TR220 and 1.85 rockers

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Oct 29, 2003 | 12:12 PM

ALPINE

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From: College Staion, Texas

TR220 and 1.85 rockers

I'm about to swap to a TR220/555/556/114 and was wondering what changing rockers would do. Any experience with small cams and different rocker sizes? I'm trying to keep it dependable. TIA.

Oct 29, 2003 | 04:31 PM

4thGENRETARD

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From: Further South than Hell

It is thought that 1.85 rockers should not be used with cams over .550 lift. I guess with that one you would be borderline. U could use 1.75 instead of 1.70.

Oct 29, 2003 | 05:03 PM

ALPINE

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From: College Staion, Texas

I've got about a month before I put this thing in, you by any chance know the conversion? Is it just a multiplier?

Oct 29, 2003 | 05:18 PM

SSean

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From: Austin, TX

lets see, the TR220 cam is 553 lift, divided by the stock ratio of 1.7, multiplied by your new ratio (1.8), gives you a lift of ~.585 (someone correct me if im wrong)

Thunder Racing doesnt recomend the use of 1.8 rockers with their cams due to the fast ramp rate of the cam

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