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Discussion Starter #1
We all know that the IS300 has a very strong engine that can handle forced induction pretty well (judging from the supra at least). But i was wondering how much life would it take out from the car in terms of mileage. I know a lexus can go to 200,000+, but will the supercharger (lets say running at 6psi) ruin the longevity of the engine? When I buy the IS, i plan on keeping it for the lifetime of the car (or at least until 120,000-140,000 miles), so is it a good idea to throw in a supercharger? Im not gonna street drag race the thing everyday, but just show up some acuras once in a while..
 

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if you are doing it with very low boost, like 5psi or so, you should be fine. The block itself will held as long as the car, it is the seals and bolts you need to worry about. I think a mildly boosted engine should last 120K without problem.
 

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using this as an example, i think Jackson Racing warranties their superchargers (Eaton based) for 100K miles. After 100k, that's anybodies guess.... You should post this on the Toyota MR2 forum (does that exist?) and ask supercharged MR2 owners (88-89) and turbo'd MR2 owners (91-94?) how long and how strong their engines have been holding up... .02
 

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Discussion Starter #4
Thanks for the info... do any of you guys know how many PSI will the TRD supercharger be running? It should be pretty low I assume since they are putting it under warranty... im not sure though...
 

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Well I can tell you that stock supercharged MR2s seem to run forever. The old 4A series engines are "bulletproof".

The 2nd gen MR2s were pretty good, but not as indestructible.

The Supra engine (and IS300 engine) in the 2J family are also considered "bulletproof" and if left stock tend to run forever.

I think the main problem with aftermarket forced induction is that people screw up the air/fuel ratio, or overboost to the point of detonation which will eventually kill any engine.
 

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We still don't know what sort of warantee L-Tuned/Kaizuma/TRD will offer on the supercharger (assuming that it does get produced). Based on what I have seen elsewhere, they would probably limit boost to <8 for emissions reasons.

My guess would be something like 6 psi with 270hp...
 

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Discussion Starter #7
6 psi at 270 HP doesnt sound bad at all. I just hope the TRD kits is within my budget... But what about the MPG.. you think it will drop a little?
 
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