4 Bbl Carb For 4.9

Tazzmann · Nov 1, 2004

I am new to group.This is one of the best Bronco sites I have been to.I have an 86 full sized Bronco with a 4.9 6 cyl engine.I have a spare moter on an engine stand that I am going to rebuild because the one in the bronco has 219000 miles on it.It is still running great and I am not going to mess with it as long as it is running so good.But when I do,I have an Offenhauser dual plane 4bbl intake manifold for it.What size carb should I put on it? I have been thol the 600 Ededbrock is a good one and I have also been told to use a 390 Holley.Also would a stock cam work with either one of these set-ups,and should I look into a set of headers?Thanks,TAZZ

BigNasty · Nov 2, 2004

I think a 550 - 600 cfm anything would be good for it, even with a factory cam.
If you do go with a bigger cam, I would stay closer to the 600 cfm range and deffinately headers if you go that route.
Headers will help anyways tho

Tazzmann · Nov 3, 2004

Thanks,I know that Clifford performance makes headers for the inline6,but does anyone know who else also would have them? TAZZ

Bradt · Nov 3, 2004

Tazz I'm afraid you may just have to shoot that old engine before you get to put in the new one if you're waiting for it to quit.

Brad

DesertBronco · Nov 3, 2004

Tazz,

I think Headman makes a performance header for yours, with a choice of 2 or 3 different outlet sizes, depending on what you're going to bolt to the noisemaker end. I've used their headers on a couple different projects and really like 'em. Little pricy compared to what else you may find, but good stuff.

DesertB

Justshootme84 · Nov 4, 2004

Yeah, you may have a long wait on the I-6 before it goes out. As for the spare motor, what cid is it??? Just guessing, but for a 351W with a mild 4x4 or RV cam (why stay stock?) go with a 600-650cfm carb. Might look at the Holley Truck Avenger, it's rated at 670cfm. i don't like headers, so no comment there.