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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 01-08-2007
blackbetty's Avatar
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rebuilding a 4.0

ok its prolly come to my conclusion that im goin to stick with the 4.0 and get it rebuilt instead of doing a v8 swap. my first reason is if its getting rebuilt i can set it up where the 4.0 can makes just as much power as a stock 302 or even a modded 302. now this is whats caome to my mind for rebuilding.

Bottom End-new bearings all around, new seals everywhere, depending on how bad the crankshaft is that is in the option, quite possibly some forged connecting rods.

Block-have it stripped, cleaned, re-painted, bored .30 over, and maybe decked depending how outta whack the block is.

Forged pistons*

Oil Rings*

New Camshaft*

Ported Polished Heads and intake manifold* (have a friend that could do them for a really good price)

Valves*, Roller Rocker Arms*, Arp Studs all around.

Roller LIfts*

Screamon Demon coil pack*

Accel or Mallory Wires*

Underdrive Pulley*

Timing Chain*

Fuel Injectors and lines*

66mm Throttle Body*

Air box Mod to get as much as possible under normal driving conditions.

Headers, slightly ported for better flow*

Programmer*

So this is what came to my mind so far.....tell me how this sounds and what should i change and need or do to make sure it all works nicely.
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Old 01-08-2007
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A modded 302 will chew up a modded 4.0L and spit it out. Besides Summit and Jegs have pages just for 5.0L engines and you will have the potential to makes as much HP and you want to spend. The 4.0L is probably going to make less then 300hp no matter what you do to it if it's N/A. You can put a set of heads, manifold and headers on a 5.0L and surpass that.
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Old 01-08-2007
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Quote:
Originally Posted by EricTodd
A modded 302 will chew up a modded 4.0L and spit it out. Besides Summit and Jegs have pages just for 5.0L engines and you will have the potential to makes as much HP and you want to spend. The 4.0L is probably going to make less then 300hp no matter what you do to it if it's N/A. You can put a set of heads, manifold and headers on a 5.0L and surpass that.

ok so that idea has been chewed up and spit out....lol remember this was just an IDEA, not forsure just ideas foating around, but thanks for the input.
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Old 01-09-2007
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ya, I would go carbed 5.0 before spending a ton trying to put power in teh ohv

Last edited by telemaster1952; 01-09-2007 at 07:44 AM.
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  #5  
Old 01-09-2007
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if you are rebuilding the 4.0, why not put in a Comp Cams performance cam......they have 2 different styles...

1. http://store.summitracing.com/partde...5&autoview=sku

2. http://store.summitracing.com/partde...5&autoview=sku

you have a pretty good list......i would rather rebuild my 4.0 to the way i want it than do a v8 swap....
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Old 01-09-2007
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Quote:
Originally Posted by telemaster1952
ya, I would go carbed 4.0 before spending a ton trying to put power in teh ohv
i dont think there was ever a carbed 4.0......every 4.0 put in before '00 was an OHV...
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Old 01-09-2007
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Quote:
Originally Posted by lifted97ranger
i dont think there was ever a carbed 4.0......every 4.0 put in before '00 was an OHV...
oops sorry i ment to put in 5.0
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Old 01-09-2007
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yea yea yea....

the thing with a v8 swap, it takes A LOT of time and parts....you almost need an Explorer that had a v8 in it so you can take one part off the Explorer, then put it on the Ranger........there is also fabrication skills required and welding.....not to mention all the electrical work that has to be done to adapt..........

i wanted to do a v8 swap in my Ranger, but after i really did research on it, i decided that it would be WAY to involved to do (i am a stickler and want it done to look stock)......so here in the next 6 months to a year, i plan on pulling the 4.0 and start giving her a good work over....
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Old 01-09-2007
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Quote:
Originally Posted by lifted97ranger
yea yea yea....

the thing with a v8 swap, it takes A LOT of time and parts....you almost need an Explorer that had a v8 in it so you can take one part off the Explorer, then put it on the Ranger........there is also fabrication skills required and welding.....not to mention all the electrical work that has to be done to adapt..........

i wanted to do a v8 swap in my Ranger, but after i really did research on it, i decided that it would be WAY to involved to do (i am a stickler and want it done to look stock)......so here in the next 6 months to a year, i plan on pulling the 4.0 and start giving her a good work over....
true that

for people with the skills to do it the 5.0 is more worth the fab, for the rest of us 4.0 stroker is similar in price(though not as powerful) but still Bad!
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Old 01-09-2007
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a 4.0 stroker can be a wicked little engine....add a shot of NOS and you can have a 8 second 4.0....in a 2wd of course........when i build my engine, it will be a 4.0 bored .30 over with a Comp Cam...
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Old 01-09-2007
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Quote:
Originally Posted by lifted97ranger
a 4.0 stroker can be a wicked little engine....add a shot of NOS and you can have a 8 second 4.0....in a 2wd of course........when i build my engine, it will be a 4.0 bored .30 over with a Comp Cam...
how much estimated HP/tq is that putting out?

isnt that has D. has...........(havent seen him around lately)
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Old 01-09-2007
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i would say with the block bored .30 over, a Comp Cam, heads ported and polished, exhaust manafolds, and a Bama i could easly see 250-275 hp and i dont know about torque......
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Old 01-09-2007
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and to tell you the truth thats a lot power for a truck thats a DD, if you think about it where are you gonna be able to use 500 plus ponies with out havin the 5.0 on ur ***.
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  #14  
Old 01-10-2007
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Quote:
Originally Posted by telemaster1952
how much estimated HP/tq is that putting out?

isnt that has D. has...........(havent seen him around lately)
I've been busy with Chemo and Band recording. Sorry I haven't been so active.

My engine had the heads done at a local shop. They were extruded and had a full on valve job. One the bottom end, the crank journals were all refinished and they have Manley ' small block chevy ' H-Beam type rods with ARP fastners and a set of cut pistons. The whole reciprocating assembly was balanced as well.

The engine SUCKS down low, but once it hits about 3 grand it pulls pretty well. I redline somewhere over 6 grand ( Its where the tac stops ) . I've been told by the builder its good for 7500 rpm's, but I Highly doubt it would last long at that rpm level.

After being overbored, the blocks cylinder walls arent too thick. Its the weakest part in my present mill. I don't trust it anymore after putting 20k miles on it and probably.. 150 bottles have been put through it as well.

I honestly don't know why it hasn't blown yet.
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  #15  
Old 01-10-2007
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but is a built 4.0 OHV gunna be streetable? will it over heat? will it idle well in traffic and draw enough vacuum to run accessories? will it live past XX miles? what rpm will the power band be moved up to?

those are all questions u need to think bout if ur going to put forth the max into a smaller engine to make big power. i assume this is going into the 1992 he has in his sig, if so...the swap will be a breeze. i dont know WTF ur talking bout using an explorer v-8 and all...
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