Dodge 3.9L / 4.4L V-6 Dyno test

This is a Dodge V-6 based on the 3.9 l engine but is 4.4L or 270 cubes It has W-2 cylinder heads, solid lifter Reed cam designed on a round lobe 8860 roller cam core. The intake is a Mopar W-2 M-1. I built the headers per Headers by Ed specs. The carb is a 700 cfm Holley DP.

The whine you hear before the engine starts is the electric engine pre-lube oil pump I built into the dyno stand. The test engine has no power to the starter or ignition until it has oil pressure. The electric oil pump takes suction from the engine oil pan plug and routes the pre-lube oil through the remote filter also built onto the dyno stand.

Any other questions just ask.

Category:

Autos & Vehicles

Tags:

• dodge
• 3.9L
• V-6
• W-2
• radical
• stupid
• dyno
• test

[trat50]

What did this thing dyno out at?

How many RPM?

To get 4.4L how for did you overbore..

or is that a stroked 3.9? Neat Engine!

Are there any other sources for a good intake for these engines?

(I wish there was a 3.9 Performer RPM air gap available)

[RevSearch]

@trat50

It's running a little over 7000 during that test. It has a 4.000 bore and the crank is offest ground to 3.541 stroke and honda rod journals. The intake and heads are cut down V-8.

[trat50]

@RevSearch It's quite impressive. Is that a ported "jug" magnum intake manifold? I am considering building a 3.9 myself. Was the cylinder block problem due to the 4.000 bore? Hey thanks RevSearch!

[RevSearch]

@trat50 The 5.0 liter version had a 4.25 bore. Yes that caused problems with the cylinder block, the block cracked by the main bearing webs. The head studs were long and threaded into the main bearing area of the block, into the lower water jacket area. That put abnormal stress on the main bearing web area.

The 4.000 bore hasn't been a problem, sonic check shows enough cylinder wall thinkness.

The intake is a cut down V-8 Edelbrock Victor W-2.

[RevSearch]

@trat50

400 hp. The 5.0 liter version made 440@6000 which is as high as I ran it. It would have made another 10-20 at higher RPM  but cylinder block problems shut down testing.

[bstct]

What electric oil pump do you use? Is it 12 volt? Could it run on a vehicle?

[RevSearch]

@bstct

The oil pump is 12v and is made for use on vehicles. If you search "prelube oil pump" you will find some. The exact one I used is not available anymore. The current ones appear to be based on the big racing electric fuel pumps. You could check out "accusump" too. An accusump is like a pressure tank for engine oil, they will store a few quarts of oil and when coupled with an electric or manual valve will use that oil to prelube the engine before it is started.

[kemajic1]

@RevSearch I'd like to get the extra cubes out of my '87 3.9 without going all out for top end HP. So it would appear you bored 0.090. Can you indicate what honda rods and pistons you used and where the crank machine work was done? Also any other modifications that were required. Many thanks.

[spuddud19]

sweet engine build i want to build my 3.9 to a 4.2 few other mods i heard u can use a 318's stroker kit just gonna have to throw a few things away and also have to find a diff crank and cam (was refering to the pistons/rods/etc)