octane rating for 951

[shavinseconds]

what kind of fuel do you guys use or should use for 951? i just got the car and have it filled with unleaded 93 octane at exxon (new jersey).

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[IAPorscheDoc]

Anything 91 or up.

[GrantM951]

I have Weltmeister chips and must use premium.

[nize]

i normally use 92octane, but i'm in the process of preparing to run e85.

[QTC]

the octane rating higher is the best.

to nize
Beware check all your fuel hose and fuel pump: e85 is really corrosive

[nize]

Originally Posted by QTC

to nize
Beware check all your fuel hose and fuel pump: e85 is really corrosive

i think this is an urban legend. gasoline is just as corrosive as alcohol, if not even more corrosive.

if 100% alcohol were that corrosive, they would not be sold in flimsy plastic bottles at the drug store for rubbing use.

[QTC]

It's true, but many fuel pump and fuel hose, are destroy with E85
I don't it's because the alcohol is corrosive, but the mix is corrosive, I think the chemical product to have a stabilized the combustion, they are corrosive.

I saw a test with diesel :

Normal diesel => no problem
Diesel + (with some additive to increase the combustion "Total excellium" => the part in rubber in the fuel pump will be attack by fuel.

So beware, E85 is no only alcohol + gas

[nize]

where is this test you saw? got any links with conclusive data?

[QTC]

It's in France, realized by Renault (car constructor) it was to compare two fuel pump (one of Bosch, and the other was build by an US manufacturer but I don't remember the name)

Sorry I don't have the link, but each Renault garage know this

[nize]

well, diesel is different from gasoline, and 'some additive' can be anything (not alcohol) so i doubt that test applies to e85 fuel.

besides, there are already many 951 cars running e85 for a few years without problems on an all-stock fuel system.

[QTC]

You know you talk about a 951 It's a really good conception car, but all cars aren't in the same case.

When you say "additive can be anything (not alcohol) " it's true but don't forget E85 isn't 85% alcohol + 15% gas, they are many other additive be upgrade the octane rating,

So during my studies I saw the cyclohexane will be a fuel additive and is really corrosive, (not immediately but this liquid create small hole one the fuel hose.

For the fuel pump, there are two category

- Full metal pump
- with polymer membrane

The second one is really fragile

So if the 951 run perfectly with E85, there is no problem to use it

[supedgte]

93 oct should be fine

[spooled951]

93 plus octane boost