Quote:
Originally Posted by ksa8907
Id like to revive this thread. I've had octane knock with moderate throttle and revs anywhere over 3000 rpm for the last 6 years. Finally realized it was octane knock after a hot day with my new grill block, It sounded horrid. To remedy the situation I'm going to test e20 to e30 blends.
Currently have 1 gallon of e85 mixed with 16 gallons of 87 octane for e14.5 and 88octane. After 250 miles I do notice the car has more power below 3000 rpm, but when the car gets hot I still get knock and i lose all the power i gained. Ill be refilling in the next few days and mixing to e25 and about 90.5 octane.
All fuel here is e10.
3.2 v6 24valve sohc, 9.5:1 compression.
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What octane does your owners manual call for? It sounds like you have another issue that needs to be addressed that is causing the knocking. The compression ratio you list and engine size doesn't seem like something that would require high octane. Shouldn't warmer intake temperatures decrease knocking due to lower density, or do the warmer temps play a larger factor?