Rosser027

Alrighty guys so I'm buying an 06 is 250 early this summer and I seriously want to make it fast as ***** so I thought hmm what about an isf 5.0 conversion... Does anybody know if it's even possible?? Like what all would I need? Thnx

DaveGS4

iTrader: (2)

https://www.clublexus.com/forums/is-...Isf+conversion

NYKnick101

Lots of money and Lots of patience! lol

If i were you, I just buy the supercharger kit and call it a day. Easier to install, less down time, less headache. (or just buy an is-f which would be just as equivalent)

idoke1

iTrader: (5)

Your best buck is to actually buy an isf. Saves you lots of time and it will be worth the extra money.

laobo979

iTrader: (5)

Yeah shoulda bought an ISF. You can find then for low as $25k now a days with some what high miles of course.

reyoasian

iTrader: (2)

Right there, is when things began to go wrong.

Moose2514

I agree... Buy a is 350 or isf and be done. Is 250 are slowwwww. And I've rebuilt about 70 engines so far for the misfire issue. Good car overall but the most important part is. Not so good

ISCjonny

iTrader: (7)

It's been done already.

Without connections within the automotive industry... Financially it is not worth it. Like everyone else said.. you're better off selling your 250 and buying a F.

But if building cars is your passion and you have a deep wallet and lots of time on your hands.. It's definitely doable.

Find a used complete ISF motor/tranny/wireharness/ecu setup. $8000+/-
Find a shop that's willing to take on the swap.
Find a dealership that is willing to reseed your F motor ecu to your current vin.
Find someone that can wire trace and merge a 250/350 body/engine wire harness to a F harness.

So yea.. you get the point.

jdmSW20

iTrader: (12)

your best bet like everyone else said would be just finding a used ISF. buying an IS250 to make it quick is working backwards