high LSA cam ?
10-05-2006, 11:57 AM
#1
TECH Resident
Thread Starter
iTrader: (3)
Join Date: Feb 2005
Location: detroit area
Posts: 846
Likes: 0
Received 0 Likes
on
0 Posts
high LSA cam ? im looking to get a mild street cam for my a4 dd and will probably be going with something with a 114lsa or greater because it my my dd and also for stealth affect.
my question is; how much power if any am i leaving on the table going with a 114 than say a 110 or 112?
anyone have a recommendation on a stealthy\quiet cam with great mid range power?
my question is; how much power if any am i leaving on the table going with a 114 than say a 110 or 112?
anyone have a recommendation on a stealthy\quiet cam with great mid range power?
10-05-2006, 12:12 PM
#2
I expected my idle to be almost the same as stock but it does have a noticable lope to it. Maybe it's because we left the idle kind of low. (M6 750 rpm.)
It doesn't bother me, in fact, I think it sounds pretty cool.
My cam is 224/228 .581/.588 114+1. No overlap but it still lopes a lil. Go figure.
It doesn't bother me, in fact, I think it sounds pretty cool.
My cam is 224/228 .581/.588 114+1. No overlap but it still lopes a lil. Go figure.
10-05-2006, 12:32 PM
#4
Originally Posted by TXZ28LS1
im also looking at a 114 lsa cam, just for better drivability, and a little more high end.
My car could use a little more gear but for now it's fine, driveability is good at low rpm. When I get a 12 bolt or 9" I will prolly go to a 3.73.
Trending Topics
i thought it was the other way around
10-05-2006, 03:39 PM
#10
On The Tree
Join Date: Sep 2006
Location: Greenville, Texas
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TchargedLS1TA
Higher LSAs give you better low end power, Low LSAs give you more top end power..
10-05-2006, 04:11 PM
#11
Oh lord lol.
My understanding is that the wider LSA makes for a wider powerband, and the shorter LSA makes for a more narrow powerband. The duration, for the most part, is what dictates where the peak power is made.
Overlap (Valve timing near TDC), and which RPM the idle is set to, dictate how much "lope" you'll end up with.
JM2C
My understanding is that the wider LSA makes for a wider powerband, and the shorter LSA makes for a more narrow powerband. The duration, for the most part, is what dictates where the peak power is made.
Overlap (Valve timing near TDC), and which RPM the idle is set to, dictate how much "lope" you'll end up with.
JM2C
10-05-2006, 05:32 PM
#14
TECH Fanatic
iTrader: (3)
Join Date: Apr 2006
Location: Texas
Posts: 1,284
Likes: 0
Received 0 Likes
on
0 Posts
also matters what advance is ground into the cam from the distibutor .
114 +4 will peak lower than a 112 +0
then you have the valve events , a large duration with 109+0 lsa will out rev or produce a later hp peak than a low duration 114 especially if more advance is ground in the 114. the lower lsa, plus some advance is good for larger durations cams to get back the proper VE' s ,more DCR , and if done right will produce a flat torque curve and peak around 6200-6400rpm which to me is not to high or to low .
114 +4 will peak lower than a 112 +0
then you have the valve events , a large duration with 109+0 lsa will out rev or produce a later hp peak than a low duration 114 especially if more advance is ground in the 114. the lower lsa, plus some advance is good for larger durations cams to get back the proper VE' s ,more DCR , and if done right will produce a flat torque curve and peak around 6200-6400rpm which to me is not to high or to low .
10-05-2006, 10:02 PM
#15
TECH Resident
Thread Starter
iTrader: (3)
Join Date: Feb 2005
Location: detroit area
Posts: 846
Likes: 0
Received 0 Likes
on
0 Posts
so if i looking for a cam with a mild almost stock lope i should be looking at high lsa's but if im wanting lower or more mid range power (for street driving) i should be looking into cam with a lower lsa which will lope alot more and ruin the stealth factor i was looking for. do i have that right?
10-05-2006, 10:31 PM
#17
TECH Fanatic
iTrader: (3)
Join Date: Apr 2006
Location: Texas
Posts: 1,284
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 1999 SS
so if i looking for a cam with a mild almost stock lope i should be looking at high lsa's but if im wanting lower or more mid range power (for street driving) i should be looking into cam with a lower lsa which will lope alot more and ruin the stealth factor i was looking for. do i have that right?
10-06-2006, 12:09 AM
#18
Originally Posted by 1999 SS
so if i looking for a cam with a mild almost stock lope i should be looking at high lsa's but if im wanting lower or more mid range power (for street driving) i should be looking into cam with a lower lsa which will lope alot more and ruin the stealth factor i was looking for. do i have that right?
http://www.chevyhiperformance.com/te..._lobe_phasing/
10-06-2006, 12:09 AM
#19
That's why most off the shelf cams are ground with a high lsa (114) with a lot of advance ground in (+4) so you get the higher peaking power and the powerband moved down a bit to utilize it. The 114 +4 element is probably also used as a safety for people who tend to overcam their car with high duration cams.
10-06-2006, 01:37 AM
#20
On The Tree
Join Date: Sep 2006
Location: Greenville, Texas
Posts: 121
Likes: 0
Received 0 Likes
on
0 Posts
True dat..... I bought a nice high LSA cam for my 94Z years ago, "114". I was pleased with the power increase, but very dissapointed in the lack of lope. 
Kinda sucks to do all that work to change a cam out in one of these things, and then not even be able to tell in it's in there.
Kinda sucks to do all that work to change a cam out in one of these things, and then not even be able to tell in it's in there.
