real World MPG from DIESEL owners!
Or let this ancient thread die. Whichever.
 

WolfLMM

Making Chips
Nov 21, 2006
4,005
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AL
And as for hp per dollar between LS and Dmax, eh it's going to be roughly the same. A true 1000hp LS based motor will cost just as much a built duramax. 9 times out of 10, you have to find a suitable block for build ( most guys have 5.3/4.8) get rid of the 60e, that means new front and rear driveshafts, beef up the 10 bolt that's in lots of trucks, either 6-10k in a turbo setup or blower, and tons of little things. Too me, I was real high on the LS koolaid for a while and believed all the, "oh you can have a 500whp truck with boltons, cam, mild heads, etc. Go to the dyno with a supposed 450whp truck (according to all the gasser forums) lay down a whooping 370....

So in the end, I think it costs the same... Not to even mention a 700hp gasser isn't going to be very dd friendly with a 4,000 stall converted to make it run decent times, the big thumping cam, and the catless (stinky) exhaust...
 

Harbin_22

Active member
Dec 4, 2010
3,858
7
38
Southern Indiana
I'm willing to bet you have already spent more on your truck than your retirement account and maybe your house that is if he don't rent

I obviously have the money to spend on it. My truck is a drop in the bucket. Retirement fund? All them mpg's I'm getting will be bankin in that retirement fund.
 

malibu795

misspeelleerr
Apr 28, 2007
8,239
550
113
42
in the buckeye state
Exactly.
Show me a gasser that can do that and tow 20 000lbs.

His gasser wouldn't keep up towing this same 21,000lb trailer that I did at 70 avg 9.5mpg loaded 17.5 coming back
1459094_10204585217923978_25510100340784456_n.jpg
 

Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
0
0
Uhhh, gonna have to disagree, IF we are talking strict race/fast DD truck status now. You can have a built 6.0, with a S480 on it, some 80# sticks, E85 tuned and a built 80e for much much less than a built dmax/alli.

And when/if you blow the 6.0, you can grab a junkyard 5.3/4.8 and slap it in for dirt cheap.

In that aspect the cost is leaning towards gasser being cheaper, I mean hell, I made ~700hp with my gas guzzler for well less than 8k...
Well then, hook me up brutha!
Cuz im building an LS for 650-700whp right now and i cant come close to that cost!!!

Built 4L60/70E by Rpm, level 7 $3850
S480 and full kit w/intercooler $4800 (im actually going to use a Procharger F1-R kit for a cost of $6800, but ill use the S480 cuz thats what you outlined)
Injectors $600
E85 tuning $500
Built LQ4 customer supplied block $3800
Ported heads w/upgraded valves $1000

$13,150

There's obviously going to be other things that need to be accounted for too, like a trans cooler($350), in tank fuel pumps($500), intake manifold($1000) exhaust...etc etc

Maybe you can pull it off, and thats awesome and this is not an attempt to challenge you, but i cant do it for that cost and I just cant see a 700whp gasser for $8k

But hell, some guys can build a 1000hp duramax for under 8k too

In contrast...
Duramax power (ricer math FTW!)
Built trans $4300 intaslled
Efi live DSP5 tuning $700
Turbo upgrade $2300 (drop in VGT)
Injectors $3000 (used)
Lift pump $650
Head studs $600

$11,550
Stock CP3, stock block
610-630whp

Push the limits with a dual fueler or stroker CP3 for an additional $2200 and 700 is an easily attainable goal for a whoping
$13,750

So an "almost" apples to apples outcome between the two is very comparable in the estimated cost to achieve said outcome

Granted the gasser has a built engine, and a Dmax build "CAN" start in the mid teens, but the duramax will still have the ability to drive and idle like a stock truck
But we all know this
;)
 
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Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
0
0
I'm willing to bet you have already spent more on your truck than your retirement account and maybe your house that is if he don't rent

OMG
Really man....???

What would you pretend to know about another mans finances, better yet WHY would you pretend to know...

Go F yourself in the A with a big hairy prikly pear cactus, ya worthless troll
 

Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
0
0
CoCo, don't try to justify owning a Dmax. 95% of the members here don't need one including myself. I wanted one and I bought it. I didn't need to get married either but I like playing with my girl.

LMAO!
Thanks for the reality check Landon!
Lol

Youre absolutely right!
I just sold our toy hauler last week, so now i REALLY dont need this truck, but I love it, I want it and I'll be damned come hell and high water if i ever have to give it up!
And i took the liberty of editing your post there at the end
:)
 

onebaddmaxxx

Active member
Feb 22, 2009
1,212
1
38
Cecil County Md
Well then, hook me up brutha!
Cuz im building an LS for 650-700whp right now and i cant come close to that cost!!!

