Thread: 287 sbc inverse flank cam

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Gassersrule 196-----found the cam and rev kit

Crower steel billet
w.o.# r-9574 #00002-b

1.5 rocker specs
intake .734 320/286 050 lobe lift .459
exhaust .690 324/290 050 .460
109 lobe center
intake open 35 tdc close 71 abc
exh open 75 bdc close 35 atdc


resend me your address

Jerry

pm sent.......

I'll let you know when I've shipped it---probably Mon or Tue

Jerry

what is an inverse flank cam thanks ted

it is a cam that has a lobe that opens slower at first then accelerates---so lobe is more pear shaped than egg shaped----really the appearance is that radical, but it was an advanced design that Crower ground for me back in early mid seventies----it was necessary to use a small diameter grinder wheel so was difficult/expensive(not cost effective---required switching wheels, dressing frequently and balancing of the grinder) and never used for shelh/common cam grinds

The numbers I posted are checking numbers but do not really define the cam's charistics

It also stopped some valve bounce on closing but did approach liftr launch at the high opening rate

Jerry

thank you for the info I learned something new today thanks jerry........ted

so that monza witht he 287 was it a stick car or an automatic?

Originally Posted by jerry clayton

it is a cam that has a lobe that opens slower at first then accelerates---so lobe is more pear shaped than egg shaped----really the appearance is that radical, but it was an advanced design that Crower ground for me back in early mid seventies----it was necessary to use a small diameter grinder wheel so was difficult/expensive(not cost effective---required switching wheels, dressing frequently and balancing of the grinder) and never used for shelh/common cam grinds

The numbers I posted are checking numbers but do not really define the cam's charistics

It also stopped some valve bounce on closing but did approach liftr launch at the high opening rate

Jerry

Jerry, did Comp Cams tried something that may have been similar on some very expensive, radical high lift sprint car roller cams back in the late 70's????
The Tech we used at Comp for our cams was "J. R."--can't remember his name for the life of me...... Just curious if there's was the same technology or something entirely different?????? The cams did have a peculiar lobe shape, that much I do remember about them....

Comp called it a "Taravel" grind. Same approach as the Crower design. Expensive custom grinds and a long wait to get.

Gasser--it was Richmond 5 speed--10-11000rpm
Dave---I don't know--I did this early mid seventies----info did get out and around as people switched jobs/companies--probably should of tried to patten the idea

Nitro---yes they were time consuming to made with small grinding wheel--plus different set up/trueing/balancing small grinder wheel--plus all the masters were made for machines with large wheels

still gonna sell that doug nash dave?

Originally Posted by gassersrule_196

still gonna sell that doug nash dave?

Soon as I can afford to replace it with that G-Force 5 speed!!!!

see how this goes around????? maybe we can get some auto industry bail out funding!!!!

QUOTE=jerry clayton;347275]see how this goes around????? maybe we can get some auto industry bail out funding!!!![/QUOTE]

That would be kewl, Jerry!!! 'Spose they would throw in enough so I can afford that 800" aluminum block and the repop Ford Hemi heads????? Heck, they give me some funding for that I'd give Scooter that old Nash!!!!!

Originally Posted by jerry clayton

Gassersrule 196-----found the cam and rev kit

Crower steel billet
w.o.# r-9574 #00002-b

1.5 rocker specs
intake .734 320/286 050 lobe lift .459
exhaust .690 324/290 050 .460
109 lobe center
intake open 35 tdc close 71 abc
exh open 75 bdc close 35 atdc


resend me your address

Jerry

How many years has this Camshaft been Sitting and Why ?