Why no hyd. cams over 230 duration?
Why no hyd. cams over 230 duration? Is that the limit of the hydraulic valvetrain? I dont see any for sale anywhere or hardly anyone running them. Or is it due to the stock pistions and P to V clearence?
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Joined: Nov 2001
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From: Freeland, MD
Re: Why no hyd. cams over 230 duration? The so-called "S1" cam, run by a number of people on this board, is a 244/244 .610" hydraulic cam. Pretty much only used in big-displacement LS1s as it is too big on duration for stock cubes.
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TECH Regular
Joined: Jan 2002
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From: Austin, TX
Re: Why no hyd. cams over 230 duration? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">So, did LGM release there cam spects?
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Verdad Gallardo Re: Why no hyd. cams over 230 duration? They did on the G5X-1.. look in the thread about their new cam..
If 230 is lazy for stock cubes, then whats up with the solid rollers running ~240? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
If 230 is lazy for stock cubes, then whats up with the solid rollers running ~240? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Re: Why no hyd. cams over 230 duration? If you are running a cam 230 plus I hope you are running 4.10's plus.. I do not know where people are getting this lazy at lower rpm's from.. Yes a smaller cam will have more power down low, but by 4000rpm the horsepower is pretty much equal until the bigger cam takes over.. If you are dropping below 5000rpm between shifts when racing then you need to shift quicker..
Re: Why no hyd. cams over 230 duration? Im gonna run a Custom CompCam XE-R Lobe 232/230 .595/.592 114 0Adv, car doesnt shift below 5k with the stall converter and i plan on shifting at 7200
<small>[ March 03, 2003, 08:59 PM: Message edited by: T/A Medic ]</small>
<small>[ March 03, 2003, 08:59 PM: Message edited by: T/A Medic ]</small>
Re: Why no hyd. cams over 230 duration? 232/236 114 +4 XE-R lobes in my car now. not wild about it so I'm going back down to a 228/228 114 +4 to gain a little more midrange TQ and a lower idle and lock-up rpm.
Re: Why no hyd. cams over 230 duration? Comp Cams has some pretty nice lobes in the 230º-244º range. I suspect that do to a somewhat limited intake manifold setup, the larger cams won't produce the high rpm power that they should. The bigger cams reduce low end torque and coupled with less than optimum high rpm capability there is diminishing return. Tuning for the larger cams is also taking some time to figure out. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
Of course, some are probably trying but not commenting. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Of course, some are probably trying but not commenting. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Richard <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Re: Why no hyd. cams over 230 duration? I'm about to fire mine up with a custom grind
232/228 XER and a custom made short runner carbon fiber intake manifold. I'll post the results.
232/228 XER and a custom made short runner carbon fiber intake manifold. I'll post the results.
Re: Why no hyd. cams over 230 duration? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Richard@WCCH:
<strong> The bigger cams reduce low end torque and coupled with less than optimum high rpm capability there is diminishing return.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">WTF????? The longer duration cam is need to support the higher rpm range. On a stock cam, the rwhp peaks at about 5800 or 5900 rpms. Up a longer duration cam in and the rwhp peaks in 6200+ range.
<strong> The bigger cams reduce low end torque and coupled with less than optimum high rpm capability there is diminishing return.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">WTF????? The longer duration cam is need to support the higher rpm range. On a stock cam, the rwhp peaks at about 5800 or 5900 rpms. Up a longer duration cam in and the rwhp peaks in 6200+ range.
Joined: Nov 2001
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From: Cecil County Raceway!!!
Re: Why no hyd. cams over 230 duration? 232/232 112LSA cam here in stock cubes. Not exactly lazy IMO (expecially for a 3600 lb car) <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<img src="http://home.earthlink.net/~krzewinskibe/newdyno.jpg" alt=" - " />
<img src="http://home.earthlink.net/~krzewinskibe/newdyno.jpg" alt=" - " />
