AJ1794

Hey guys,

I was hoping you could lead me in the right direction in terms of a cam. I have selected a couple cams but I am wondering which would be best for my application. The engine will be the aluminum block L33 5.3L with TBSS intake manifold and ported TBSS TB, Doug Throley tri-y headers, full 3" single exhaust, custom intake and T-56 Mangum transmission. The engine will be going into a 3400-3500lb Chevy Colorado (see sig pic). So the choices are:

Comp 212/218 low lift (or maybe high lift)
Comp 216/220
Comp LSR 269LR

Now I was wondering if there are any beehive springs that could be run with the LSR cam or if I have to buy the expensive dual valve springs.

I'm optimistically aiming for 330-340 rwhp (is that a realistic goal given my other mods + dyno tune?). I'd love to have a good amount of low end torque but I don't really feel it's necessary in such a light truck. I'd like it to have good street manners since that'll be the majority of driving it'll do but also be quick at the strip since I'll take it there from time to time. I just wanted your guys' opinion on my choices since I don't really have any expertise in this area.

99Bluz28

iTrader: (35)

Out of those I like the (54-414-11)216/220 114lsa+2 (-10* valve overlap). but I think a better option is the Cam Motion Titan I (218/222 112lsa+4, lift .586"/.578", -4* valve overlap) which uses fairly mild cam lobe so you can run a set of less expensive PAC 1218 beehive valve springs and have long valvetrain life.
The power band between those 2 will be almost the same but with slightly more duration and valve lift the Cam Motion Titan I should make more power everywhere and still be very daily driver friendly with a noticeable but mild cam lope.
http://store.cammotion.com/the-titan1
http://www.ws6project.com/user_stor/...valve-springs/

01ssreda4

iTrader: (96)

I second the titan1

gagliano7

http://www.briantooleyracing.com/truck-cams.html

lsxdick

iTrader: (4)

I like the cam motion and pac combo as well. So many choices though,

AJ1794

The Titan I is a little on the expensive side for me (gotta take into account CAD/USD exchange rate + shipping).

I was looking at the Vengeance Racing VRX2 last night. Seems like it's exactly what I have been looking for in a cam. 0.580" ish lift and mid 220's duration. Would it ground on a 114lsa+4 be a good performer in my truck?

Keep in mind I'm not looking to brag about max power numbers on a dyno, I just want a truck that is fun on the street that's not just a stock motor. Is this cam with the mods listed in my first post gonna get me close to the 330-340rwhp mark?

99Bluz28

iTrader: (35)

Yeah it's more expensive, but the money you save on not needing costlier stiffer valve spring to control the valves should make up most, if not all the cost difference, and since your whole valve train will last longer you'll save even more in the long run. As far as meeting you goals I'm a little confused as to what they really are since you say you're not chasing dyno numbers, but then you contradict yourself by sounding concerned about dyno numbers.

Fyi, the Vengeance VRX2 uses aggressive XE-R cam lobes which will require stiffer more expensive valve springs, and they will need to be replace quite a bit sooner compared to the running the Titan 1/PAC-1218 combo. Furthermore I think it's bigger than what you give the impression you want. Keep in mind a 224/228 114lsa+4 wills seem larger in the smaller 5.3L compared to a 5.7L engine. Now if you truly feel the Titan 1 isn't going to be big enough then maybe the Titan 2 is more inline with satisfying you wants without raising the powerband very much over the T1. Now it you truck still needs to pass tailpipe emissions testing the Titan 1 is the very largest I'd go with. If it doesn't need to pass emissions then look at the Titan 2 which can still use the same PAC-1218 valve springs.
http://store.cammotion.com/the-titan2

With you modifications 330-340rwhp will require gains of about 60-70 rwhp (from the stock rating) which is possible, but it's on the high side of possibilities for what you want; 40-55 is more realistic.

AJ1794

What style lobes does the VRX2 have? Comp XE-R?

01ssreda4

iTrader: (96)

It uses a better cam core to start with, AND you get an actual cam DR card for YOUR cam not a generic one like what comes with Comp's stuff. You are getting something extra for your money Comp Cams is the Walmart of camshafts

01ssreda4

iTrader: (96)

I practice what I preach brother:





Runs 11.2x on motor.

thunderstruck507

iTrader: (18)

There won't be another comp cam go in anything I own after having 2 of them fail.

Another vote for the Titan here.

99Bluz28

iTrader: (35)

Yes. XE-R .
They do make good power, but they are very aggressive and Comp Cam has what I think are better lobe option available now.

JakeFusion

iTrader: (7)

I second anything from Cam Motion. Spend the extra money. It's worth it.

Plus, modding is an expensive hobby. Get used to thinking... oh $500 here and whammo. $3000 later you're like what?

01ssreda4

iTrader: (96)

Was just talking to a local guy the other day and we got to talking cams and he had a comp fail on him about 1-2 years ago. I've known the guy a while but never knew this. I went over the valvetrain with him in the conversation and nothing jumped out at me as out of place. Just doesn't sit well with me

96capricemgr

iTrader: (1)

Just to make a stronger point. once you get into aftermarket cams valvetrain becomes something of a wear item especially springs.
Sometimes aggressive lobes might make a little more power at first but if the valves start to float 8k miles later it wasn't worth it on a DD.