-----Original Message-----
From: Jim, Donna, Erin, and Brian <leefam@wcc.net>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Sunday, November 22, 1998 10:42 PM
Subject: Re: DML: Re: Frank's TB Vol. #1
>>Be carefull with too little restriction though, as I think I've gone too
>>far. I've
>>got one of Frank's Stage II's, DT headers, 3"collector-- 3" pipe, 3"
in/out
>>CAT, 3" pipe, 3" Ultra FLO (aka Straight pipe w/no packing), and finally
>>a 3" tailpipe... VERY loud, and I believe has killed my low end
(1500-2500
>>rpm)... Best mileage was 16.5 so far, mixed city/hwy driving... City
>>driving
>>now yields 13-14 whereas I got 15.6-16 consistantly previously (before
>>the 3" CAT work). The TB works fine, and I've adjusted my driving for the
>>off idle surge that occurs....
>>
>>Sam '95 SLT
>>
>>
>Hmmm....now you've got me wondering.
>
>I was planning to swap to DT headers, 3" pipe to a 3" Dynomax cat then to a
>3" UltraFlo with dual 2.5" outlets to a set of A-body tips. Is this going
>to kill my low end torque?
>
>Thanks,
>
>Brian
>
Not necessarily. The dual 2.5" actually has more surface area than a
single 3",
so dual 2.5" has more backpressure than a single 3" (I'd do the math to show
you,
but it's real early and I have to get the Dodge Dealership to be the first
in line to get
the wife's RT in)...
Personally, I'd leave the stock 2.5" pipe from the front of the CAT, and
only get
the 3" in/out CAT, and dual 2.5" exhaust (*or a single 3") with the DT
headers.
Leaving the stock 2.5" pipe from the front of the CAT to the DT headers is
only
1.5-2' of pipe, but it makes a difference.
I plan on Dyno-ing my truck again to see where things stand with HP /Torque
compared to my previous runs.
Sam '95 SLT
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:11:06 EDT