So I'm stuck in some work meetings in Israel this week and my mind is wandering a little bit in between arguing with my coworkers about our product roadmap.
I'm daydreaming about my tbirds roadmap -- specifically 180 degree headers.
How 180-Degree Headers Help a V8?s Low- and Midrange Torque - Hot Rod Network
Heres' my thinking of how the 180 degree headers would look/fit on the tbird and still remain removable.
180 Degree Headers on a 409 | 348-409.com Info Exchange Forum
My engine is pretty mild: 302 bored 20 over, GT40 heads, GT40 intake, e303 cam, stock injectors, slight tweak with timing at high end with QH tune.
My current exhaust consists of stock headers (wrapped b/c of heat soak concern), 2.5" catless downpipes into a Y pipe, and 3" single pipe all the way back (through a cherry bomb and Flowmaster 40 before turning 90 degrees and coming out my trunk Pagani Zonda style. THe exhaust is very modular and uses bolt together flanges. If I design it right, I can replace the manifolts and downpipes w/ the Y and retain the back half of my exhaust system as is.
We shift at 5500RPM.
Maybe an honest 250HP at best.
1) I don't really need more powah.
2) I don't really need to lower my car's ground clearance and I'll need to check this when i get home.
What I DO WANT is an interesting project for the next few months. I'm planning to do an arrive & drive in 2019 so I really do have 2 years to get my tbird together again.
And trying to find a way to getha that glorious bwwwaaaaaaaa sound is what I want.
My car already makes fritos, so I cannot damage it any further
Q: What is the optimal diameter for the primary tubes for my application?
How Header Primary-Tube Diameter Affects Performance - Hot Rod Network
- Looking at this chart, my ideal diameter for the primaries looks to be 1.5"
- However, looking at what tubing and header flanges are available, my options seem to be 1.625" or 1.75"
I suspect Josh @ Mandrel Exhaust Systems can cut me a deal on pipes as a repeat customer but I want to confirm what I should buy first.
Q: Also, if I start with a bunch of u-bends, do I want a 2" or 2.5" turn radius (seems to be more common)?
I'm guessing tighter if I can get them for the same price but any thoughts you guys might have would be interesting.
Q: Finally, do I need SS headers? I don't think so because a) this is not a daily driven car and I'll probably wrap the downpipes anyway. If the off-the-shelf Summit kits spec in aluminized steel, I should be good with that.
Q: Will this setup give me the exhaust sound I'm looking for? Since I'm planning a fairly long path from one bank to the other (through a crossover) and my exhaust already merges into one pipe after the downpipes (call it 3' farther down or maybe 1-2' after the collectors, will the pulses line up close enough to give me the flat plan crank/180degree/dual 4cyl sound?
Yeah, I know this is a long project. yeah, I so alknow it's pretty stupid. But what else do I have left to mess with on this tbird? I suppose I could fab in a giant fuel cell but that seems too practical a project