1 & 7/8ths Headers
#1
Staging Lane
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Location: Bergen County NJ
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1 & 7/8ths Headers
Truck has only a 5.3 but lots of flow potential. TBSS intake with 87 mm throttle body, Trick Flow GenX 205 Heads and a 226/236 cam. 3,200 rpm stall and 4.88 gears with a 33 inch tire.
Thing is I sold some rusty headers I had and currently have the stock manifolds back on. Getting the Speed Engineering true dual 3 inch when it comes out, and I'm considering their 1&7/8 headers. Getting the truck dyno tuned again after the new exhaust get's installed.
Question is, am I shooting myself in the foot somehow getting the 1&7/8 headers vs the 1&3/4 headers?
Thing is I sold some rusty headers I had and currently have the stock manifolds back on. Getting the Speed Engineering true dual 3 inch when it comes out, and I'm considering their 1&7/8 headers. Getting the truck dyno tuned again after the new exhaust get's installed.
Question is, am I shooting myself in the foot somehow getting the 1&7/8 headers vs the 1&3/4 headers?
#2
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iTrader: (19)
Only way to truely tell is to get it on the dyno. 1 7/8 with. Dual 3" sounds like overkill to me on a 5.3, but thats just an opinion...ive never had the combo back to back on a dyno.
I say go for 1 7/8 dual because if it does hurt, it wont be a crazy number but will give room to grow if you ever step up to a 5.7+ CI combo.
I say go for 1 7/8 dual because if it does hurt, it wont be a crazy number but will give room to grow if you ever step up to a 5.7+ CI combo.
#3
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That's what I figured. Some people rant and rave against big pipes but no one has a clear cut answer. Also most don't retune and just go by "butt-dyno." It'll be neat to see cause my tuner still has my old graph of 1&3/4, 3 inch Y-Pipe to muffler to dual 2.5. When Speed Engineering releases their kit I'll post and overlay of what happens after the tune.
#4
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iTrader: (7)
Small(er) motors and big headers add up to one thing = it hurts scavenging.
Scavenging is needed at low rpms to help with hp/tq production. Once you go boosted, things change a little.
If this were a 6.2 motor, then sure, 1 7/8 would be the way to go. For a 5.3, I think you'll hurt your low end.
Scavenging is needed at low rpms to help with hp/tq production. Once you go boosted, things change a little.
If this were a 6.2 motor, then sure, 1 7/8 would be the way to go. For a 5.3, I think you'll hurt your low end.
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