More power form a 5.3

Toddy · Jun 17, 2009

Got a 5.3 truck motor and want to warm it up a little. What is best bang for the buck? I have heard a cam will help alot. Might go with the LS1 intake in which case I will run it backwards so I dont have to mess with the front acc. Just wanting to do a few little things to it before I start on the chassis.

Toddy

BamaTJ · Jun 17, 2009

Cam and a flash will wake the Gen III stuff from what I have heard.

midsouthfab · Jun 17, 2009

Matt O. said:
Cam and a flash will wake the Gen III stuff from what I have heard.

with the right cam, a set of comp 918 springs, and a good tune you can bump a 5.3 75hp to the tires. :****:

1TONZR2 · Jun 17, 2009

I have an LS6 cam/springs and custom tune on my 5.3, seems to work pretty damn good, although I think we could squeeze some more out of it if we really tried.

yellow2.5yj · Jun 17, 2009

What is the part numbers on the the ls6 cam and springs you have? are you still running the stock truck intake?

1TONZR2 · Jun 18, 2009

LS1 Camshaft Specifications I have the 2002+ LS6 cam, dont have a part number for it. you can usually find them pretty easy on LS1tech or some similar website.
1998 - 2000 Fbody
202/210 int/exh @ 0.05" duration
0.496" / 0.496" int/exh lift
116 LSA

2001 - 2002 Fbody
197/207 int/exh @ 0.05" duration
0.467" / 0.479" int/exh lift
116 LSA

2001 LS6 cam
207/217 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
116 LSA

2002+ LS6 cam
204/218 int/exh @ 0.05" duration
0.551" / 0.547" int/exh lift
117 LSA

GMPP Hot Cam
218/227 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
112 LSA

GMPP ASA Cam
226/236 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
110 LSA

6.0 LQ9
207/196 int/exh @ 0.05" duration
0.479" / 0.467" int/exh lift
116 LSA

5.3 LM7
190/191 int/exh @ 0.05" duration
0.466" / 0.457" int/exh lift
114 LSA

midsouthfab · Jun 18, 2009

1TONZR2 said:
LS1 Camshaft Specifications I have the 2002+ LS6 cam, dont have a part number for it. you can usually find them pretty easy on LS1tech or some similar website.
1998 - 2000 Fbody
202/210 int/exh @ 0.05" duration
0.496" / 0.496" int/exh lift
116 LSA

2001 - 2002 Fbody
197/207 int/exh @ 0.05" duration
0.467" / 0.479" int/exh lift
116 LSA

2001 LS6 cam
207/217 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
116 LSA

2002+ LS6 cam
204/218 int/exh @ 0.05" duration
0.551" / 0.547" int/exh lift
117 LSA

GMPP Hot Cam
218/227 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
112 LSA

GMPP ASA Cam
226/236 int/exh @ 0.05" duration
0.525" / 0.525" int/exh lift
110 LSA

6.0 LQ9
207/196 int/exh @ 0.05" duration
0.479" / 0.467" int/exh lift
116 LSA

5.3 LM7
190/191 int/exh @ 0.05" duration
0.466" / 0.457" int/exh lift
114 LSA

Of those choices the GMPP cam"s would probably be your best choices based on the tighter LSA. Gonna give you a little more bottom end than the others.

Toddy · Jun 18, 2009

JUst to be clear, what all do I need to swap the truck intake to the LS1 intake? FYI I need the injectors and fuel rails for the LS1 intake. The truck stuff wont work. Is thei s right?

Toddy

Juan_Hong_Loe · Jun 18, 2009

Check Cole's buggy build on page 16. you can see the idler pulley had to be moved and yes the car injectors have to be used.

1TONZR2 · Jun 18, 2009

that cam will prolly be more expensive as well...I got my cam/springs for 100 bux locally

Toddy · Jun 18, 2009

On the 02 and up LS6 cam do you have to change teh push rods to make up for the smaller cam journals? Read something that said the 02+ LS6 used a smaller journal cam or something like that.

Toddy

1TONZR2 · Jun 18, 2009

I used the stock 5.3 push rods

Toddy · Jun 19, 2009

The cam used in the '02-'04 LS6 had a smaller base circle so the valves were 0.6 mm longer to compensate for the difference. That means this cam can't be interchanged with any other cam unless all the matching components are used, too.

This is from Billvista's article on Pirate.

Toddy