looking to purchase a RX-7 FD
 

Hi guys

im interested in purchasing a FD
was wondering about a few things 1st however

is there a model of FD that can run on pump gas? the petrol where i live isnt the greatest and importing specific fuel or additives would be a bit of a pain
if there is such a model would it be possible for anyone to give me tips on what to look out for

Look in the FAQ sticky at the top of this section under ‘B’ for buying. A lot of good info there. Looks like you might be new to forums, but it’s considered poor form to start two threads asking the same questions...especially in the same section.

What do you consider poor fuel? Where is Longwood? While higher octane is better and safer, I routinely run 93...91 when I can’t find 93. And start being careful on 89 octane. I never go any lower and try not to drive with much boost especially in cool weather.
If the car is heavily modified or running higher than stock boost then tuning is critical.
Over the counter additives are a waste of money IMO. You’d have to buy alot of it to give any meaningful rise in octane level.

Oops sorry i didnt realise i submitted two
my browser crashed when i submitted the 1st

longwood is located in saint helena in the south atlantc
we dont have high octane fuel
just fuel you would put in your daily driver
i do however see a lancer evo's, skyline gtts and impreza's using the same fuel so i assume its an ok fuel
there is 1 mazda rx 8 on the island i do not know the driver to be able to ask them

Looks like Saint Helena is a British territory, so I’m assuming octane rating is figured the same as GB. The U.S. numbers I used earlier will probably be different since we use the average of MON and RON. Maybe one of the British members can chime in.

As I recall, those octane boosters will advertise that a bottle will raise a tank of fuel by “one point”...so if the rating was say...87, then it was raised to 87.1

thanks for that
would it be possible to run any FD's on that fuel?
i just heard that the lancer evolution 9 has to add additives to his fuel

I can’t answer that. In addition to fuel quality, engine modifications, boost level, condition of the engine, state of tune, injector efficiency etc all factor in as to whether your car will be OK to run on the local fuel which you’re indicating isn’t top quality. You’ll have to talk with others with forced induction cars and some due-diligence. Again, the way that fuel octane rating is figured where you live is different from what I’m familiar with in the U.S. And octane booster claims are misleading.
I don’t have a technical background but as I understand things, octane level is a measurement of a fuel’s resistance to auto-ignition/pre-ignition. And the rotary engine does not tolerate that like a piston engine. So get the best fuel you possibly can.

thanks for that

im am sure there is one rx 8 on island
i do believe they use the island fuel
but im not sure if theres a huge difference in the engine tolerence between the rx 7 models and rx 8

With regard to the fuel quality issue there’s one critical difference...the FD is turbocharged, the 8 is not.

oohh did not know that

well thanks for your time but i think ill keep the FD as a car for if i move to a place with better fuel

Nerdy Response on Octane Booster
 

Usually, 1 point better means 87 to 88, not 87 to 87.1...
But I don't trust them, either.

Ok, thanks for the correction Dave, it’s been a while since I considered any.
Regardless seems like that’s a lot of money in booster to get a tank of say... 89, to something like 91 or 93. I suppose if you got stuck in area with nothing but 87 and needed it out of temporary desperation, but...

i spoke to my dad yesterday he says that the octane levels here are about 85-90 he doesnt have a definite answer
would that still be enough?

Assuming you’re on the British/Euro system...no.


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