Porsche 911 / 997 exhaust on a Delorean?

[ALEXAKOS]

Ever been done? Any results on that?
One thing I hate on the rear look of a D are those round muffler tips on such a lovely square car. And one thing I loved on my 1971 Stingray, was the square tips it had right under its "L" shaped rear bumpers.

But aside aesthetics, replacing muffler tips are an easy task. I am looking to get me the Porsche exhaust set and attach it to my D manifold. The rear engined Porsche's have their manifolds exit under the boxer engine. A stainless adapter to reach the D manifold should not be a problem.
I am looking for better sound and horsepower increase.
What other technical difficulties do you see in such a replacement?

Attaching image of the Porsche exhaust:
18364


Delorean mockup with square mufflers
18365

[Kenny_Z]

I think you'd be better off getting a set of DeLorean headers instead of trying to use the stock manifold. There's no way come from the Delorean manifold around to the Porsche exhaust without some severely restrictive bends and even then I'm not sure there's a space to do it. I know there was something homemade that came through the suspension on either side of the engine cradle. I can't say I was a fan of it.

I say ditch the stock manifolds, get some headers, and then built an intermediary pipe to go from the headers to the Porsche exhaust. It'd be the fastest, easiest, and best looking route.

[Silverbullet]

Well, I have a 1972 Corvette, and as you know, they were not really rectangle, it was just a clamp on box to the round pipe. You could do that to the Stage 1 Exhaust, with Stainless Steel Headders, Cats and round pipes. I put the Stage 1 on mine, and It SOUNDS great, and I am sure there is as good of HP gain as you would get with the Porsche. Also I REALLY like the DMC etched into the top of the nice short, angled chrome exhaust pipes.

Craig

[Starglider]

Well, I have a 1972 Corvette, and as you know, they were not really rectangle, it was just a clamp on box to the round pipe.

Were there any 80s cars with genuine square / polyagonal exhausts? I don't remember seeing those until the mid 90s.

[ALEXAKOS]

Points take thanx guys!
Thing is, that a stage I exhaust goes what ? $1500 to $2000??
A used Porsche complete system, with low miles on it can be found between $600 to $1000 with cats and lambda on it.

Here is the 71 and 72 corvette mufflers. As well said, they were just a tip not welded on the exhaust.
http://www.psychoontyres.co.uk/wp-content/uploads/2012/08/11-IMG_2786sc.jpg

But I defo want to go with a square look. Sorry John Z....

[Lukas]

I mocked up some rectangular tips when at the shop getting my exhaust done. Sorry, I didn't take pics at the time, but they looked out of place with the stock round cutouts in the bumper.

Although I think they would look good if you rectangular-shaped cutouts as well.

Definitely get rid of the stock manifolds if you can. Bear in mind that the porsche system will probably require some work to fit, whereas the vendor DeLorean systems should be a direct fit replacement.

[Nicholas R]

From the actual design/engineering/retrofit standpoint, the first question in my mind is what is the spacing of the exhaust ports on the Porsche compared to the DeLorean?? If they're not almost exactly the same, you stock manifolds will be better than the Porsche headers. Next is that the bolt pattern on those headers is way different than the DeLorean. Each port has 3 mounting holes in a triangular shape where the DeLorean's engine head has 4 mounting points for each port and they're in a rectangular pattern. Lastly that muffler looks thicker than the DeLoreans muffler and space is already tight.

Still, where can you get a full Porsche 911 or 997 exhaust for $600-$1000? Porsche parts are among the most expensive car parts available, lol. I did some cant even find just the headers themselves for $600. Some quick googling showed full exhaust systems at significantly higher prices than DeLorean, $3k, $4k, $5k (for the cheap ones!). I suppose used ones would be less, but even still.

Did you see the price of the 997 exhaust you have pictured in the first post??
(This one)
http://dmctalk.org/attachment.php?attachmentid=18364&d=1366473494
In case you didn't, here's where its for sale: http://www.renntechmercedes.com/www/node/468

And it's price tag? $12,750

I say stick with the DeLorean stuff, haha :wink:

[ALEXAKOS]

@ Lucas: Images of the process would be great. Any difference on the output power? Have you been on a dyno?

@ Nicolas: I am all for keeping or even slightly modifying the excising manifold. Will have to lend that exhaust for a day and see it of fitting or additional work needed.
Yes that image I posted is of the very new and ridiculously expensive Porsche exhaust. What my deal is, I live in Greece and there is not Delorean dealer here. Not to mention I am the ONLY ONE with a D in my country. So I would have to import that original D upgrade. That costs an extra $200 shipping and 23% tax of invoiced goods.
Greece, as you have heard, is at a financial crisis. People have no money, gas prices have gone crazy ($9 per gallon!!!) and the government has imposed ridiculus taxes on luxury cars. So parts for those are funny cheap.

My exhaust alternatives are the following:
Turbo 997, 2005-2009 $1000
http://pho2.carcdn.gr/1943/1943771_0_b.jpg

Turbo 997, $700
http://s1.carcdn.gr/3252/3252580_0_b.jpg

Turbo 997, $600
http://s11.carcdn.gr/3490/3490145_c_b.jpg http://s11.carcdn.gr/3490/3490145_d_b.jpg

So I see that the cat intakes are quite short and the rectangular tip can be included.

