headers or 4BBL? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pissonNOS · 04-11-2003, 12:31 AM

Which is going to give me more power? a good set of headers or an aluminum intake and 4 barrel? im thinking the 4 barrel but any suggestions are helpful
i need all I can get out of a 307!

Hooter · 04-11-2003, 12:36 AM

an aluminum intake and 4 barrel will make more of a significant differnce

Chevy Wrench · 04-11-2003, 01:10 AM

Go with the intake and carb. Headers are more for higher engine speeds. A good dual plane manifold with the right carb will give you more low end power from off idle to, lets say 5000 rpm. But it all depends on what manifold you choose. I say let your right foot and your pocket book be the judge.

bigjimzlll · 04-11-2003, 09:25 AM

Hi...If you think of your engine as an air pump(over simplification)..the more air in and OUT the more power. You will notice an improvement with a 4 barrel and intake, but you will see a much bigger improvement with headers too..now if you add a cam..which helps the engine take advantage of the other improvements..you will see the most gain. lets say 10HP for carb and intake..10HP for headers..and 15 HP for a cam...but if you install all 3..you could easily see 50HP gain..all of the parts must work together
Jim

Longhorn Man · 04-11-2003, 09:48 AM

And the cool thing bout heades and intakes, they will bolt onto your next (hopefully bigger) small block too.

lukecp · 04-11-2003, 10:22 AM

If you already have a 4bbl, get the headers. If you have a 2bbl, the 4bbl will make a HUGE difference. I installed headers on my 350, but i really couldn't make a judgement on the full throttle performance before and after because the engine wasn't broke in yet (i babied it until it got to 500 miles). The headers made it sound 10x as good though.

Blue68 · 04-11-2003, 11:55 AM

If you don't have a dual exhaust, do that first and then do the intake and carb. This was what I did with my 307 and it made a huge difference. With the single exhaust and 2bl leaking carb and iron intake, it was pretty weak.

pissonNOS · 04-11-2003, 02:18 PM

ya were gonna put a performance aluminum intake and a 4bbl mayeb a mild cam not sure yet and yes i do have dual exhaust

04-11-2003, 12:31 AM	#1
pissonNOS senior member Join Date: Feb 2003 Location: fort macleod alberta Posts: 2,770	headers or 4BBL? Which is going to give me more power? a good set of headers or an aluminum intake and 4 barrel? im thinking the 4 barrel but any suggestions are helpful i need all I can get out of a 307! __________________ 69 GMC bagged

04-11-2003, 12:36 AM	#2
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	an aluminum intake and 4 barrel will make more of a significant differnce __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

04-11-2003, 01:10 AM	#3
Chevy Wrench former desert rat Join Date: Feb 2003 Location: salt lake city, utah Home of the 3 M's Mormons, methlabs and minivans Posts: 320	Go with the intake and carb. Headers are more for higher engine speeds. A good dual plane manifold with the right carb will give you more low end power from off idle to, lets say 5000 rpm. But it all depends on what manifold you choose. I say let your right foot and your pocket book be the judge. __________________ 94 Chevy Silverado Ext cab 4/6 drop w/ 18's and 2500watt system (work truck). 67 Chevy swb under const. frame off custom, 20's, bagged and a large rat under the hood,and a 1940 Chevy truck under const.

04-11-2003, 09:25 AM	#4
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	Hi...If you think of your engine as an air pump(over simplification)..the more air in and OUT the more power. You will notice an improvement with a 4 barrel and intake, but you will see a much bigger improvement with headers too..now if you add a cam..which helps the engine take advantage of the other improvements..you will see the most gain. lets say 10HP for carb and intake..10HP for headers..and 15 HP for a cam...but if you install all 3..you could easily see 50HP gain..all of the parts must work together Jim __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

04-11-2003, 10:22 AM	#6
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	If you already have a 4bbl, get the headers. If you have a 2bbl, the 4bbl will make a HUGE difference. I installed headers on my 350, but i really couldn't make a judgement on the full throttle performance before and after because the engine wasn't broke in yet (i babied it until it got to 500 miles). The headers made it sound 10x as good though. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

04-11-2003, 09:48 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	And the cool thing bout heades and intakes, they will bolt onto your next (hopefully bigger) small block too.

04-11-2003, 11:55 AM	#7
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	If you don't have a dual exhaust, do that first and then do the intake and carb. This was what I did with my 307 and it made a huge difference. With the single exhaust and 2bl leaking carb and iron intake, it was pretty weak. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

04-11-2003, 02:18 PM	#8
pissonNOS senior member Join Date: Feb 2003 Location: fort macleod alberta Posts: 2,770	ya were gonna put a performance aluminum intake and a 4bbl mayeb a mild cam not sure yet and yes i do have dual exhaust __________________ 69 GMC bagged



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