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GermanLookT2 Samba Member
Joined: December 12, 2003 Posts: 74 Location: Maryland
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Posted: Thu May 18, 2017 8:35 pm Post subject: Re: Exhaust options camper special engine |
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I have a turbothomas header and had a custom wraparound dual muffler setup similar to the ahnendorp style. Theres still quite a bit of resonance and I have been debating losing the muffers and replacing with a whole new VS setup. Recently I have been thinking to weld in a used 993/996 single right side muffler (like a hideaway) and preserve the merged header since it is stainless and equal length piping. Im not convinced the single muffler options are quiet enough. but figuring a 993/996 n/a puts out 300hp and uses 2 mufflers and is fairly quiet...
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udidwht Samba Member
Joined: March 06, 2005 Posts: 3779 Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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Posted: Thu May 18, 2017 9:07 pm Post subject: Re: Exhaust options camper special engine |
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Bleyseng wrote: |
Took the stock muffler I was running off as I finally installed the repaired SS setup. CHT's were down a good 15-20 degrees running at 70 mph on a run upto Mt Vernon Sunday.
Looking to order the SS empi muffler I guess for a long term solution. My S&S exhaust is rusty as hell and repaired. |
Any pics Bley?
Mine has held up well since 1988. I annually hit it with some sand paper, inhibitor and VHT paint. Certainly better than the current offerings these days. _________________ 1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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dawie Samba Member
Joined: July 27, 2008 Posts: 217 Location: Cape Town, South Africa
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Posted: Thu May 18, 2017 11:12 pm Post subject: Re: Exhaust options camper special engine |
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If resonance/droning sound is an issue... add a few feet more length of tubing after the last muffler. Extend to have outlet on the other side.
Seeing that you already have good volume inside the mufflers, this extra length will tune the resonance to a lower, less irritating, frequency.
Easy to test... Just temporary add some length and listen. |
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notchboy Samba Member
Joined: April 27, 2002 Posts: 22448 Location: Escondido CA
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Posted: Fri May 19, 2017 8:30 am Post subject: Re: Exhaust options camper special engine |
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dawie wrote: |
If resonance/droning sound is an issue... add a few feet more length of tubing after the last muffler. Extend to have outlet on the other side.
Seeing that you already have good volume inside the mufflers, this extra length will tune the resonance to a lower, less irritating, frequency.
Easy to test... Just temporary add some length and listen. |
More tube? It already looks disemboweled _________________
t3kg wrote: |
OK, this thread is over. You win. |
Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top |
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DougB Samba Member
Joined: January 09, 2007 Posts: 1076 Location: Falls Church, Virginia, USA
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Posted: Fri May 19, 2017 11:34 am Post subject: Re: Exhaust options camper special engine |
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Hello all,
OK, I've driven with the stainless EMPI header exhaust for a week or so now and can report some results. Remember that I was more recently running the stock muffler, and before that the VS muffler with the dual outlets (the only one that was available from them when I bought it, though I know they have the single outlet one now). Also, I had oxygen sensors installed in all of them, connected to my PLX Devices AFR meter.
So what do I think of the stainless EMPI header exhaust after a week? I really like it! I had the plain steel version of this exhaust when I received my CS from Jake, and it was decent (a little louder than this one) but after a few months a hole blew in the side of the muffler can.
Compared to the stock exhaust, here's what I notice with this one:
- about the same AFR readings (typically between 12.3 and 12.
- maybe a 5% reduction in CHT readings
- a little louder than the stock muffler but still closer to stock than to the VS, which was too loud at highway speed for me
- I feel like there's more torque...for example, during my afternoon commute there's this hill, and with the stock muffler I'd take it in 4th but you can feel the power draining...but with the new muffler, the power is more sustained
- I feel like I don't have the throttle depressed as much at certain times as I did with the stock muffler
Cons:
- interferes with my Jamie Miller receiver hitch, which I had to remove while I modify it
- the tailpipe interfered with my bumper overriders, so I had to move them inward
All in all I'm happy with the purchase. I think I'm done swapping exhausts for the time being. _________________ '75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife |
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notchboy Samba Member
Joined: April 27, 2002 Posts: 22448 Location: Escondido CA
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Posted: Fri May 19, 2017 12:02 pm Post subject: Re: Exhaust options camper special engine |
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DougB wrote: |
All in all I'm happy with the purchase. I think I'm done swapping exhausts for the time being. |
I hope so, you have three now and the VS is a pricey piece of wall art _________________
t3kg wrote: |
OK, this thread is over. You win. |
Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top |
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DougB Samba Member
Joined: January 09, 2007 Posts: 1076 Location: Falls Church, Virginia, USA
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Posted: Fri May 19, 2017 12:06 pm Post subject: Re: Exhaust options camper special engine |
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Amen! There was a local guy who PM'd me about the VS, but he never responded. I still don't have as many spare mufflers as you have Essens or tents, though _________________ '75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife |
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airkooledchris Samba Member
Joined: January 25, 2005 Posts: 2707
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Posted: Fri May 19, 2017 12:11 pm Post subject: Re: Exhaust options camper special engine |
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DougB wrote: |
Amen! There was a local guy who PM'd me about the VS, but he never responded. I still don't have as many spare mufflers as you have Essens or tents, though |
and neither of you have a single classified ad posted. hoarders! |
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DougB Samba Member
Joined: January 09, 2007 Posts: 1076 Location: Falls Church, Virginia, USA
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Posted: Fri May 19, 2017 12:14 pm Post subject: Re: Exhaust options camper special engine |
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LOL, yeah, there's that I did have some ads but they expired. I'd be happy to sell the VS to anyone, but really don't want to ship it. _________________ '75 Campmobile (tin-top to SpaceRoof)
'73 Fastback
'52 BMW R67/2
'41 Zundapp KS600
'55 Puch SGS250
A very, very understanding wife |
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notchboy Samba Member
Joined: April 27, 2002 Posts: 22448 Location: Escondido CA
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Posted: Fri May 19, 2017 12:35 pm Post subject: Re: Exhaust options camper special engine |
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DougB wrote: |
Amen! There was a local guy who PM'd me about the VS, but he never responded. I still don't have as many spare mufflers as you have Essens or tents, though |
And Eberspachers, distributors, air pumps, hazet assistents.....
I am a hoarder, well kinda. When it all matures or I find another shinny thing I sell.
I have two Essens on deck and a middle seat that should go up this weekend _________________
t3kg wrote: |
OK, this thread is over. You win. |
Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top |
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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21510 Location: Oklahoma City
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Posted: Fri May 19, 2017 12:36 pm Post subject: Re: Exhaust options camper special engine |
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Nice to hear! Thank you for the review.
Ray |
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