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switching from 987s to 977s....

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Old 09-15-2003, 08:46 PM
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Default switching from 987s to 977s....

I am getting ready to switch from Comp 987s to 977s. Anyone ever done the switch? Whats involved as far as parts and labor?
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Old 09-15-2003, 08:52 PM
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Default Re: switching from 987s to 977s....

What's the open seat pressure on that spring? Double check the O.D. also to make sure you don't need any more machining.
Old 09-15-2003, 08:58 PM
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Default Re: switching from 987s to 977s....

If I remember correctly the 977s maybe .030 bigger.....
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Old 09-16-2003, 03:15 AM
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Default Re: switching from 987s to 977s....

your 987s are not keeping up huh? how high you spinning?
Old 09-16-2003, 05:11 AM
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Default Re: switching from 987s to 977s....

If you have Ti or Steel retainers the same retainers will work from the 987's to the 977's. The installed height of the springs is +.050 higher on the 977's

You should also consider running the 4704 spring seats since there is so much higher pressure with the 977 springs. If you don't have the 875-16 Comp R lifters then this is a good time to get them since the stock ones will colapse up the pressure of those springs.

We can ship you out the 977's and other parts you need. 977's are $111.95 + shipping. If you need any of the other parts such as seats and lifters we also have those.

Bret




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