o/t New Chrysler motor question ...any MOPAR techs?

Anyone know the difference between a 3.5 and 3.5 high output motor?

Specifically can you swap a 3.5 with a 3.5 high output?

 

You talkin' Intrepid/Concord/300M ?? If so,the major difference is in the computer,everything is a direct a bolt-in.

 

According to Hollander Exchange ('99 - '01 300M, Prowler, LHS, Intrepid) you need to switch manifolds only. ECM is the same. VIN code G or V. Hope that helps.

 

What years, what models are involved in the swap? Makes a big difference. Prowlers have a better upper intake that actually does make them "HO". Older iron block motors are actually lower output than the later, aluminum block motors. But when they dropped the 3.2L a few years ago, they renamed the engines for marketing reasons (so you could still pay extra to get the 254 hp version.), even though the rating in a top-of-the-line 3.5L didn't actually change.

Give me some specfics and I might be able to help.

 

I'm actually checking for a guy I work with. He's got a 97 LHS with a blown motor and bad tranny.
From what he tells me he came up with the 3.5 High Output for kind of short money and was wondering what the difference was in the motors.
As best we could figure, the intake was different & perhaps the heads?

 

If the current motor is an iron-block, and the new motor is an aluminum block, he's best off swapping the whole engine/trans assembly, and making sure that he brings both computers with it too (they'll look similar, but the Al blocks have a lower compression ratio and different controls on the way the active features of the upper intake manifold work). If it's a really new HO (like say, 2003ish or later), then it's got an entirely different controller (engine and trans controller integrated, with a whole different kind of software that relies on different cam and crank tone wheels), and may be more trouble than it's worth.