Header size for 430 inch sbc
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Header size for 430 inch sbc
Im in the process of going back together with this 4.200 by 3.875 11 to one street sbc. It has 1.750 3 inch headers on it now with 3 inch exhaust all the way out the back. Its a 69 vette so the mufflers have to basically be where they are and 3 inch is about as big as i can go. My question is with the exhaust would it be worth going 1.875 by 3.5 headers? My guess is it would help a little over about 5500 rpm and probably not be worth it for a street car. It should make about 600 hp
Re: Header size for 430 inch sbc
In my opinion, for torque, 1-3/4" into 3" is probably decent. For horsepower, the 1-7/8" into 3-1/2" will make more for sure!
What vehicle is that engine in?
What vehicle is that engine in?
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Re: Header size for 430 inch sbc
I think your finishing thought in your original post answered your own question quite nicely.
As a suggestion based on your transmission type, put the dollars into a nice set of 4:11 rear end gears instead of headers and in street driving you will see more performance in the "butt" dyno and be much happier!
As a suggestion based on your transmission type, put the dollars into a nice set of 4:11 rear end gears instead of headers and in street driving you will see more performance in the "butt" dyno and be much happier!
The Older I Get, The Dumber I Get
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Re: Header size for 430 inch sbc
Someone with pipe max. What are the ideal exhaust dimensions for this thing?
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Re: Header size for 430 inch sbc
Put mufflers on and throw all else out the window unless you have 1.250" headers.
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Adam
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Re: Header size for 430 inch sbc
Buy the program like we did.. Larry spent way too much time for someone to borrow it.gnicholson wrote: ↑Tue Feb 13, 2018 3:22 pm Someone with pipe max. What are the ideal exhaust dimensions for this thing?
GURU is only a name.
Adam
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Re: Header size for 430 inch sbc
And you have not even got close on the amount of info Pipe Max needs to calculate your set up.
GURU is only a name.
Adam
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Re: Header size for 430 inch sbc
Fair enough. I dont know have the program so i dont know exactly what info is needed. I can guess. I have seen other people ask the same question on here . I was just curious what dimentions would be optimal. Ive spent money on here i just havent bought that program yet but i will and ive had it on my mind for awhile to purchase
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Re: Header size for 430 inch sbc
Big headers are overrated for performance and a big PITA to install and work around. I'd keep what you have.
Joe Facciano