truck tuning

[TxStVanWilder]

<div class='quotetop'>QUOTE(1993chevy &#064; Jan 4 2007, 05&#58;54 PM) [snapback]78329[/snapback]</div>

if i go the truck ls1 i will just use the 4.8 i have and then latter get a 408 block to replace the 4.8 block. right now i just need power and good mileage. i already know that the 6.0 doesn&#39;t get great mileage, my grandpa&#39;s truck never gets better than 16 on the highway. even my 350 could pull that kind of mileage, not as much power but still. the 4.8 gets 18-22 mpg on the highway. but if anyone has any more suggestions keep them coming, i really do appreciate all the impute and advice, since i still haven&#39;t made any set decisions, if anyone has a suggestion on another engine to use you may be able to change my mind.
[/b]

i got my aeroforce gauge yesterday and i was using the MPG function... my truck a 5.3, cam, headers, ORY, and a nelson tune, i was gettin roughly 20-25 mpg depending on speed, wind, how flat the road was... i could hold a steady 23 mpg... i dont know what kind of milage you could get out of a 4.8... but thats something to think about

[RedHeartbeat]

Damn, I wish my 408 could get 23 MPG.

[DBYRD]

Daniel&#39;s LQ9 6.0 SS gets 20MPG 16 sounds like a 2500hd pulling something IMO>

[Red03SilSS]

<div class='quotetop'>QUOTE(Allstar55566 &#064; Jan 5 2007, 12&#58;26 AM) [snapback]78366[/snapback]</div>

Daniel&#39;s LQ9 6.0 SS gets 20MPG 16 sounds like a 2500hd pulling something IMO>
[/b]

Sure does. And thats AWD ext cab heavy MOFO&#33; Ya know? I can cruise 70 and get 20 mpg.

[heavypulling]

the truck my grandpa has is a 2002 1500HD with the 6.0 4l80e and 4.10 gears. that is why it gets no more than 16 highway, my truck also has 4.10 gears so i really don&#39;t want that engine just to get the same mileage. also it is alot cheaper to get a 350 and install, plus i can get 17 maybe 18 with the vortec heads. but thanks for the info, maybe a truck that isn&#39;t stock will get better. please keep the info coming i really do appreciate everyones input it does help.

[Weird_guy]

<div class='quotetop'>QUOTE(1993chevy &#064; Jan 5 2007, 06&#58;48 PM) [snapback]78447[/snapback]</div>

the truck my grandpa has is a 2002 1500HD with the 6.0 4l80e and 4.10 gears. that is why it gets no more than 16 highway, my truck also has 4.10 gears so i really don&#39;t want that engine just to get the same mileage. also it is alot cheaper to get a 350 and install, plus i can get 17 maybe 18 with the vortec heads. but thanks for the info, maybe a truck that isn&#39;t stock will get better. please keep the info coming i really do appreciate everyones input it does help.
[/b]

You also have to realize, that our OBS trucks are much lighter than the newer style trucks. And that in its&#39; self will help with fuel economy.

[NITROUS]

You&#39;ll be really lucky to get 17 to 18 mpg with the 350 and vortec heads with the 4.10 gears. I&#39;ve ran that setup before my LS1 and it ate the gas. Without the 4.10&#39;s and a good tune, bored-descreened MAF, Helix spacer, headers and exhaust got me 20-21 MPG. When I installed my 4.10&#39;s and cam it went to 14 MPG.

[heavypulling]

my 350 before i toasted some internal parts i was getting 17mpg driveing 75mph. That is with a stock 350 exhaust trottle body spacer. so i should be able to get 18-19 if i had a vortec truck. i know that the 4.8 would get 22 but i just don&#39;t know if the cost of the swap is worth it, when theres so much more to the swap and alot can go wrong. i already know that it will cost me &#036;1,075 for the tune and wiring harness. also motor and mounts will bring it to another 1,000. that brings my total to &#036;2,075 then these all the new hoses and fuel lines. also a/c relocation, which is &#036;640. also i will need a new fuel pump which i found out is over &#036;300. So this could run me &#036;3,500 once done. Then i would have to rebuild my tranny at least i think i would.


If i had the money it wouldn&#39;t be a problem i would just do the swap no questions asked, but when i can have a new motor for less money that is the clear choice.

also to add to it i hit a dear and that is how the engine over heated, also that too care of the bumper, grill, a/c condensor, radiator, and all the lights. it also damaged the radiator core support. which all this will run me about &#036;800 with the best prices i could find.

if anyone can help so this wouldn&#39;t be so expensive the would be great but as far as i can tell it won&#39;t be cheap.