You can get a Borla catback for $400. You see a lot of rumors flying around
here. I've been on the list for two years or so. From all I've listened to
plus the redundant talk, in most cases, a catback system will help you
out...regardless whether you have precats, no cats, or kittens. Obviously,
the more performance mods you have, both intake and exhaust, the better
it'll help. Headers, on the other hand, require a certain amount of mods
before you can see the performance gains. 3" catbacks are common on Daks
and work pretty well on all V8's. I can't speak for the V6's but Bernd can.
Like Steve St. Laurent says, you need to watch your exhaust diameter. If
you free it up too much you lose the exhaust pulse which is what creates
your torque in certain rpm ranges.
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@dakota-truck.net
[mailto:owner-dakota-truck@dakota-truck.net]On Behalf Of crm
Sent: Wednesday, May 29, 2002 10:24 AM
To: dakota-truck@dakota-truck.net
Subject: DML: Re: RE: Re: RE: Exhaust bottleneck?
interesting...i dont really have the $300+ to spend on the jet chip though
:( (yet :) wonder what adding new exhaust or just a muffler would do to
up that even more?
btw, just got back from a muffler shop. the guy said he could run 3" pipe
(single exit) from the back of the cat with a new magnaflow XL for $300
installed. this would be with aluminized steel...does that sound about
right? and would that be too much pipe for what i plan to use my truck for?
i.e. ---
> You only loose backpressure when applying large exhaust system without
> proper amount of exhaust.
and could someone clear up the "see-thru" vs. non see-thru concept? i have
read that a see-thru really isnt any better than any other turbo style
muffler, just wondering what the performance implications would be...
thanks again steve, you've given me even more to think about :)
-adam
----- Original Message -----
From: "Stlaurent Mr Steven" <STLAURENTS@MCTSSA.USMC.MIL>
To: <dakota-truck@dakota-truck.net>
Sent: Wednesday, May 29, 2002 11:36 AM
Subject: DML: RE: Re: RE: Exhaust bottleneck?
>
> It all depends of the previous restriction and the new application:
meaning
> the flow pattern.
>
> The original CAT is crap compared to the added restriction of the main
CAT.
>
>
> However, the best I have seen is the Flowmaster DELTA flow design. Less
> restricted and maintains the back pressure for low end and allows the high
> flow when pedal is to the metal.
>
> To reach the 208HP (or close), is do what I did: 1) 180 degree
THERMOSTAT,
> 2) colder spark plugs and running Bosch 4s or 2s, 3) Add REDLINE to the
> Radiator fluid, 4) Change the intake to the 'Z' tube, 4) added the Jet
Stage
> II chip, 4) beta truck for Bruce's 4 inch 68MM TB unit. The truck was
dynode
> at 208HP when the MPH limiter hit 97. I did not add the exhaust before
this
> or change out the muffler. This included the CA smog CATS.
>
> You only loose backpressure when applying large exhaust system without
> proper amount of exhaust.
>
> The HO 4.7 uses the 3-inch exhaust pipes.
>
> --------------------------------------
> Steven St.Laurent
> C4i System Engineer
> C4i Engineering Branch, PSD, MCTSSA
> MARCORSYSCOM, U.S. Marine Corps
> Office (760) 725-2506 (DSN Prefix: 365)
> "Never be content with somebody else definition
> of you. Instead, define yourself by your own beliefs,
> your own truths, your own understanding of who
> you are. Never be content until you are happy with
> the unique person GOD has created you to be."
>
> -----Original Message-----
> From: crm [mailto:tb.crm@verizon.net]
> Sent: Wednesday, May 29, 2002 9:11 AM
> To: dakota-truck@dakota-truck.net
> Subject: DML: Re: RE: Exhaust bottleneck?
>
>
> Yep - got the intake, t-stat and plugs scheduled for this weekend. Might
go
> with a Fastman TB in another couple weeks.
>
> You mentioned headers - but then said i could goose it up to 20X (rwhp)
> without doing an exhaust system. You mean not changing the muffler or
cats?
> I guess I am a little confused...
>
> > You will be pushing the truck from the normal 18XHP at the wheel to 20X
> > without adding the exhaust system.
>
> Will I have enough back pressure but still feel a performance boost by
> adding a new muffler keeping the stock pipes?
>
> Thanks for the response!
>
> -adam
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:04:37 EDT