stroker kit for 4.0

[tac0meat]

i was just wandering if there was a stroker kit out there for our 4.0. i know that there is one to get the jeep's 4.0 up to 4.7L. if we could get our engines up to around 4.7 liters we would gain alot of torque and horsepower, so does anyone know?

 

[Concept156]

I don't know if this helps, but Vanir Technologies specializes in the 4.0L Ford engine found in Explorers and Rangers. They may be able to do a custom job... http://www.vanirtechnologies.com/

 

[tac0meat]

i dont believe vanirtechnologies has stroker kits but i just emailed them to see if they did or another way to get some bigger cubes

 

[Concept156]

Hey, tell me what you find out, cause I am looking for some more ponies from my engine.

 

[Goober]

Does anyone know what the maximum SAFE boring depth can be? .040 over, .060 over....??? Thanks.

 

[SteveVB]

Info I have says .040" or 1.0 mm which I think is a bit over .040.

Hope that helps

 

[tac0meat]

how much bigger would the engine's displacement be if it were to be bored over .040"?

 

[SteveVB]

Got my calculator out and here are the numbers for various bore sizes

Standard stroke 3.31" standard bore 3.9535 = 243.8cubic inches

with a .030 over bore the cubic inches is 247.5 cid
with a .040 over bore the cubic inches is 248.8 cid

so .040 over adds about 2% to the cubic inches.

someone on the site said they were good with the metric conversions so they can tackle the mm/ cc /L equivalants.

Bore is awfully close to 4" if you make it an even 4.00" the over bore needs to be .0465 which is a bit over the 40 over recommendation, but unless the block has some really drastic core shift may be doable. That opens up the possibilities for pistons from small block fords and chevys depending on pin placement, piston tops, etc. Food for thought.

 

[bluescat]

SOHC's too!

Not to get off the subject but for the other V6 owners as well... the people at Vanir emailed a while back in reponse to my question about the SOHC engine and they said they will be releasing new equipment and technologies for the 4.0L SOHC V6 in the near future. That includes a new book for the SOHC modded engine. That will be the first book I'll have read in a long time. I'm still driving my '94 OHV Navajo and the '01 SOHC Sport, you would never know they were based on the same engine; the German built 2.3 Liter V6 designed for Ford of Europe and placed into the old Capri model years and years ago.

 

[tac0meat]

if the 4.0 ohv and sohc engines are based on the same block would that mean that a conversoin could be done on the ohv to make it a sohc?(that would add right at 50 horsepower right there and more torque also)as apposed to spending 2 grand on bolt on mods just a head swap to the sohc would gain more power, if it was doable.
just a thought

 

[flyguy]

I heard this as well... about them being the same engine... but Im thinking that the whole engine compartment might have to be moved around though... maybe.. I dunno. Im guessing their is a reason that no one has done it... but Im kinda intrested. So whats up with this overboring... anyone know how much that costs? And lets say you bore it over .040 Do you need to do anything else? Hmmm... Im confused again. Anyways... Im always open to crazy ideas to get more power from my OHV.

nick

 

[Cameron]

Sorry guys but the SOHC block is different from the OHV block.

 

[tac0meat]

ah that sux. oh well bolt on power is always fun to tinker with . another thing, would overboring require wider pistons, cause when you over bore you are increasing the size of the cylinder?

 

[Kampy]

I don't think that anyone has a "bolt in stroker kit" for the 4L motor. If theres not one out there after 10 years there most likely won't be.

The easiest way to gain a little torque and displacment is to offset grind the crank by whatever undersize bearings can be bought. Probably .030 . Its not hard to have done, any machine shop can do it BUT, alot of figuring has to be done with deck height, dome thickness, rod angularity and pan rail clearance, etc.

Piston dome thickness and configuration would be easier to manage if the change could be made to smallblock chev parts as Steve suggested.

I've done this before to other engines. It's not hard, you just have to do your homework.

This interests me because thats the plan for mine when she goes poof.

 

[packratking]

http://www.moranav6racing.com/category.html?CategoryID=32

 

[Mbrooks420]

With the cost of doing extensive mods to the 4.0 you could probably buy a 5.0 that has already been worked. All a stock 5.0 really needs is Torque Monster headers, and an intake. Toss a cam in and get a tune, and your good to go. Even if you do increase the power of the v6 considerably the only place you will be racing to is the transmission shop.