Been there done that, the stock manifolds work much better than LT headers. I got 18 mpg in the city and 22 mpg on the highway with the STS kit. The 22 on the highway was running between 75-85 mph. Once you are up to speed it never shifts down no matter how steep the grade. Stock 5.3 with 918 springs and a 2600 stall.
2000 RCSB forged ls1, 4l80e, t-76
10.93@124 1.58 60'
Pretty much...lol...Originally Posted by Ramsey
No seriously I'm getting like 8-10 mpg and either need to improve that or get out of the truck scene. It's too much money when we're trying to move.
z2.. Sound quality is a little less with my setup now, but the spool time is alot faster
1951 3100
1984 C10
Moze, I know that when Jason (MIDNIGHTRIDER) put the Maggie on his truck (04 ECSB LQ4), he is getting about 21-22 mpgs on the hwy. You may need to have someone do some fine tuning on your truck.
2000 ECSB 6.0L
TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's
Could the odometer/speedometer be off some, too? It all adds up. Get a GPS and go out and measure your speed.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Mozes tune is fine...it has been looked at by a couple of the best tuners in the area...
2006 silverado SS....Clifford Jr...turbo coming soon
1970 Chevelle ly6 swap....d1 coming soon
Dustin did the tune, Sean at LG looked at it, then Sam looked at it and it's all good.
LOL...Virgil, funny enough--I suggested the same people who have looked at it...
2000 ECSB 6.0L
TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's
Those guys were probably looking at only the performance end of the tune. The economy that you're looking for is totally seperate and takes a lot of tuning to fine tune to work through all the cells.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
no Greg, Sam and Sean both went for rides...Sam is the one who always helps me when i have problems..he made a couple of changes a week or 2 ago and got me a lil over 1mpg better
2006 silverado SS....Clifford Jr...turbo coming soon
1970 Chevelle ly6 swap....d1 coming soon
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