Unless you're moving a lot of air through the motor(monster cam with aftermarket intake/heads and spinning to 7k+, or a good sized shot of nitrous) the 1-3/4" should take care of your needs. And you don't want any back pressure, you want velocity. Don't confuse the two.
Last edited by Duct_tape123; 05-23-2012 at 02:30 PM.
cjriojas:if you're weather man is a 5 gallon bucket, YOUUUUUUUUUUU might be a redneck
danger_ranger83: I see now why it cost so much to get a harness made... FML
2boostedSilverado: I like Casey's rear end, I want to chat with him about it
Ive got the 1 7/8 on my fairly stock truck and they are great
2006 CCSB 5.3 Calspeed LT, CAI, Nelson tuned, 3'' exhaust
Pulled this out of my archived sites. May have been posted before, but its a good read.
http://www.superchevy.com/technical/...h/viewall.html
Mainly this explanation.
http://www.superchevy.com/technical/.../photo_04.html
Remember, most headers are measured as O.D. so you have to subtract the thickness of the tubing to get the I.D.
1-3/4" pacesetters are 16 gauge( ~.0598) so 1.75-.1196=1.6304"
Stock 5.3/4.8 heads flow roughly 160 CFM at .500, and around 175 CFM at .600
So the 1-3/4" pacesetter headers are pretty dang close for a stock headed motor.
Last edited by Duct_tape123; 05-23-2012 at 12:21 AM.
cjriojas:if you're weather man is a 5 gallon bucket, YOUUUUUUUUUUU might be a redneck
danger_ranger83: I see now why it cost so much to get a harness made... FML
2boostedSilverado: I like Casey's rear end, I want to chat with him about it
Thanks for those links Duct_tape123.
That was some great info. I think I'm gonna go ahead and go with the 1 3/4"...
Has anybody had any fitment issues with Calspeed's LTs?
yea but nothing I couldn't fix with a torch and a hammer...
- 5.3 Stock Internals - Cal Speed Stainless LT's - 18" Magnaflow - K&N Drop In - Airaid Intake Tube - Nelson Tune -
Shopping List
- Cam - 3200 Circle D Stall - 10" King Coilover Shocks - 16" King Reservoir Shocks - FG front Fenders - 17" Methods -
Thats comforting lol
You can check mine out of your ever in Yukon. My truck is the nbs so its a lil diffOriginally Posted by Rmitch223
2006 CCSB 5.3 Calspeed LT, CAI, Nelson tuned, 3'' exhaust
YES! Not every one takes the time to research such an overlooked performance upgrade.
2002 ECSB 2WD 5.3
1995 Formula Firebird 383 LT1
1984 Camaro 408 SBC
Most sports require one ball, motocross requires two.
Racing isn't a matter of life and death, it's much more important than that.
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