Black Z28 M6

Oh sh#t. Do you have a blower, turbo, or NO2. Those are pertty big numbers to be all natural

Mssingkid

iTrader: (7)

227 Duration right?? I have a cam here waiting to be installed(Soon as my heads get here once again). 227/232 .640/.595 110(+1). With my setup i got 10.9 SCR and 8.5 DCR. Should make good power all around. I'm not a fan of high revs, so i want it to shift at round about 6300, but that may change depending on what the dyno shows. Be sure to post up your numbers when its done MARKSZ71

Brian Tooley Racing

iTrader: (13)

We have consistently seen with HYDRAULIC ROLLER cams with faster ramp speed, higher lift cams make less power everywhere and float the valves sooner. One of the most powerful N/A Ford 306 cu in cars on my dyno would turn 8000 RPM with factory unmodified lifters, the lobes used were the BBC Extreme Marine low lift. I challenge you to find a slower lobe then those, when we put in faster ramp lobes the car made less power everywhere and floated the valves 1000 RPM sooner. The spring pressure was 180 seat 400 open. With good heads, fast ramp rates are not the answer. We have also seen lower lift lobes (.580") make more power then some of the higher lift lobes (+.600"), not to mention how much easier the lower lift stuff is on parts.

Black Z28 M6

With 110LSA the Power band is not going to be as wide.
Therefore like Mssingkid said he going to have to sift sooner.
6300 sounds right, but then I dont know. I like to REV high to make power.
I belive Brian Tooly is right. Faster lobes are not the answer.
Fast lobes give you better cylinder pressure so the the troq hit sooner (only 300RPMs)

advertise DUR DUR@.050" lift Lift 1.7 rocker
273 224 .581
268 224 .581

The 268 will have better idle quality and better low end troq (not much)
so I see why people like fast ramps
But fast ramps do float valves
we need REV-Kits baddly
I like to REV REV high or dont REV at all
Higher REVs make more power
(of coarse right cam, good flowing intake, heads, exhast)

Patrick G

iTrader: (14)

Believe what you want. My setup makes strong power down low and up high and everywhere in between. It is not a narrow powerband. This goes against what some are saying on this board. Check the small size cam I'm running, then check the lobes...LSK on intake and exhaust. No valve control problems and no power coming up short. Dyno graphs and mod list when you click my signature.

Of course, it may just be that the AFR 225 heads are so good.

Black Z28 M6

Thats true. AFR heads are the best. But you said LSK lobes are not fast ramp lobes when you compare them to XE-R.
The LSK has faster ramps. Faster then XE-R Bro.
I like Hyraulic Roller Lifter Cams. I thought XE-R were the most aggressive HR cam lobes when it first came out. Then I saw the LSK lobes and I said dang thats almost like a solid roller.

We know you have a good set-up. AFR heads, and good spring pressure.
We know also that the LS1 is has a bigger base circle than the LT1, and all 1st gen SB Chevy, they are in the same family, just like LS1 and LS2
Fords OVH engines also have a small base circle. So they Float Valves sooner then the LS1.
Brain Tooly and I were talking about cams in general.
and Yes 110LSA has a narrower power band than a cam with 114LSA

Patrick G

iTrader: (14)

If not the best, certainly up there. No, I made mention that the LSK lobes are slower than the XE-R lobes from .006" to .050", but faster from .050" to .200". This faster ramp after .050" along with an arc that better follows the momentum of the lifter (which wants to loft) is one of the breakthroughs that allow the LSKs to work better than the XE-rs.
After .050" yes, from .006" to .050" it's slower than the XE-R. The duration from .050" to .050" is what really determines how aggressive a cam is anyway and in this area, the LSK is much more aggressive than the XE-R and one of the big reasons why it makes more power. The softer ramps from .006" to .050" lower the tendancy for the valves to bounce on the seat.
I thought that too. That's why I'm running them and have been for over a year!
Agreed.
Not necessarily. It's all about proper valve events. A 114LSA cam with overlap biased to the exhaust side of TDC is probably not going to have as broad a power band as a 110LSA cam with overlap centered over TDC (like my cam). If you ever look at my dyno sheets, you'll see lots of power down low and up high. It's very balanced. Not what most people would expect from a 110LSA cam. But then again, too many people on this board are brainwashed into believing that only a wide LSA cam can make broad power. It's all about selecting the proper valve events and overlap.

Asmodeus

Hmmm... interesting that you say that.

SLED28

iTrader: (7)

I should have results from a AFR 225 headed 402 LS2 with LSK intake & XER exhaust in the next few weeks. Trying to give the intake a little kick in the ***!

LSX-Racer

There's something off in the valvetrain then or maybe it's just mis-matched parts.
Assuming this is a NMRA/FFW race engine with limited lift? Where is the comparision? Why do we need 8000+ RPM LSX street engines?
Lift is your friend, if you use it properly.

miami993c297

iTrader: (6)

Thank you to bring your lights in this thread LSX-Racer.

I guess your comments are based on experience, tests and engine build....

Question:
Is it possible that some Heads could like the extra lift and some others could just choke with it???
Btw awesome nice pics in your sig !!

Christian

Black Z28 M6

good to know. From .006 to .050 its slower. So LSK will float less then XE-R
So the the more aggressive nose doesnt really contribute to more valve float.
So its from the seat to .050
I always thought that it was the bigger the nose, the more valve float you get
and also more valve chatter
I learn something new every day

PREDATOR-Z

AMEN TO THAT

JMBLOWNWS6

iTrader: (17)

How about we make my car a tester with the LQ9 heads and a TSP blower cam Im putting it back together starting Thursday night

Patrick G

iTrader: (14)

If you look closely, Jason made that offer in October of last year. He's probably on to 10 different projects since then.

JMBLOWNWS6

iTrader: (17)

LOL We deal with him daily I just read the post LOL Didnt check the date

Black Z28 M6

Did you have to notch the pistons with that cam? Are you running stock bottom end(346 stock stock)? And Compcams make that cam right?

Patrick G

iTrader: (14)

Although my 346 has valve reliefs (from previous larger camshafts), my current cam does not require them for stock shortblocks running aftermarket heads (although P to V is tight with the AFR 225s with their 2.08 intake valve). The duration and installed centerline of the cam determines P to V clearance, not lift. It's a pretty small cam, duration-wise.

Black Z28 M6

Cool man. Thanks