Yes, another cam thread - read all the others ...
Sep 7, 2005 | 07:44 PM
#1
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Yes, another cam thread - read all the others ...
Current mods:
5.3L in a 2005 Avalanche. Current mods include Dynatech headers, Flowmaster exhaust, and K&N filter with a modified airbox + Airaid intake tube
Goal:
Maintain good drivability (it is a daily driver), slightly choppy idle is ok, but I want more grunt particularly down low; Something on the top end is good too, but this thing is a 'turd' to get going (I am sure the heavy *** 20's with the 3.42's don't help)
I might go with a Radix in the future, but for now I want to stay NA. Although after riding in 2 FI trucks (one Radix and one Whipple), I am sure I will end up going that route, but one step at a time.
I have read all the existing cam threads, and I have seen some nice gains. What I have found discouraging is some info in Will Handzel's book. On a 5.3L with stock heads, the LS6 cam (doesn't say which one) lost 7-21 TQ below 3,500RPM and 5-9HP for the same range. I realize the LS6 cam is not ideal for the engine.
Is there a cam that kicks *** down low? I might upgrade the stall, and do 3.73's to help. However, the stall will remain low. I am willing to go with some ported heads and slightly increase compression as well which should help. Based on other LS1/6 cars, I assume at 10:1 I could still run an supercharger in the future with no problems.
The cam that comes to mind is something like the Vinci "Ultra Torque": 210/218 .551/.551 116. Anybody running this yet?
5.3L in a 2005 Avalanche. Current mods include Dynatech headers, Flowmaster exhaust, and K&N filter with a modified airbox + Airaid intake tube
Goal:
Maintain good drivability (it is a daily driver), slightly choppy idle is ok, but I want more grunt particularly down low; Something on the top end is good too, but this thing is a 'turd' to get going (I am sure the heavy *** 20's with the 3.42's don't help)
I might go with a Radix in the future, but for now I want to stay NA. Although after riding in 2 FI trucks (one Radix and one Whipple), I am sure I will end up going that route, but one step at a time.
I have read all the existing cam threads, and I have seen some nice gains. What I have found discouraging is some info in Will Handzel's book. On a 5.3L with stock heads, the LS6 cam (doesn't say which one) lost 7-21 TQ below 3,500RPM and 5-9HP for the same range. I realize the LS6 cam is not ideal for the engine.
Is there a cam that kicks *** down low? I might upgrade the stall, and do 3.73's to help. However, the stall will remain low. I am willing to go with some ported heads and slightly increase compression as well which should help. Based on other LS1/6 cars, I assume at 10:1 I could still run an supercharger in the future with no problems.
The cam that comes to mind is something like the Vinci "Ultra Torque": 210/218 .551/.551 116. Anybody running this yet?
Sep 7, 2005 | 08:49 PM
#2
https://www.performancetrucks.net/fo...=vinci+210+218
he seems pleased
not sure how it would do in a NA application
while youre waiting for FI
he seems pleased
not sure how it would do in a NA application
while youre waiting for FI
Sep 7, 2005 | 10:47 PM
#5
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Teching In
Joined: May 2005
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Anybody have flow #'s for stock 5.3L heads? I am assuming the .551 lift for that cam is with the 1.7 rockers. So the 1.8's would make it .583". Just curious if that is too much. I did see the CHP magazine using a 210/218 cam, but I wasn't for sure if it was on a 116 (Ultra Torque) or a 112 (ASP-Kicker). Besides, the gains in the magazine over just the rockers were not that significant, but that may be due to the 5.3's not flowing too well about .550?
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