redtail2426

iTrader: (10)

how could you design a cam that makes rediculous torque from 2-5000rpms.I was thinking a smaller duration cam with a real small lsa like 106 or somthing and less lift.give me your thoughts.no concern for high horsepower just maximum area under the curve from 2-5.

ArcticZ28

iTrader: (14)

You'll want a higher LSA cam. The lower the LSA the more overlap you have, thus just blowing the intake charge right out through the exhaust until it closes, losing you torque down low. For 2k-5k you'll want probably a 112-114 LSA. Of course it's all very general and utlimately comes down to the exact valve events you need based on your heads, intake, and exhaust setup.

1989GTA

I would look into the smaller XFI cams. They look to have the potential of having really high torque. You would also need to have a high DCR.

redtail2426

iTrader: (10)

good info,dont you think if it was a smaller duration the overlap would be less,canceling out some of the tight lsa

ArcticZ28

iTrader: (14)

Overlap would be less with smaller duration but doesn't change the fact that the overlap is still greater on a lower lsa. You're still moving the powerband approximately 100 rpm higher for each degree you lower the lsa. You're battling your own goals there.

rollinna65

iTrader: (18)

Ummm...I'm pretty sure that a cam with a lower lsa will peak earlier than a high lsa cam. You don't want a tight lsa on FI cars because it will just blow the mixture out the exhaust. At the same time, on NA cars the exhaust being sucked out helps pull in the intake charge. I'm not sure if a 106 lsa would work but it would be wild...and a pain in the butt to tune.

HeapaShifter

iTrader: (2)

If you want torque coming out your ears get the Patrick G torque cam.
https://ls1tech.com/forums/generation-iii-internal-engine/481382-torque-coming-out-my-ears-cam-change.html

DuronClocker

iTrader: (25)

Pretty cool cam, I like it. 421/400, making 340+rwtq from 3000+

ArcticZ28

iTrader: (14)

You're right, what I meant to say was that a lower LSA will have a very "peak"y curve and that peak will occur lower in the rpm band whereas a higher LSA will peak later but have a less "peak"y curve. For example, a cam with a 112 lsa will have a higher peak tq number lower in the rpm band vs that cam with a 114 lsa which will carry the power later into the rpm band but will have a lower peak number. Lower LSA cams will have technically more torque than a higher LSA cam but what you have to look for is area under the curve (how it actually carries the power or if it's just available for a very small window of time).

ArcticZ28

iTrader: (14)

Just remember this cam in your car may not perform even close to how Patrick's cam does. He spends a ton of time researching the exact valve events his setup needs to produce the tq and hp he desires. This is the way to pick a cam. Don't just pick it, for instance, b/c Patrick made great numbers for it. It was obviously very well matched to his setup. The proper way to go about a cam is figure out your goals (what you're doing now) and then figure out the valve events needed for your setup to reach that goal.

PREDATOR-Z

ArticZ28,
While LSA, ICL, ECL have input in how a cam performs, it is all an issue of VEs and durations relative to the rest of the combo. LSA and such are the VE tuning factors.