I couldn't find a thread on this topic. Does anyone know if premium fuel needs to be used w/ the supercharger?

well, based on my calcs the engine WILL require the permium fuel... so you can figure an extra $15 / month in fuel costs...

dont all F/I cars require premium gas?

actually, quite the opposite is true... most carburated cars require premium... not your mom's station wagon, but most performance non-F/I cars are gonna require the stability that premium offers... the unstable engine temps and lack of knock control cause pings / detonation to be a problem...

I don't even think that the Civic Si requests permium... it isn't until you get to compression ratios higher than 10:1 that you start seeing the need...

(caps on purpose)

PUTTING 93 OCTANE IN YOUR P.O.S. CAR WILL NOT MAKE YOU GET BETTER GAS MILEAGE OR BETTER PERFORMANCE... THE ONLY TIME THIS WILL BENEFIT YOU IS WHEN YOUR ENGINE IS TAKING STEPS TO RETARD PERFORMANCE DUE TO OTHER FACTORS... anyone who tells you otherwise is foll of crap...

higher octane doesn't mean there is more power per gallon, it means that the fuel is more stable and can be pushed to higher limits and the properly setup engine can burn more fuel safely... but your lawn mower or '84 Bonneville will not benefit... PERIOD

fuel injection is inherently more stable than carbs...

nah i use regular in my Si... my dad's V6 legend uses premium though. it's non f/i as far as I know.

i have the 3.4 in my tacoma with the trd supercharger and they recommend 93 octane. i have recently put in the 89 but i haven't got on the throttle since i put it in. no problems as of yet.

silly question: i read the user book, is it 87 is good enough for the box for now? since it has a little engine and little power, my friend told me use the 93 when it get older, and when i hear the engine knocking..

silly question: i read the user book, is it 87 is good enough for the box for now? since it has a little engine and little power, my friend told me use the 93 when it get older, and when i hear the engine knocking..
I did a google searh "high compression" "premium fuel" and I found this link:
http://www.thecarconnection.com/index.asp?n=163,212&sid=212&article=3031

This paragraph is near the end There is one thing, though, that could cause your late model, regular-fuel car to need a higher grade gas: age. As an engine gets older, carbon build-up on the tops of the pistons effectively increases the compression ratio - which in turn means you may find the car knocks when you use anything but mid- or even premium-grade gas.
I have never been to that site before and I can't vouch for it's accuracy, but it seems to make sense based on my automotive knowledge.

I'll give them that one... their specific case sounds true, but cheap gas and a carbureted engine - this might happen, but a clean burning engine will not see this...