well i've seen enough....i just skimmed this thread but i already know im on the way to the store to get some acetone and seasalt. and im grabbin some blue ink for my wiperfluid holder, i heard it added 5 HP.

 

Myth Busters did this one... No improvement to mileage. "Busted"

 

Don't forget some NOS stickers, those have to be worth at least 10HP right? [sm=happybounce.gif]

 

There is an additive (1,4 dioxane)
available at most motorcycle shops
that will improve HP
by leaning out the air to fuel ratio
closer to the 'optimum 12.7' at wide open throttle.
It is very commonly used by 'cheaters' in racing.
See old post below:
====
from

http://www.thatsracin.com/mld/thatsracin/10609834.htm

Rumors and conspiracy theories ran wild, especially on the Internet, a haven
for so much paranoid innuendo it makes Kennedy assassination conspiracy buffs
seem well grounded and in the know. Some suggested that NASCAR was delaying
acting on Mayfield's illegal fuel until after the running of the NAPA Auto
Parts 500 at California Speedway on April 30.

The conspiracy theorists detailed a compelling argument: California Speedway
was built by Roger Penske, co-owner of Mayfield's car. In mid-1999, Penske
sold his raceway empire for $740 million to International Speedway
Corporation, which is majority-owned by NASCAR President Bill France and his
family. After the deal closed, Penske was named vice chairman of ISC.

When the Mayfield brouhaha came up, France didn't want to embarrass Penske,
the conspiracy theorists argued, so NASCAR waited until after the race to rule
on the fuel, an assertion Helton would strongly refute later on.

About the alleged fuel additive NASCAR detected at Talladega, Mayfield was
defiant in victory at California. "Didn't use nothing, didn't need nothing,"
he said.

But the truth was a bit more complicated.

Finally, on May 2, Helton spelled out NASCAR's findings and the subsequent
penalties.

NASCAR discovered an illegal over-the-counter fuel additive had been slipped
into Mayfield's fuel by one of his Penske-Kranefuss Racing crewmen, who NASCAR
insisted acted alone and without the knowledge of anyone else on the team.

The additive was what's known as an oxygenate, designed to increase the oxygen
content of gasoline and therefore increase horsepower. "It's called
1,4-dioxane," Helton said. "It is something that's available fairly readily in
high-performance shops and motorcycle shops in particular. It's something you
can go buy off the shelf."

There are three cardinal sins in NASCAR: tampering with fuel, tires, or engine
size. And Mayfield's team got caught violating one of them. "It's a very
sacred area," Helton said. "Anything that works against us in that area we're
very sensitive to."
-------
from

http://www.damonlusk.com/article.asp?artnum=630

It's even stranger that the team tested with an illegal substance -- a
substance that can be bought on a store shelf -- and after testing it on the
track, Kranefuss admits that the additive had no impact.

"There was no impact at all," Kranefuss said, "but, I can tell you that if you
want to make this particular deal impact, you would have to mix it 50-50. We
didn't have enough to do
that."

So if there was no effect, why keep the oxygenate around? Why use it in the
first place?

"We had an engine that was a little down on power and we wanted to see if we
came back to that race track with the right power what the impact would be
with respect to the chassis set up. It's a very quick way to do it, and,
obviously, they were sort of curious -- is this stuff working?"

According to sources close to the team, they all knew it was working and the
dynamometer proved that the additive increased the horsepower of the engine by
11 horse power with the open motor and 22 hp on the restricted motor.