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		Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Passenger and Sports Car Forums > Corolla Forum > Older Generations (1969-1987)
Compression Ratio's

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Older Generations (1969-1987) Specific discussion of the AE86, along with generations 1 through 5.

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08-16-2010, 07:07 PM

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Compression Ratio's

I'm looking at increasing the C/R of my 4A-GE however I'm not looking to upgrade from the stock ECU at the moment. I have a small port bottom end and a big port head. So I was wondering what the highest C/R I can run using the factory ECU. Any help would be greatly appreciated.

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08-21-2010, 07:43 PM	#2 (permalink)
AZNWOKZ Official TN Member Join Date: Sep 2007 Location: CT Posts: 196 Gameroom cash: $18800 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews	Sig wa??? Loss in your logic. what judges the Compression Ratio per cylinder is size dimension of the cylinder, piston head, how good the piston rings are, and the stroke. Your Factory ECU just balance the ratio of Fuel and Air.

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