LS 5.3 into 87 K5

[F-ingrob]

What cam are you guys using In these
Still have to deal with smog so nothing to big
700r4
488 gears
35” going to 37” tires When these are worn
Some insight please

 

[ZooMad75]

I ran a stock cam with 4.10's, 35" tires and a 5.3/700r4 combo. No issues for me. The problem I saw with any cam other than the stock LM7 was the loss of torque down low. Even the LS1, LS2, LS6 and LS7 cams pushed the torque curve up 1,000 rpm up the curve. Most of the aftermarket cams do the same. I've not gone back to look at the newer cams out now so there may be so more truck-centric cams out there that don't sacrifice low end torque so much.

 

[Rugby_7]

I had the 5.3, 4l60e, 35s, 4.10s in my blazer. It could have really used a set of 4.88s.
Ended up going a different route and now its a LQ4 with a LSA supercharger

 

[F-ingrob]

Ok Thanks but
Do not want to waste money on a supercharger still have to maintain smog just asking for opinions on camshaft

 

[eric67camino]

In my research for mine, I found this article. I've not run it, but looks promising.

http://www.trucktrend.com/how-to/engine/1909-truck-torque-adding-cam-muscle-counts

 

[F-ingrob]

In my research for mine, I found this article. I've not run it, but looks promising.

http://www.trucktrend.com/how-to/engine/1909-truck-torque-adding-cam-muscle-counts

Thank you

 

[eric67camino]

Welcome. If you try it, please report back. I'd be curious to hear real world feedback.

 

[toomany]

I have the BTR Stage 2 Truck cam in my 5.3. Been happy with it for the most part. I never drove the 5.3 stock in my swap in truck so I don't have much to compare it to.

Current set up is, 5.3/4L60E/D60/14B/4.88/35's. If anything, I could use a little more power up top. It runs/drives great, but when on the highway at 70-75mph, when you go to pass someone it seems like you have to give it more throttle than necessary to get the power you need. Not a huge deal and probably not directly related to the cam. More of a 6000lb truck with a smallish motor issue. Any other time I don't feel like there is a lack of power.


https://briantooleyracing.com/btr-camshaft-gen-3-4-truck-stage-2-v2-btr31218110-btr31218110.html

Edited for the link

 

[F-ingrob]

Thank you

 

[jkroberts]

The BTR stage one or two truck cams are what you looking for. Go onto YouTube and search for Richard Holdener and he does a comparison between a few of the truck cams in a 5.3.

 

[F-ingrob]

The BTR stage one or two truck cams are what you looking for. Go onto YouTube and search for Richard Holdener and he does a comparison between a few of the truck cams in a 5.3.

Thanks BTR is the way I will be going