Following Greg S's thread (larger throttle body?
) I've become fixated on the supercharger idea. The TRD version was a massive failure due to shitty quality, but the concept here is to see if a reliable OEM style unit is workable. Here's what I know so far:
* Eaton M45 or M62 superchargers are the best fit for this engine, with M62 probably being better, but the M45 being slightly physically smaller.
* Gen 4/5 superchargers are significantly better than Gen 3 models, but at a somewhat higher cost.
* The xB has a "fake" pulley (just there to wrap the belt around) where the power steering pulley would be on the Camry/TC. This pulley might be removed and a supercharger mounted to take its approximate place on the back of the block.
* Front, top, and rear mounting might be possible (way too early to know).
* Intercooling is a good idea, but might be optional depending on design and needs (the TRD one didn't have an IC at all)
Parts that would be needed (speculative):
* Bypass valve (to prevent overboosting)
* Mounting brackets for supercharger (must be hand made, no one that I know of makes these)
* Belt (unlikely you could fit it just right enough to use the OEM belt)
* Intake and exhaust pipes to hook up to OEM throttle body and intake
* Upgraded injectors (440cc-ish if you're aiming for numbers similar to the TRD supercharger).
* Some kind of management. It might be possible to use the TRD flash (would need a map on that SC to compare), or perhaps a SSE (split second enrichment module) would suffice. I don't think a "full on" management system is needed unless you're going for a lot of power.
* 1 step colder plugs
* Gauges (wideband AFR and boost; these are just mandatory for any
My ideal setup:
* Max of around 5 PSI for reliability and lower costs (no full management, no upgraded engine internals, automatic transmission safe, etc.)
* No engine removal necessary for installation and maintenance
* Cost kept to a minimum (all major parts can be sourced used)
* Bracket fabrication kept simple enough that anyone can do it at home with a drill press and angle grinder.
Why do this?
* Cheap - I think this can realistically be done cheaper than any reliable turbo setup, assuming a suitable mounting can be done. Lots of others have done similar DIY builds on other cars.
* Interesting - I don't think this has been done before
* Fun - I like projects.
But superchargers suck, right?
* Yes and no. There's no question that a good turbo will outperform a supercharger on a small engine, but I'm all about the "OEM upgrades", and I don't think there are any turbo options that fall into that category (I've spent a lot
of time researching). A supercharger can still be lots of fun, but it's definitely a compromise.
This is totally
guesswork, and like all other things, I'm going to use this thread like my notepad. I've got some sweet ass tax return cash on the way and I think I'll throw a few hundred bucks into mocking things up, and I already have colder plugs and 440cc injectors sitting here on my desk from when I had started to take an interest in turbos. Lots more crazy notes to come and I continue research.