02CamaroZ28

i was wondering if you guys could post up some graphs, and tell me what you shift at the track. I did a search and couldnt come up with much surprisingly.

Im looking for cam only type numbers/ shift points on a M6.

HaulinHawk

Mines an auto, dont think it will help u much.

02CamaroZ28

Its a general rule that a 112 will make power higher than a 114 correct...or do I have it backwards?

cenTX-LS1

iTrader: (1)

Its also my understanding that the lower LSA will be a bit peakier with the powerband.

FstBlkz28

iTrader: (13)

The 112 will net a higher HP #, it moves the power band down into the power band, aka the power will kick in earlier. For cam only, non FI ... a 112 is probably the better choice. And it'll sound meaner too

02CamaroZ28

I agree but I have a NX kit sitting in my room, and id rather not rev to 6800

black_z

iTrader: (4)

Isnt P2V clearance extremely tight on a 112?

shudog

iTrader: (3)

LSA does not affect piston to valve clearance. LSA is Lobe Separation Angle. Only the lift would really affect the P2V clearance and even then you don't have to worry about that unless you have milled heads and/or cams with more than .600 lift

FstBlkz28

iTrader: (13)

In theory, in an M6 you'd have to rev a 114 higher to get the power out of the cam. In other words, say the 112 hits 400hp "peak" at ~6100. The 114 would peak at ~6300 ... but probably wouldn't make 400hp. All the #'s above are hypothetical, i dont' know where the x3 peaks off the top of my head.

The cam I have in my car made power all the way to 7000 in a forged engine. In mine, I pull it to 6400-6500.

magius231

iTrader: (8)

There are a lot of things that affect PtV clearance other than lift (think about this, duration affects how long the valve is held open so if its open when the piston starts coming back up, you could have PtV issues). Always check a cam when installing to make sure, don't trust anyone's word on your motor.

s346k

iTrader: (4)

what?

you are incorrect.

max valve lift occurs when the piston is at the BOTTOM of the cylinder. HOW LONG (aka the duration) the valve stays open is what causes ptv issues.

i've looked at many dynos regarding both cams, it appears when properly set up, both will like to be shifted around 7k (maybe 6,800 at the earliest) and will make similar power (within a few hp). both have beautiful power curves...and both have a very nice idle. being an m6, i would opt for the 114 lsa, simply because the ptv is tighter on the 112 lsa. you have a little more cushion with the 114 lsa if you ever miss a shift or tag rev limiter...also, a 114 lsa would react better to n2o.

i think the g5x series of cams are simply badass. call lg and ask about the g5x4.

yak

iTrader: (15)

ok, if you are spraying you want an x3 on a 114. nitrous likes a lot of rpm. You will probibly need to spin to 6800, don't worry I spin mine to 6950 and I have an a4. the 114 will make power a little higher up and will probibly make a few more peak ponies. both cams will make good powa. the PTV is a little tighter on a 112 but it will still fit, mine did. although you can expect around 410 rwhp on a good tune and mid 11's assuming you know how to drive it . I plan to run 10's this season on a H/C A4 powered by a x3

PREDATOR-Z

You got that backward.
Lift has little effect on PTVC. It is the Duration and LSA that affect it (ie: the VE's)
You can have a cam of equal size fit just by changing LSA.
Like my Trqr V2, It will not fit my heads (2.04 int/1.575 exht) on a 112 but on a 113+0 it does perfectly.

SideStep

Really

Then why does LG fly-cut when using the 112 lsa??? and/or recommend it to their customers that are buying the 112 lsa G5X3???

PREDATOR-Z

Someone posted what the clearance was with the 112. I will fit but PTV values are way tight (less than .055 int IIRC)

Louis

iTrader: (7)

There is no need to spin it to the moon, and there is no reason these shortblocks wont live at 6800. Set the limiter at 6900, and shift it at 6700.

114 will make peak power from 62-6400 depending on the combo

112 will make peak power 61-6300 depending on the combo.

FUN LS1

Actually, the lift doesn't affect PTV much, since highest lift is attained when the piston is way down in the cylinder. The issue with PTV is based more on duration and how fast the valve opens. Big duration cams with aggressive lobes are more likely to have PTV problems than short duration and huge lift.

[EDIT] Darn, I knew I should have read down further before replying to this one...

02CamaroZ28

Thanks for the help guys, Ill shoot LG a call sometime in the future and see what the reccomend. Im leaning towards the 114 if the stock short block can handle the rpm's safely like most of you say.

Maybe theyll tell me the x2 is better for me.

HaulinHawk

Mine is on a 114lsa ,peaks at 6550 rpm and im shifting at 6700.No reason to spin it too the moon.

s346k

iTrader: (4)

after i swap cams, i'll spin mine until it stops making power...i just hope my countless hours of research play a role in my custom grind..