Hey, my 98 talon base model is stock, less a k&n air filter. I still go to the import hangout on the weekends and race those integra GS's and stuff. Anyway, Does running racing fuel help my car ANY? Also, can this cause any long term damage?

Thanks,

Adam

1990 Eclipse GS-T

well race fuel is expensive so unless you want to waste money don't buy it. i'm no chemist but from prior conversations on this board even 93 octane in a stock car is a waste your computer can't take advantage of the higher octane. when you want to battle knock ands detonation thats when you need race gas. so if you go turbo or high power all motor thats when you may need it

I edited to the wiki!

no you dont, racing gas is usualy 110 octane.

high octane gas just prevents detonation. a stock car has nothing to worry about.

if you are running boost or nitrous then it comes into play and it helps

I love dino and 2gnt. ####ers (my word) bliz stole it but i let him borrow it

Higher octane prevents detonation, true. This also means that the explosion cause by your spark plug is slowed down over the area of the combustion chamber. This means your piston is already headed back down when the explosion hits it. Similar to bad ignition timing. this is not good, it hurts your power and you engine. I have seen pistons will damage similar to predetonation, That was caused by running too high of an octane gas. You should only run 87 or 89.

Lane Adams

1998 GST Spyder
1995 GSX
1995 TSI AWD

the manual states you must not go lower than 87 but it does not say its bad to use higher octane gasoline. the spark is "sped up" or "slowed down" depending on engine load but isnt it a bit strong to say that higher octane gas will harm your engine? we have some pretty good engines ya know! lower octane will detonate much more than higher gas and that wil also harm your engine. hell i used 93 octane in my YUGO and i never had any problems.. (ok.. yall go easy on me with the yugo jokes. )

I don't know about harming your engine. It could be possible I guess.

But...theoretically you will lose power going with higher octane when your timing is not set to need a slower burn. How much power? Probably not enough to notice, but I don't know that for sure either.

matt

99GS MT | Star Stage 2 | GC coilovers | HurriganeGS tie bars | Tokico Illuminas | 17x7 Enkei RS5 | Baer track brakes |+

our cars are tuned for 87 octane. no one has studied or done tests with different octane to see the ECU's reaction, and how/if it compensates for the change..

umm, and ya detonation for turbo/naws application

03 srt-4 13.130@112.47mph (n2o, stock turbo, 10/2003)
now: 20g, portfueler, bpu+++ (track/dyno times tbd...)

i farted on your wiki

Well,
I'm just telling you guys what I have had experience with. The damage too-high of octane gas causes is over a long period of time, I think the guy ran his engine with 100 octane sonoco every weekend for about three months. He started experiencing alot of blow-by and after a test , he had no compression in his no.7 cylinder we pulled the head off and the was a dime-sized hole in the top of his piston (very similar to damage I have seen by using too low of octane(predetonation)) wow, parnthesis inside parenthesis I bet you never saw that in english class! I have also seen a late-model cavalier that tried to run high octane, but the PCM adjusted the timing so much to compensate that the car would barely run. bottom line- IF YOU DO NOT HAVE PREDETONATION PROBLEMS WITH 87 OCTANE YOU DO NOT NEED HIGHER OCTANE FUEL. IF YOU NEED TO GO TO 93 TO ELIMINATE KNOCKING DO IT, BUT GOING TO 100 IS NOT GOING TO GIVE YOU BETTER PERFORMANCE. higher octane is for engines with higher compression ratios. how about that for a rant

If I am wrong prove me wrong, You learn something every day!

Lane Adams

1998 GST Spyder
1995 GSX
1995 TSI AWD

Wow, I had no idea. I wasn't sure if it helped performance or anything. I guess I'll enjoy the mid grade fuel right now until I go turbo. Thanks a million you guys.

Adam

1990 Eclipse GS-T

Unless you are running nitrous, higher compression, or turbo, then you don't need anything more than an 89 octane. In terms of performance, it's not going to give you anymore horsepower. In terms of detonation prevention, it could help minimize the chance of detonating, but you probably won't have that problem if you are, basically, stock. Higher octane burns more easily, thus giving you better combustion; but if you don't have more air--either by way of a turbo or nitrous--it's not really going to benefit you that much, except emptying your pocket. Save your money. Race gas is just that--race gas. It isn't meant for daily driving. Since it contains lead, long term use isn't good for fuel injection engines.

___________
Kon C

"Sometimes, a man has to do what a man has to do."