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USA vs ROW exhaust differences...

Too lazy to search...

What is the difference between early and late exhaust for USA and ROW cars? I know some had the thermal reactors that everyone ditched and the later 86-89 USA exhausts were better, but the same as some ROW cars maybe?

To make a long story short, I have some interested in my 87 USA exhaust for his 84 ROW 930. I don't know if his is shot or what, but there's no point in selling him something he doesn't need.

Jim
Old 12-17-2009, 12:45 PM
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I think in the later years they were the same, except the US cars had the cat above the muffler. hell, I haven't seen a stock exhaust in almost 10 yrs. I haven't seen a muffler in 2.lol
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Old 12-17-2009, 12:54 PM
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Early USA exhaust (thru '79) looks like this:



This is the original factory stuff from my car, except that somewhere along the way a P.O. ditched the thermal reactors and put in the thermal reactor replacement "headers"

Known to be restrictive and supposedly a primary reason why US spec 3.3 liter 930 were rated at 265hp vs. 300 for ROW.

I believe that US 86-89 exhaust was the same as the ROW exhaust that was used all along on the 3.3 liter cars (not sure about the very early cars though).
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Old 12-17-2009, 12:55 PM
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beancounter
 
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In case you were wondering why these are junk. If you peek inside the heat exchanger, you can see that there is a single tube that takes the path indicated in this doctored photo:

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Old 12-17-2009, 01:02 PM
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Jake, I think you're right about all ROW cars having the same exhaust as the later 86-89 USA exhuast.

Here's a picture of my 87 exhaust.


Last edited by A930Rocket; 12-17-2009 at 01:27 PM..
Old 12-17-2009, 01:24 PM
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All 930 exhausts systems, USA and ROW, from '86-'89 were the same.
There were no USA 930 cars from '80-'85.
The '76-'77 Euro and '76-'79 USA 930 had the restrictive exhaust pictured above by Jacob.
The '78-'89 ROW and '86-'89 USA 930 had the same exhaust pictured by Rocket.
So yes your system will fit an '84.
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Old 12-17-2009, 01:49 PM
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Thanks guys.
Old 12-17-2009, 04:00 PM
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BTW does anyone have a decent set of these "headers" they are willing to part with on the cheap? Mine are sporting some cracks and the metal looks like it will crumble if I try welding.

thanks,

Pat
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Old 12-17-2009, 09:03 PM
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Quote:
Originally Posted by infraredcalvin View Post
BTW does anyone have a decent set of these "headers" they are willing to part with on the cheap? Mine are sporting some cracks and the metal looks like it will crumble if I try welding.

thanks,

Pat
I have them in Stainless steel never been used I got them from MSDS. everything except the turbo,outlet of wastegate, and muffler are available

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Last edited by gsmith660; 12-18-2009 at 03:57 AM..
Old 12-18-2009, 03:36 AM
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I was told that the 76, 77 euro's were far better
than us versions. They were rated at 265 as opposed to 245 for the us versions.
Old 12-18-2009, 06:23 AM
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Quote:
Originally Posted by infraredcalvin View Post
BTW does anyone have a decent set of these "headers" they are willing to part with on the cheap? Mine are sporting some cracks and the metal looks like it will crumble if I try welding.

thanks,

Pat
These were used instead of those dredded USA thermal reactors before the later systems were developed for ROW and 86 & up USA cars. affectionatly refered to as shorties. May sell, better photos of the entire system can be taken. infraredcalvin PM sent
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Last edited by voitureltd; 12-18-2009 at 02:07 PM..
Old 12-18-2009, 02:03 PM
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alright, it looks like i've officially hijacked this thread, sorry Rocket...

I've had a few offers now, one from someones 2.7 N/A car. Anyone know the difference - if any from the N/A version vs Turbo?
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Old 12-18-2009, 09:18 PM
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Why would you want to replace it with the original power robbing part. Just contact RarlyL8 for a better header system or check out the pelican shop. It will free up some pumping losses and make your engine more efficient. If money is really tight then I understand just swapping the miniheader.
Old 12-18-2009, 11:14 PM
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Quote:
Originally Posted by smurfbus View Post
Why would you want to replace it with the original power robbing part. Just contact RarlyL8 for a better header system or check out the pelican shop. It will free up some pumping losses and make your engine more efficient. If money is really tight then I understand just swapping the miniheader.
Just picked up 83 turbo brakes and a rarlyl8 muffler, funds (at least as it relates to my car in my wife's eyes) are low, so i'm just looking for a quick bandaid.
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Old 12-19-2009, 08:18 AM
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The heat exchanger bipass pipes are at least a step in the right direction. It would be relatively easy to encase those bipass pipes to give you a little heat back.

A viable alternative is to replace the early restrictive system with the Euro system Rocket pictured. That will give you an instant 35hp and allow the entire system to perform better. These can be had for a few hundred dollars so a great bang for the buck.
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Old 12-19-2009, 09:26 AM
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Thats what I did based on your venerable advise. It would occur to me that it would not be that resrictive if the pipe dia. at the collector would be bigger. I understood when I bought these 20+ years ago that the lag would be decreased because of the short route to the turbo is that not valid?



Quote:
Originally Posted by RarlyL8 View Post
The heat exchanger bipass pipes are at least a step in the right direction. It would be relatively easy to encase those bipass pipes to give you a little heat back.

A viable alternative is to replace the early restrictive system with the Euro system Rocket pictured. That will give you an instant 35hp and allow the entire system to perform better. These can be had for a few hundred dollars so a great bang for the buck.
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76 Blazer also restored by me
Old 12-19-2009, 09:41 AM
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Quote:
Originally Posted by gsmith660 View Post
I have them in Stainless steel never been used I got them from MSDS. everything except the turbo,outlet of wastegate, and muffler are available

You have a PM.
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Old 12-26-2009, 03:06 PM
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You have a PM.
You have a PM back
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" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go!
76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3
76 Blazer also restored by me
Old 12-26-2009, 05:11 PM
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If I was to sell these (and I am), would $200 for the setup pictured be a good number?

Quote:
Originally Posted by RarlyL8 View Post
A viable alternative is to replace the early restrictive system with the Euro system Rocket pictured. That will give you an instant 35hp and allow the entire system to perform better. These can be had for a few hundred dollars so a great bang for the buck.
Old 12-26-2009, 05:56 PM
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$200 should be very fair in this economy. Two years ago the Euro setup was worth $500.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 12-26-2009, 06:30 PM
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