racerone

I have read in many publications coincidental with the release of the GT3 the fuel tank's capacity is anything from 16.9 gallons (USA DOT STD), to 18.4 gallons (from whatever source), to finally as much as 23+ gallons. Obviously all GT3's here have the capacity at the mandated 16.9 gallons. The question which begs an answer is: What is the true maximum volume of the fuel tank installed on GT3s? If, and this is a speculatitive conclusion only, the build capacity is indeed greater than 16.9 gallons by what means has the capacity been reduced-----and can possible unused capacity be restored? Second item: Though the GT3 engine will run effectively enough on 91 octance pump gas I would hazard a guess the driveability would be improved and performance increased (marginally) if the octane could be brought to say 95 or 96 ROM. Now comes the conundrum, how does one get there from 91? As mentioned in previous forums the store additives are for naught. True toluene or xylene will raise the octane, but wouldn't they cook-off the sensors (to say nothing of their total illegality)? Anyone having any success on this front?

Gentlemen, Thank you all for your considered responces to my posting. I had the opportunity to speak with someone at PMNA who opined the source was probably the limited slip, adding further it should diminish with a bit more time and mileage. To reply to JimB's posting: The push is on a flat 40mph right-hander under no more than 75% throttle in second gear. When backing off the GT3 comes right back.....nevertheless, this would be spooky with something hard on the leftside or in the wet. All cats have claws (most anyway!), you have to learn more of their nature. I plead "no contest" at this time as this is the first Porsche I've owned since 1975 (911E-1971). In my opinion JimB has it sussed, as the rear squats and the weight transfers to the rear the car simply pushes without taking some step(s) to mitigate this act of vehicle dynamics-----as there is provision for adjustment, balance can be restored. The place to find this is, of course, in a controlled enviroment (IE: racetrack).

I purchased a 2004 GT3 in late October. FANTASTIC car! I installed one of Europipe's excellent exhaust system as well as a BMC filter recently-----for those interested, I consider the pair as very worthwhile additions more than meeting expectations. Perfection is in the eyes of the beholder. As near to the latter as this car is I wish I could change the bottom ratio to one approximately 10-15% taller. The yen is the car's ability to poodle about at walking speed, the yang is unless one has grown to have the shifting reflex of a Roy Jones counterpunch say hello to the rev limiter. With the variable cam timing the motor is easily capable of launching with a slightly taller first gear. My questions: a. How difficult to change first's ratio; b. Is this beaucoup in parts and labor; and c. Am I alone in this impression? When driving on city streets at essentially legal speed it seems every time time I have approached a certain flat ingress ramp to a parkway, as soon as modest power is applied the car simply has a mind of its own about pushing hard to the outer lane. My suspicion is this is part of the limited slip rearing its race-bred pedigree at a less than opportune moment. nevertheless, this is SOME push! My query is: a. Perhaps the slippage has not been fully broken in as the car has but 1400 miles; b. The car is so rigid and the rear tires so well planted, especially under modest power, this characteristic falls under the nature of the design; and c. Of course, anyone else notice this?