I just read a previous thread from May 2003, trying to find results on the comp 212/218 cam in a 5.3. First I talked to someone that works at Thunder Racing, and he suggested the high lift that is installed in his 2001 4wd truck with a gain of 40rwhp with the 114lobe. However, the previous thread that I just looked at was installed in a 2000 5.3. It seems to be the low lift, because their was nothing mentioned about it being a high lift. In the thread that I read the results were 43rwhp gain over stock. Should the high lift make a little more power with low lift? I would rather go with the low lift if it going to make the same power. Is this the same story, maybe gator's99ta could help out on this one?

 

they make a high and low lift 212/218 cam.

212-218-522-529-114

212-218-558-563-114

 

From what I know, if you plan on keeping the stock heads, the high lift version will likely yield little gain over the low lift version. The low lift would be easier on springs. But I reserve the right to be wrong on this...

 

I heard the same thing. Thus why I didnt get the high lift 212/218.

 

They do make a high lift version of the came, but it has to be custom made at the comp cams facility. They do make the 265 high lift but with a 115 lobe seperation. However you can order it with a 114 lobe seperation

 

Comps 212/218 high lift will yield better results than the low lift version of it

 

I understand that the LS1 is a different motor than the 5.3, but in two recent articles in mags. the 265 cam only made 29 flywheel horses. If I decided to use the 265 low lift can I expect 40rwhp gain out of the 5.3? That is what I want to achieve and I dont want to buy a cam that is only going to give me little horses, but I still drive it on a daily basis. Can 40rwhp be coaxed out of the 5.3 with the low lift 265 because i plan on keeping the stock heads.

 

You seem very concerned with measurement....which isn't a bad thing, but my experience with asking for it from other people here is that not too many people do before/after dynos with their stuff. For example, no one that I knew of did strict before/after dynos with a Radix install. I did. Maybe you will have to be the person to do it.

FYI, I've heard that on an otherwise stock 5.3L, the low-lift gets ~30HP.

 

Yeah, the standard "low lift" cam is a 212/218 @.050", 265/271 advertised, .522/.529 lift on a 114LSA.

The "high lift" is a 212/218 .558/.563 @ .050", 265/271 advertised, on a 115LSA.

The main differences between the two are the extra ~.030" lift, and the 114 vs 115 LSA. I think the LSA makes the biggest difference between the two cams.

If you notice the lobes have the same @ .050" and advertised duration, so the lobes are very similar.

I saw the post (I believe I did) about the 5.3 making an extra 40 horse with the 212/218 high-lift. If you notice, the truck also got a ASP pulley installed at the same time, which is good for about 10-15hp from what I hear.

The flip side to that, is that some people say the ASP pulley "doesn't dyno well", meaning the pulley is most noticeable when revving through the gears quickly - not doing a long dyno pull locked in 3rd.

I think 40hp would be doable with good headers, free flowing cat-back, tuning, and (at least?) a drop-in filter.