The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-25-2004, 08:08 AM   #1
Lippyp
English Chevy Owner
 
Lippyp's Avatar
 
Join Date: May 2002
Location: Shropshire, UK/ Lot, France
Posts: 1,848
Exhaust size question

As per my last post I now need to replace the two tail pipe sections of my exhaust. These exit just in front of the rear wheels and are about 4' ish in length from the mufflers. Looking at the mufflers it seems they have 3" outlets but have had reducers put on to fit I think 2 1/4" pipe. If I replace these with 3" pipe from the mufflers back is this likely to have any efffect on performance (i.e. is this a bad thing, will I lose too much back pressure?) and will it be louder as a result? It is currently pretty quiet and I like loud! I'm not expecting any performance gains just don't want to lose anything or damage anything.

Looking at getting it done in stainless if it's not too pricey as it'll last forever and will polish up real good on the ends.
__________________
Phil

'67 C10 long fleet.
350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon

2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission
Lippyp is offline   Reply With Quote
Old 05-25-2004, 08:40 AM   #2
Huck
Senior Member
 
Huck's Avatar
 
Join Date: Jun 2001
Location: Shelbyville, KY
Posts: 3,269
I don't think you will see much of a performance change one way or the other once you are down stream from the muffler. Up stream you tend to loose some low end torque if you go to a very large pipe.
Now if you go with a wide pipe at the very end of your exhaust, the sound will get louder and deeper-----I have 2.5" pipe leading to a 4" exit tip ---which makes for a neat mellow tone.
Huck is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:33 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com