Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
SCWDP911's Avatar
 
Join Date: Oct 2006
Location: Jackson, TN
Posts: 6,577
Garage
Exhausting question - turbo vs. NA

I just had a noobish question about exahausts. Every once in a while I see an exhaust advertised for "turbo 911's or 930's. If the engine was 3.0, but NA instead of turbo, aside from modifying the outlet piping a bit from HX to muffler inlet, to get rid of the turbo section, is there anything in a "turbo" muffler that makes it unusable for an NA car? I know from Miata days, that some engines require properly tuned muff's... in my limited 911 knowledge, I have never read anything that would say that that school of thought applies to 911's.

Sorry to be so windy for a simple question... Can someone set me straight?

__________________
Shane

- 1984 928S
Old 06-04-2007, 09:59 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Gon fix it with me hammer
 
svandamme's Avatar
 
Join Date: Sep 2003
Location: In Flanders Fields where the poppies blow
Posts: 23,537
Garage
NA needs backpressure to run smooth in lower revs
something a turbo get's... from it's turbo anyway
don't know if a turbo muffler is different, but a 911 NA generally does require backpressure...without it , rough idle and low torque down low... great at WOT though, so racers don't care about it so much and can run open pipes and whatnot
__________________
Stijn Vandamme
EX911STARGA73EX92477EX94484EX944S8890MPHPINBALLMACHINEAKAEX987C2007
BIMDIESELBMW116D2019
Old 06-04-2007, 12:27 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
SCWDP911's Avatar
 
Join Date: Oct 2006
Location: Jackson, TN
Posts: 6,577
Garage
Thanks, that helps...
__________________
Shane

- 1984 928S
Old 06-04-2007, 12:31 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 15,012
Garage
There was a Carrera widebody slant at the Cal Turner show that had a 930 muffler grafted onto a Cat relacement pipe. Pretty slick setup that mocked the turbo look. The muffler should work just fine in any application. It is similar internally to the typical "hotdog" of the early N/A engines.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'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 06-04-2007, 01:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
SCWDP911's Avatar
 
Join Date: Oct 2006
Location: Jackson, TN
Posts: 6,577
Garage
Would the HX's have a smaller diameter on the turbos, or are they also the same? Brian, did you get my last email yet about the route for the next Fun Run?

__________________
Shane

- 1984 928S
Old 06-04-2007, 01:17 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Reply


 


All times are GMT -8. The time now is 04:48 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.