Exhaust Swap from V8 to a V6
 

I have an opportunity to pick up the rear section of the exhaust system on a wrecked V8 that I found locally for a decent price. By no means am I pretending to be a "V8" but I always just preferred the balanced look of the quad exhaust tips on the V8 over the V6 straight center exhaust.

Looking at the parts diagrams and layouts of the rear exhaust portion of the V6 and V8, it appears that its a straight bolt on affair. The rear is secured by using exhaust clamps and the exhaust hangers seem to be all in the same spots. The only thing I would need to complete this is the rear lower valance on the bumper. I don't expect the sound to change much as the muffler itself is very similar in design to the V6.


https://cimg3.ibsrv.net/gimg/www.jag...36b5ed7fc7.jpg


https://cimg4.ibsrv.net/gimg/www.jag...a13dc1db5a.jpg

Can't help from a technical pov, but I think you should go for it.
Quad exhaust looks much better than dual.

I believe these will swap without a problem. I've been curious about this myself.
If you do so, I would interested in your stock setup for measurements if you decide to sell or would like to rent to aid in development.

Regards,
Derek Fricke

Huh - I love the tapered pipes on the V6, but each to his own. Interesting experiment nonetheless.

Pays homage to the E-Type...love my twin tips but am interested in your experiment.

It looks like there is a center path for the exhaust tips on the V6 that would be left exposed. Would you be replacing more than just the exhaust itself?

Ditto, I also find the V6 center twin pipes much more aesthetically pleasing. The rear valence design is also much cleaner and nicer.

Correct. I would have to source the lower valance from a V8 car.

Throw me a price. But I'm in California so shipping would be a bit pricey.

I like the center exhaust, a little different. but go for it, interested in seeing how it goes. If you are really bold...keep the center exhaust and also go dual sides :-)

Curious, where did you find those pictures?

It appears the only significant modification needed for this swap would be rerouting the vacuum tubing for the valves, but that should be fairly simple.

Diagrams and parts breakdowns are pretty accessible online.

It's even easier since I don't have the active exhaust. I just need to shimmy the valves to stay open before installing.

If you look at the V8 and V6 from "low down and behind" you will see a metal support beam that goes between the two rear wheels and under the exaust tubes before they enter the rear exaust system.

On the V6 that beam is symetric and "horizontal flat".

On the V8 that beam is not horizontal. It is not "horizontal flat" and is lower on the left side than the right. It looks like this is done to give room for the exaust on the left side.

That support beam is not shown in the pics above, but I would guess it goes aproximately where it is marked by a "x2" in a black arrow.

I do not know if that could cause any problems, but I would check that out first.

I don.t think you even need to do that. The valves are normally open. That's why the exhaust is full open on startup for the active exhaust systems before the vacuum builds up.

I've thought about that but it really depends what position the valves were in when the donor car was totalled.

So...6 exhaust tips? :icon_teeth:

Funny story: I burnt myself the same way trip days ago.

I think the valves are spring loaded in the normally open position. That's why the valves are open on startup before the vacuum builds up to shut them down. (At least, that's what happens in my deluded universe).

Another member posted some awesome technical docs, of which this is one. I grabbed copies of them.
https://www.dropbox.com/s/szc3vze5ol...haust.pdf?dl=0


Here's an excerpt...