Carb / Intake Choice - 300/4.9
#1
Carb / Intake Choice - 300/4.9
I'm trying to decide on an intake / carb setup for my 4.9 I6. I'm rebuilding a salvaged engine. Nothing fancy but I'm looking for good performance across the rpm range and good low end torque. Basically, a solid and dependable runner.
It's going in my '85 F150 4x4
I'm thinking an offenhauser C intake but the carb choices are overwhelming:
Weber 32/36 DGV?
Holley 390?
Holley 600?
Any of those work 'as is' or will they need to be re-jetted? The block is an EFI one so no mechanical fuel pump. I can machine it for one, but I hear in some cases an electric pump (Carter 4070) works best.
Bottom line; I'm looking for some advice from someone who has actually done any of this.
Anyone?
It's going in my '85 F150 4x4
I'm thinking an offenhauser C intake but the carb choices are overwhelming:
Weber 32/36 DGV?
Holley 390?
Holley 600?
Any of those work 'as is' or will they need to be re-jetted? The block is an EFI one so no mechanical fuel pump. I can machine it for one, but I hear in some cases an electric pump (Carter 4070) works best.
Bottom line; I'm looking for some advice from someone who has actually done any of this.
Anyone?
#3
What size 2150? 1.02? 1.08? 1.14? 1.21? ,etc.
KsCop: you might want to open the hole for a stock fuel pump. This would give you a choice of a mechanical or electric fuel pump. Plug the hole if you don't use it. Just a thought.
thanks, jack
KsCop: you might want to open the hole for a stock fuel pump. This would give you a choice of a mechanical or electric fuel pump. Plug the hole if you don't use it. Just a thought.
thanks, jack
#4
I'd like to go with a new carburetor vs salvage or rebuilt. Haven't had much luck in those areas..
#5
If you use a 4v carb on a C manifold, install a spacer with 4 holes between the two. The Edelbrock 1403, 500 cfm, is an out of the box carb. Mine was install and run. They also make a $50 tuning kit with jets and metering rods, etc. The box offers an easy chart, and it is simple to swap jets and metering rods.
And yes, used carbs are a crap shoot. You never know if the po has drilled orifices or not, making the tuning of said carb impossible.
With either the C or DP intake you'll need a heating plate on the bottom to maintain good driving manners and stabilize the intake temperature so the fuel/air mix doesn't puddle inside the runners.
Good luck.
And yes, used carbs are a crap shoot. You never know if the po has drilled orifices or not, making the tuning of said carb impossible.
With either the C or DP intake you'll need a heating plate on the bottom to maintain good driving manners and stabilize the intake temperature so the fuel/air mix doesn't puddle inside the runners.
Good luck.
#6
#7
Trending Topics
#8
Motorcraft/Autolite Carb Selection and Jet Size
Thanks to all, ...jack
#9
throttle cable bracket ?
im doing this right now I have a 356 cfm off of a 69 cougar 351w
do you remember what throttle cable bracket set up you used ?
ty
#15
I picked up a Clifford intake with a Holley 4548. I'll see how that works out.
I just dropped off the block, head and crank at the machine shop today. On first inspection, it all looks in good shape and will require minimal machining.
Also orders a new cam, timing set, lifters, springs and push rods. Went with a Comp Cams 260h.
Machinist said he'd be done next week and then I can see what I need to order.
One step closer..
I just dropped off the block, head and crank at the machine shop today. On first inspection, it all looks in good shape and will require minimal machining.
Also orders a new cam, timing set, lifters, springs and push rods. Went with a Comp Cams 260h.
Machinist said he'd be done next week and then I can see what I need to order.
One step closer..