Re: 283 feulie rebuild
The LT-1 cam is not "modern", but then "modern" cams don't work better. That's a myth. The inlet lobe is from the BB SHP cam that was designed in 1964. The exhaust lobe is from the 30-30 cam (and phased four degrees earlier), which was designed in 1963.
Idle characteritics are a function of overlap and since the LT-1 and Duntov cams have the same effectice overlap in sq-in-deg, their idle quality is the same.
When I designed my special cam, I followed the same course - the inlet lobe is from one OE cam and the exhaust lobe from another.
The OE lobes have very nice, mild dynamics (except the early base engine cam, which was replaced by the 3896929 in '67) and will support high revs with the modest force OE valve springs.
Duke
The LT-1 cam is not "modern", but then "modern" cams don't work better. That's a myth. The inlet lobe is from the BB SHP cam that was designed in 1964. The exhaust lobe is from the 30-30 cam (and phased four degrees earlier), which was designed in 1963.
Idle characteritics are a function of overlap and since the LT-1 and Duntov cams have the same effectice overlap in sq-in-deg, their idle quality is the same.
When I designed my special cam, I followed the same course - the inlet lobe is from one OE cam and the exhaust lobe from another.
The OE lobes have very nice, mild dynamics (except the early base engine cam, which was replaced by the 3896929 in '67) and will support high revs with the modest force OE valve springs.
Duke
Comment