Raughammer

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by VINCE:
<strong>Raughammer did you say your heads are milled 60 thousandths? Do you have stock pistons with the C2 cam?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Posted earlier in the thread:
"The C2 worked with out fly cutting the pistons and the heads have been milled .060 I believe."

...And yes the pistons are stock GM.

Campbell

Raughammer

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong>John cambell, are advertised duration ratings for Comp XE and XER rated at .006"? I have chart for these lobes but i dont know what lift advertised ratings are at. Thanks in advance,
from, Big cam victim <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sir, No, the XE-R and XE duration ratings are measured at .050. There is a chart of the available lobes on my web page in the cam section.
Lift is measured at the top of the lobe and then multiplied times 1.7 (an LS1's stock rocker ratio), duration is not a factor in that advertised measurement.

Sorry you were a big cam victim. You are not alone in that....lots of folks have mistakenly gone down that road, much to their chagrin.

Good luck.

Campbell

VINCE

iTrader: (1)

Thanks Raughammer.. A nonmember of this board was telling me that the C2 cam would not work with my 42 thousandths milled heads when I knew it would..

Bob Smith

Cam Specs: CC306
Dur. @ .50 - 230/244
lift int/exh - 544/576
lobe sep. - 112
Degrees of advance ground in - 4 deg.
manufacturer - Comp
vendor -
Tranny - 4L60E
CID - 396 LT4
Aftermarket heads - GTP race port LT4
Headers- Grotyohann LT's
N/A, F/I, Nitrous- N/A
Computer reprogrammed - Ed Wright
throttle plate drilled (size) - 58mm
Goals - daily driven/drag racing
idle/lope - Nice lope, 13" vac
Which spring was used - Comp 987
rwhp - ?
rwtq - ?
ET - 12.76 (4000 DA)
raceweight - 4500lbs
comments : Impala SS

Freak

Is there a way to update these after being filled out? I dont wanna fill it out if I cant add stuff like dyno numbers and what not later on...

Raughammer

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Freak:
<strong>Is there a way to update these after being filled out? I dont wanna fill it out if I cant add stuff like dyno numbers and what not later on...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well you could edit your post here at a later date... or email me after I have input your data on the web page.

Good question, thanks for bringing it up.

John Campbell

VINCE

iTrader: (1)

I was just going to ask the same thing.. Once you have it done could you put your link again..?

Raughammer

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Jason99T/A:
<strong>John, are you using 5.3 truck heads or LS1 heads?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Jason, I am using MTI stage 2 LS1 Heads.

Raugh

VINCE

iTrader: (1)

Hehehehe.. MTI's Stage 2 are 4.8/5.3/5.7/6.0?

Freak

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Raughammer:

Cam Specs: Comp Xtreme Energy
Dur. @ .50 - 224/224
lift int/exh - .567/.567 (per Cam card. advertised as .568/.568)
lobe sep. - 112
Degrees of advance ground in -4
manufacturer - Comp Cams
vendor - IRS
Tranny - M6
CID - 346
Aftermarket heads - No
Headers- FLP long-tubes Hooker Longtubes/Off road Y
N/A, F/I, Nitrous- N/A
Computer reprogrammed - Not yet, wating on Edit
throttle plate drilled (size) - Not yet
Goals - daily driven/drag racing Street Strip toy
idle/lope - (smooth, lopey, chaotic) lopey
Which spring was used - (918, MTI Dual, 941) 918/titanium retainers
rwhp -
rwtq -
ET -
raceweight -
comments : I havent had this cam in long, but I love it so far, definetly not my idea of streetable if I had stock gears, with my 3.73s its streetable but slightly annoying, surges ocasionaly under about 1500 RPM Keep trying to drive like it has stock cam, and having to downshift a gear. Also have to take more car on takeoff so as not to stall. It reminds me of driving a stock geared and cammed car, not too much worse really. 4.30s were already planned. I belive these will make it totaly streetable. For the most part my problems are idle ones, which should be worked out with driling and Edit.. Happy so far!!

