What do you think about installing an IS-F Motor into an IS250MT RWD to get the benefits of power, rowing gears, and being a sneaky sleeper.

 

Great Idea, but think it prob cost as much getting a is-f.

 

Somebody on here is in the process of attempting this.

If I could find an engine for a decent price I'd give it a shot.

 

Too much money and hassle I think

 

As far as I know there are no manual transmissions that will bolt up to the UR series of engines. You'd need a custom adapter plate or bellhousing, custom flywheel/clutch setup, and I'd probably look at using something like an R154 or V160/161 instead of the RA62, purely to hold up to the abuse. People have the parts needed to do an R154 onto the UZ series of engines, talking to the people who make that kit may be the best way to get a kit to bolt to the UR. The R154 has a bellhousing separate from the transmission case, so it is easier to change out. The V160/161 and RA62 both have the front section of the case integrated with the bellhousing.

In the end, I think it would be better to do a manual transmission swap in an IS F than to try to do a 2UR-GSE swap into an IS250 6MT. I mean you would already have the clutch pedal, etc. but beyond that not much else.

If you wanted the car to be a sleeper in the end you could always put ISx50 fenders/bumpers on the IS F. Of course there is the monetary savings of getting an IS250 versus an IS F to start with, but the amount of money spent getting the engine/getting it into an IS250 may make the extra money worth it, haha. Unless you somehow found a crashed IS F or something.

I think the easiest way to get a performance setup into an ISx50 with a manual would be to do a 2GR-FSE swap into an IS250 6MT or an RA62 swap into an IS350. All of the parts would be bolt-in. The trickiest part would be what the ECU would do without a transmission connected to it. In older cars this was not a problem, but I'm not sure what the ECU would do when it was expecting certain things to happen.

Jeff

 

^^^ well said in the end you bought a is250 not a super sport car enjoy it for what it is. if your not happy with it trade it in a 250 is not a good platform to try to get 500hp out of.

 

no good....

why dont they come out with a IS350 6MT to start with ? *Sigh*

 

Didn't Lexus do this already ????

Heavy Modifications will have to be done to the engine bay.... It's not going to just drop in & bolt up perfectly..

Joe Z

 

Because it's not 1953 anymore?

Modern automatics generally offer faster performance and better mileage than manuals.

Plus, it saved Lexus having to develop or adapt a manual that would actually hold the additional power, such development coming with additional costs of course.

 

^ I agree with you 100%, but the car nowadays have become somewhat neutered. Mainly due to the auto trannies....and the reason I still have my MR2 turbo.

 

Not practical, just buy a used isf for 48k or less, comes with warranty and reliability

 

Clearly you haven't driven the F. I would never use the term neutered for the F. And yes, see my sig pic. I've had manuals for more years than a lot of you have been alive and I've driven them since I was 6 years old on the farm. I have a pretty clear idea what the differences are.

 

damn... 6years old? were you supervised? lol

 

I have driven the IS-F, and while it is an amazing automatic, and if I had to have an automatic, or I was actually tracking the car on a regular basis (read: competitively), I might actually prefer it, as it is quite amazing.

If I was buying an IS-F though, and they had both options, I'd get the manual.

Jeff

 

Drive a C6 Z06, then tell me the ISF doesnt feel neutered. While the ISF is a gorgeous car, it's not nearly the same as having the feel and control of a true 6 spd. I know I will be arguing with my kids about this when I'm older but I love a true manual and I think I always will. I can appreciate all of the technology these days with DSG and Twin Clutch setups and so on, but theres something about a clutch pedal and a shifter that really makes driving enjoyable to me. I hope and pray that the next gen vette only has some sort of auto tranny in the Z06 so I won't feel so bad when I can finally swing a C6 version.