Quote:
Originally Posted by Gaz64
I am glad others feel the same way,  .
Gary |
Yes, throwing a big port Dart head on a small inch engine and then widening the LSA creates scavenging issues. A small engine needs a tighter LSA to help with a large intake port volume.
The Dart heads, even with a 180cc port volume, are still 30cc's larger than a factory head, which is a huge difference.
Major camshaft mismatch on that engine. A camshaft with mid 250's .050" duration and a 260cfm cylinder head should be peaking at around 8000 rpm on a 289ci displacement.