Driver's Education
Club Racing
Member List
RSS
Help
Darren wrote:
The fuel mix was 2:1 of 93 and E85,(effective octane of 97) and the car seems to like it. Ethanol also has a cooling effect when it's atomized, (think alcohol injection) The tune on the car is very conservative though, it's a street port with the stock intercooler and turbo, and only making a peak of around 8PSI. With that setup it's making 213RWHP. Stock is 210 flywheel HP at 10PSI. The extra octane is mostly me being paranoid and worried about a momentary ECU brainfart causing a lean condition and popping the motor, it would take a loooong time buying expensive gas to cost as much as one detonated engine.
That said it looks like my motor is broken again anyway, with a bad coolant jacket seal. At least that one should be a relatively cheap repair.
As for the bang for the buck on a track car, I've been doing the street/DE thing for a while and it really is a bad compromise. I'm faster with Darren's Integra than I am with my RX-7. The RX-7 is too harsh on the street, but not stiff enough on the track :p The motorcycle-weight flywheel and 6-puck clutch also make it miserable in traffic, and the lack of AC and power steering make it annoying at times as well.
Of course you can learn to drive well on any car, but to achieve the confidence to go really fast you need a car that's well set up.
Quote:fasthonda wrote:Sorry for the thread necromancy, I haven't been on this forum in a while, but I have a couple of things to add to this discussion...Quote:E85 should be extremely detonation resistant too, but at the time, i didn't have big enough injectors nor the right programming knowledge to set it up.Gene uses e85 in his RX7 turbo, I think mixed 50/50 with 93 octane. He was told by his tuner he could do that without changing his air/fuel mapping. I don't know whether that is true because of the ratio or because of his boost level, however.
The fuel mix was 2:1 of 93 and E85,(effective octane of 97) and the car seems to like it. Ethanol also has a cooling effect when it's atomized, (think alcohol injection) The tune on the car is very conservative though, it's a street port with the stock intercooler and turbo, and only making a peak of around 8PSI. With that setup it's making 213RWHP. Stock is 210 flywheel HP at 10PSI. The extra octane is mostly me being paranoid and worried about a momentary ECU brainfart causing a lean condition and popping the motor, it would take a loooong time buying expensive gas to cost as much as one detonated engine.
That said it looks like my motor is broken again anyway, with a bad coolant jacket seal. At least that one should be a relatively cheap repair.
As for the bang for the buck on a track car, I've been doing the street/DE thing for a while and it really is a bad compromise. I'm faster with Darren's Integra than I am with my RX-7. The RX-7 is too harsh on the street, but not stiff enough on the track :p The motorcycle-weight flywheel and 6-puck clutch also make it miserable in traffic, and the lack of AC and power steering make it annoying at times as well.
Of course you can learn to drive well on any car, but to achieve the confidence to go really fast you need a car that's well set up.
#43 PTE Blue Integra