Built 4L60/70E by Rpm, level 7 $3850
S480 and full kit w/intercooler $4800 (im actually going to use a Procharger F1-R kit for a cost of $6800, but ill use the S480 cuz thats what you outlined)
Injectors $600
E85 tuning $500
Built LQ4 customer supplied block $3800
Ported heads w/upgraded valves $1000

$13,150

There's obviously going to be other things that need to be accounted for too, like a trans cooler($350), in tank fuel pumps($500), intake manifold($1000) exhaust...etc etc

Maybe you can pull it off, and thats awesome and this is not an attempt to challenge you, but i cant do it for that cost and I just cant see a 700whp gasser for $8k

But hell, some guys can build a 1000hp duramax for under 8k too

In contrast...
Duramax power (ricer math FTW!)
Built trans $4300 intaslled
Efi live DSP5 tuning $700
Turbo upgrade $2300 (drop in VGT)
Injectors $3000 (used)
Lift pump $650
Head studs $600

$11,550
Stock CP3, stock block
610-630whp

Push the limits with a dual fueler or stroker CP3 for an additional $2200 and 700 is an easily attainable goal for a whoping
$13,750

So an "almost" apples to apples outcome between the two is very comparable in the estimated cost to achieve said outcome

Granted the gasser has a built engine, and a Dmax build "CAN" start in the mid teens, but the duramax will still have the ability to drive and idle like a stock truck
But we all know this
;)

instead of going with that 60e, id swap an 80e and do a shift kit and converter for probably 1000k total with price of trans. But I don't know your application, so not sure if an 80 will fit
 

othrgrl

Diesel Addiction Owner
Mar 10, 2008
2,151
4
38
Wilmington NC
www.mydieseladdiction.com
I had an LB7 which was fantastic for mpg. Went to the Florida panhandle doing 70-90 mph and still got 19.5 mpg which was hand calculated. I have an LLY and at 70 mph i can get 17.5 average. Even towing in the LLY wasn't that bad. Towed a 24ft travel trailer around 5000lbs at around 65 - 75 and still got 11.9 mpg. But I do live in Florida so its not like we have a bunch of hills. I should have never sold my LB7.

Check it for boost leaks and while it is under pressure listen around the EGR cooler and make sure it very slowly drops pressure. We find a lot of trucks, mainly LBZ/LMM but some LLYs with EGR valves that are leaking and it kills the mileage. Tune a truck and have the guy call 2 weeks later with rave reviews on the 22+ mpg; 8 months later he calls saying the tuning "went bad" and he is only getting 17-18 now; come in to look it over, find and fix the EGR issue (weld the ports in the intake tract shut) and 2 weeks later he calls back with the rave reviews again.

His gasser wouldn't keep up towing this same 21,000lb trailer that I did at 70 avg 9.5mpg loaded 17.5 coming back

But his nephew's "partner's" sister's dad just called with a 2020 Duramax and he didn't get that good of mileage with his stock suffocated and untuned truck towing a 14,657lb quadruple hull catamaran pontoon sailboat. So that makes you a liar and him right.

Even as the owner of a diesel performance shop and multiple 700+rwhp Duramax trucks I will say that $ for $ for a play toy street/strip truck we would all have a lot more money in the bank if we started with a RCSB 4x4 1500, threw a turbo on it, built the trans, and did the other upgrades as you broke things. At 700rwhp it will outrun most 1000rwhp Duramax's and when you blow it up you pick up a $300 motor at the junk yard and swap it in before the next track night, or build one that will actually hold up for a good bit cheaper than a budget Duramax build. At those power levels it won't be reliable, able to tow much (above and beyond the 1500's lack of towing capacity), very practical to daily drive on it's high stall converter and big cam, and to be light enough to run good times it won't have back doors or seats.

On the other side for a daily driven, family hauling, work, tow, play, street, strip, and sled pulling truck there is nothing that will compare to a Duramax. You can have anything from a stock trans safe tune truck that is more fun than 80% of daily driven street vehicles, to a fully built 1000++ rwhp and thanks to everything being computer controlled and the hard work of the folks at EFI Live you can change the way it runs with the flip of a switch and use it for pretty much anything you could need a vehicle for, and get good mileage doing it. Because of that a Duramax is the most practical vehicle for a horsepower junkie who only has the funds, space, and/or wife's permission to own one vehicle.

Don't worry though guys, if you go on let's say silveradoss.com and try to explain to them that a diesel would get better mileage, tow more, last longer, and be faster they would argue until they were blue in the face and try to run you off too. I joined to find some of the SS parts for my ECSB and went in their "quickest list" thread and asked if a 2500HD Duramax that was an SS Clone counted and could be added to the list (the 2nd best ET by .04 and 6mph over the best trap), most didn't take too kindly to it.
 
