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Stang-R: ei midagi uut siin ilmas:
http://www.tqhq.ee/forum/viewtopic.php?tid=24215&spid=216823#216823

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vasja: To Tank1 - Aga mida tuleb ümber seada?

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Fog:
Hi Michael,

Care to enlighten us on using E85 on these relatively "old" engines. I have a 3800 S1 turbo build halfway done, and was wondering about that.
Statoil brought E85 to the consumer market here last year...

One could use input from flexifuel sensor to drive additional injector(1000cc or so) using standard injector pulse for timing and ff sensor output converted to pulse width?
Then the ecu will not go lean by the numbers (lambda VS maf gpm.).

Feasible?
What about timing?

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Michael Vallinder:
It's no problem to run on Ethanol in terms of getting the right amount of fuel.

You could just size up the injectors with 30% or increasing the fuel pressure with (square out of 2 )*30)% (or something similar, I don't remember the formula in detail).

The problem with running ethanol is far worse than one would think.

There are a few problems that would need to be adressed:

* Replace fuel filter and fuel pump to devices that can handle ethanol, Fuel filters are often glued together and the ethanol will destroy the glue.
* Replace injectors to ones that can handle ethanol, the metal needs to be of a much higher grade or else it will be destroyed
* Replace some rubber hoses to ones that can handle ethanol
* Increase the ignition energy, after market ignition system with large coils or picking ignition coils from a SAAB engine.
* Use different sprak plugs to ones without fancy metals, normal copper NGKs are by far the best

And now for the difficult modifications

* New piston rings and oil scavenge rings so that they handle ethanol.
* New valve seats and a different alloy in the cylinder head otherwise the valve seats will be destroyed of the ethanol and the cylinder head will corrode behind the valve seats, making the valve seats pop out after a while
* More cooling to the pistons, oil squirt below the pistons for example and also more cooling in the cylinder head, the ethanol makes the combustion chambers very clean and this increases the heat transfer to the cooling water and puts a lot more thermal stress to the cylinder head.

In terms of knock tollerance ethanol doesn't knock and it's therefore very difficult to tune a turbo engine running on ethanol, it's very easy for a hobbyist to advance the ignition to much and therefore generate alot of cylinder pressure. Above 200 Bars is easy to get to, which of course will crack almost any cylinder head there is.


Bottom line:

Buy a SAAB 9-5 BioPower engine and put it in the fiero if you need to use ethanol, otherwise you will just run into ALOT of problems.
You could also convert to GM EcoTec (L850) a later year BioPower Ecotec engine from a SAAB 9-3.

Now you think I try to promote SAAB but the reality is that SAAB is the only manufacturer with high perfoming ethanol engines at the moment.

Perhaps there are some V6/V8s in fairly new american cars that are ethanol capable but that's nothing I have direct knowledge of.

I´m sorry for the negative reply but the thing with ethanol is that it seems to be easier than it is, there are a lot of problems related to ethanol.

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