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View Poll Results: Which engine would be best?
1mzfe boosted 0 0%
1mzfe leave it n/a 0 0%
3vzfe boosted 3 75.00%
3vzfe leave it n/a 0 0%
forget about the v6 & go with the turbo I4 3sgte 1 25.00%
Multiple Choice Poll. Voters: 4. You may not vote on this poll

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Old January 11th, 2006, 09:18 PM   #1
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3vzfe or 1mzfe in the mr2?

hey guys, i'm new here & i'm trying to decide on what engine i would want to swap in my n/a 91 toyota mr2 (which is currently equipped with a 5s-fe). i'm not looking for a monster since the mr2 is pretty much my daily driver in spring/summer/fall. I would eventually love to get around 230-250rwhp, but i'll be staying n/a for a while after the swap is done.... which of the of these two engines would be best for my power goal? which would cost more to get to my power goal? how well do these engines accept boost? are there any pros/cons to any one of these engines?


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Old January 16th, 2006, 12:14 PM   #2
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The 1MZ boosted will pull a lot of power, but maintenance w/ the supercharger on that sucker blows!! ESPECIALLY when it's in an MR2... you'll have to drop the engine out of the chassis if *anything* goes wrong.

I would just keep it simple w/ a 3S-GTE. You may want to look into getting the third gen revision though (flat torque curve I think? I haven't read about the 3S in a while). You can easily swap out the turbo for the new GT series (high peak and fast spool) and safely acheieve 220 rwhp. With the usual support mods, you can easily hit your high goal (or even exceed it).

The only difference would lie in the pricing. 3S-GTE are slightly more expensive than 1MZs. Plus the high compression ratio in the 1MZ almost ensures a blown knock sensor if you run it too hard or up the boost. One guy I helped out blew 2 cylinders running stock!! He simply pushed the engine too hard before it 'accepted' the s/c. His car only had 30K or so miles.

Good luck!

3VZ, is that the Camry V6 before the 1MZ entered the scene? Or is that the Tacoma engine? Eitherway, I wouldn't touch it. Boosting older engines = bad idea unless you know the whole history of how it was driven and stuff. If you keep it n/a however, then it may be ok... but is still prone to expensive maintenance if the engine does require any large jobs (drop the engine...) and 'retrofitting' engines to be different is cool, but end up costing the first few testers some extra money.

Last edited by xravexboix; January 16th, 2006 at 12:19 PM..
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