Realy Silly Q But Must Ask About Fuel

[f.i.t.]

hey everyone just goy a stock as a rock ke55

 

what fuel should i use???????????????

 

do i have to use a valve saver fuild or not??

 

i had a gemini and i neva had to in them as the alloy head so would want to make sure what i should be useing in the ke55

 

thankz

[SLO-030]

91 octance will be fine in a stock 4K

 

No valve saver needed. Alloy heads have hardened valve seats from factory. Japan went unleaded back in the 70's or so i've read :hmm:

[altezzaclub]

I use 95, and I'm thankful its cheap as a subsidised 10% ethanol blend! 91 would probably be OK for stock, but I skimmed the head when it was off and don't have to worry about detonation with 95.

[SLO-030]

I run 98 in my 4K. But that does have minor head work and a reasonably big cam.

[LukeAE71]

I run 98 in my fresh 3K, runs like a dream.

 

Might just be my imagination but I swear it goes further (better economy) than when I used 95. :blush:

[GJM85]

I sat down and punched out the math once upon a time...

 

your car uses 10% ethanol based fuel 27% faster than 98 octane fuel and 98 does not cost 27% more. Therefore it is more economical to use 98 octane based fuel and drive efficiently than it is to use 10% ethanol blended fuel and drive efficiently.

 

That was based on my 04' Camry with a 2A-ZFE engine, manual transmission.

Edited January 3, 2011 by GJM85

[beerhead]

With a carby motor just set your timing advance based on the fuel you buy. Unleaded 8-12 deg 95ron - 10-15deg 98ron - 15-20deg (depending on engine mods of course). With my old 4K I found with the timing advanced a touch as above I'd get much better fuel economy with 95 or 98 ron fuel.

[greenmac80]

i use 98 fuel. in all my cars jst tune to suit.

[f.i.t.]

ok thankz for all the imput 98 it is i will tune it better when i get a webber on the old girl n exasut

[Evan G]

98 and 12-15 degrees of timing ftw!

[f.i.t.]

can u just leave timing the way it is n just got a good fuel in for if i play with timing will it go better n be better on fuel????

[ke70dave]

i understand what your saying, but please don't use 'n' as a word. its not a word.

 

just chuck in 98 fuel, and wind the timing up a tad. take your car to a big hill, drive like you normally would up the hill and see if it pings. if it does, wind the timing back a bit. and try again.

 

note it is not unusual for a "normal" engine to ping under very heavy loading (4th gear, 2000rpm, foot to the floor, up a hill). but then again you shoudlnt be driving with you foot to the floor in 4th gear at 2000rpm. so thats ok.

 

in genearal:

 

more advanced timing = more power for the same rpm, thus you can use less accelerator to move your car, thus you use less fuel.

Edited January 4, 2011 by ke70dave