Head/Cam combo problems
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
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From: Glendale, Arizona
Head/Cam combo problems Alright so I have a 5.3 LM7 and I have chosen to use either the PRC stage 2.5 5.3 heads or the PRC stage 2.5 LS6 heads. But I don't know what cam to pair with it for a decent power gain I was thinking the MS3 at 112LSA or the 233/239 .595"/.603" with appropriate springs and 1.8's but wasn't sure if the cams would be too big. I don't want to do a custom cam. Can someone give me some advice?
I would suggest contacting who makes the head and tell them what your goals are for the car and what mods you have. They will be able to give you the best recommendation.
TECH Senior Member
Joined: Mar 2004
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From: BFE
Alright so I have a 5.3 LM7 and I have chosen to use either the PRC stage 2.5 5.3 heads or the PRC stage 2.5 LS6 heads. But I don't know what cam to pair with it for a decent power gain I was thinking the MS3 at 112LSA or the 233/239 .595"/.603" with appropriate springs and 1.8's but wasn't sure if the cams would be too big. I don't want to do a custom cam. Can someone give me some advice?
Ported 5.3 heads would be my choice, but with very little chamber work to keep compression up.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
Likes: 0
From: Glendale, Arizona
I did email him all he said was that the Ls6 2.5 stages would be a best bet for my power goals which is around 400-450 rwhp nothing on a cam even though I asked about it.
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
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From: Glendale, Arizona
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PREDATOR-Z , really knows what will work good! That would be a means sounding, but very drivable cam with just about the same amount of valve overlap as a MS3 with a 112lsa except with a lot more DD useable HP/TQ .
TECH Addict
Joined: Sep 2009
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From: PA/MD
It seems like for a LONG time lots of people were preaching 112 and only 112 lol....I'm running a 115lsa, but with my 255/263 duration I have plenty of overlap
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
Likes: 0
From: Glendale, Arizona
Thread Starter
On The Tree
Joined: Feb 2012
Posts: 120
Likes: 0
From: Glendale, Arizona
It seems like he's had quite a bit of experience so I wouldn't doubt him at all!
