Considering X Pipes for 1986.5

  • babromovage
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05 Dec 2011 14:02 #7285 by babromovage
Considering X Pipes for 1986.5 was created by babromovage
Considering X pipes for my 1986.5. I live in PA and have antique plates for my car. This means I do not need an emissions test. Should I go with Xpipes without the cats? Or, do I get hi flow cats? Also, I have installed already the latest Porken Chip set. He had asked if I had X Pipes and I said I did not. What effect would this have no that I am considering putting the pipes on?

Any insight would be greatly appreciated.

Brian

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06 Dec 2011 07:16 #7287 by smtcapecod
Replied by smtcapecod on topic Considering X Pipes for 1986.5
I have antique plates in MD, and planned along similar lines.

I opted to go for high flow cats, 100 cell count, available from Mandrel Bending Specialties on ebay.

I used an Ott x-pipe that I've had for years.

And built the system back from there. Well, actually, had a shop I'm familiar with build it back from there, using 928 Motorsports/Stebro v.1 mid pipes. With OEM final muffler, it is quiet, with no final muffler it is loud...I'm still in pursuit of "just right"...

I recommend talking directly with Ken. I believe the concern is that sufficient exhaust flow and improved scavenging of gases from the cylinders can lean out the fuel mixture to a point where the additional ignition advance and leaning of A/F ratio can give rise to concerns about detonation. IIRC, he provides advice to check the CO post-install and recalibrate the MAF if need be- if too lean conditions arise, and not that he has separate programming. But again, I recommend talking with him directly in case I'm mistaken.

Attached files [img]media/attachments/7455=812-x_Cars_dual.jpg[/img]

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09 Dec 2011 05:52 #7319 by the flying scotsman
Replied by the flying scotsman on topic Considering X Pipes for 1986.5
Not sure about your specfic Model year but the S4, GT and GTS models breath significantly better with a Xpipe. In my experience it might have been exagerated by partially plugged cats but either way it frees up the engine to freely rev.

From a noise issue my car was too loud with the x and RMB so I went back to a stock GT rear muffler with OEM small resonators...........perfect balance between power and noise level.

I do not run cats, dont have to but I would think of adding them if doing over as the car does emit unpleasant odour.

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09 Dec 2011 06:07 #7321 by babromovage
Replied by babromovage on topic Considering X Pipes for 1986.5
Thanks for the insight

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09 Dec 2011 10:43 #7323 by 928mac
Replied by 928mac on topic Considering X Pipes for 1986.5

Not sure about your specfic Model year but the S4, GT and GTS models breath significantly better with a Xpipe. In my experience it might have been exagerated by partially plugged cats but either way it frees up the engine to freely rev.

From a noise issue my car was too loud with the x and RMB so I went back to a stock GT rear muffler with OEM small resonators...........perfect balance between power and noise level.

I do not run cats, dont have to but I would think of adding them if doing over as the car does emit unpleasant odour.




Thats what that smell was

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Just jokeing buddy, Brad

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09 Dec 2011 21:19 #7331 by pcar928fan
Replied by pcar928fan on topic Considering X Pipes for 1986.5
Yea, w/o a cat they don't smell great, but it is not to offensive. How often are you sitting around at the rear of your car with it running anyway???

James
78 Silver / Black-white #295
84 Ruby Red / Black AO84
88 Dark Blue / Linen-Black
92 Polar Silver / Dark Blue 92EURO
93 Arrow Blue / Black

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10 Dec 2011 11:45 #7334 by smtcapecod
Replied by smtcapecod on topic Considering X Pipes for 1986.5

How often are you sitting around at the rear of your car with it running anyway???


Remember, the man did just get married..:D

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10 Dec 2011 22:39 #7347 by pcar928fan
Replied by pcar928fan on topic Considering X Pipes for 1986.5
LOL, yea, already trying to kill himself to get out of it! Hahahahaha!

Just kidding Brad!

James
78 Silver / Black-white #295
84 Ruby Red / Black AO84
88 Dark Blue / Linen-Black
92 Polar Silver / Dark Blue 92EURO
93 Arrow Blue / Black

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11 Dec 2011 12:56 #7348 by 928mac
Replied by 928mac on topic Considering X Pipes for 1986.5
no I have to much to live for and a 928 to love.
But sometimes you just have to show the world that you are a man.


.

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  • babromovage
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12 Dec 2011 12:18 #7367 by babromovage
Replied by babromovage on topic Considering X Pipes for 1986.5
FYI.....Here is what Ken had to say..."The chipset you have will work with stock cats or an X-pipe with the stock mid-exhaust and rear muffler or RMB.
If you go with a big custom rear exhaust too, EG dual 2.5" all the way back,
I recommend getting the WOTpot, so the WOT mixture can be adjusted
(richened) to suit."

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12 Dec 2011 18:44 #7369 by smtcapecod
Replied by smtcapecod on topic Considering X Pipes for 1986.5
Ah, back to good concrete and on-topic information.

Thank you for closing the loop, that is actually helpful to me. Though I find the description of the WOT POT on Ken's website a bit cryptic.

Also for some on-target first person..views... forums.rennlist.com/rennforums/928-forum...-crossover-pipe.html

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