Gull Force Pro now available!

[Ryan]

http://www.gull.co.nz/fuel-products/gull-force-pro/

Gull is proud to launch Gull Force Pro, the latest in a line of improvements Gull brings to the New Zealand fuel industry. Gull Force Pro brings you

• Extreme Octane (>110 RON Octane!)

• Extreme Power & Torque

• Extreme benefits for you and the environment

Gull Force Pro is a specialty high performance fuel made from a blend of 85% bioethanol and 15% premium petrol i.e., an E85 fuel. Gull Force Pro is designed for use in Flexible Fuel (FlexFuel) vehicles which are able to run on any blend from E10 to E85, as well as normal petrol should the need arise. Holden has launched FlexFuel capable vehicles in the New Zealand market in 2010. It can also be used in specifically designed high performance motor racing engines, i.e., motor sports and rally cars.

Gull Force Pro is NOT suitable for standard vehicle engines or fuel systems and may cause serious damage. Consult with your vehicle's manufacturer before use.

[Ryan]

Only available in Melville, Hamilton at the moment.

[ILLEGAL]

Gull Force Pro is NOT suitable for standard vehicle engines or fuel systems and may cause serious damage. Consult with your vehicle's manufacturer before use.


would this only be because the ecu will need to be tuned? or will it cause something more terminal in "damage"?

[Gly]

tune + larger injectors

It requires about 40% additional fuel because ethanol has a lower amount of energy per litre than petrol. Yes this will mean you will get less km's per tank, but you also have greater potential to make power.

The release of Gull Force Pro was in conjunction with the V8 Supercars, and the new Flex Fuel sensor equipped Holden Commodore.
With the flex fuel sensor you can run any combination of petrol or Gull Force pro (E85) and the ECU will automatically compensate.

With Gull Force Pro it's very easy to tune to MBT (Maximum brake torque) without encountering Detonation.

[ILLEGAL]

:) sounds just right for me.. im currently trimming my fuel by 30-40% sounds like i could run more fuel and advance the timing.

what would the A/F ratio required be with that fuel?

[Gly]

http://www.innovatemotorsports.com/resources/news6.php

Tuning Tip: Ethanol Content

We've had a few reports where users could not “nail down” their tune on the street with the LM-1. The AFR's would jump about 0.5 AFR across the WOT band even in the same weather conditions in the space of a few days. Instead of holding a tune, the engine seemed to slowly “yodel.”

Naturally the first thing to blame was the LM-1. But it turned out that the users filled up at different gas stations, sometimes filling up on gas that had 10% ethanol mixed in. As expected, when Schnapps is mixed with cars, things get a little complicated.

If ethanol (stoich AFR of 9) is mixed with gasoline (stoich AFR of 14.7) the resulting gas has a lower stoich AFR than 'pure' gasoline. As the fuel injection is tuned to mix a certain amount of fuel for a given amount of air, the resulting mixture would be leaner when using a fuel with lower stoich AFR.

This can be calculated:

sAFR = (%ofAdditive * sAFRadditive + (90-%ofAdditive) * sAFRgas) /100

where:
sAFR is resulting stoich AFR
%ofAdditive is amount in % of mass of additive (ethanol) mixed in
sAFRadditive is stoich AFR of additive (9 for ethanol)
sAFRgas is stoich AFR of base gasoline (14.7)

For a 10% mixture of ethanol to gasoline by mass the resulting stoich AFR is 14.13

So, for an engine that's tuned to certain AFR at a certain load and RPM on straight gas, the resulting (gasoline equivalent) AFR when running the mixture can be calculated as:

new AFR = tuned gas AFR * (gasoline stoich ratio) / blend stoich ratio

An engine tuned to 12.5 gas AFR will run at the equivalent of 13 gas AFR with a 10% ethanol blend. This is what these people were seeing.

Of course, when running in closed loop, the engine will run at 14.13 AFR instead of 14.7. O2 sensors (incl. widebands) don’t measure AFR, but Lambda. Lambda is defined as actual AFR/stoich AFR. It's a ratio. In closed loop part throttle the engine is just running at Lambda 1.0, regardless of fuel. The same would be true for other Lambda values when running closed loop at WOT using a wideband. The engine would run at the tuned Lambda and everything would be fine. Open loop systems would need to be retuned for alcohol blends though.

Until next time... Keep On Tuning!

-Innovate Motorsports