I tried searching for this, but my browser's screwed so it wouldn't work. I just need to know whether an 89-91 RX-7 Turbo requires regular or premium unleaded. Another question, how managable is an FC in the winter? Thanks in advance for the info!

 

regular.

the fc is fine in cold weather...just like any FI car.

Do you mean how well does it go in snow? Not great. not as good as a Fwd, but its very predictable, so it works allright with some good winter tires. however, its a pretty nice car to be beating around in the snow....

pat

 

i have an 87 base rx7 and a 90 TII and i was told that in the boosted one you should run premium and in the NA unleaded is recommened. i read that in an NA rotary the higher octane doese nothing for your car. it will still run the same.

 

regular? no.

premium? for turbo, always a yes.

i've been told to run premium in any FI car for the cleaners that they put in it, but my 89 GTU runs noticably better on regular. I'll save my $3 per fillup and run some other cleaner.

 

c16 !!! yea .. when i am boosting 25 psi

87 regular for n/a
93 for turbo daily driving....

 

n/a was factory tuned for something like 82 octane... anything else is overkill, i run 87 which is the lowest i can get

as far as i can remember, lower is better... at least for the n/a

 

boy its surprising how many of you dont k now what you are talking about.

stock TII.... 87 octane. 89 if you like to worry.

read your owners manual. the TII was designed to run on regular pump gas. so was the NA. Only modified TIIs need to run higher octane.

I run 89 in my high compression TII @ 12psi, ~350-375 hp.

pat

 

however he never mentioned whether his car was modded or not and most of us have modded rx7's even if it's just intake and exhaust your still going to be boosting alot more thus making the chances of detonation even greater. Reason why most of us use premium gas is because the higher the octane the less chances of detonation and pinging due to higher boosted cars.

 

agree witth HONDAHATER, most people should know that the higher the compression the higher the octane you should use. my 88 Golf is a 1.8 8V, with 16V pistons which cause of the 16V having no dish to the pistons im running a 12:1 compression, it has to run on 110 octane, anything lower and it starts pinging like a sumbitch, most people running turbos should only be at a 8:1 or 9:1 comp., anything else is just askin for a blown head gasket unless ur boosting under 7psi. so yea you can run regular on a turboed car stock and modded.

 

turbo=premium

 

they dont "require" preminum gas till s5 turbo

 

How the hell does it not blow up?

 

^ditto

 

man, my turbo II didn't come with an owner's manual, just to mention. higher altitude equals lower octane, i think it is lose 1 octane point for every 1,000 feet but don't take my word for it. this is very important in OBD II cars unless you want a check engine light.

 

i thought it will always be better to run premium gas?

 

My s5 says on it to use 92 octane or higher. Maybe they changed for s4 to s5 or somthing else. For na's use the cheap stuff. On turbo models i recomend using 92/93 but it is ultimatley up to you.

 

i have looked at mine and it has stickers saying 92 octane or higher only

 

mines a 10AE and it reccomends at least 92 and as far as i know thats premium right

 

very funny

i used 87 in this car with stock turbo/ecu, and just the custom internals. when i upped the boost i switched to 89, have been using that for 15k miles through all my later mods. there is no need for high octane on a properly tuned rotary under 15psi. if you have the stock ecu, and lots of mods, then yes. or if you run over 15 psi, then yes. otherwise, no, unless you are just unsure of your tune.

actually it is the opposite of this. it is best to run the lowest octane you can without pinging. lower octane fuel has more energy per volume.

pat

my mods by the way

 

Cool, thanks for all the input. Here's another question: the FC RX-7 TII is supposed to get 16mpg city/24mpg highway. Is that about right, or optimistic?

 

it depends quite a lot on how you drive, but for most, thats optimistic.

 

yup...i'll have to agree with u on that....i get 17 to the gallon..and i take the local highway(no lights til i hit campus) and just far enough to warm up the car....so i pretty much dont boost at all....

 

ask mr spacestacian (aka biggest idiot known to mankind)


https://www.rx7club.com/showthread.p...ighlight=sheep

 

I think that statement is a little too broad. I would never run 89 octane on a stock turbo and TMIC running 14 psi, even with my Haltech. You will pop your motor, guaranteed.

Rotaries have very little resistance to detonation and IMO the extra $.30 per gallon is worth it if you are modded.

 

hey patman.....any tricks on how to run 89 or 87 modded?...im thinkin i'd wire in a misting kit just incase....