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Book Clarification...

Posted: 07 May 2018, 20:02
by steveo
Easy one...

On Page 205 of the Good Book, under the "Rocker Arm Mounts" section it says "The pivot is located 16" above the base of the chassis ..".

I am assuming that means 16" above the TOP of the base chassis, i.e. if the chassis is sitting on the table then 17.5" above the plane of the table assuming 1.5" tuning has been used.

Can someone confirm that?

Re: Book Clarification...

Posted: 08 May 2018, 06:22
by Midlana1
Per Figure 20.7, the forward top end of the square 1.5" side rail (tube 107) is 14" above the build table. The aft end of tube 107 is 17.5", see Figure 19.14. The pivot point is roughly a third of the way back, so 1/3 * (17.5 - 14) = 1.2". 14 + 1.2 = 15.2". The actual pivot point is roughly an inch higher, so it's in the ballpark, but still a rough guess. I'll confirm what it is on the car tonight.

Re: Book Clarification...

Posted: 08 May 2018, 16:01
by freakynami
16.0" in my "book" CAD model. Back in the "errata" thread I asked the same question, although I already ran with the 16.0" assumed from the datum, or underside of the chassis; it was the lateral 8.5" that should read 10.3"

Re: Book Clarification...

Posted: 08 May 2018, 18:36
by Midlana1
I confirmed that it's 16" from the build table to the pivot center.