[smashstang]

i was wondering if i put some vp race fuel that a sunoco sells at the pump near my house, if i but up the timing will i see a big difference? my car is a 89 lx fairly stock, typical intake, edelbrock mass air meter, headers, catted h-pipe, flowmasters.... and if so how much timing should i advance it???

[93hatch]

whole points so you can run more timing/boost without detonation, i highly doubt itll help you at all

[smashstang]

run more timing... like i said, u dont think it will show any difference?

[93hatch]

personally, no, i dont, but let a more experienced member chime in

[built351w]

what is this "race gas" is it just the ultra 93??? Or is it $7.00 a gallon CAM II 110 leaded????

if it's just the 93 octane I really doubt you'd see a difference worth your while.... Pretty sure it tells your to put a minimum 91 octane in those anyway from the factory right?

[JBIGBOOTSY]

Leaded gass and cats dont mix, also, over time it will kill your O2 sensors.

[k2boarder3187]

Originally Posted by smashstang run more timing... like i said, u dont think it will show any difference?

oh reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeealllllllllly yyyyyy

[k2boarder3187]

gimme some bologna skins and a tank of cam II and ill wipe your ass all over the place

[GoodOleBoyzRacin]

race gas burns slower than regular so it is more efficient in the combustion process. more timing will make more power but not worth paying fer race gas IMO without more mods. and to answer yer ? yes it would allow you to run more timing but its just not worth the $$$ at the pump

[JBIGBOOTSY]

Originally Posted by GoodOleBoyzRacin race gas burns slower than regular so it is more efficient in the combustion process. more timing will make more power but not worth paying fer race gas IMO without more mods. and to answer yer ? yes it would allow you to run more timing but its just not worth the $$$ at the pump

Its really less efficent. it burns slower, but also has a higher resistance to detonation. With no changes in timing, higher octane will make less power.

[GoodOleBoyzRacin]

true. because you need more timing, boost or somethin else that will make it start burning sooner because it does burn slower. if not it will not burn enough and in result will be like retardin yer timing, the gas wont have enough time to burn and the "explosion" will try to push against the rotating mass. and i think the word i was looking for was combustible. not efficient. my bad.

[smashstang]

the fuel i was refurring to is 110 octane, so to sume up everyones answers, the answer is yes but for a fairly stock car it wont be worth the price.... also how well does 110 octane and nitrous work together?

[neverfastenough1]

Yes, bumping the timing will allow you to use higher octane fuel. That is how tuners and chips work. They bump the timing to allow you to burn higher octane fuel which in turn is more efficient which means better mileage and more power. Bumping timing and using low octane fuel means the explosion will occur too soon and cause detonation. Not bumping the timing and burning high octane fuel means the explosion is occuring too late. Meaning the piston will be on the downstroke already and less compression in the cylinder= less power and poorer fuel economy.

[Sleeper_Stang_89]

its not worth it to run race gas in a street car....especially a pretty much stock car... I run 93 octane in a 331 that makes 500 + hp... of course its tuned for 93 octane but like mentioned above not worth it... use the extra 2-3 per gallon and save for a supercharger or other mods

[ryans88gt]

110 is usually leaded fuel.

that is a nono.

For one it is illegal to use on the street.

For two it will ruin you O2s and your car will run rich from then on

If you have a carb, then it's a different story.

[Hunt_chevs]

i use 100 from time to time,... car is slightly more responsive, and mpg goes up,.. the higher the octane the less gas it takes to make the same power

[nolife]

I haven't used higher than 89 in my stock Mustang for years, If I remember correctly, I got less MPG with 93 octane.

[smashstang]

without tuning on a dyno how much can u advance your timing while being safe while on 93 octane, 100 octane?

[JBIGBOOTSY]

Originally Posted by smashstang without tuning on a dyno how much can u advance your timing while being safe while on 93 octane, 100 octane?

There is a point when advancing too far will lose power too. On a dyno its hard to tell. on a 300hp car about 8-15hp from 10 to 15*

[1slo5.0]

If your engine does not require the higher octane fuel, the fuel will do nothing for you. In fact you will probably lose a few horsepower. On a stock 9:1 compression 5 liter you will never see a benefit from race fuel even when you advance the timing. Race fuel is for high compression or forced induction or heavy nitrous engines. That is where you will see a difference in timing, not on a 9:1 compression naturally aspirated engine.