914 GT 3.6 Ferrari Build, - Mechanicals coming along, electronics soon! Options

[Chris914n6]

Going to be interesting with no cross tube.

I'd do a partial valance, just the corners. Stockish sides and around to hide the tires. Leave the mufflers and trans showing.

[tygaboy]

While I appreciate the input, it's a classic case of "it's not as simple as you may think".
Pictures don't convey all the challenges and with what I've posted, some of the design challenges aren't obvious:
1. there are space limitations that mean I really need to keep the exhaust outside of the rear trans mount support strut. Inside means its too close to the CV (heat).
2. the tube radii take up some distance so there's less distance available for the straight sections than you may think.
3. I want a design that allows for the both the lower shock bolt and the axles to be removed with the exhaust in place. This impacts tube location.
4. the V-band location helps with #3. Further forward sort of eliminates the issue as I wouldn't mind if I had to remove the muffler section for servicing the shock/axle. Not ideal but...
5. I want the system to slope up as it heads back because the V-band has a larger diameter than the tubing so I need to watch its location re: ground clearance.
6. it can't slope up too quickly because it has to clear the support strut.
7. I want to like how it looks.

I suppose I could take a swing at making a support strut that has a pass-through for the exhaust. (IMG:style_emoticons/default/shades.gif)

For now I'll close with: Anyone who'd like is welcome to come to The Red Barn and help a brother out. (IMG:style_emoticons/default/poke.gif)

[tygaboy]

Going to be interesting with no cross tube.

I'd do a partial valance, just the corners. Stockish sides and around to hide the tires. Leave the mufflers and trans showing.

@Chris914n6 - As I understand it, flat plane cranks produces more efficient exhaust scavenging without the need to have header primaries cross over from one bank to the other. Plus, the 360 Challenge cars run no post-header cross-over tube. Sure, race car so not as concerned with lower RPM stuff but I'm not after the last lb/ft or hp.
I talked with a buddy who builds and campaigns a number of successful race cars and owns both a 360 street car and a Challenge. He recommended no cross-over.
I'm no expert but all that, plus the easier packaging, is good enough for me. At least until I prove otherwise.

[JmuRiz]

If it sounds anything like a Challenge car on track, it gets a thumbs up from me (IMG:style_emoticons/default/biggrin.gif)

Version 2 with the slight angle up could leave some room for a working diffuser, hmmmmm

[Chris914n6]

Going to be interesting with no cross tube.

I'd do a partial valance, just the corners. Stockish sides and around to hide the tires. Leave the mufflers and trans showing.

@Chris914n6 - As I understand it, flat plane cranks produces more efficient exhaust scavenging without the need to have header primaries cross over from one bank to the other. Plus, the 360 Challenge cars run no post-header cross-over tube. Sure, race car so not as concerned with lower RPM stuff but I'm not after the last lb/ft or hp.
I talked with a buddy who builds and campaigns a number of successful race cars and owns both a 360 street car and a Challenge. He recommended no cross-over.
I'm no expert but all that, plus the easier packaging, is good enough for me. At least until I prove otherwise.

I was thinking that you essentially have 2 4 cylinder engines with that setup...
maybe it works, maybe it's ricey?

[tygaboy]

Everyone can relax! Here's the going-forward design. I REALLY wanted the tube to be parallel to the trans mount frame so I put on my big boy pants and worked it out.
The tube at the header is a bend with a 1.46" extension added to make up for the cylinder offset and allow for symmetry from that point back. It turned out nicely and that's the actual part that'll be used.
The piece at the other end is a mock up piece I did just to prove out the fit. That end will be fabbed next.
I'll need to adjust the exhaust tip fixture to get the mufflers dead straight in the car but it's close enough for me to know I'm going with this layout.

[bkrantz]

Nice!

(and thanks)

[pfreiburger]

That looks just right! Thanks so much for taking us along during the creative process. It is great to watch you work through ideas and versions – and end up in just the right place.

Funny thing, I generally don’t have much interest in 914 non-Porsche engine swaps – but this one I love!

The kitties are cool too.

[tygaboy]

Like this.

[bkrantz]

Thinking about heat shielding (or exhaust wrap)?

[East coaster]

Looks good, I like where you ended up.

[tygaboy]

And for any interested parties, here's video of the exhaust evolution.

https://www.youtube.com/watch?v=qQ9FcldXOz4

[Cairo94507]

It never ceases to amaze me the work that goes into making it look right. I love the final exhaust look. Looking forward to seeing it all welded up and the spring clamp connection. (IMG:style_emoticons/default/beerchug.gif)

[technicalninja]

I'd love to see a video of "Mortis" with your monsters meeting the other cats.

That looks like a place I would spend too much time in!

[tygaboy]

The "double slip" connectors have arrived. Vibrant Performance pieces. REALLY nicely constructed.

[tygaboy]

And here's what they look like ready for final welding.

[tygaboy]

Both fit.

[tygaboy]

I'm really happy with how this is turning out. Now squint and imagine it with all the finishes refreshed, etc. (IMG:style_emoticons/default/drooley.gif)
Can't hardly wait.

[KELTY360]

It’s all coming together like the factory couldn’t have imagined. A work of art and pristine mechanical excellence.

[bkrantz]

The "double slip" connectors have arrived. Vibrant Performance pieces. REALLY nicely constructed.

Will you clamp these or just rely on slip-fit?