Yes Lucas, I was also thinking of adjusting the rear fascia's exhaust mold to the rectangular one;)

[ALEXAKOS]

here is one on the germany ebay for 600 EUR buy it now and with make an offer option;)
http://www.ebay.de/sch/i.html?_sacat=0&_nkw=997+turbo+auspuff&_frs=1

[Kenny_Z]

I just ran across this on Tumblr.

http://25.media.tumblr.com/4b95b6b0b2cddd35f77621b49ff4b73a/tumblr_mlijokRJys1rhjs7po1_1280.jpg

[ALEXAKOS]

Ha! Good catch! Just the way I want it. Isn't that the D from the new music video!?
I would keep it on the original rear fascia.
Now we don't know of its "got Porsche " or just the tips.

[Kenny_Z]

Yep, it is. That was the caption from the page I found it on. The car is known around here so maybe someone has seen the exhaust?

[ALEXAKOS]

Great! So do we have any contact to our fella? Maybe some bare engine shots to see its connection to the manifold?

[Lukas]

@ Lucas: Images of the process would be great. Any difference on the output power? Have you been on a dyno?

My setup is based on the SpecialT system seen on this page http://www.specialtauto.com/delorean-parts/engine-tuneup.html Funnily enough, I don't have any pics of my exhaust headers yet! And no dyno either - I think I've made too many changes since the new exhaust for it to be a true comparison.

I was in a similar situation to you for the exhaust - also considered importing a vendor system. Priced this versus a custom made system, showing them pics of what was available, to be built by my local shop. It was cheaper to custom-make the system, including ceramic coating and fitment.

The major design issue is whether to stick with a standard looking single muffler (quieter, stock look, more complicated piping) or go with twin mufflers (louder, some people don't like the look, simplest system). Oh and whether your emission laws require a catalytic converter.

[ALEXAKOS]

First Yay: NO EMISIONS LAWS:)
Second YAY: I don't like loud exhausts but quality sound. For one, I am very upset with the original D sound. It's a 2.8 and sounds like a loud french 1.6 :(
Love the Porsche sound. Discreet elegant but with a touch of power to it. And the engine sizes are not that much different.

Thanx:)


Here is a sound vid of that turbo D

http://www.youtube.com/watch?v=fM8E3lKO2gg

Mark was kind enough to share it with me.
QUESTIONS:
- What is that slight whistling sound with it? The belts?.
- What is that sudden white smoke coming out on 1.55' on the left side?
- why are most D's idling so irregular?

[thirdmanj]

I just ran across this on Tumblr.

http://25.media.tumblr.com/4b95b6b0b2cddd35f77621b49ff4b73a/tumblr_mlijokRJys1rhjs7po1_1280.jpg

Isn't that the Thrift Shop car? The guy in Russia seems to have a nice exhaust set up. I'll have to find that thread, but it seems to look like the rear of the car flipped upside down.

[ALEXAKOS]

yeah but he did not cut out the rear fascia to evenly fit that tip. You can still see the round original port.
It is good if one ever wants to put the originals back on...

[1batt4u]

So far this is the best sounding DeLorean to me:


http://www.youtube.com/watch?v=OrOBCZWM8Zc

[ALEXAKOS]

Well, dono if ill be going with the 997 turbo exhausts. I did get me a set of those sweet looking tips on the German eBay. Will given a stainess steel look brush and have the DMC logo etched on them for starters. More soon:)

[thirdmanj]

Will given a stainess steel look brush and have the DMC logo etched on them for starters. More soon:)

Look out for CEASE AND DESIST letters!! ;)

[ALEXAKOS]

Look out for CEASE AND DESIST letters!! ;)
That must be an internal joke I don't get:( little help?

[thirdmanj]

That must be an internal joke I don't get:( little help?

Oh gee... Well I guess the short version is Houston ( who doesn't really own the "DMC" logo) likes to send out cease and desist letters when people used the font without their express permission. They have a stylized version of it which they've TMd. But the original DMC logo designed by GG, adopted by DMCL, is defunct.

The logo comes up in thread conversation from time to time.

[ALEXAKOS]

Oh that! Hahaha! Had no idea of the title. Well as long as I am not selling it or making multiple copies of it.... I can carve, etch, scribble, draw the DMC where ever I like:)

I don't suppose they would come over to Europe with that huh? A guy in Poland seems to be using the logo on different items. (Oops, should have not given that away:p)

[thirdmanj]

Oh that! Hahaha! Had no idea of the title. Well as long as I am not selling it or making multiple copies of it.... I can carve, etch, scribble, draw the DMC where ever I like:)

I don't suppose they would come over to Europe with that huh? A guy in Poland seems to be using the logo on different items. (Oops, should have not given that away:p)

Right. Even if you were, and they did, I doubt it'd go anywhere. Keep on on keepin' on bro'. And give that guy in Poland my best! ;)

[Starglider]

- What is that slight whistling sound with it? The belts?

No, that's the compressor wheel, all turbos do that to some extent. There are no belts involved with turbos, the turbine wheel is on the same shaft as the compressor wheel; superchargers have belts.


why are most D's idling so irregular?

AFAIK most idle hunting is from hysteresis / feedback loop in the idle speed controller (old electromechanical design) and lambda system (old unheated narrowband sensor). Any cylinder-specific issue (injectors, compression) will increase vibration and make hunting worse.