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  #1  
Old 02-08-2011, 12:07 PM
huey224 huey224 is offline
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Default 2.9 help

I have a 86 ranger 2.9 5speed 4x4 My grandfather bought it new in 86 it has it has well over 100k on it runs great dont smoke has the normal 2.9 lifter ticks but now the mains are knocking so its time to rebuild im looking for just a little more power it has great power now but im looking for some things to do while im rebuilding like,cam,intake,headers and tips or tricks will b greatly appreciated im used to building 302 but my first v6. im gonna do a port and polish and cold air intake and headers but can i use like 5.0 roller rockers?
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  #2  
Old 02-08-2011, 02:18 PM
Psychopete Psychopete is offline
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Default Re: 2.9 help

Performance isn't easy or cheap.. Like most, heads are likely where you're going to see the most improvement.

Cam is going to need to be a custom grind, cam craft has RV cams (might be able to grind one for you), Colt Cams in B.C. does it, or just ask a mfr if they will do it. And you would want new springs that match the cam.

4.0L valves w/ machine work

I heard that 390ci Ford lifters would work (but I haven't tried it).

Free floating rocker arm conversion.

Could have ARP rod bolts installed and have the rods shot peened for additional strength there.

Mill heads to bump up CR, but intake needs milled to compensate also depending on how much is shaved off.

If too extreme - you'll need to swap up to a '90 California Emissions computer to use a MAS instead of a MAP sensor, or else it just won't run well.

The only roller rockers I have seen were made by CamCraft for $550 and had a 1.55:1 rocker ratio. Very nice, just a big chunk of change.

Think Tom Morana has some stuff too.

There's a book out there by Sven Pruett that covers 60 degree Ford engine performance, but very hard to come by. And a lot of the mfr info pertains to manufacturers that are no longer in business.

You already have the 58mm TB, but it's possible to swap a larger TB from a 5.0L, but I don't think you'll need anything that big.
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  #3  
Old 02-08-2011, 03:55 PM
Bird76Mojo Bird76Mojo is offline
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Default Re: 2.9 help

If you're used to building 5.0 engines then swap one of those in. You'd likely have the same amount of money in the swap as you would building that 2.9


GB
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2001 Ranger Edge Regular cab, auto 4.0L 4x4 4.10LS

1989 Ranger Regular cab longbed, manual 2.9 4x4

Parts BroncoII's x 3
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  #4  
Old 02-08-2011, 07:07 PM
huey224 huey224 is offline
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Default Re: 2.9 help

well im really wanting to stick with the engine that was in it it has some centimental value to me but i thought id just get me a little more bang out of it. i like doing different stuff the only v6 ive ever done was a 3.8super coupe and that was just small stuff. im not really looking for alot of work i really appreciate all the info. where can i get that floating rocker setup? is like a 390fe style is that what yur talking about? where they all mount on a bar? thanks 4 the help
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  #5  
Old 02-08-2011, 10:01 PM
Bird76Mojo Bird76Mojo is offline
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Default Re: 2.9 help

http://cgi.ebay.com/Rebuild-Ford-V-6...item5d2d16b53f


If it were me rebuilding a 2.9, and wanting to do what you're wanting to, I'd do the following and call it good.

Besides the inital rebuild...

Buy World Product Heads and have them ported/polished. ARP head bolts. Find an aftermarket cam. A set of headers. Have the lower intake ported/polished and matched to the heads. Also port/polish the upper intake. Possibly injectors with a higher PSI.. and an intake that would flow a little better.



GB
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2001 Ranger Edge Regular cab, auto 4.0L 4x4 4.10LS

1989 Ranger Regular cab longbed, manual 2.9 4x4

Parts BroncoII's x 3

Last edited by Bird76Mojo; 02-08-2011 at 10:09 PM.
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  #6  
Old 02-08-2011, 11:25 PM
huey224 huey224 is offline
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Default Re: 2.9 help

sweet thanks for the info
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  #7  
Old 02-28-2012, 01:06 AM
orygun orygun is offline
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Default Re: 2.9 help

I'm on the floating rocker search! I have found the book @$125 online. I just need pages 155-156 to get more detailed specs. If someone has the book could you post the pages pleeease! I'm not going to spend much, I'm just going to by a cam, new lifters and pushrods. I'm just extremely curious to see what it's like to own a bronco thy has good oil production. My first rig and many after have been broncos and I just want some good oil flow and less chatter. Heck I'll buy the sleeves if someone can point me in that direction.
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1989 XLT Bronco 2 5speed 2.9
6" SkyJacker 3" body Sky.J alignment Yellow Top 19" elec. Fan on a 4 core 8.8 rear 35 front 3:54Ratio XPloReR rear D.line Ranger rear D.Line in front Man-shft XPloReR T.Case 10" Clutch XPloReR Starter 4x Factory disc. Still ! Factory radius arms tan interior two tone brown/tan paint. STILL factory bumpers
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  #8  
Old 02-29-2012, 09:21 PM
Psychopete Psychopete is offline
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Default Re: 2.9 help

I have one around here somewhere, and I sort-of remember reading about that. it's been a while but it's not the dimensions of the rocker arms that the book tells you, it's the tolerances that need to be between the spacers and the rocker arm. Pretty much you'll have to find the dimensions and machine, or have them machined. Another alternative is camcraft cams, they sell them IIRC.
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