Headers for a 2002 silverado 5.3 liter any suggestions?
05-26-2007, 12:12 PM
#14
5 year bitches!
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Originally Posted by 99Silver6.0
N/A 5.3's dont need 1 3/4 primaries or 3" collectors to make power.
and i would like a good explantion from you with your theory on the 1 3/4 primaries if you dont mind
05-26-2007, 01:56 PM
#15
Originally Posted by Quik
thats a given with the 3". hell dyantechs only have 2.25 collectors
and i would like a good explantion from you with your theory on the 1 3/4 primaries if you dont mind
and i would like a good explantion from you with your theory on the 1 3/4 primaries if you dont mind
Dynas collector is 2.5...
Last edited by 99Silver6.0; 05-26-2007 at 02:01 PM.
05-26-2007, 03:25 PM
#17
it all depends on where you want your peak torque to occur, typically every 1/8" increase in diameter will raise peak torque 500rpm.
on a 325-ish CID motor in a heavy-ish vehicle that's driven daily you'll want peak TQ sooner in the rpm band.
very quickly, 1 5/8 will see peak TQ around 4100rpm, 1 3/4 will see peak TQ around 4600rpm on a 5.3L.
without the benefit of FI, a NA motor will do better with a conservatively sized primary
on a 325-ish CID motor in a heavy-ish vehicle that's driven daily you'll want peak TQ sooner in the rpm band.
very quickly, 1 5/8 will see peak TQ around 4100rpm, 1 3/4 will see peak TQ around 4600rpm on a 5.3L.
without the benefit of FI, a NA motor will do better with a conservatively sized primary
05-26-2007, 06:22 PM
#19
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Originally Posted by 99Silver6.0
Why is a 1 3/4 primary necessary on an N/A 5.3? 1 5/8 is a better primary size for a 5.3 that doesnt have big cam or a blower.
Dynas collector is 2.5...
Dynas collector is 2.5...