[Vince1219]

GM guys, usually when I run e85 it's 2 gallons and half a tank 93.... Some times I get 17.5psi but if my fuel pumps are factory, how much e85 can I safely run.

[csu87]

usually up to an e30-e40 mix.

[Vince1219]

Originally Posted by csu87

usually up to an e30-e40 mix.

Can you explain how much that is please? Sorry

[JDuke335i]

Originally Posted by Vince1219

Can you explain how much that is please? Sorry

This will be if your car is dead on empty

[csu87]

bookmark this.

http://www.intercepteft.com/calc.html

[Jeff@TopGearSolutions]

Start with 30% E85. Keep in mind your current fuel source may already have 10% Ethanol.

[Vince1219]

Originally Posted by Jeff@TopGearSolutions

Start with 30% E85. Keep in mind your current fuel source may already have 10% Ethanol.

Correct?

[Jeff@TopGearSolutions]

Originally Posted by Vince1219

Correct?

More or less. It doesnt need to be a 100% accurate. That's why I say aim for E30 cause once you tip past E40 you may be pushing the limits.

[stanlalee]

Approx 4 gallons of E85 with the rest (12 Gallons) pump gas (E10) will give you E30. 6 gallons of E85 will give you E40. If your gas is straight petrol (no ethanol) you will fill with 6 gallons of ethanol and 10 gallons of straight petrol for E30 and a 50/50% mix for E40 (8 gallons E85 + 8 gallons of Petrol). These are based on E85 figures. Your E85 pump may be anywhere from E70-E90.

[Vince1219]

Originally Posted by stanlalee

Approx 4 gallons of E85 with the rest (12 Gallons) pump gas (E10) will give you E30. 6 gallons of E85 will give you E40. If your gas is straight petrol (no ethanol) you will fill with 6 gallons of ethanol and 10 gallons of straight petrol for E30 and a 50/50% mix for E40 (8 gallons E85 + 8 gallons of Petrol). These are based on E85 figures. Your E85 pump may be anywhere from E70-E90.

The 93 down here in Florida contains ethanol, so I'll go with your first suggestion, 4/12... Thanks you all

[:ninja:]

This mixture can be greatly off of the e85 your using has poor quality.. I say test before u mix..

Example your mix calculators is based off of 85% ethanol content where as some places can have 78% when tested if that makes sense

Originally Posted by :ninja:

This mixture can be greatly off of the e85 your using has poor quality.. I say test before u mix..

Example your mix calculators is based off of 85% ethanol content where as some places can have 78% when tested if that makes sense

Agreed.

OP: what tuning solution are you using?

[335NJ]

Log often, review the logs, and that will determine how much E85 you can run on the stock LPFP. My car ran best on E35-40, some can't run more than E20-25, some can run E45.

[mike@x-ph.com]

Originally Posted by 335NJ

Log often, review the logs, and that will determine how much E85 you can run on the stock LPFP. My car ran best on E35-40, some can't run more than E20-25, some can run E45.

+1 make sure to log often and double check that your fuel pumps are good.

[musc]

Originally Posted by 335NJ

Log often, review the logs, and that will determine how much E85 you can run on the stock LPFP. My car ran best on E35-40, some can't run more than E20-25, some can run E45.

+2

Can't stress this enough. Log! My friends LPFP died with E25 (105k on car/pump). Every pump is different. Start low, log, and increase accordingly.