I am looking to get the <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> TR224 cam...Which LSA will be better for me...I am looking for a good sounding idle <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> ...Most of my driving is on the freeway with occasional stop and go...I have heard the 114 on a A4 which sounds damn good <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> ...See the sig for details

 

Sorry...Here is my updated Sig...

 

Personally , I prefer the 112 over the 114 primarily because I want my power band to stay at a comfortable RPM. the rule of thumb is that the 112 pulls the power in at a lower rpm and keeps you from having to wind the motor so high to reap the benefits of the cam and the 114 LC will require the motor to be wound a bit higher to achieve those gains. The 112 may have some finicky idle qualities , but most people have gotten that lined out pretty easy by tinkering with the TB hole size and bumping up the idle a bit. That's my .02. Good luck!

James

 

I think the 112 LSA is good for the m6 and a good sounds <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Adnan

 

I see you have M6 , My advice is 112 well be better than 114 , and 114 for A4 is beter than 112

Fahad ..

 

I chose the 114 for its smoother idle and slightly better street characteristics. I also love revs. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> With 4.10s, I think the 114 would be the best choice.

The difference is very minimal.

 

I went with the 224/224 but i got a 110 lsa, i want a mean idle!

 

As to the difference between the 112 and 114 lobe separation angle, the 112 will give you a more aggressive, lopey idle, and move the power band slightly higher. If you plan to run nitrous, stick to the 114 LSA.

 

For some reason there is still a lot of controversy about the effect of lobe separation on the power band. My understanding has always been that a tighter (i.e. 112 in this case) LSA increases peak torque and moves the peak and powerband lower, all other cam specs being equal. Dyno graphs of the T1/B1 bear this out. Although the greater overlap and lower vacuum cause a rougher idle and some bucking right off idle, you come into your peak torque at a lower RPM. If you can stand (or even like) the lope, this helps, rather than hinders, street performance. PSJ or other valvetrain gurus care to comment? I also like a 112 LSA for an M6.

 

TTT.

 

Eventually I was planning on putting a wet kit on the car <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" /> ...Nothing to extreme as far as spraying...Probably just a 75 shot or something...I dont know if this will make a difference as to which one I choose <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> ...dfarmercse
suggested the 114 if I'm squeezing...Thanks for the fast replys...

 

How high are we talking about reving on a 114 to get the power? I will be getting an m6 and was thinking 114 since I have to pass emmissions and want a daily driver. It was my understanding that you would hit peak power at around 6300 or so with the 114 lsa.

anybody have a 114lsa dyno to see where max hp comes in?

Russ

 

The cam's powerband will depend more on intake duration than LSA. All 114 LSA cams will obviously not make peak power at the same RPM.

 

LSA is also an important aspect of scavenging the intake charge which increase performance. Less LSA means more scavenging, to a point.

<small>[ September 26, 2002, 09:07 PM: Message edited by: kewlbrz ]</small>

 

NIneball has posted overlayys of B1 and T1 dynos and they were identical. The 112 simply has a rougher idle. No real difference to fret over. I went with the 114 for the stealth factor.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 77-vette:
<strong>How high are we talking about reving on a 114 to get the power? I will be getting an m6 and was thinking 114 since I have to pass emmissions and want a daily driver. It was my understanding that you would hit peak power at around 6300 or so with the 114 lsa.

anybody have a 114lsa dyno to see where max hp comes in?

Russ</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm going with a 114LSA cam on my M6 just because I dont want the idle to be TOO noticable. All my buddies with M6's and a 112lsa cam tend to make power all the way to 6500rpm with just headers.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by cantdrv65:
<strong>NIneball has posted overlayys of B1 and T1 dynos and they were identical. The 112 simply has a rougher idle. No real difference to fret over. I went with the 114 for the stealth factor.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">couldn't agree better

 

Quoted by TXCAMSS:
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Personally , I prefer the 112 over the 114 primarily because I want my power band to stay at a comfortable RPM. the rule of thumb is that the 112 pulls the power in at a lower rpm and keeps you from having to wind the motor so high to reap the benefits of the cam and the 114 LC will require the motor to be wound a bit higher to achieve those gains.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have that BACKWARDS. The powerband is WIDER with the 114LSA.
It is the larger (114) LSA that pulls better at lower rpms.

To state it differently, the narrow (112) LSA will develop more peak power in a narrower band, and it will be at a higher rpm when compared to a 114 LSA.

As far as idle quality and sound go, a 222/222 @112 LSA will sound and idle similar to a 224/224 @114 LSA camshaft.

 

I think your new sig is the same as the old. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />

 

I'm gonna call Comp first thing in the morning and have their tech guy explain LSA in great detail. I'll let you all know what I find out regarding same cam on a 112 & 114. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />