anyone interested in my hotcam kit ?
 

thinking about selling it if theres any interest .. might go with a different cam

I would be interested....Catch me on msn or give me a call :)

Call me after Johnny.... or even before...:p ;)

hotcams are for girls :eek:

I bet I could beat you with a Hotcam :) Oh wait I am already 2 tenths faster :p

hey payam
u trying to get rid of anyother parts
my car is to slow

thats all i got for now

buy this and some headers and u wont be slow anymore

how much u want for it:D

$350 .. comes with cam, springs, lifters, pushrods. you can reuse the stock retainers and buy new valve locks if u wish (their cheap)

what cam you gonna go with??

a blower cam

what can you rev a hotcam to?

they pull to about 6200 rpm

my CC305 was makin power all the way to 6500 .. thats when it started to drop .. it peaked around 6300

hotcams rev a little higher due to the 112 LSA

next question, the springs,lifters etc.... how much RPM can they handle? and what set of 1.6 RR do you recommend?

the springs will handle 6500 rpm as well .. not to worry .. the only thing that i might spend more money on would be lifters .. you dont have to .. but stock lifters would probably bleed off around 6200

for rockers, i'm gettin a set of crane golds (same ones that come with the kit) from mike soon .. i was gonna keep 'em but we'll see how bad you want them sandeep ;)

I'm interested if your other possible takers fall through

only other possible taker is sandeep .. lets see what he says

No.

a 112 LSA tightens up the powerband. The higher the LSA the larger the TQ peak but the narrower the band.

A tighter LSA brings the IVC (intake valve close) valve event closer to BDC (bottom dead center), but increases overlap. The IVC timing is the primary factor for how high in the RPM a cam peaks, while overlap helps determine the size of the peak. An earlier IVC will peak lower in the RPM.

Therefore a CC305 will rev higher due to a later IVC event which results from a couple degrees more duration and a wider LSA.

So thats why a cc305 sounds lumpier? hmm From what I heard the power difference between the two is negligible.... Payam, call me when you get a chance, either on my cell or a t work 604-527-9257.....

they should sound roughly the same, their overlap is very close. The 305 has slightly more duration, but the lobes are a little more seperated. This would also mean that the torque peaks would be similar in height, but the hotcam will make a little less peak power (like 2-3 hp all other things being equal) at a slightly lower RPM.

No, your wrong

the lower numerical LSA, the looser the separation the higher the hp band gets pushed. thats why NA cams have low LSA, ie 110 and lower and rev to the moon.

more overlap will make more power in the upper rpm due to exhaust inversion (not sure exactly what its called) when the exitting of the exhaust creates some vaccum in the cylinder to acheive %100+ volumetric efficiency NA. on the other hand, it costs the cylinder pressure to bleed in the low/mid rpm causing the lack of torque

thats why blower cams are all really tight 114+ lsa

Sorry man but you are wrong.

LSA = lobe seperation angle. a numerically lower LSA brings the intake lobe peak and the exhaust lobe peak closer together.

This tighter LSA increases the torque peak but shortens the powerband - thats just the way it is. N/A cams go with tight LSA's because they want to maximize TQ within the powerband they are designed for.

Please read this thread on LS1tech... it will take a while to read through the 250+ posts, but you will get a better handle on how the different valve events affect powerbands and TQ peaks, etc.

http://ls1tech.com/forums/showthread.php?t=101100

The exhaust suction on the intake charge is caused by overlap, which is based on IVO, EVC and LSA. You are right, this does improve VE, and thus the TQ peak, which is what I am talking about. However, this alone does not determine powerband, just the size of the TQ peak. Powerband is determined by how long after BDC of the intake stroke the intake valve closes, which is based on duration. Again, read that thread and you will see what I am talking about.

And to achieve 100%+ VE you need "Inertial supercharging", which is based on RPM and the IVC event I have already talked about. Basically the faster an engine revs, the more force it applies in pulling the air slug in to fill the cylinder. This gives the air more inertia at high rpm. Having a longer duration allows more of this air to enter the cylinder even after the piston has hit BDC and stopped pulling on the air. Hence, why the IVC event (which contributes to the duration figure) is the most important event to consider when determining powerband. And remember that tightening the LSA actually closes the intake valve earlier, thus lowering the powerband! Hopefully you are seeing it now...

:Owned: :D

actually .. not really .. I still stand by my word and thing craigo is wrong .. i just dont feel like arguing over the net anymore

i'll just kick him square in the nuts tonight :p

did you even read that long ass thread??? that stuffs way over my head, im not even gonna bother arguing:D

You are both right.

then they both :Owned: each other:D

It was my understanding that a lower LCA, the higher you had rev the motor to take advantage of the cam....say 4k to 7k. Where higher LCAs was more for low end power in the 3k to 6k area.:think:

Cam tech=:confused:

Yes and no. a tight LSA will hurt bottom end but once you get to the powerband (which is narrower due to the tight LSA), the torque peak will be nice and strong, but it will drop off fast once you pass the peak. higher LSAs will help bottom end power and top end power past the TQ peak, but they dont have a pronounced TQ peak.

hey craig since you knw so much, wanna make me up a turbo cam spec card ??

In a round-about way I was trying to say that, but you did a better job explaining it.

A LCA@109 would be a great drag racing cam. An awesome peak power curve at high rmp. A 4k stall and your flying off the line because your immediatley in your powerband, but, the power under 4k really isnt there. Along with idle issues, it would make for a sh*tty street cam.

A LCA@114 however, provides steady power throughout the RPM range making it a way better street cam. You also dont have to rev your motor to 7200rpm to take advantage of the power curve. A 6500 redline with wicked bottom end torque is probably what most people are looking for in a good setup.

Someone correct me if Im wrong. :p

almost there.... the point at which the peak TQ (and thus power) is made is mostly (but not completely) determined by the intake valve closing point, which is influenced mostly by duration, but also by intake centerline (i.e. if the cam is installed straight up, advanced, or retarded) and lastly by LSA. tightening the LSA will actually pull the powerband down a bit since it pulls the intake lobe back 1/2 a degree for every degree of LSA tightened.

So the point here is you could have a tight LSA giving a good TQ peak, but if the duration isn't there or the cam is ground with too much advance, the peak TQ will occur earlier in the RPMs. This would result in way less peak HP then if the TQ peak occured higher in the RPMs by going with more duration.

A great drag racing cam will have the peak TQ roughly halfway between the shifted to RPM (say 4k RPM after you shift into gear) and the desired redline (say 6500 rpm), and will have the biggest TQ peak possible by using a tight LSA - however this will sacrifice low end driveability.

An interesting problem with LS1's is that peak TQ always occurs at 4800 rpm no matter how big the cam - this is due to the intake runner design. Knowing this - why do so many people run massive cams when the high RPM powerband they are trying to achieve cannot happen due to the intake? The simple answer is that they have no idea about cam theory and just shove a big stick in there which hurts their bottom end and does very little for the top. If you look at dyno charts the big cams dont event succeed in easing the TQ rolloff after 4800.

THis means that there really is no reason to go bigger then say a 224/228'ish duration - in fact the fastest C5s from Cartek all run cams about this size - coincidence?

Great write up Craig .

yeah yeah yeah thats all nice and dandy .. now someone buy my cam

I said I was interested..what did Sandeep say? Ball's in your court
:D

ok .. i'll give deep another day to decide then :)

SOLD!!! :D

indeed :thumb:

good looks like somebody has some money for me then:D