i have a 97 prelude, "slightly modded". would i receive any benefit from running 100 octane fuel would it improve my overall performance. what exactely does it do to make you run better. is there any precaution that i should take before running this. any positive feedback would be greatly appreciated.

 

well that wasnt positive...

here comes one of those "tides" talked about in the has any one noticed thread.

 

ok I forgot

no 100 octane will not benefit your mostly stock lude

If you were to put 100 octane fuel in your car, you would be wasting money.

If you built the engine a bit and raised the compression ratio you might need a higher octane fuel.

 

I love wikipedia....

"The octane rating is a measure of the autoignition resistance of gasoline (petrol) and other fuels used in spark-ignition internal combustion engines. It's a measure of anti-detonation of a gasoline or fuel."

"It might seem odd that fuels with higher octane ratings burn less easily, yet are popularly thought of as more powerful. The misunderstanding is caused by confusing the ability of the fuel to resist compression detonation (pre-ignition = engine knock) as opposed to the ability of the fuel to burn (combustion). However, premium grades of petrol often contain more energy per litre due to the composition of the fuel as well as increased octane."

So basically higher octanes in low compression engines do you no good. Unless your 12:1 NA or lots-o-boost, without a taking away some ignition timing, higher octanes wont do much for ya.

 

If you were heavily modded then maybe having 100 octane could allow you to run more ignition timing, but slightly moded no.

if you runing above 13:1 compression then yes start using racing fuel

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4WSi_guy &raquo;</TD></TR><TR><TD CLASS="quote">without a taking away some ignition timing, higher octanes wont do much for ya.
</TD></TR></TABLE>

higher octane allows you to add more timing, not take it away....

 

after reading it, I worded it weird...I meant if your are boosted and dont want to take away timing so it wont detonate...

 

thank you. appreciate the info guys

 

Look into E85

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">higher octane allows you to add more timing, not take it away....</TD></TR></TABLE>

well, yes and no. i dont think optimal timing (best power) is going to change just because you add a chemical to the fuel that is going to change its burn rate. Just because you can add timing, doesnt mean its going to make more power. Dealing with a stock motor, yes, in most cases, you raise the timing and you can get more power.

High octane fuel really only needs to be used with motors with high compression or with turbo motors pushing large amounts of power.

 

but race gas smells soo good

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">ok I forgot</TD></TR></TABLE>

lol i wasnt directing my "tides" comment towards you. was at OP