5.3 cam ?
03-09-2009, 01:43 PM
#1
Teching In
Thread Starter
Join Date: Feb 2009
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
5.3 cam ? I'm in the process removing a 4.3 L and buying a 04 5.3L out of a van to put into my rock crawler i have been told all i have to do is put a cam in it and that 5.3 will wake up .. so the ? i have is what cam should i be looking at . i really don't want to change springs valves push rods if i don't have to , can any 1 help out
thanks for the help
thanks for the help
03-09-2009, 02:06 PM
#3
You will need to change valve springs and pushrods with any cam you choose. The stock pushrods are very weak and will flex or bend under the load of a stouter spring than stock.
For a rock crawler, you want fairly low overlap so you can have crisp manners off-idle. You also want a fairly early intake valve closing point to keep your low and mid-range torque robust. Also, when comparing to 5.7L cams, make your 5.3L cams around 4 degrees smaller.
For a rock crawler, you want fairly low overlap so you can have crisp manners off-idle. You also want a fairly early intake valve closing point to keep your low and mid-range torque robust. Also, when comparing to 5.7L cams, make your 5.3L cams around 4 degrees smaller.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
03-09-2009, 02:23 PM
#5
Teching In
Thread Starter
Join Date: Feb 2009
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
You will need to change valve springs and pushrods with any cam you choose. The stock pushrods are very weak and will flex or bend under the load of a stouter spring than stock.
For a rock crawler, you want fairly low overlap so you can have crisp manners off-idle. You also want a fairly early intake valve closing point to keep your low and mid-range torque robust. Also, when comparing to 5.7L cams, make your 5.3L cams around 4 degrees smaller.
For a rock crawler, you want fairly low overlap so you can have crisp manners off-idle. You also want a fairly early intake valve closing point to keep your low and mid-range torque robust. Also, when comparing to 5.7L cams, make your 5.3L cams around 4 degrees smaller.
03-09-2009, 02:34 PM
#6
It is absolutely not the best cam for a 5.3L...especially in this rock-crawler application. The intake valve closing point is entirely too late for strong low and mid-range torque. LS6 cams are very soft in their low-end torque in 5.3s.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
