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Old 12-22-2008, 01:45 AM   #1
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Default Cam for 5.3 with supercharger in mind

I know the "5.3 cam" topic has been beat to death, and ive spent the last several hours reading, but still have a few questions.

My truck is a 2004 silverado with the iron block 5.3 (LM7). I have pacesetter longtubes, pacesetter ORY, and single 3" exhaust with a mangnaflow muffler. I have a S&B CAI and I installed LS1 electric fans.
I have a 5" lift with 325/65/18 tires (35x13s) and 4.56 gears. Have also done extensive tuning with Hptuners with my wideband.

My plans for this truck are basically in addition to what ive done, I want to add cam, supercharger, probably trans next and with a 2400 (ish) yank torque converter, then replace the 10bolt with a 14b.

The 4.56s with 35" tires are the biggest I plan on going with ie, no more lift since practicality falls off pretty quick after that.


From what ive read, being a lifted truck and all, high duration is a bad idea. So I was thinking somewhere in the 200-210 range with .55 lift and 112lsa. I dont really care about the sound at idle, I am more concerned with how it performs. The biggest stall I want to go with is 2400rpm, so I am looking at rpm range from 2000-6000, with the emphasis on the low and middle. Although would a SC not pretty much take care of all low-end needs?

Ive seen the Comp XR259 mentioned quite a bit as well as the Comp 218, but wasnt sure how these will work with the blower since I dont want to change cams twice. What is the main difference in a cam for boosted and a cam for N/A?

Any suggestions on specs and/or cams would be great. For springs I was planning on some yellow LS6 spings since I dont think big lift is what I need.


Thanks
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Old 12-22-2008, 07:29 PM   #2
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if your going with a supercharger look to higher lsa's. A proven magnuson cam is the lingenfelter gt2-3 which has a 118.5 lsa, it helps to keep from blowing your boost right out the tail pipe.
http://www.lingenfelter.com/store/l210125297.html
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Old 12-22-2008, 08:48 PM   #3
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Go with something in the 210 range and around 114+2 lsa something around there would perform well! A friend of mine runs a vinci cam similar to what I listed and it performs very well. Just my .02
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Old 12-22-2008, 08:55 PM   #4
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the GT2-3 is the cam...tried and true. Like 006rcsb said a higher LSA is desired for blown aps. 115+
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Old 12-22-2008, 09:23 PM   #5
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Something like this.

http://www.trickflow.com/partdetail....1&autoview=sku
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Old 12-22-2008, 09:37 PM   #6
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How would the Lingenfelter cam work in an LQ4 with plans of adding the supercharger later? I think it would be awesome with in my wife's truck until the Maggie. If we put a Maggie on it, otherwise it will get something close to what Zippy built for his Tahoe
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Old 12-22-2008, 09:39 PM   #7
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Quite a few LQ engines running the LPE cam with the 112.
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Old 12-22-2008, 11:13 PM   #8
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hey trever1t how do you like the lingenfelter gt7 cam for fi? compared to the 2-3?

http://www.lingenfelter.com/store/l210095297.html
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Old 12-22-2008, 11:16 PM   #9
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I know two people that have run the gt7 on LQ4 engines very sucessfully!
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Old 12-22-2008, 11:21 PM   #10
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what about for a 5.3, with the reverse split and with less lift than the 2-3 and 121 center line.. do you think its too much? and whats the 230 degrees of exhaust duration all about, i don't plan on running headers, would that help out with exhaust flow?
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Old 12-22-2008, 11:21 PM
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