MOD500

As a willing RL'er acting in the name of research, I will do the following at the next v-max given the comments regards fuel grade and performance in another thread:

Will fill up the near empty tank with BP 102 and head to the Airfield, note Bruntingthorpe is 30 mins from the BP station, so plenty of time for the fuel lines to be filled with the loopiest of juice and the ecu to 'feel' the new fuel. When the tank is less than a 1/4 fun after many runs, will journey to the gas station near the track, and fill with Texaco SUL 97, return to track a do a number of runs. If there is time, will then add 2 bottles of Pro Boost and hit the track again.

For each blend of fuel, will data log runs, plus the laser speed at the end of the 1.6 mile straight. Plus if can avail myself of a Hammer will log the IAT for each blend.

Has anyone got any comments? I appreciate am not draining the tank between fills, etc, but is the best I can do given the time available at the airfield.

Kind Regards




Martyn.

ACEparts_com

I'd happily chip in a tenner towards costs! Nothing else to add.

OldGuy

Whats a Tenner? is that one less than a elevener? Stupid US guys (me)

ScottMellor

About 20 bucks these days

eclou

I would consider running the 97 with octane booster first. I would think you are at higher risk running the higher octane first then dropping the quality than vice versa.

Kevin

I agree with eclou, and forget the octane juice in a can.. Run the 97 straight up! For a fair test, make sure your last fill up was 97. You don't want to dilute the 97 with your 102 and loopy juice. Unless you have a empty or near empty tank..

The grand-daddy of all tests would be to run 8 gallons of your BP102 and 4 gallons of Toulene.. Go to your local paint store) 116 octane Ron/Mon 2 That would be your best "blended" race gas..

Kevin

You can log the IAT, that's not what is impacting the HP.. Run your knock count, and timing and cylinder head temps..

MOD500

I had thought about filling with 102 second, but is an hr + round trip for the 102, which I did not really want to do during the live track time, I could shoot off over lunch I suppose (and miss the fine burgers on offer).

So, will fill with 97 SUL first (the car already has 97 in there btw), then fill with 102 when empty.

Can I log head temp, timing, etc on the Hammer, Kevin?

TB993tt

There is zero "risk" attached to running anything 97RON and over on MOD's car, the ECU can pull timing if need be. Since MOD'S has similar low IATs at vmax to mine courtesy of his Secan I am struggling to see how any loopy juice will make a difference ?

The makers of BP102 say gains are realized when the car is reprogrammed for the 102, presumably more boost and timing to use the extra headroom afforded until knock approaches ?

This test would need to be done on another car which is aready pulling timing at vmax speeds...... Phelix ??

zweistein

Hi,

I note a difference between running 95 Octane fuel and SuperPlus 98 Octane fuel. With 95 the 993TT is less responsive to throttle and sometimes it feels more hesitant. The car is made for the 98 Octane fuel.

Andreas

ACEparts_com

Approx $20 or almost ONE gallon of BP102 (vs. our $9 for a 'super unleaded' gallon!)

Felix

Am watching this thread with interest but I'm not able to make it; sorry.

eclou

If his car is running the same low IAT's over a long sustained run then theoretically 102 should not provide an advantage, but as Kevin said IAT is probably more informative about the matchup between the motor and the turbo sizing than the margin of safety of the combustion chamber. I would think the knock count, EGT and AFR should give better clues as to the condition of the combustion itself in that the sensors (EGT and AFR) are directly downstream of the combustion and can catch a burp or hiccup.

MOD have you thought about simply carrying a 5 gallon jug of 102 in the front boot? It fits at a tilt and that's what I did at the last track venture with the 993tt.