Originally Posted by savage9scorpio
okay I have a 400 sbc stock bottom end. aluminum dual plane intake, 750 qjet, stock heads (for now) and a powerglide w/2.73's AND 488/510 CAM WITH 114 LSA. I haven't got the timing done completely so its still a lil off and I've been advised not 2 go WOT until I do get the timing down. but so far I love the 400's torque compared 2 the putt putt 307 I had.
the motor shifts into second around 40mph. can drop down 2 20mph while its in 2nd.
BUT MY QUESTION IS WITH A WIDE LSA WOULD THE TOP END BE MORE THAN a smaller lsa cam?
A wider LSA
favors top end over bottom end, but the difference won't be huge unless the cam is a mismatch from the get-go. An article that compares various LSA in a SBC 400 (as well as open and divided plenum intakes): http://www.chevyhiperformance.com/te...t/viewall.html
Also, many cams have ground in advance when installed at the recommended ICL. This doesn't change the LSA, but tends to bolster the bottom end.
Wallace Racing - Automotive Calculators
when I'm in it it feels good on the highway I'm cruising @ 72 right around 1900 rpm. this is a STREET CAR. I haven't gotten into the throttle 2 much but what should be top end speed when I do get into those big secondaries?