EFI or TKX swap
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Mountain Pass
Joined: Apr 2018
Posts: 214
Likes: 3
EFI or TKX swap
Hey guys had the truck out for a 150 mile drive around town and garnered a measly 6.5 mpg. I currently have a 351w and c6 with 3.70 gears so wanting OD has been a priority already but with the mileage being what it is I'm undecided which swap to first.
Thanks!
Thanks!
Lead Driver
Joined: Oct 2018
Posts: 7,876
Likes: 2,364
That cam is not going to help your fuel mileage in the slightest and a 750 is too much carb.
What do your plugs look like. what's your timing curve look like . you should get better than that but don't expect wonders.
What do your plugs look like. what's your timing curve look like . you should get better than that but don't expect wonders.
Lead Driver
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
I like the 300 I-6 with the ZF5 in something like yours. The 87 and on F250's can be found with that combo. If you want a pre fuel injected 300 I6 then pre 87 works. They can be built with plenty of zip and still great gas mileage.
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Mountain Pass
Joined: Apr 2018
Posts: 214
Likes: 3
Plugs are a touch on the lean side. I am running 33 degrees at WOT the curve is based on the purple springs and I THINK the timing comes in at 2200 but i would need to double check my graphs. I got the 750 for free so for the cost of a rebuild kit and a secondary upgrade it was a good investment.
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