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texanidiot25 · 04-26-2010, 02:18 AM

On the drive bringing the CRX back, it had some drivability issues. Mainly the lack of power from the fact that the motor could not take any high load (IE, any heavy throttle or hills) with out taxing the motor. Any hard throttle caused it to miss fire, but putting around at low (and I mean low) throttle it was fine, and even revved ok.

This was before I knew it was an HF, and before I knew the HF was a 10:1 compression motor..

Now, typically 10:1 must be ran with premium, but surely there's a way for it to run on regular? And would this account for some of the issues above? I've been thinking 2ndary barrel of carb, but if it was running too low of an octane... may have been my issue.

Surely I could just back off timing and run regular?

04-26-2010, 02:18 AM	#1 (permalink)
texanidiot25 Master EcoModder Join Date: Jul 2008 Location: Cypress, TX Posts: 331 Formula - '96 Firebird Formula/Trans-Am 90 day: 19.31 mpg (US) Thanks: 8 Thanked 31 Times in 18 Posts	What octane to use in '87 CRX HF? On the drive bringing the CRX back, it had some drivability issues. Mainly the lack of power from the fact that the motor could not take any high load (IE, any heavy throttle or hills) with out taxing the motor. Any hard throttle caused it to miss fire, but putting around at low (and I mean low) throttle it was fine, and even revved ok. This was before I knew it was an HF, and before I knew the HF was a 10:1 compression motor.. Now, typically 10:1 must be ran with premium, but surely there's a way for it to run on regular? And would this account for some of the issues above? I've been thinking 2ndary barrel of carb, but if it was running too low of an octane... may have been my issue. Surely I could just back off timing and run regular? __________________ Lets see how far it can go "All I know about music is that not many people ever really hear it. [...] But the man who creates the music is hearing something else, is dealing with the roar rising from the void and imposing order on it as it hits the air. What is evoked in him, then, is of another order, more terrible because it has no words, and triumphant, too, for the same reason. And his triumph, when he triumphs, is ours." -Sonny's Blues