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L83 Cam Swap

Evanski9

By Evanski9
in Engines & Drivetrain

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Evanski9 Enthusiast

Evanski9

Posted
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Posted

Why would a mild cam be annoying for daily driving?

 

 

Just the chop and lope at idle. I drive alot of city in heavy traffic.

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crafferty Senior Enthusiast

crafferty

Posted
Posted

 

 

Just the chop and lope at idle. I drive alot of city in heavy traffic.

I don' think that would bother me at all. I daily drove a GT500 this past summer to work in city traffic.

thewhitestallion Senior Enthusiast

thewhitestallion

Posted
Posted

that single cab truck sounds like shit. idk if it is the exhaust or the cam but it sounds like it is farting. I love the way a cammed lsx motor sounds but not on that truck, but it does move out.

ToesonTheNose Enthusiast

ToesonTheNose

Posted
Posted

that black truck in teh first vid sounds mean as hell. I used to swap our cams in my ricer acura days many years back. cheap way to add decent power. there appears to be a lot of power locked up, i'd love 400rwhp damn

07Softail Senior Enthusiast

07Softail

Posted
Posted

I saw Comp Cams make 3 different grinds for the gen V DI engines. I read an article on a swap in a new LT1 Vette with the biggest cam. It also needed the VVT limiter, new valve springs installed and a custom tune. If there's enough cam swaps out of vettes there should be factory LT1 cams out there for cheap that would be more of a direct swap for the L83 without messing phaser.

It's REAL CHEAP... I was given a LT1 cam that has maybe a 100 miles on it and considered using it but I think the 5.3 will suffer low end torque loss.

 

RT

  • 3 weeks later...
Evanski9 Enthusiast

Evanski9

Posted
  • Author
Posted

Anyone have any updates. I have been shopping around and talking to some vette speed shops in So Cal

 

 

They think they can get about 415 Hp to the wheels with a tune. He said he was going to look into keeping the low end power.

 

 

Have not heard back from him.

darkfox1 Senior Enthusiast

darkfox1

Posted
Posted

400whp from a 5.3 would be ~ 110whp gain if I recall correctly on what I've read from stock dyno numbers.

 

I'd believe that with headers, intake, tune and a good cam.

 

I do wonder though about the real cost of a cam swap with these. You know the L99 camaro is very limited over the LS3 6 speed cars because of VVT and DOD. You either have to do an "ls3 conversion" and delete all that stuff, which costs big bucks, or go with a lower profile cam.

 

I mean you're in the engine anyway but.. needing new lifters means having to take the heads off, which means new head bolts, gaskets, you probably need new springs..

 

If you're out the door on a cam swap for less than $1100 I'd be surprised. For 110whp though.. that's chump change. That's almost as much as what folks are seeing with the magnuson supercharged 5.3s.. and those chargers run about $6500..

 

I've been waiting on TSP to catch up with the new DI motors to see what kinda numbers they pull. I used to call them and pick their brains every couple of days when I had my LQ4 project going on. :lol: I settled on a 228r cam from them with that truck motor and even it pulled 405 at the wheels on a 99 RCSB 4x4.

07Softail Senior Enthusiast

07Softail

Posted
Posted

It depends on what your goal is...Do you want a screamer that makes all of the power up top (track time) or is it a daily driver where low to mid TORQUE IS KING. I wouldn't chase the HP numbers to much... Your HP number is the Torque curve carried over time. Get a really good mid range torque cam with these heads it will pull up top with a proper tune and low to mid range will be brutal. Remember HP is fast Torque is Quick!

 

RT

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

My thought is that a cam that will allow for 100 hp gain will kill the economy big time. Any of you guys run anything like this in these LS motors?

Chris Senior Enthusiast

Chris

Posted
Posted

My thought is that a cam that will allow for 100 hp gain will kill the economy big time. Any of you guys run anything like this in these LS motors?

Ive never seen a cam give supercharger numbers, and that said the donkey dick cam will kill idle and economy
Spurshot Senior Enthusiast

Spurshot

Posted
Posted

Ive never seen a cam give supercharger numbers, and that said the donkey dick cam will kill idle and economy

 

I was humoring them...emoticon_cheers.gif

14'SilveradoLT Enthusiast

14'SilveradoLT

Posted
Posted

I'd love to see 370lb tq at ~4000K rpm and gains under the curve prior to that (I should've just got the LTZ, lol). I don't think that's ask too much at all from a cam.

 

Anything that's going to get a 5.3 to that 400whp range is going to kill the fuel economy for sure.

DirtyMarcus Enthusiast

DirtyMarcus

Posted
Posted

I'm sure most of you know but don't forget about having to replace springs at almost every oil change. That's the worst part about cam swaps imo.

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