I'm putting a canister type muffler on my car and I was going to use the flexable exhaust pipe found in the parts store. Has anyone used this stuff? Second ? is i was at my local car wash filling up my Caravan and i noticed that they sell 100 octane fuel for $4.59 per gal, anyone ever use this type of high octane fuel.?

 

What kind of car do you have? I always believe that more octance does not hurt. Most rotary owners do not want to spend the extra 20 cents per gallon. Say what you will reg unleaded lovers I just like to err on the side of caution.

 

The flexible pipe may not stand up to the rotary exhaust temps. That stuff isn't stainles or very thick and the exhaust temps from a rotary is much hotter than a piston engine.

Rotaries will not benefit from higher octane fuel, in fact they will not run optimally with it. This is driven by the size and shape of the combution chamber on a rotary.

If you search on this forum, you'll see that both of these topics get covered repeatedly.

 

84 GS bone stock

 

Thanks i'll search around

 

It's been established over and over that on a Normally Aspirated Rotary - The lower the octane the better. Save your money.

 

I know i should do a search on these topics before i post, but seeing i read all of this while working it's kind of difficult.