417 w/ PRC "small bore LS7" 265's... Which header?
417 w/ PRC "small bore LS7" 265's... Which header? So I'm in the process of putting together a 417, it's gonna be 11.7:1 with the PRC small bore LS7's. Martin had Kip grind me a 243/259 .667"/.645" 113.5+4, with Lunati/Morel 72532's spinning it to 7,2-7,500. I currently have TSP 1 3/4"x3" long tubes with really long primaries. I also have the option of running a Kooks 1 7/8"x3" setup, obviously those have considerably shorter primaries.
What's my best option here?
What's my best option here?
Last edited by FRiCK; Jun 21, 2015 at 03:28 PM.
TECH Fanatic
Joined: Aug 2009
Posts: 1,841
Likes: 252
From: Coast of San Mateo County Between Pacifica & HMB
Big Heads, Big Cam, Big Headers! Seems no-brainer to me, at 600,
Certainly 650+ FWHP 1 3/4" starts to choke down exhaust without
Step. I imagine your shooting for 700+ with those heads and cam.
My .02
Certainly 650+ FWHP 1 3/4" starts to choke down exhaust without
Step. I imagine your shooting for 700+ with those heads and cam.
My .02
Last edited by NAVYBLUE210; Jun 21, 2015 at 07:51 PM.
Launching!
Joined: Jan 2008
Posts: 225
Likes: 1
From: Fargo, ND
before everyone chimes in and says you need 2.5" primarys and 4" collectors and ridiculous things like that, read this blog
http://www.exhausting101.com/?p=37
This guy has made more cars win races with proper header and exhaust design than times you have had sex in your life (okay maybe thats exaggerating, but its a lot)
http://www.exhausting101.com/?p=37
This guy has made more cars win races with proper header and exhaust design than times you have had sex in your life (okay maybe thats exaggerating, but its a lot)
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TECH Junkie
Joined: Dec 2005
Posts: 3,092
Likes: 11
before everyone chimes in and says you need 2.5" primarys and 4" collectors and ridiculous things like that, read this blog
http://www.exhausting101.com/?p=37
This guy has made more cars win races with proper header and exhaust design than times you have had sex in your life (okay maybe thats exaggerating, but its a lot)
http://www.exhausting101.com/?p=37
This guy has made more cars win races with proper header and exhaust design than times you have had sex in your life (okay maybe thats exaggerating, but its a lot)
That is the inside diameter of the 1 3/4" header. That is the size my headers start out at to match the exhaust port as close as I can and be a continuation of it. Then it steps up to 1 7/8".
