LQ4 into a 3rd Gen/1972 Nova by frojoe

3 minute(s) of a 891 minute read

Hah! You got me, Jimbo.. guilty as charged. And this isn't going to help..

Not a real update, I guess, but finally spent some time cleaning up the 3D model I downloaded, and started making it look more realistic. Considering it's dark and rainy out right now and my car is nowhere near the garage to wrench in, this is the closest to "car work" that I'm gonna get for the next while.. but it's kindof awesome too..

Started adding surface colors and hiding all the surfaces I don't need. About ready to model the wheels and then start toying with air dam designs.

7-31-2017

Does anyone have a suggestion for finding 321 stainless schedule 10 or 40 weld elbows?

I've tried (without success):

- Ace Race Parts
- McMaster-Carr
- Treadstone
- Vibrant
- Burns Stainless
- Columbia Mandrel Bends
- BMC Racing Products
- CX Racing
- eBay

Everything I've found is 304/304L, or sometimes 316. Since I'm looking for thicker wall (0.157-0.203"), maybe the lower heat capacity (and thus more prone to cracking) 304 would be fine for exhaust-type area...

8-1-2017

Thanks Clint. What's going on here is theorizing a thicker-wall hotside piping for a twins setup. I could in theory make everything out of fairly easily available 16ga ss321 tube (albeit expensive), but I would like to keep the wall thickness up there, at the minimum 0.100" for strength after welding and heat cycles. Which has lead me to Schedule 40 2.5" nominal weld elbows with a 2.469" ID, which would maintain ~constant exhaust velocity from the CTS-V manifold flange to a T3 turbo flange.. it's proving difficult to find SS321 2.5" elbows, however SS304 elbows are abundant and cheaper in 2.5" size. I could easily find SS321 2.0" elbows at either 2.245" ID (0.065" wall) or 2.157" ID (0.120" wall). The length of the welded piping brom manifold to turbo flange at whatever ID I choose should be under 12" total, hopefully under 10", so maybe a reduced ID wouldn't be bad for exhaust velocity vs restriction.  

I read a thread on here discussing hotside "crossover pipe" sizing (however the theory is still valid for a twin turbo setup) that says 2.25" piping (so assuming 2.125" ID if 16ga used) is good to well over 1000hp without restriction, and keeps exhaust velocity up.