Hey guys, ive was suprised to find the lack of interest scanning google on people putting a 350 engine in a 250. I might be totally missing something (engine wont fit) but i thought they matched up about evenly for engine space/size. Honestly any help recommendation on how it works or would work, would be great, just want to do a straight up swap Auto/Auto.

-Thanks, Mike!

 

Should be no problem to physically fit... but unless your 250 engine is dead it'd be cheaper to sell the 250 and buy a 350.

The engine and transmission... and rear end... are all different... so you'd need to buy and swap all 3 for everything to work right (and buying all the relevant ECUs and electronics to swap)

You'll also want to start with a 2009 or newer 250, since a 350 ECU is going to be expecting VDIM on the car, which 06-08 250s didn't have.

 

Im with kurtz on this one, or unless you have a manual 250 and want to have a manual 350)))))))

 

In which case he'll need a way to make the ECUs not freak out when the transmission they're expecting to control and talk to isn't there anymore.

 

No mas........

 

Isn't there a separate Transmission Computer from the main ECU?

 

No, it is one ECU for both.

Jeff

 

what about 250awd to 350awd. engine swap and ecu swap? what issues am i looking at?

 

I agree with this ^^^^^

Much less hassel. If you want a big project car, seems like the 2nd gen IS is not the way to go. Not much to tinker with under the hood...