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#1
03-30-2006, 12:08 AM
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197 HO head question
Does anyone know what the stock flow rate is for an unaltered 197 head? Also will they accept 1.65 rockers without the modification? (grinding of the pushrod hole)
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#2
03-30-2006, 12:13 AM
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Stock flow for a 197 should be in the 225-230 cfm range at 28" at .500-.550" lift.
We've had 1.6 ratio rocker arms on our HO heads without pushrod bind, but 1.65 may be neglegible. It seems that each head is different. Some accept higher ratio rockers without binding and others don't. |
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#3
03-30-2006, 12:14 AM
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Quote:
You must grind for pushrod clearance when using 1.65 rockers on the #197 HO heads. I run a set of those heads myself with 1.65s on them and they needed to clearanced.
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#4
03-30-2006, 11:53 PM
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Thanks for the reply guys!
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