How would this cam do?
Thread Starter
Staging Lane
Joined: Jan 2002
Posts: 50
Likes: 0
From: Tomball, Texas
How would this cam do? The cam I was thinking of is a comp grind the specs are:
226/226 .585/.585
The car: 98 Z28 A4, Macs, ORYP, lid, 3500 stall
Now what my main question is what LSA should I get it on a 112 or a 114. I realize that a 114 would yeild more top end power but what would be the benefits of a 112? Will the torque peak at a lower RPM than the 114? Also if I go with the 112 how much advance should be ground in? +2? +4?
Let me know what you guys think <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Any help is greatly appreciated
TIA,
Blake
P.S. I can live with the drivability of a 112
226/226 .585/.585
The car: 98 Z28 A4, Macs, ORYP, lid, 3500 stall
Now what my main question is what LSA should I get it on a 112 or a 114. I realize that a 114 would yeild more top end power but what would be the benefits of a 112? Will the torque peak at a lower RPM than the 114? Also if I go with the 112 how much advance should be ground in? +2? +4?
Let me know what you guys think <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Any help is greatly appreciated
TIA,
Blake
P.S. I can live with the drivability of a 112
On The Tree
Joined: Sep 2002
Posts: 140
Likes: 0
From: Lakewood, OH and Grand Marais, MI
Re: How would this cam do? What I can tell you is that all other things being equal, the 112 LSA will give you a rougher idle, but better midrange torque and higher peak torque. Peak HP should be about the same, with power falling off a little more quickly after peak with the 112 LSA. This seems to be the rule on cam comparisons I have seen.
Guys with M6's tend to favor the tighter LSA, with more A4'ers opting for wider. I think this is due mostly to idle concerns with autos, which can, however be overcome by raising the idle speed with programming.
With your high stall 'verter I would think 2 degrees advance should be good enough for the low end and give you good power up top with the 112 LSA. Keep in mind there is usually some slack/retard in the stock timing chain.
One other note: that cam should make great power, but lift may be a little higher than is worthwhile with stock heads, and will require some really good valve springs. I don't think I would go that aggressive on ramps without some stage II heads with a double spring setup. Just my $.02. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Guys with M6's tend to favor the tighter LSA, with more A4'ers opting for wider. I think this is due mostly to idle concerns with autos, which can, however be overcome by raising the idle speed with programming.
With your high stall 'verter I would think 2 degrees advance should be good enough for the low end and give you good power up top with the 112 LSA. Keep in mind there is usually some slack/retard in the stock timing chain.
One other note: that cam should make great power, but lift may be a little higher than is worthwhile with stock heads, and will require some really good valve springs. I don't think I would go that aggressive on ramps without some stage II heads with a double spring setup. Just my $.02. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Re: How would this cam do? 226/112 is a great cam with a big stall and some gear. 226 is about the max I would personally do in a stock cube car that is daily driven.