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Cam help
I have a 2008 Silverado RCSB 4x4 5.3 flex 4l60 3.73 gears. Will be doing the DOD delete and a cam swap soon. The truck has LT's, Full exhaust, CAI and a tune so far. I'm looking at a TSP 5.3 Stage 3 cam which is a 216/220 600/600. Or a 224R am I heading in the right direction with this?
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Anything that is a 212/218 to 216/220 should be just fine without a converter change. Probably go 112-114 LSA if you daily it, better for idle.
Some like a low lift camshaft over the high lift. Get the right set of push rods and valve springs and it should be good to go. |
in my 02 5.3 I have the 212/218 .550 112 TSP cam and I honestly love it. Has a nice bark on cold starts, idle is nice, made 302whp with it and intake/long tubes
Cant speak for the higher lift version, but I really like how it helped the truck vs the advance 4° LS9 cam the 212 replaced. I also have a Tahoe, so its a lot of weight to get rolling. Stock converter, 4.10s on 33s. |
like said above 212/218 is a solid cam, tsp has dyno charts of both the low and high lift version and i would honestly go with the high lift they show gains from the start of the pull to the end over the low lift version for what its worth, a 114 lsa would be best for idle and lowend
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Would changing the lsa from 112 to 111 give it a more choppy idle?
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Originally Posted by anfking6908
(Post 5456675)
Would changing the lsa from 112 to 111 give it a more choppy idle?
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A true choppy idle is based on the overlap of the cam. LSA only plays a very small portion. What LSA does is dictate “when” the power comes on. For instance, an LSA of 115 may make peak hp at 5500, while an LSA of 111 may make peak hp at 5000. An example is the stock cam. It has an overlap of like -37. That’s why it idles smooth as butter. Cams with +11 and over overlap will chop a damn tree down. Additionally, the more overlap you have in a cam, the more compression and unburnt air/fuel mixture you are bleeding off, which can make it feel lethargic down low without a huge converter. Cams with huge overlaps don’t work well in trucks. |
ANFKING6908 - you first need to decide what type of engine you want - performance or street/durable application. There is such a wide variety of camshaft "application-types" that it can matter a great deal as to just what you get for results. My preference is for street/durable applications. My 08 Sierra went ~200k miles before the AFM died; the topic of which GM largely remains silent about due to "corporate acknowledgement" issues; Huston - we have a problem ... you get it. But that is not the point here.
There are some good write-ups on the "WWW" about LS camshaft applications and how to select a good cam. I have currently selected the following samples for my current considerations; 12561721 & 12623064 - both have about 0.480 in. lift with 1.7 rocker ratio - I want street/durable application - not "performance." Although, I am using 1.82 ratio rocker arms (~0.510 in. lift) and 0.080 in. min. wall pushrods to insure that I get very stable/durable operation. I am also utilizing the 12499224 spring kit & 12596508 spring retainers for long-life mechanical operation. I too will DELETE the AFM - OUCCHHH! ... OBTW - high lift cams are "hard" on valvetrain components - such stress will limit component part-life durability - you can read about this as well - OR - select premium hardware/parts all the way around the valvetrain.;) |
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