I was reading all about the exaust sound questions, and I was goint to post this question under it... but I want this to be seen.. so I started a new topic.
OK, I understand that on a race car when noise is not a issue they run (many do) open headers.
But in the thread about getting THAT sound, a few mention back pressure for a street rod. WHY??
Is this just to control the sound levels?
I am finishing up my build. A `63 Noavss 400 SB with a few go fast godies. A pair of hooker super comp headers and I am looking to get a mandrel bent exhaust with either a X of H pipe dumping under the car just before the rear axel or turn outs just before the rear tire.
I was looking at Borla mufflers as no one around me has em.
Everyone runs FLOWMASTER or DYNOMAX sysytems.
Now as far as I know the BORLAS are a single straight threw free flow designe.. so what of BACK PRESSURE??
Do I really need to wory about this on a 11:1 compression car?
(no cats are needed,, and I am not looking to add em.)
Any help with this would be great.. cause I am right now in the mind set to run free flows. Boys in blue are pretty slack around my parts unless you start running hard on the street.
OK, I understand that on a race car when noise is not a issue they run (many do) open headers.
But in the thread about getting THAT sound, a few mention back pressure for a street rod. WHY??
Is this just to control the sound levels?
I am finishing up my build. A `63 Noavss 400 SB with a few go fast godies. A pair of hooker super comp headers and I am looking to get a mandrel bent exhaust with either a X of H pipe dumping under the car just before the rear axel or turn outs just before the rear tire.
I was looking at Borla mufflers as no one around me has em.
Everyone runs FLOWMASTER or DYNOMAX sysytems.
Now as far as I know the BORLAS are a single straight threw free flow designe.. so what of BACK PRESSURE??
Do I really need to wory about this on a 11:1 compression car?
(no cats are needed,, and I am not looking to add em.)
Any help with this would be great.. cause I am right now in the mind set to run free flows. Boys in blue are pretty slack around my parts unless you start running hard on the street.