Hey I'm doing an ls vtec with an itr head, gsr cams, and p30 pistons. The head is stock besides the cams and the block has shotpeened rods, arp rod bolts, vtec water and oil pumps, and vtec timing belt. I need to know the estimated compression because I need this to run on 93 octane. Thank you!

 

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What is it with vtec oil pumps, I thought all obd2 oil pumps are the same are they not, I know for water pump there is a 22 teeth and a 19 teeth count