t1blackout

iTrader: (6)

My buddies are arguing over what the difference is between 112 and 114 LSA on the F-13 Cam. One says that the 112 makes its power lower in the powerband, and the other one is arguing with him. Which is it?

If you have a cam with exactly the same specs except for the 112 vs 114 LSA, which one makes its power earlier / later in the powerband? What are the differences and advantages and dissadvantages of these two different LSA's on the same cam?

Thanks guys, there is money riding on this so please be accurate!

TA TECH

iTrader: (8)

The 112 makes power earlier and the 114 peaks later! 112s are good for M6s and the 114 with less advance is better for A4s with a decent stall size!

jrp

iTrader: (16)

are the ICL's the same?

GREATWALLTA

112 lopes harder and idles rougher, 114 is little more tame and still makes good power.

TWISTEDTA

Yea well...I hope the 114 wins this one for A4's cuz i just orderd that little basterd...

t1blackout

iTrader: (6)

Is there any administrators of this board that can post up an answer? This isnt really proving anything yet. I just want to know if 112 LSA Peaks before or after the 114 LSA.

KCFormula

iTrader: (4)

Its not as simple as you make it out to be. Given everything else being the same the 112 will peak a little harder (higher) but at a higher RPM, and the 114 will have a flatter powerband and peak a little lower. The biggest difference is the shape of the powercurve not the place it peaks.

TWISTEDTA

Ok everyone has a run around question NOT saying they arnt helpful but how much is "a little higher" or how low is "a little lower"??

Or in other words how much Hp am i missing out on by getting the 114 instead of the 112?

t1blackout

iTrader: (6)

I just want to know about the power curve itself... Where does the 112 have most of its power, how about the 114?

Rudolph

iTrader: (1)

If you take a look to this site, you will get a much more clear answer, and that way you will be able to answer yourself based on your own judgment:

http://www.compcams.com/Technical/TimingTutorial/

Nice page.

IMO, as long as you have a good set of headers, and a good intake, the less important the LSA angle will be

Take a look to that page.

Spinmonster

112=earlier peaky powerband

114=broader higher powerband and higher ultimate horsepower-and easier to tune on average....at least I found that to be the case.

Both assumed to be in the same motor.

Lower lobe separation is a fix for limited rpm use. The 114 is the better choice if you can rev to where the power is but the lower end would benefit more from gearing. You choose the cam specs based on your engines rpm range and application. If you have an A4 that is shifting at 6200 you need a cam that is in that power band and not one that pulls to 7100. Installing any cam a few degrees advanced retards the power band and installing it retarded advances the band. (adjustable timing gear set needed.)

I'm sure one of the regulars will post a long cut and paste answer but I think that covered your question.

hpjunky98

iTrader: (3)

112 peaks earlyer

GuitsBoy

iTrader: (4)

112 does peak earlier, but the 114 has a broader power band which may make the cam feel like its making more power down low and therefor give the impression that it peaks lower. It does not.

777

iTrader: (21)

Given everything the same except one is a 112lsa and one is a 114lsa. The 114lsa will peak later.

Phoenix 5.7

iTrader: (7)

im no expert either, but from all i have read:
112, rougher idle, peaks earlier, more suited for manuals
114, smoother idle, peaks later, more for autos

some even go lower, i talked to someone with a 108 in their car that they took on most of if not the whole power tour(think it was VSGLS1)

better yet, PM ANY of the sponsors that sell cams, they can tell you the answer for sure. Allan at Futral really knows his stuff, he might be a good one to talk to.

Smartass6885

iTrader: (3)

from what i have been told, generally if all specs are the same the lower LSA will peak earlier and make a few more HP. but i have the FMS13 in my car and it is on a 111 LSA with +1 timing built in. it peaked at 6800rpm. my car is a 6 spd and the only other power mods it has is lid/K&N, flp headers, 3" y-pipe with hi-flow cats, and borla exhaust and it dynoed 393rwhp@6800 after being tuned. the tuner set the rev limiter at 6800 since i am on a stock bottom end and dont want to run the motor too high in the RPM's.

krexken

That may blow the entire universe out of order.

11SECDWS6

iTrader: (3)

I believe some of you have it *** backwards. A lower LSA means more valve overlap which generally means higher dynamic compression which generally means the motor will make power in a higher rpm range than a cam with a higher numerical value for LSA. I say generally, because it is not always true. The duration of the intake also plays into the formula. Do a search for "valve overlap formula" and I'm sure its out there. But, the more valve overlap you have, the higher the rpm band (generally).

Also, look at Futural's homepage. They have listed the power bands for each of their cams. The cams like the t-rex have a much higher power range on a lower LSA than the smaller cams.

Naked AV

From all the research I did....

The 112 peaks higher, but is a narrower powerband.

The 114 peaks a little lower, but is a broader powerband.

The peaks are in the same place, determined by duration.

If you want to move the peak up or down, advance or retard the cam.

1LoudTA

iTrader: (11)

that last one just contradicted itself... how can one peak higher than the other but peak in the same place?