Considering to very similar cams but the lsa is 110 vs 114! Can someone tell me the pros and cons please!

ok here you go.lobe seperation angle is measured in degrees
lsa is the amount of degree,s measured from the center line of intake to center line of exhaust. with lsa,s of 100-110 increases the amount of time both valves are open at the same time with wider lsa 110 to 116 decreases the overlap time allowing more pressure to build in the cylinder. wider las will give you more vaccum build more torque at lower rpm speeds because more air is trapped in longer allowing you ti idle better also run power brakes etc. and improved fuel milage and youll have a wide power band more towards a street lcl with some track use. narrow lsa will bad choppy idle lopey power brakes will be stiffer and your torque will move upwards from 2500 to 3000 and up givving you upper end torque and horsepower and around town bottom end will suffer and your power band will be more narrow hope this is understandable for you and helps some. where do you plan to use your car at most street or track what accessories do you want to run? then look for a happy medium in choosing a cam

motown are you a trans plant? I see your in cal!So are saying the 114 is wider and thus will have more vac/torque than the 110?

the 114 lsa cam will have less overlap than than the 110 lsa. because of this the 114 lsa will make more vacuum and run cleaner and smoother at lower rpms.

overlap is the time both the intake and exhaust valves are open.

as far as power, a cam with a 110 will make more peak torque where the 114 will make wider range of torque, the 114 may rev slightly higher as well.

basically like was mentioned above, the tighter the lsa the more narrow the powerband. the engine will make better peak numbers, but average numbers will suffer.

I am by far no expert, but it was explained to me that a wider LSA will produce more "overall" torque, over a longer range, but less peak torque and as a result less peak hp.
How much power or whether you would really care in a street car is a question better left to someone who knows. I don't know how differently my cam (10:1 454 256/260 @ .050 112 LSA) would have responded to a 110 or even a 108, but since its 95% street, I'm not after every hp, just a goal I've yet to reach. Given enough money I'd love to set my engine up on a good dyno and run a bunch of different cams and a few different intakes and maybe a different carb.
BTW, my 454 doesn't idle well under 1000rpm even with the 112. That might be the consequence of my moronic tuning abilities though..

Sorry for the thread grab.

hth
matt

Matt,

You have 34* overlap at .050, so I would not expect your cam to idle at 1000. I has been advised some time ago to try to keep .050 overlap to around 10* or less for a decent enough idle quality that would allow for power brakes (w/o canister) and also run provide enough grunt to run my A/C. I have a hyd roller cam that I am probably going to run that should come in with a lot of midrange power - 287/290, 233/236, .600/.610 on 112LSA/108ICL. 10.5* overlap at .050. Think this will provide a very noticible idle yet still pull good vaccum in a 9.5/1 454 motor. I was really toying going smaller but think this will work well.

no not a transplant and sorry to leave the holes they pretty much filed them in where i left out .

am I messed up or are you guys contradicting one another? :confused:

Originally posted by 70convt396:
am I messed up or are you guys contradicting one another? :confused: Nope, go back and read carefully. everyone has pretty much said the same thing in different words.

my experiance has been with cam around the 116 lobe sep. mark will really allow the motor to run high in the rpm range. makes for great top end power. like the old ZL-1 cam i used to run i think it had 116.5 lobe seperation and with a 262/273 @ .050" it idled nicely at 750 rpms. had a nice rump to it but that sucker would idle down to 450 rpms without stalling. (and thats probly from my good tuning ability's) but to get a good solid idle that sounded strong 750 was right...it didnt have really nothing for idle vacuum it had around 4"of hg but it ran darn hard to 7500 rpms......

other cams i have ran in the 108 and 110 range seem to be stronger in the mid range.....and would have just as much radical idle as the old ZL-1 cam even thou the numbers @ .050 was shorter around the 230 range.