Which headers
#1
Senior Member
EXPERT BUILDER
Thread Starter
Join Date: Sep 2003
Posts: 259
Which headers
This is my current combo and I need to buy new headers.This car also runs on Alky.What size tubes and would this benefit from step headers?
383 sbc,hooker super comp 1 3/4 #2131 headers,comp .558 550,260,266 at .050,108 on 104 icl,14-1,dart iron eagle 215 platinums ported,2.05 1.6 valves bowl blended and port matched to a 2925 super victory,alky 810 carb,power glide,4.56 gears,4800 convertor,3100 lb car.This is a 1/4 drag car.Here are the flow numbers:
383 sbc,hooker super comp 1 3/4 #2131 headers,comp .558 550,260,266 at .050,108 on 104 icl,14-1,dart iron eagle 215 platinums ported,2.05 1.6 valves bowl blended and port matched to a 2925 super victory,alky 810 carb,power glide,4.56 gears,4800 convertor,3100 lb car.This is a 1/4 drag car.Here are the flow numbers:
#2
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
I would suggest 1 7/8" Hooker super comps., they come with stahl adaptorplates (7 bolt conversion) that is what i have on my 377" on alcohol and i also ran them on the 406" before i broke a rod bolt. They work well and are inside the frame on my Malibu, but i did have to install turn outs to keep the fumes out of the car.
JMO
Zip.
JMO
Zip.
#3
Senior Member
SENIOR BUILDER
Join Date: Dec 2005
Posts: 117
Originally Posted by zipper06
I would suggest 1 7/8" Hooker super comps., they come with stahl adaptorplates (7 bolt conversion) that is what i have on my 377" on alcohol and i also ran them on the 406" before i broke a rod bolt. They work well and are inside the frame on my Malibu, but i did have to install turn outs to keep the fumes out of the car.
JMO
Zip.
JMO
Zip.
-for sure not over 2"
#4
Senior Member
EXPERT BUILDER
Thread Starter
Join Date: Sep 2003
Posts: 259
Here is why I'm asking.......The exhaust port on my head is .080 wider then the width on the header on all exhaust ports.My question do you think this is hurting performance?This car has run 10.14@131
#5
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Originally Posted by et7333
Here is why I'm asking.......The exhaust port on my head is .080 wider then the width on the header on all exhaust ports.My question do you think this is hurting performance?This car has run 10.14@131
JMO
Zip.
#6
That's a fact Jack ! Not only are you pushing through a physically smaller opening but you also add in the 'laminar' layer (although infinitesimal) and the opening gets even smaller. ANY 'edge' will be a larger restriction than it 'looks'. Blending with a shallow taper can reduce that significantly. as per a venturi.