ls1_cam2

iTrader: (1)

Whats the difference and what it directly affects??? Also one more question get a 112+0 or a 112+5 and why??

Thanks

FUN LS1

The Cammotion lobes are not as aggressive as the XER lobes. It directly affects PTV, since most of the XER cams also have hefty durations, but most cams will still fit in a stock set up. Need to check PTV on the cam once you mill the heads. It also affects spring wear.

The "+" means degress of advance ground into the cam. Increasing the number moves the HP peak and curve earlier and down a little and increases low-end torque. You lose some high end HP, though. I haven't seen any +5 grinds, mostly +2 or +4. Cams can have no advance +0 (usually left off) or be retarded "-x", too.

Beast96Z

iTrader: (21)

The XE-R lobes are "bigger" for a givin duration, which means they are a bit more aggressive. The valve will open sooner on the XE-R by a small margin allowing more flow for a givin duration vs. it's competitor. This will directly effect your low end power. On the other hand, were talking about a degree or 2 in duration, it's not like it's alot of HP givin both lobes are the same .050" duration. Advancing the cam will bring the power on sooner in the rpm band, but it will also fall off the same amount on the top end. Advancing should be selected by what you are going to do with the car. Alot of street driving would like more advance for that "off idle" grunt, but the track car would like no advance because you are working in the higher rpm's. The higher the rpm's, the more air you can move, thus making more power.

Ryne @ CMS

iTrader: (10)

i have not personally used cam motion cams, i have only used comp xer's, comp's are a proven power maker, but from what i have seen from futral, these cam motion cams make some good power, i would imagine those lobes are pretty aggressive themselves.

ls1_cam2

iTrader: (1)

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ok so if the car is going to see 50/50 street and track time then would i go for a +2 or keep it retarded???

black_z

iTrader: (4)

What cam are you running? For a larger cam (230+ on I and E) I would go +4. For a smaller cam, +0 or +2. I am more about area under the curve than peak #'s though. I would rather make 390/385 then 400/370. Another factor to consider is how comfortable you are spinning your motor to a higher RPM, what gears (possibly stall) you have.

ls1_cam2

iTrader: (1)

Well i will be purchasing either the F14 or Torquer so i guess for that size cam i would go for a +4 or +5.

Also I know that the XER lobes tend to put more wear and tear on the springs, but how often will I have to replace or check???

Beast96Z

iTrader: (21)

With a larger cam like that, the +4 will be good. There's isn't much more reson to go any higher than that.(+5) Spring wear is relavent, and will happen sooner with the harder lobe, but there are many good springs out that are standing up to the harsh lobes. PRC, Patriot, Comp 921's, etc...... You'll probablly start to feel the power start to fall off in the upper range due to valve float when the springs start to wear. I would pull one spring at 15k to check the pressure, then set up a interval after that to check.

ls1_cam2

iTrader: (1)

Thanks thats the exact information I was looking for. I think I am leaning towards using the XER lobes(Tourquer).

ls2 bait

iTrader: (11)

i noticed on the torquer vs f14 that ive been doing that the power band on the torquer is 1800-6400 and the f14 is 2200-6800. is the tsp cam already have +4 ground into it?

FUN LS1

No, off the shelf cams are +0; you have to ask for advance/retard to be ground in. I've noticed the advertised power band of the Comp lobes starts lower for similar sized cams. I assumed it was because the more agressive lobes get the intakes open sooner down low for more power quicker.

Beast96Z

iTrader: (21)

That's not true. I'd say 90% of vendors cams have +4 already ground into them. You usaully have to ask to have it removed if you don't want it. Diffrent vendors list diffrent "average" power bands. Notice on Futrals website that the F14 112 and 114 both have the same power band. You've changed LSA, yet your power stay exactlly the same?? Nope. It's just a "average". Don't stake alot of claim in it.

ls2 bait

iTrader: (11)

well id dont want to rev my car over 6400-6500. so looks like the t2 is a better choice because of the xer lobes coming on a bit quicker.

JZ'sTA

iTrader: (23)

I say both cams are very similar. If you have 4 degrees of advance ground in (+4) it will help bring the power band down and 6400-6500 shouldn't be a problem.
I did however believe you were looking into a 114LSA.
If so then the +4 will defentially be needed for what your trying to accomplish.
I have seen some go as far as +5 but not too often. Seem like if your wanting 5 degrees built in then a bit smaller cam might be a good idea or a different lobe seperation is needed.
Also the F13 is available like we talked about and as said before the power band isn't always exact. Next time you swing by the shop I will pull up the 232/234 cam only setup on the computer and show you his dyno sheets. This might help you in your decision. That is almost exactly what your combo will be.
Stock heads, all bolt ons, with a ported TB and LS6 intake.
Sorry I didn't think of that before.

black_z

iTrader: (4)

How would a F14 or Torquer 2 act on a 110 LSA? The same as a 112+2, with a choppier idle?

Ragtop 99

iTrader: (7)

No. The 110 LSA has more overlap and can make more power. I assume that you also plan to keep the ICL on 110.

black_z

iTrader: (4)

Yes Iw ould keep the ICL on 110.

Beast96Z

iTrader: (21)

112+2 is not the same as 110+0. You've tightened the LSA with the 110, thus changing power band and overlap. Lots of people get that confused, but LSA and advance are two diffrent things.

black_z

iTrader: (4)

A 110 will peak lower than a 112, correct?

Ragtop 99

iTrader: (7)

should peak around the same, the intake valve timing is unchanged, only the exhaust is changed. For the 110 LSA, I would expect a little more torque and the power to drop off a little sooner