|06-12-2014 10:54 AM|
Your solid lift cam has similar specs as my Crower mech. roller for my 454. Intake : Duration: 296 Lift: .641, Exhaust: Duration: 302 Lift: .636 Advertised. Duration @ .050: Intake 256 & exhaust: 266, Lobe Lift: Intake: .377 exhaust: .374 Intake opens: 25.0 BTDC Closes: 51.0 ABDC, Exhaust opens: 64.0 BBDC Closes: 22.0 ATDC Lobe Seperation 107* ICL 103*. I have a 496 rotating assembly now and still using this camshaft. I haven't drove it yet but it sure sounds good. It has good crisp throttle response. As soon as I finish installing a new lock set and see if I have clearance for my air breather I going to take it to the muffler shop. Keep us informed on your build.
|06-09-2014 12:20 PM|
439 .560 lift solid lift
I'm running a solid .560 lift intake at a 110 lobe and 540 exhaust at 108 steel 990 heads on a 427 60 over. cam was custom ground at schneiders. 10.25 to 1 compression...it likes the gearing I have. 3.28 first gear with a 3.50 rear = 11.48, stick car. it's a little hesitant on big hills though, once it gets over the 2000 rpm range ... the 427 revs really nice and it surely does not hesitate to rev passed 6500 either. hp...idk...but I wanted it to rev up quick and it does compared to the gen 5 crate 454 I had before. the crate 454 was a nice motor. 8.75 to 1 comp...510 lift. but it cammed out at 5200, and reved up a little to slow for the tall gearing. nothing against 454's, they are some torque sons...but the clean rpms of the 427 I just like a lot more. plus the doug nash is only rated at 450 ft lbs...the 454 would pound the trans into submission. a little less low end torque but the 427 pegs up way quicker.
|10-03-2012 06:29 PM|
|377tk||ultradyne said the cam has a 107 lobe seperation and a 103 intake centerline. Probably will install straight up if it checks out good|
|09-26-2012 09:22 AM|
|1971BB427||Sounds pretty tight on piston to valve clearance! That's a big cam!|
|09-25-2012 11:31 PM|
|vinniekq2||6 degrees will take away 700 rpm on the top.|
|09-25-2012 11:06 PM|
|377tk||planning to run no more than 6 degrees maybe less|
|09-25-2012 11:05 PM|
|377tk||Waiting for ultradyne to send a cam card|
|09-25-2012 10:47 PM|
|vinniekq2||what would the intake centre line be if you put it in straight up?or,how many degrees are you planning to advance the camshaft?|
|09-25-2012 10:43 PM|
|377tk||plan on installing it on a 102 intake center if piston/valve clearance will allow|
|09-25-2012 09:47 PM|
|vinniekq2||thats a fairly big cam. same as what I use in my 434 small block,except my lda is 108 and icl.My engine peaks at 6500,yours will be higher|
|09-25-2012 09:26 PM|
|377tk||I purchased a solid flat tappet ultradyne cam this week, it is a 288/298 255/265 615/630 lift ground on a 112. According to the specs on this cam I think it should work well with my set up. May need to change intake and carb set up or single plane and larger carb.|
|09-21-2012 05:11 AM|
fyi, overlap doesn't reduce compression ratio or reduce cylinder pressure. The engine isn't trying to make pressure at that point in the combustion cycle.
What lowers cylinder pressure is the intake closing point. The later the intake closes the lower the pressure will be.
Use a dynamic compression calculator and it will ask you for the intake closing point. As after the intake closes is when the engine starts to make pressure.
|09-20-2012 10:57 PM|
Pick an RPM range you want to operate.If a cam is only slightly different,the engine will only behave slightly different.You said you want to go mid 11s,,,either cam will do that if the car is reasonable weight and hooks well. The 427 can rev to 7k and make good power.
close your eyes and pick a cam thats close to what has been mentioned.You want more? go 1 size up,you want less?,,,,
I have a comp cam in my engine,works great,makes good power,similar specs but in a small block, roller though
|09-20-2012 10:49 PM|
|377tk||with a 427bbc is the 108 lobe center or 110 going to be better if I go with the 294s cam or do you think it should be wider|
|09-20-2012 07:13 PM|
|vinniekq2||whats your question?|
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