I am seriously thinking about doin the 3rd gen 3sgte swap into my 91 na. I know that the wiring will be somewhat of a problem, but im not worried. I am strongly thinking about getting the clip so i have something to work off of. I am aking for your suggestions on this. Should i get the 3rd gen clip, or juss get the 2nd gen full swap? i was thinking i could do the 3rd gen and not do ne major mods yet, or the 2nd gen and do whateva mods i can with the rest of the money.? Sugesstions PLEASE!
If you are looking for big power, the Gen IIIs are known to crack.
If you are looking for moderate power levels (under 280 rwhp), there is no justification for GenIII's and the rarity of their parts. It makes more sense to buy the cheaper GenIIs and have parts readily available.
If you are looking for a solid 280-320 rwhp and want it easier on the engine, then ... and only then, do the GenIIIs make sense.
I think people just get too hung up on being able to say they have "JDM" or "GenIII."
Interesting! Being new to MR2s, i never knew GenIIIs were known to crack. Thanks for the info too. I've been reading some of your infos on your site every now and then for the past several years now...it's cool to finally have an MR2. -Ferry
If you are looking for a solid 280-320 rwhp and want it easier on the engine, then ... and only then, do the GenIIIs make sense.
When you say easier on the engine, what do you mean by that? My goal is 300rwhp and I have been intending to go with a genII clip. Is there a reason I should I be looking at genIII instead?
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"Our Lady of Blessed Acceleration, don't fail us now!" -Elwood Blues
I doubt 3gens are known to crack, I knew this guy who I was going to a mr2 with no running gear owned a gen3 was running it at 30psi and melted his pistons, but his engine didn’t crack. So that cracking business is just a myth I think. Those engines are so rare you don’t even get them blown as frequently as the gen2s .
all i can say if u come accross a gen 3 grab it quick
I doubt 3gens are known to crack, I knew this guy who I was going to a mr2 with no running gear owned a gen3 was running it at 30psi and melted his pistons, but his engine didn’t crack. So that cracking business is just a myth I think.
Pardon me while I resent your post.
I think I have established my reputation enough in the MR2 community that I don't need to justify my words;
however, your uninformed post has inspired me to respond (click underlines for links):
Well tonight I took my head off to see the damage and to my surprise the head was not cracked and the gasket was perfectly fine. I have a hair line crack right down cylinder #2. Overheating? Cold water in hot engine? What do you guys think?
What power i get from all this is anyones guess. But i am very concerned about the issue of the block possibly cracking. I read flupstars information from ages ago about them cracking and was wondering what can be done to prevent it, if its actually a risk at my power goals?
There has been alot of talking the united kingdom about the thin wall version of the jdm generation 3 mr2 engine. Toyota never admitted there was a problem but there problem is there. many builders have found cracking of the block between 2-3 pistons.
im looking for someone who has done a fair bit of tuning on there rev 3 engine, im running 87mm hks pistons along with eagle rods, water injection, hks 1.6mm head gasket, arp head studs, etc etc the gasket went twice on me which i thought was a problem with the head but upon closer inspection the block is cracked!
Pat, not only is it a stupid thing to do to contradict somone who is clearly highly respected here (and elsewhere) but it's very irresponsible to go telling people to buy an engine that is known to blow itself up.
Forums aren't places for you to post your opinions, they are places where people go seeking advice. Real people with real money and time on the line. What if someone read this thread before Hyde responded (above) and took your advice and ran out and bought a g3 block. What if they then dropped thousands of dollars into it and spent hours installing it only to have it blow up on them.
What would you say to them then?
"Oh, I thought it was a just a myth. Sorry."
Thank you all very much for all the help....i think you have changed my mind from the 3rd gen clip to the second gen clip... i definitly dont want my motor to blow up. One more thing though, if the 3rd gen is modded say with IC, intake, full exhaust, boost controller, and possible FCD. How long do you think it will last, or is that too much?? Thank you all once again.
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3rd gen. 3sgte into 91 mr2 - Advise?
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