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#1 |
Registered User
Join Date: Jul 2007
Location: edmonds, wa
Posts: 3
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new engine ideas
I am swapping out a chevy 6 in my 72 c10 for a more fuel efficient engine. Anyone got a suggestion on something that will push the truck around but still get better gas mileage? Hunter43
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#2 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: new engine ideas
Vortec 4.3 with a 700r4 tranny...
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#3 |
Registered User
![]() Join Date: Dec 2008
Location: indiana
Posts: 304
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Re: new engine ideas
Any LSX engine and an over drive trans.
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00' Z28 ("wifes" car) 92' Mustang w/sbc ![]() 87' GMC Sierra Classic Short Bed Fleet side almost stock 69' Chevy short step carbed 6.0 w/400th trans. Completed w/325 miles on it |
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#4 |
Registered User
Join Date: Sep 2008
Location: Houma LA
Posts: 193
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Re: new engine ideas
BLown 4.3 with overdive!!! LOL That would be pretty cool!!!
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1968 GMC Rebuilding Stage ![]() 2001 Camaro SS SOLD ![]() |
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#5 |
Registered User
Join Date: Oct 2007
Location: Sherwood Oregon
Posts: 1,908
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Re: new engine ideas
5.3 LSX with a 6 speed automatic would be sweet, even sweeter if you added a gear vendors to make it a 12 speed and put paddle shifters on it
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#6 |
Senior Member
![]() Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,957
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Re: new engine ideas
Any gen 3 (LSx) and it's matching overdrive trans. Those motors just make nice power and don't eat a lot of fuel.
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ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ |
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#7 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: new engine ideas
How much money you got?
Cheapest route (assuming it runs well) is to back the I-6 with a 700R or 5 speed (seems to be more popular with the straight six crowd.) The 4.3 with a 5spd or 700R is another good option. Personally, if I had the extra $$$, I'd install a 5.3/4L60. 290 HP stock, fuel injection, OD transmission, it's just a little pricey for the set up and all the stuff to make everything work together. HOWEVER, if you do a lot of "city driving," under 45mph or so, you won't see much of a difference with any of these set-ups.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 02-01-2009 at 01:22 AM. |
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#8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: new engine ideas
how many MPG you getting now?
How much you looking to spend? How much MPG do you expect out of this truck? |
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#9 |
Registered User
Join Date: Oct 2007
Location: Sherwood Oregon
Posts: 1,908
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Re: new engine ideas
MAST motorsports put their L92 crate motor and the 6L80 trans in a '68 short bed, they got 17 MPG on the power tour, and that motor puts out 525 horses
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#10 |
Registered User
Join Date: Nov 2008
Location: Carmel, IN
Posts: 187
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Re: new engine ideas
I would like to drop in a 4 cylinder direct injection ecotec. VVT and fuel sipping economy, with my granny tranny, my c30 will still pull like a bull.
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#11 | |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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Re: new engine ideas
Quote:
That's cruising down the highway. It probably only gets 11-12 mpg in "city" driving. The 6.2L 6L60 Denalis are rated at 12mpg with a 3.42 rear gear. It most likely also requires premium fuel.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 02-01-2009 at 06:03 PM. |
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#12 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: new engine ideas
In theory, a larger engine in a smaller body will use less fuel to move it....in theory. The truth is that we tend to like the idea of a bigger engine and then we flog the crap out of it, just for tickles and grins....
My '96 GMC has a 4.3/AOD and I get about 17MPG around town, on average. Is that the kind of improvement you want....if it is an improvement? An acquaintance of mine used to race dirt track with motors that were built to be claimed (I think that is the right term). Anyway, he would start with a 4.3, add a pair of heads from a 229 V-6, do a little "finaglin'" and a little bit of exhaust work to pair up the right cylinders in order to achieve a good scavenging effect, then clean up on the track. So, the 4.3 can be made to run, and with a good transmission/final drive ratio, also made to be somewhat economical. Would I put one in my truck? What, and give up my V-8? Never happen, GI!!
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#13 |
Registered User
Join Date: Oct 2007
Location: Sherwood Oregon
Posts: 1,908
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Re: new engine ideas
Haha the way I drive I would be lucky to get 9 MPG out of a 525 horse motor
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