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Old 02-09-2007
b3kbruiser's Avatar
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I am: Chris McLastname
Join Date: Nov 2006
Location: DFW Area, Tx
Vehicle: 2007 Ranger XLT
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2v to 4v conversion?

The 390 in my F100 is the 2v model, and rated at 265hp and 360ft lbs of torque. The 4v is something like 350hp and 400ft lbs of torque, so I'm thinking, is there any way to do a 2v to 4v conversion? It seems to me like it's just involve finding matching heads in good shape from a junkyard 390 and swapping the heads, it's also be a good excuse to make sure the head gaskets are good. Would I need to swap the pistons out as well?
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Old 02-09-2007
I am: Jamal Wilson
Join Date: Jul 2005
Location: Las Vegas, NV
Vehicle: 2004 Ford Ranger XL
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It would involve a little more that just swapping out the heads. their not talking about the valves in the heads, it's a complete different shortblock when they say 2V, It's Ford 2-barrel carburetor which flows 351 cfm and uses regular fuel because the pistons give a lower compression ratio (9.5:1) than 4V engines. That's why the 390 2V is only rated at 265 bhp @ 4100 rpm. If modified for performance, 4V pistons and other pieces from that engine must be installed. the 4V had higher compression ratio and required premium fuel I beleive. standard 390 4V had 315hp & 390 4V GT had 325 I think
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