Re: [DML] DMCH exhaust with alternate muffler installed

["K.L. (KAYO) Ong" <klo@xxxxxxxxx>]

Hi, Andy:

Your posting on the DMCH exhaust system and your hassle with the  
installation as well as the final cost of $1,800 is about the same  
cost of the Stainless Exhaust System from England (without the  
cats).  Several years ago I had contemplated between the two systems  
and I had decided on the Stainless Steel System for it is  
manufactured with a heavier gauged stainless steel with the tubing  
and the muffler.  The Stainless Steel System is all welded together  
with mounting flanges that used to installed the system together by  
nuts and bolts and not by the traditional muffler clamps as used by  
DMCH.  The welds on the Stainless Steel System are mechanical and  
artistically done.  The installation of the system was a "no hassle"  
as told to me by Pat from PJ Grady who had installed the system.  Pat  
had claimed that the Stainless System fitted exactly onto all of the  
OEM hanger mounting points and does not need modifications, the only  
problem Pat had expressed was that the holes on the mounting flange  
which had to be fitted onto the engine block should had been slightly  
bigger so it could slipped easier onto the engine's studs -- He had  
to ream the holes bigger to give some room to fit onto the engine's  
studs.

BTW, there is no "fatiguing" droning effect with the Stainless Steel  
System as you expressed with the DMCH system.  This droning effect is  
a common problem with the Flowmaster muffler system that I also have  
had in the custom fabrication that I had on my DeLorean to which I  
had then promptly remove right after I had fro about a month’s time.

All in all, both of the Stainless System and the DMCH exhaust systems  
are noisier then the OEM, but the trade off with both systems are  
that there will be more power and it is peppier, which offers the  
DeLorean with a different feel, as well as it is “be driven.”   With  
either system, everyone will notice the unique sound before they turn  
their heads to that it is see a DeLorean.....

I still wish the exhaust's decibels is lower so I can hear the  
nuisances from my sound system.  Hey, how is your sound system in  
your DeLorean?  Any new upgrades or modification since then?

Kayo Ong

#5508

Lic 9D NY




On Apr 23, 2006, at 6:53 PM, Soma576@xxxxxxx wrote:

> Hey Group,
>
> Well today was a pretty good day for me, all things considered.   
> Jim  Reeve
> came 250 miles to help me reinstall my engine and transmission,  
> make sure
> everything was adjusted properly, and to install DMCH's  
> performance  exhaust.  At
> the urging of another DMLer, I swapped the Flowmaster muffler  for  
> a similar
> Magnaflow muffler, which alleviates the concerns many have   
> expressed with a
> raspy sound and burbling on decel.  I had the Magnaflow  muffler  
> Jet-Hot coated
> just like the rest of the system and with some minor  modifications  
> to the
> hangers, everything went together very easily (but quite  tight!!).
>
> Here are my thoughts with this exhaust system.  It is built well  
> and  looks
> really good with the Jet Hot coating.  It fits really tight but   
> that's OK
> because it does go together easily once you figure it out.  I  feel  
> an increase in
> torque in 1st and 2nd gear accompanied by a MUCH more freely   
> revving engine.
>  There are a few burbles and hiccups on deceleration but  they are  
> very
> slight and are of no concern.  The exhaust sounds deeper with  a  
> throatiness that
> must be heard to be believed. No raspy or rice-burner  sounds.  I  
> actually WANT
> to rev it up and hear it!  In fact I don't  think I need a stereo  
> anymore
> because I'd rather hear the exhaust!!   The downside is that the  
> deep roar of it
> is a little strong at some low RPM's  and could get fatiguing, but  
> I think
> it'll be fine for what I use the car  for.  I also noticed that the  
> pass side of
> the exhaust system hangs  slightly lower than the driver side.   
> That is not an
> installation mistake,  it is determined by the tubing and the way  
> it all fits
> together. I am planning  on bringing the car to an exhaust shop to  
> see if
> they have any ideas for  correcting this.  It's very slight and is  
> only an
> annoyance for an anal guy  like me.  Another problem with this  
> system is that DMCH
> really needs to get  on the ball and provide some good decent  
> instructions for
> the system as well as  tips and tricks for a successful install.   
> Some issues
> I had include  brackets being drilled incorrectly, a total lack of
> documentation that James  Espy graciously sent to me via mail (but  
> it was only Jet-Hot
> documentation and  nothing pertaining to the install), missing  
> gaskets for the
> cat-to-header  connection (which I got at autozone, and I have  
> talked to other
> owners who say  that DMCH does not provide these - emails went  
> unanswered), I
> also had to  lengthen the wire for the Lambda probe (no  
> documentation to warn
> about this), as  well as the most curious instance of one of the  
> included
> manifold studs  being too long so that it interferes with one of  
> the header
> pipes!! I had to put  it in backwards so the header would clear  
> it.  Would have been
> nice to know  that ahead of time.  Also the gaskets that came for  
> the headers
> were  terrible and I had to get sandwiched plate gaskets from  
> Volvo.  BUT I
> am  being kind of unfair because DMCH did modify one of the headers  
> for me at
> no  charge to accommodate a quirk with my engine caused by a  
> dreaded PO.   That
> made up for all the little annoyances.  Overall I am glad I made   
> this move!
> It was worth the cost (almost $1800 after 2nd muffler and  little  
> bits).
>
> The only thing I have a problem with is my front main seal.  We   
> started the
> car last night and it didn't leak.  In the morning there were  no  
> signs of
> leakage.  Then once we were done with the car we took it for a   
> cruise and at our
> destination we saw a few drips of oil coming from the front  seal.   
> Turns out
> that it doesn't leak while running or sitting, but after  you shut  
> the engine
> off after a drive it leaks about 10 drips in a row and then   
> stops.  I just
> replaced the seal with Grady's double-lip seal and I sleeved  the  
> pulley too.
> Tonight when the engine cools down I am going to change  the oil  
> because what
> is coming from the pulley looks really watery and has a  reddish  
> tint to it
> (which is probably the gasket sealer spray I used when  replacing  
> the oil pan
> gasket).  I wonder if the gasket spray, which  oversprayed a  
> little, has diluted
> into the oil and is acting as a transfer agent  through the seal?   
> Well
> that's why I am changing the oil (with Mobil Delvac  Super 1300) so  
> I can eliminate
> contamination.
>
> Any other ideas on this?
>
> Many thanks go out to Jim Reeve (whom I now owe a full day of help  
> with his
> car!!), Jason Czarnecki, and Dave Swingle (for tons of advice and good
> tips!).  Can't wait for Pheasant Run!
>
> Andy Lien
>
> Fargo, ND
> 1982 DeLorean DMC12 VIN 11596
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
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