Been doing some searching for a friend with a 5.3 truck. not finding what i want. On tech they have a few listed like the thunder racing cheater grinds but they have all been designed around a 5.7... so what may idle stock in it may lope in a 5.3... ls6 cam comes to mind as they r cheap then the gt23... question is which cam will work with stock manifolds make good power and never know its cammed?

 

I run the GT-7 and got a noticeable power increase, N/A. I've brought it to the dealership and they can't tell it's cammed.

 

I looked into that... I think they have discontinued that cam with the release of the cheaper ls9 cam with similar specs. Although i dont think the ls9 cam has the rear type traditional cam sensor. exhaust duration seems a tad high. how do you feel the cam compared to stock? Is there a loss in low end?

 

Anything with a 116+ LSA is hard to tell. Mine is 207/220 118.5 and it sounds damn near stock, even though stock is actually 196/196 116.

 

Thats the gt23?

 

yep

I put 300 down with tuning and exhaust with 35" tires and a 14b on a mustang dyno. Only thing was peak torque is damn near 5000rpm and peak hp was around 6400, so its definately a high-end cam while NA.

 

The GT2-3 is going to idle like stock yet work very well with stock exhaust to deliver nice gains.

 

about how much to people see out of the gt23

 

With a stock muffler or something pretty large, and running LS6 springs to keep the valvetrain noise down (that means a low lift cam), it shouldn't be hard to hide a decent sized cam.

 

a few years back my friend had a MTI Stealth II cam, it was a 220/220 on a 115LSA, and it sounded bone stock on his 5.3, seriously no one ever knew it had cam, it was a crewcab and it ran a 13.4 in the quarter..