6G Celicas Forums

Recently have access to buying a very cheap forged and rebuild gen 3 3sge that came out of an sw20 mr2. Even with this putting out 165kw in still skeptical if this project would be worth it with the complications compared to a redtop beams. Does anyone know all the required process and wiring procedures to complete this swap into an st204?

Couldn't find any threads online and I'm just worried that problem solving on a swap like this is out of my skillset without help and spending the extra on importing a beams would be worthwhile to avoid the stress. Thanks

It should be the same process as a 3sgte swap

You could always boost it afterwards if you want more power, so I'd say it's worth it

For the MR2 3SGTE, you'll need to un-loom the harness, at least partially, and re-loom it so that it goes to the correct location on the ST204 chassis (maybe extend wires, I'm not sure), and you'll need to figure out how you want to do the intercooler.

Everything else is about the same relatively speaking. Not sure if the amount of changes to the wiring pinout is any different b/w the two, give or take considering the magnitude of the project as a whole.

Up to you whether you want the turbo power and upgrade potential, esp if the engine really is forged, or VVTI NA (with much more limited mod potential).

Thanks for your reply but it's just a regular n/a non vvti 3sge off an mr2 that has Forged pistons, rods, valves, oversized rings, piston rebore, ported head, head shaved, new gasket kit and 12000 ks on the engine since rebuild.

Yeah it would be simpler than an mr2 3sgte, the harness would need to be extended which would be a pain that i would struggle extremely hard with. unless i had some sort of a guide on the wiring harness for wiring everything to be working normally or call in an auto electrician to do the wiring for me(much higher cost).

I was more curious as to what needs to be done to get this engine running, id assume an s54 tranny would work fine and the engine itself has no problems fitting as easy as an 5sfe with the steering rack and all?
For exhaust id plan on finding some st202 non vvti headers and get the exhaust custom made?
For the speedo wiring/gauges i would have no idea how that would work with an mr2 3sge?

Would be great to find out if this is doable for me

The engine and head are the same that you’ll find in a Celica but the coolant lines are different, alternator needs to be relocated, power steering pump needs to be added, harness will need to be replaced with a Celica harness or modified to work in a Celica which is no small feat, and I’m sure I’m forgetting a couple of things. None of the changes are a big deal if you have a 3S-GE from a Celica sitting next to your MR2 3S-GE, otherwise you’re in for a pretty big headache for not that much power.

Cheers very good to know, well that makes the decision easy since finding a cheap blown celica 3sge here would be very uncommon its definitely not worth getting parts individually would be a headache eitherway.

I'm better off doing it the right way and finding a good st202 beams halfcut for the real deal and being happier with the finished product

unless that engine is free, i would run away from it like it had influenza A.

What troubles me is that you lack confidence in your skillsets. that translates into an abandoned project for plenty of frustrations. Like Richee said, its doable but at a tremendous cost. Anything is possible.

You will have to get all the parts from a 3sge celica engine, why not just get the whole engine... If you are not going to used the engine to turbo it, why do you need forged pistons. Kinda like buying a fireproof suit for Aquaman