Help!! Engine Swap possible? 350 engine into 250.
08-29-12, 01:04 PM
#18
Honestly as far as engine swaps go, doing a 350 engine into a 250 is probably one of the absolute easiest swaps you could ever do. Almost everything outside of the drivetrain on the car (electrical and otherwise) is identical between the cars. You can buy/get every part you need and just bolt it in, nothing custom required.
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
Last edited by Jeff Lange; 08-29-12 at 01:10 PM.
08-29-12, 01:08 PM
#19
There are a lot of resources online for junked IS350 parts. I have seen a lot on sale for engine/transmission etc. Most of junked IS350 were due to front end or rear end collison, so you may get the parts you need without problem. The problem would be the cost getting them and put together.
08-29-12, 01:42 PM
#20
Honestly as far as engine swaps go, doing a 350 engine into a 250 is probably one of the absolute easiest swaps you could ever do. Almost everything outside of the drivetrain on the car (electrical and otherwise) is identical between the cars. You can buy/get every part you need and just bolt it in, nothing custom required.
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
Cheap, not so much.
That's kind of the point. It's cheaper to get a 350 to start with than buy a 350 engine, transmission, rear end, and all the relevant ECUs, plus cost to install them (unless labor is free- by which I mean you not only do it yourself, you put no value on your own time)
I'm also unclear how you'd get the 350 ECU to be ok with the 250 transmission given you can't reprogram it.
08-29-12, 02:09 PM
#21
Oh I agree it's certainly not cheap, in fact you are definitely better off to sell the car and get an IS350 and/or trade in for one. For the 2009+ cars, the only computer that is different is the Engine ECU between the IS250 and IS350, earlier cars are more trouble due to the VDIM, but I'd put money on the IS350 ECU not caring about it and reacting to not having VDIM just fine, but that's no guarantee.
As for the transmission, the electronic controls between the A760E and A960E are the same. (Same number of solenoids, same part numbers for the solenoids, same revolution sensors, same wiring.) They are both controlled in the same way, the difference is mechanical for the most part.
A lot of engines I've seen for sale come with the wiring harness, ECU and transmission. I'd be curious to know if the front half of the IS350 driveshaft will match up with the rear half of the IS250 driveshaft to avoid needing to do a differential and subframe swap.
Like was said: possible, but expensive.
Jeff
As for the transmission, the electronic controls between the A760E and A960E are the same. (Same number of solenoids, same part numbers for the solenoids, same revolution sensors, same wiring.) They are both controlled in the same way, the difference is mechanical for the most part.
A lot of engines I've seen for sale come with the wiring harness, ECU and transmission. I'd be curious to know if the front half of the IS350 driveshaft will match up with the rear half of the IS250 driveshaft to avoid needing to do a differential and subframe swap.
Like was said: possible, but expensive.
Jeff
Last edited by Jeff Lange; 08-29-12 at 09:13 PM.
06-21-13, 03:28 PM
#24
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Honestly as far as engine swaps go, doing a 350 engine into a 250 is probably one of the absolute easiest swaps you could ever do. Almost everything outside of the drivetrain on the car (electrical and otherwise) is identical between the cars. You can buy/get every part you need and just bolt it in, nothing custom required.
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
If you kept your 250 transmission and differential the swap is even easier, though there may be a couple of chances needed to get the 350 ECU to control the 250 transmission properly. I doubt there would be much concern about it though.
Jeff
06-21-13, 09:41 PM
#25
mind you.....cost is gonna be high, but will it be as high....just madly curious on opinions out there
06-22-13, 04:07 PM
#26
Also, I'm not sure if they started with a 6speed car and added the 350 engine or if they started with a 350 and added the 6 speed parts/gearbox.
Last edited by B16da9; 06-22-13 at 04:12 PM.
06-22-13, 08:18 PM
#27
There were no M/T cars in Japan, they were all auto. They started with an IS350 A/T and swapped in the M/T.
The issue is that the VIN does get programmed into the ECU and it needs to match/communicate with the other ECU's in the car, which means using a used ECU might be hard/out of the question.
Running a Japanese ECU in a North American car may not work either, since there are the VIN differences and there are also key frequency differences as well I believe.
There's no entirely simple answer here, but I would think if anything, getting an ECU/key set or something used from eBay and then trying to do something with that would probably be one of your best bets. Not entirely sure how some of the other ECU's would mate up to the body wiring in the IS250 M/T though.
I am still looking into this (as a hobby/curiosity), as one day I would love to swap in a 2GR-FSE into my IS250.
Jeff
The issue is that the VIN does get programmed into the ECU and it needs to match/communicate with the other ECU's in the car, which means using a used ECU might be hard/out of the question.
Running a Japanese ECU in a North American car may not work either, since there are the VIN differences and there are also key frequency differences as well I believe.
There's no entirely simple answer here, but I would think if anything, getting an ECU/key set or something used from eBay and then trying to do something with that would probably be one of your best bets. Not entirely sure how some of the other ECU's would mate up to the body wiring in the IS250 M/T though.
I am still looking into this (as a hobby/curiosity), as one day I would love to swap in a 2GR-FSE into my IS250.
Jeff
Last edited by Jeff Lange; 01-04-16 at 08:58 PM.
06-22-13, 08:20 PM
#28
I noticed that you commented stating that the A760E and A960E transmission are pretty much the same. I have a 2006 GS300 and it currently has a A960E transmission which has gone bad. I found a A760E transmission on craigslist, could I swap mine out with a A760e without making any modifications? Any help would be greatly appreciated.
Jeff