Is any one running a built lower end on thier 4.0 sohc. I'm looking for piston and rod options and wondered if anyone has stumbled upon any off the shelf combinations. I am aware of Super six's combinations and was wondering if anyone out there has come up with anything else. My ranger has a 3.0 but I am running a 4.0 in my 05 Mustang. I have swapped in a M122 blower from a GT500 and I'm making 14.5 lbs of boost. It's making somewhere north of 325 rwhp but needs to be re dynoed as it's making more boost now than it was initially dynoed at. It's intercooled but with the stock bottom end I realize I'm on borrowed time. The combination has been up and running for 8months and as of yet have no issues.

Here is a picture of my setup.

 

hot damn! Would love that sort of setup in a 2wd dropped Ranger!!

Check out these guys too...

Tom Morana Racing Engines

 

Dang that is hot. This makes me second guess my 2.3t build....

 

damn thats sweet how many pounds of boost do you plan to run with a built bottom end?

 

probably 17 max. I have to concentrate on cooling it down this winter and will go with a water meth kit.

 

Borrowed time huh! I would use that term lightly... I would also use the pedal lightly as well. As I know it they are working on the build kits but I have heard of nothing bein released yet... Good luck man. Great upgrade, but SVT needed to finish the project. They were supposed to have the complete lower end upgrade out already. But, the slackers must be laying down on the job...
I have been curious as well. This was going to be an option over trying to find a junk 4.6L for my ranger. I have already had one in a Expedition, that I loved, however with the exhuast bolt issues they have I liked the screw drive supercharger option better... But again. No build for the lower.

 

Hey popeye, welcome to RF. I`ve been watching your progress on the collective for a while now. You might want to pm a member on here that goes by nickstersvt, he might have some info for ya.

 

Hey what's going on. I just picked up a set of weisco pistons from bscottie and I'm gonna use a set of manley rods for my combination. The rod is a little longer than stock so I'm gonna shave the pistons and machine them for floating wrist pins. That should give it a long rod effect and be a pretty good combination.

 

Are you saying that SVT was working on a lower end assembly for the 4.0???? That would be great. I keep my foot about half way into it and keep the boost around 12lbs. It's fast enough to have a lot of fun as the boost comes on VERY early! The combination has actually eaten up my 5R55 trans. Getting some very lazy 1-2 shifts. I hear you on the 4.6 swap but everyone is doing that. I enjoy the difficult road. People are a lot more impressed when they look twice and see it's a 4.0.

 

As far as bottom end strength goes, isn't Roush doing a turbo on that motor in a Turlinga commemorative package with 343/rwhp

 

PM nickstersvt...he has your answers.

 

Geeze back when I was on MF, (I had an 06 V6) guys were stating that the stock bottom end was good for 400rwhp+....
Also these guys had the T5, not the auto.
Talk to rygenstormlocke, scrming, or afixer on mustang forums......those guys were the badasses when I was in it

 

Between what D told me... and what I saw with my 06... the stock bottom end was clean up til 5800rpms. Even with a ASP crank pulley it just wasn't clean over those rpms.

IMO (on a stock block) keep the shifts down below that 5800 limit and don't give it too much boost / heavy load below 2500. I'd also suggest using the best possible oil to prevent the rod bearings from contacting. (RP full synthetic)



When you go built I'd suggest a girdle on the bottom end and do a 4-5 day TQ retention validation on the head studs. These castings are thin and will relax. Don't just try to take a short cut and over tighten them! Do a soft 40lb TQ on day one and let it sit for 24hrs. Then on day 2 TQ them (ARP studs w/the special grease) up to the ARP specs. Then repeat every 24hrs in 5lb incriments until they all hold at the specified TQ value. Oh and use all metal gaskets that are copper sprayed.

If there is any way you could add some cross bracing between the blocks banks (in the "V") that would be good too.

These things are a short stroke engine. So the stiffer you can make it and the higher you can rev it.. the better.

Rich

 

someone mentioned the terlingua from shelby. do some research on that and see what you come up with. maybe even getting some parts from them if they have any available.
i thought about how sweet a reg cab ranger with a blown 4.0L and a 5 or 6 speed thrown in would be. of course. it'd br dropped and have a wcked paint scheme to go with it.

good luck with your build.

rich, you mention about how much rpms the stock bottom is good for but what about the horsepower rating?

 

nickstersvt is selling his built 4.0L