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Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
0
0
instead of going with that 60e, id swap an 80e and do a shift kit and converter for probably 1000k total with price of trans. But I don't know your application, so not sure if an 80 will fit

80 will fit, many have done it and there are bolt on kits to do so for my application...there's added cost there to me attaining the trans and mounting kit and some added HP loss associated with the 80
But it is a much more stout unit

Their are a couple trusted shops w/in the TBSS community that have done tons of R&D to make the 70 survive the weight of the TBSS at the power level I'm seeking to attain so im givin that a shot...my bigger concern is going to be with the AWD hard parts

Check it for boost leaks and while it is under pressure listed around the EGR cooler and make sure it very slowly drops pressure. We find a lot of trucks, mainly LBZ/LMM but some LLYs with EGR valves that are leaking and it kills the mileage. Tune a truck and have the guy call 2 weeks later with rave reviews on the 22+ mpg; 8 months later he calls saying the tuning "went bad" and he is only getting 17-18 now; come in to look it over, find and fix the EGR issue (weld the ports in the intake tract shut) and 2 weeks later he calls back with the rave reviews again.



But his nephew's "partner's" sister's dad just called with a 2020 Duramax and he didn't get that good of mileage with his stock suffocated and untuned truck towing a 14,657lb quadruple hull catamaran pontoon sailboat. So that makes you a liar and him right.

Even as the owner of a diesel performance shop and multiple 700+rwhp Duramax trucks I will say that $ for $ for a play toy street/strip truck we would all have a lot more money in the bank if we started with a RCSB 4x4 1500, threw a turbo on it, built the trans, and did the other upgrades as you broke things. At 700rwhp it will outrun most 1000rwhp Duramax's and when you blow it up you pick up a $300 motor at the junk yard and swap it in before the next track night, or build one that will actually hold up for a good bit cheaper than a budget Duramax build. At those power levels it won't be reliable, able to tow much (above and beyond the 1500's lack of towing capacity), very practical to daily drive on it's high stall converter and big cam, and to be light enough to run good times it won't have back doors or seats.

On the other side for a daily driven, family hauling, work, tow, play, street, strip, and sled pulling truck there is nothing that will compare to a Duramax. You can have anything from a stock trans safe tune truck that is more fun than 80% of daily driven street vehicles, to a fully built 1000++ rwhp and thanks to everything being computer controlled and the hard work of the folks at EFI Live you can change the way it runs with the flip of a switch and use it for pretty much anything you could need a vehicle for, and get good mileage doing it. Because of that a Duramax is the most practical vehicle for a horsepower junkie who only has the funds, space, and/or wife's permission to own one vehicle.

Don't worry though guys, if you go on let's say silveradoss.com and try to explain to them that a diesel would get better mileage, tow more, last longer, and be faster they would argue until they were blue in the face and try to run you off too. I joined to find some of the SS parts for my ECSB and went in their "quickest list" thread and asked if a 2500HD Duramax that was an SS Clone counted and could be added to the list (the 2nd best ET by .04 and 6mph over the best trap), most didn't take too kindly to it.

:roflmao:
:rofl:
:thumb:

!!!!PICS OF THE SSS CLONE!!!!!
 

moparkxracer

Well-known member
Jun 25, 2010
2,309
33
48
Out and about
His looks like a 1500 SS, it's a sweet setup.
80 will fit, many have done it and there are bolt on kits to do so for my application...there's added cost there to me attaining the trans and mounting kit and some added HP loss associated with the 80
But it is a much more stout unit

Their are a couple trusted shops w/in the TBSS community that have done tons of R&D to make the 70 survive the weight of the TBSS at the power level I'm seeking to attain so im givin that a shot...my bigger concern is going to be with the AWD hard parts



:roflmao:
:rofl:
:thumb:

!!!!PICS OF THE SSS CLONE!!!!!
 

othrgrl

Diesel Addiction Owner
Mar 10, 2008
2,151
4
38
Wilmington NC
www.mydieseladdiction.com
I collected almost all of the parts to make it an SS clone, including a custom rollpan that a guy makes for the SS trucks to fill the gaps under the tail lights. I would have to go back through my notes but there were a few pieces I was missing and I never got them or took the truck to the body shop before the crank broke. Once we get settled in the new shop and I pull the motor I'll probably take them the truck to install the SS stuff and paint the whole truck.
 
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WolfLMM

Making Chips
Nov 21, 2006
4,005
26
48
38
AL
Silverado SS.com is a joke lol. Most guys over there have 60-100k in there 11 sec trucks. I quit visiting that site years ago.