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Author Topic: Question - Eagle or Scat 3.98 crank, either easier to internally balance?  (Read 11061 times)

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Barry_R

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Re: Question - Eagle or Scat 3.98 crank, either easier to internally balance?
« Reply #15 on: June 20, 2012, 06:37:02 AM »
Just getting back from a family vacation...

No info on the Eagle.  But we've done a few of the Scat ones.  They usually balance internal pretty easy - but often still need weight in the rear.  Less than when using a factory crank.  Very much determined by the piston & rod selection.  The lighter you go the less metal we're adding & we can just drill/grind.  With tungsten costing around $60-75 per slug installed this sometimes pays for a piston upgrade...
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My427stang

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Re: Question - Eagle or Scat 3.98 crank, either easier to internally balance?
« Reply #16 on: June 23, 2012, 02:30:50 PM »
Barry, looks like a max bobweight of 2100 grams, but I could pull more out of them if I wanted, all the parts have plenty of pad left. 

That's lighter than my 489, but do you consider it light or heavy for an internally balanced 3.98?
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Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch
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