</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

<small>[ March 24, 2002, 12:51 AM: Message edited by: Freak ]</small>

Raughammer

OK, the cam page has been updated with the new info.
And I put in a handy reference chart at the top of the page that will make it easier to surf, just click on the cam you want to read about and it should take you right to it. I also put the cams in order of their intake duration.

Hey, ya'll let me know if I need to edit anything...

BTW, I use MTI, Stage 2, LS1, 5.7 liter, 98, non-center bolt heads. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Smartass! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Raughy
http://xs-fx.com/raughammer/

VINCE

iTrader: (1)

Thanks... I was just asking.. Not trying to be a smartass.. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

LS1derfull

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Raughammer:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong>John cambell, are advertised duration ratings for Comp XE and XER rated at .006"? I have chart for these lobes but i dont know what lift advertised ratings are at. Thanks in advance,
from, Big cam victim <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sir, No, the XE-R and XE duration ratings are measured at .050. There is a chart of the available lobes on my web page in the cam section.
Lift is measured at the top of the lobe and then multiplied times 1.7 (an LS1's stock rocker ratio), duration is not a factor in that advertised measurement.

Sorry you were a big cam victim. You are not alone in that....lots of folks have mistakenly gone down that road, much to their chagrin.

Good luck.

Campbell</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">John, thanks for condolences, i think you missunderstood my question.Let me explain, the advertised duration figures on that Comp chart are not marked at what lift the duration was measured, this gives you a look at how agressive the lobe profile is from seat duration to .050" lift duration. The adv. duration has to be measured at a specific lobe lift, and i am curious what that lift# would be?

Silver99Z

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Raughammer:
<strong>
Cam Specs:
Dur. @ .50 - 222/222
lift int/exh - .544/.544
lobe sep. - 114
Degrees of advance ground in - ?
manufacturer - Lunati
vendor - Agostino Racing
Tranny - M6
CID - 5.7L
Aftermarket heads - No
Headers- Grots w cats
N/A, F/I, Nitrous- N/A
Computer reprogrammed - No
throttle plate drilled (size) - Not Drilled
Goals - Road Course & some street use
idle/lope - Smooth idle
Which spring was used - Comp
rwhp - 361.3 cutout closed
rwtq - 358.6 cutout closed
ET - Don't drag
raceweight - ?
comments : Too soon to comment. Install was just finished yesterday and car driven home on expressways.

</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

LJ_Z28

Cam Specs: IRS recommended
Dur. @ .50 - 226/226
lift int/exh - .585"/.585"
lobe sep. - 112
manufacturer - Comp
vendor - IRS
4L60E
346 cid
IRS Stage II heads
Dynatechs with a 3" OR Y-pipe
Naturally Aspirated and Nitrous
Computer reprogrammed - Will be LS1edit
throttle plate drilled - yes
Goals - daily driven/drag racing
idle - don't care
lope - don't care
rwhp - don't know yet
rwtq - don't know yet
ET - don't know yet
comments : I will let ya know... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

LS1derfull

John, you are correct in your explanation, i have a very good understanding of cam lobe differences, and the tech. factors that make them differ. What i am thinking is by comparing lobe duration at Advertised spec to .050" spec this will give you a better idea of how cam will affect cylinder pressure and idle quality. The .200" duration is important for area under the curve, and power potential of cam lobe plotting.But this is a duration # that we dont have from previous popular cams for lS1, so we dont have much basis for comparison between XER lobes and other more common cams. The best lobes are the short seat duration large .050" and .200" duration and big lift, i agree with that, but streetability is better judged looking at seat duration. Comp seems to use .008" for adv. XE and XER lobes, but if they were measured at .020" this would be misleading info, some cam grinders use .020" for adv. duration.

