S4 T2 Pre cat, cat, OEM exhaust HKS Ignition amp, 91 oct. 171.9HP 161.2tqs
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Also I just found out my exhaust isn't OEM. There was a car with stock exhaust at the meet this last weekend and mine is not stock. I can't find any markings on it so I have no idea what it is. I'll post a pic.
I need more fuel before I can test the intake and exhaust. I found an Rtek 1.7 for sale at the last meet. Should be picking that up. If that falls through I'll put a SAFC neo on and tune it.
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Apparently my exhaust is an old HKS system not OEM like I thought it was.
https://www.rx7club.com/showthread.p...6#post11091416
https://www.rx7club.com/showthread.p...6#post11091416
#17
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turbo s4's are designed to run on 87 octane ? says who? ive always thought you want to run 91+ octane on anything thats being boosted anything less i thought was bad for the engine, but can be run if you're being cheap, but i thought its not reccomended to boost on it
Turbo models, Mazda recommends regular octane for a completely stock Turbo Fc. it doesnt hurt to go to 91, but some people have reported that it actually feel l little sluggish on 91+, If you have 89octane, you can use that
you dont need to run high octane on anything that is boosted. you run what ever the manufacture recommends, anything more is just a waste of money.
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#23
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Ran 87 in my (s4) turbo 2 for 50,000 miles, half of which were at higher than stock boost levels. If you are on the stock turbo running within the stock turbo efficiency range (12 or less psi) you will be fine on 87 octane.
Running the stock turbo over 12psi is stupid regardless of what fuel you use, and is dangerous on the stock ecu.
Running the stock turbo over 12psi is stupid regardless of what fuel you use, and is dangerous on the stock ecu.
#24
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Ran 87 in my (s4) turbo 2 for 50,000 miles, half of which were at higher than stock boost levels. If you are on the stock turbo running within the stock turbo efficiency range (12 or less psi) you will be fine on 87 octane.
Running the stock turbo over 12psi is stupid regardless of what fuel you use, and is dangerous on the stock ecu.
Running the stock turbo over 12psi is stupid regardless of what fuel you use, and is dangerous on the stock ecu.