Nevadasmith
Active member
Doing a restomod 71 Bronco, installed is a 74 250 carter RBS carb, duraspark 2, stock manifold. Pulls great on the bottom end, but falls on it's face at 2800 rpm. and if i push it past 2800 my gas mileage gets real bad real fast. The exhaust is 1-3/8" P/o did it(waiting till new transmission is in befor going to the muffler shop). I use this truck as a sometimes commuter, mostly trails and rock crawling. What size exhaust should I be running? 2-1/4"? Not going to headers, and I really want to keep as much low end torque as possible. Is there a carb that will perform better especially off road ? Or should I re jet, its always rich and i'm driving mostly between 4000-8000 elevation. Will those help with my top end woes?
My ultimate goal is a fun rock crawler, that I can still daily drive and hopefully 18+ MPG.
I am building a new engine, and would Like input on my plan.
69 250 block crank rods
255 v8 pistons .040 over
82 200 Biggest log head milled .050 and milled for either Howell injection or motorcraft 2100 ???
The I'm trying to decide on cam and timing set, Leaning toward the 82 200 cam with the early 69 250 timing set? I also have a 66 170 I can steel parts off of????
I am getting ready to install a ZF5 speed and that should put my cruse 2000 rpm instead of 3000, so I want an engine with max torque from 600-2400 rpm but that will still turn to 4000 rpm if I need it, and any help is a big help! thanks in advance.
My ultimate goal is a fun rock crawler, that I can still daily drive and hopefully 18+ MPG.
I am building a new engine, and would Like input on my plan.
69 250 block crank rods
255 v8 pistons .040 over
82 200 Biggest log head milled .050 and milled for either Howell injection or motorcraft 2100 ???
The I'm trying to decide on cam and timing set, Leaning toward the 82 200 cam with the early 69 250 timing set? I also have a 66 170 I can steel parts off of????
I am getting ready to install a ZF5 speed and that should put my cruse 2000 rpm instead of 3000, so I want an engine with max torque from 600-2400 rpm but that will still turn to 4000 rpm if I need it, and any help is a big help! thanks in advance.