Raughammer

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong> i think you missunderstood my question.Let me explain, the advertised duration figures on that Comp chart are not marked at what lift the duration was measured, this gives you a look at how agressive the lobe profile is from seat duration to .050" lift duration. The adv. duration has to be measured at a specific lobe lift, and i am curious what that lift# would be?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, I guess I did misunderstand you.
There is no way for me to tell you what the lift was that the advertised duration was measured at. You will need to call the manufacturer. Sometimes it is .001 or .005 but it varies from manufacturer to manufacturer. Comparing the ADV to ADV from one company to another drove folks nuts in years past, and this is why manufacturers now use the "@.050 value"...So we can compare different cam durations to one another from a measured set point. The .050 point is the industry standard.

On to the chart:
Now you are right they don’t tell you what lift the ADV was measured at...but they do tell you what lift two dur. points were measured at. That being at .050 AND at .200
With these two known values you should be able to extrapolate the information you need.

For example: (off the bottom chart on my cam page)
XE 224 lobe; 224@.050 & 124@.200
XE-R 224 lobe; 224@.050 & 146@.200

From that you can say that the XE-R lobe is going to be opened for 146 degrees of rotation, from .200 to .200. And the XE lobe will only be opened 124 degrees of rotation above .200. So above the .200 point, you can see the XE-R lobe is going to have to open the valve faster and hold it at the highest point of the lobe for MUCH longer.
In other words the XE-R lobe is open above .200 longer, letting more air in. And is closed (on the seat)longer improving idle and raising cylinder pressure.

If you were to use the ADV for these cams and use a data point of .001 for lift, or as close to zero as you want...You could do the same thing. (To look at how aggressive the lobes are by comparing ADV to .200 duration)

BTW, it's kind of cool that the 224 XE-R lobe has less TOTAL duration than the XE 222.
224 total duration = 273
222 total duration = 275
This is because the XE lobe takes longer to get off it's seat and longer to get back down to it's seat. This is most evident in the .001 to .050 range.

I hope I have answered your question or at least given you a way to get the measurement you seem to be looking for. NASCAR is on TV right now and to say my attention is divided between the computer and the TV would be a gross understatement.

Good luck.
John "NASCAR fan" Campbell

<small>[ March 24, 2002, 04:09 PM: Message edited by: Raughammer ]</small>

Raughammer

Any new updates? New cam numbers?
Where are the G5 dyno track times? TR224?

Sare your info fellas....it really helps out the newbies. (and the not so new folks)

campbell

Mike Hoffpauir

Cam Specs: FMS F4 Cam
Dur. @ .50 - 226/226
lift int/exh - .575"/.575"
lobe sep. - 114
Degrees of advance ground in -
manufacturer - Cam Motion
vendor - FMS
Tranny - A4
CID - 346
Aftermarket heads - STOCK HEADS
Headers- long-tubes
N/A, F/I, Nitrous- N/A
Computer reprogrammed - YES/FMS TUNING
throttle plate drilled (size) -
Goals - daily driven/drag racing
idle/lope - (smooth, lopey, chaotic) smooth-lopey
Which spring was used - 26918
rwhp - ?
rwtq - ?
ET - 11.40@117.89
raceweight - 3350
comments : Racing wise: I'm very happy with this cam, and with a little more sorting out I know I can squeeze a better et and mph out of it. Street wise: The cam has good street manners, and isnt too noticable with closed up borla. There is a little bit of shake in the car while sitting at redlights, but it's just enough to remind me that I have an aftermarket cam.

<small>[ April 20, 2002, 02:28 AM: Message edited by: Mike Hoffpauir ]</small>

didor80

iTrader: (1)

Cam Specs:
Dur. @ .50 - 222/222
lift int/exh - .563.563
lobe sep. - 114
manufacturer - comp cam
Tranny - M6
CID - 346
Aftermarket heads - MTI's S2
Headers- Mac's
N/A, F/I, Nitrous- never
Computer reprogrammed - Ed Wright
throttle plate drilled (size) - nope
Goals - daily driven/drag racing
idle/lope -lopey
Which spring was used - MTI Dual
rwhp - n/a
rwtq - n/a
ET - n/a
raceweight - n/a
comments : I love it