LS Motors and HP + TQ

OleCoot

OleCoot

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Jul 8, 2013
So I've decided to go with a LS in the LJ. Ryan aka @Bunker Buster with Rev Limit is my goto guy on these, But I have more questions than Carter has liver pills or Reagan had jelly beans, and I don't want to be texting or calling him every 5 minutes :chrfal:

Since the LJ will be a dual purpose rig, kinda decided to just leave it stock, but stock is no fun. now I'm sitting here thinking about cams, springs, heads, intakes, etc.

So what I have decided so far is a 5.3, using the Edelbrock Pro Flo IV ECU and harness. those two are all the firm decisions I have so far. I asked Ian what headers he used on his LJ and he went with LS3 manifolds, but also said the Holley Manifolds also fit. So now I'm trying to make up my mind which cam would be best but not rock bouncer rowdy.. there are tons of web pages and stuff on LS motors, I just gotta get myself educated.

Reddog is doing a LS for his 72? Chevy Truck. but he got a nice long block to go with.

anybody else go input ( about LS motors) , feel free to post in this thread. we can get our own knowledgebase going.
 
found this today....

Edit: more for street stuif than offroad. Oil pump mod was interesting tho

 
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I really like the Texas- Speed stuff. Those guys will answer any questions you have about a cam. You can tell them what your plan is and what mods you have and they’ll point you in the right direction. The right cam is very important. Bigger is not always better.
 
I would stay with 224 or less duration @ .050 with a tight lobe separation. I like Texas Speed as well and also like Cam Motion. We just did a 5.3 swap in a YJ and went with C6 Corvette manifolds because they are so short and made it easier for the exhaust to clear everything. I do have a set of C5 manifolds here, that are a little longer than the C6.
 
anybody have a pair of LS3 exhaust manifolds they are tired of tripping over?
 
These are some pages I have been going thru to get educated.
www.onallcylinders.com

The Definitive Guide to LS Engine Specs and LS Engine Upgrades

This is the ultimate LS engine swap or engine upgrade resource. Scroll through the tables below to find the LS or LS-based Vortec truck engine that you own or are …
www.onallcylinders.com www.onallcylinders.com

www.onallcylinders.com

LS Tech: How to Delete Variable Valve Timing (VVT) on an LS Engine

Variable Valve Timing (VVT) is a system that automatically adjusts valve timing. GM used VVT on the following engines within the LS family. (Summit Racing’s Paul Spurlock and Brian Nutter contributed …
www.onallcylinders.com www.onallcylinders.com

www.onallcylinders.com

Ask Away with Jeff Smith: The Ins and Outs of LS Cam Swaps - OnAllCylinders

I’ve heard that changing cams in an LS engine is really easy, but I’ve never worked on one of these engines before and I don’t want to screw it up. …
www.onallcylinders.com www.onallcylinders.com


If your tired of seeing the LS sales posts on craigslist and FB look here, you can find late model, running engines for a lot less than the high mileage stuff on CL and FB.

I was told that you can find a lot of useful info on the LS engines and wiring on this site.

Body Builder Manuals - GM Upfitter

The Light and Medium Duty Body Builder Manuals that are published by Upfitter Integration contain a wide range of technical information, including electrical schematics, body and frame dimensions, exhaust system modification, etc. The Body Builders Manual contains information that may be used in...
www.gmupfitter.com www.gmupfitter.com
 
Hit up eBay and get yourself a oe supercharger off a ctsV and call it a day.
 
Speaking of barbells...
 

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Opinions on re-using Rod and Main bearing bolts on a 5.3 ? I've read posts on other sites and its split 50 \ 50
 
My thought is, if they are not extremely expensive, I would replace them for peace of mind. When I used to build motors way back when, I would just order the entire engine bolt/stud kit from ARP. But that was many moons ago........
 
Being TY, reusing them will throw off the torque specs slightly. We re-used the rod and main bolts in Kyle's when we put new bearings and crank in and haven't had an issue. ARP bolts are not too terribly expensive. The 6.0 in the '28 will be putting down a lot of horsepower, so we went with ARP everything top to bottom, for the added insurance.
 
Mitch said:
Bunker Buster said:
Being TY, reusing them will throw off the torque specs slightly. We re-used the rod and main bolts in Kyle's when we put new bearings and crank in and haven't had an issue. ARP bolts are not too terribly expensive. The 6.0 in the '28 will be putting down a lot of horsepower, so we went with ARP everything top to bottom, for the added insurance.
Click to expand...

My thought is, if they are not extremely expensive, I would replace them for peace of mind. When I used to build motors way back when, I would just order the entire engine bolt/stud kit from ARP. But that was many moons ago........
Click to expand...

I agree...

Summit number for mains - https://www.summitracing.com/parts/sum-910229
Summit number for Rods - https://www.summitracing.com/parts/nal-11570662
Harmonic Balancer Bolt - https://www.summitracing.com/parts/nal-12557840
plastiguage - https://www.summitracing.com/parts/slp-spg1
 
From my research anything that is not torque to yield can be re used, That being said its a miner expense and no more work and good insurance to replace them. Besides I like spending YOUR money...
 
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