Bad Gas Mileage??
07-06-01, 11:47 AM
#31
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IS300.net archive
Allright, got something off IS300.net archive that may explain the rich fuel setup that is being adjusted by the override:
Originally posted by God:
Actually all cars are tuned rich, not just Toyotas. Just a safety margin built in from the factory to avoid warranty claims. Running a little rich doesn't harm anything and helps keep the combustion chamber cool which is more 87 octane friendly.
As far as the V-AFC, you can use it on any VVTL-i motor but unlike the new Celica, the IS does not have a high lift cam profile, it only adjusts the cam timing is all and is constantly variable. V-AFC won't do anything more than an S-AFC. You CAN go for the S-AFC to take out some fuel. We see a good 6-7 whp on Hondas from leaning out the fuel curve usually. With a higher output motor like the 2JZ, more power is probably ottainable. Just to give you an example of how rich cars are, I have NEVER seen a car with bolt ons that benefitted form increasing fuel.
Actually all cars are tuned rich, not just Toyotas. Just a safety margin built in from the factory to avoid warranty claims. Running a little rich doesn't harm anything and helps keep the combustion chamber cool which is more 87 octane friendly.
As far as the V-AFC, you can use it on any VVTL-i motor but unlike the new Celica, the IS does not have a high lift cam profile, it only adjusts the cam timing is all and is constantly variable. V-AFC won't do anything more than an S-AFC. You CAN go for the S-AFC to take out some fuel. We see a good 6-7 whp on Hondas from leaning out the fuel curve usually. With a higher output motor like the 2JZ, more power is probably ottainable. Just to give you an example of how rich cars are, I have NEVER seen a car with bolt ons that benefitted form increasing fuel.
07-06-01, 12:47 PM
#32
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Cough it up Rubley
Well rubley can you tell us (or me at least) what an intake does that increases the HP of a car? I was one of those kids who constantly asked WHY? and HOW? when I was a kid and now I'm starting again since I got my IS.
07-06-01, 10:01 PM
#33
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Re: Cough it up Rubley
Originally posted by Mike D
Well rubley can you tell us (or me at least) what an intake does that increases the HP of a car? I was one of those kids who constantly asked WHY? and HOW? when I was a kid and now I'm starting again since I got my IS.
Well rubley can you tell us (or me at least) what an intake does that increases the HP of a car? I was one of those kids who constantly asked WHY? and HOW? when I was a kid and now I'm starting again since I got my IS.
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