1998 S70 T5 engine compatibility question

[V_T5]

I found another S70 T5 with a blown engine. The body and interior is mint, and I'm pondering the idea of swapping a good used running engine into it. I was wondering what engines from other models(v70, c70, etc.) would be a direct swap into a 1998 S70 T5. 6th and 7th digit of the vin # is 53. I figure if there are other compatible engines from other models, it would broaden my search for a swap. Thanks

[erikv11]

94-98 turbo engines will swap directly, from an 850 (94-97) or an s70/c70/v70 (98).

Fine print: depending on the emissions setup on the donor engine, you may need to swap some bolt-on things like the manifold, or get rid of the EGR on the donor, etc. If the donor is a 97-98 LPT (the GLT models from those years), yes it will still swap over just fine, keep the turbo that is on the T5.

People also swap in some newer turbo engines (up to 04 or so) but that requires some modifications.

[FLXC90]

If you put a LPT motor in a T5 (HPT) car, don't you need the LPT ECU? due to static compression?, Or will the LPT motor live with the cross-breeding?

[erikv11]

You don't actually need the LPT ECU in that setup. The LPT engine does just fine when paired with the standard T5 ECU and turbo (the 15g turbo), as you would have if you put an LPT engine into a T5 car.

Swapping the T5 ECU and 15g onto an LPT has been done by dozens of people (including me) with no ill effects, as long as it is run unmodified i.e. as long as you stay at standard boost pressure. If you up the boost, the internals are vulnerable due to the higher compression ratio of the LPT engine, people have bent rods that way.

Oh, you also want to keep the injectors matched to the ECU - keep the white fuel injectors that come with the T5.

[V_T5]

thanks everyone for the replies.

does it matter if the donor engine is from a car that had an automatic or manual transmission?

[clifford06]

Greetings. VT5, you are asking just about what I have " What else fits". 2.3 HPT engines ( 53 vin) are hard to find running or not. The closes one to me is nearly 500 miles away. Locally 2.4 LPT are plentiful , running.
When I ask most indy techs say fuel management is different and would not match and ECU would not read correctly. My car is a 2000 T5. Would this type of swap work for me, if not what would ? I know want to stay with a coil pack system to avoid extra modification.

[erikv11]

... does it matter if the donor engine is from a car that had an automatic or manual transmission?

Nope, matters not one bit.

[erikv11]

Greetings. VT5, you are asking just about what I have " What else fits". 2.3 HPT engines ( 53 vin) are hard to find running or not. The closes one to me is nearly 500 miles away. Locally 2.4 LPT are plentiful , running.
When I ask most indy techs say fuel management is different and would not match and ECU would not read correctly. My car is a 2000 T5. Would this type of swap work for me, if not what would ? I know want to stay with a coil pack system to avoid extra modification.

With a 2000 you can not swap ECUs around, you are stuck with the one in the car. Luckily you have a T5 already.

For a 2000, you can directly swap in a 2.4 LPT with no issues as long as it has VVT like yours; probably any 99 or 00 will have that but check when you find a candidate, or maybe Mike (precopster) or someone else will chime in here. As far as fuel management and related issues, the point here is to swap over from the existing engine injectors and intake. Basically swap the long block but neither of the manifolds or any of the accessories.

[clifford06]

Thanks, that good to know. That drive (one day turn around) dolly rental , tow prep, storage is a killer. Will performance be different ?

[erikv11]

The 2.4 engine with the T5 turbo (so that is a 16g turbo for years 98-00) bolted on will have slightly better performance than the 2.3 engine with the same T5 turbo.