Not registered? Then you're not seeing all there is to see. Do you want to contribute? Register now by clicking HERE!
www.VNCommodore.com Support Site - Forums Page © 2005 - 2017
    Forums Page 

 
Main Menu

Start Page  
Forums  
Register  
Recipe Book  
Active Topics  
Active Polls  
Forum Search  
Online Auctions  
Online Classifieds  
FAQ  
Greeting Cards  
Guestbook  
Disclaimer  
Contact Us  
Links  
Username:

Password:

Save Password
Forgot your Password?

 
www.VNCommodore.com Support Forums
 All Forums
 General Area
 Technical Modifications
 VN V8 Exhaust Questions.
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  
  Current Topic Rating: Total Rating: 0 | Join the Forum to Rate this Topic at: www.VNCommodore.com Support Forums  

borochone
P Plater



16 Posts

Male

Posted - 19 Nov 2012 :  11:46:24 PM  Show Profile Send borochone a Private Message  Reply with Quote
 
im thinking about upgrading my exhaust system to a 2.5 inch Cat Back Sports Exhaust with the straight through tail pipe and a high flow cat converter.
i Know these sound good and increase performance on the VN V6
but im not sure How well this setup will Perform On a VN V8
or should i go 3 inch instead?

any information you could give me id be really grateful :)

Report to Moderator

VNSVLE
Forum Moderator


smiley-blunder

1316 Posts

Male

Posted - 20 Nov 2012 :  10:40:09 AM  Show Profile Send VNSVLE a Private Message  Reply with Quote
 
What engine mods have you got??
 

What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared.
Report to Moderator Go to Top of Page

borochone
P Plater



16 Posts

Male

Posted - 20 Nov 2012 :  11:24:16 AM  Show Profile Send borochone a Private Message  Reply with Quote
 
im ashamed to say none :( only a rising rate fuel regulator. and i upgraded to a inline bosch 044 fuel pump.
Report to Moderator Go to Top of Page

VNSVLE
Forum Moderator


smiley-blunder

1316 Posts

Male

Posted - 20 Nov 2012 :  11:29:58 AM  Show Profile Send VNSVLE a Private Message  Reply with Quote
 
No shame in that buddy!!
Personally I would be going 2 1/2 unless you plan on doing some major work in the near future that would warrant the 3 inch system.
 

What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared.
Report to Moderator Go to Top of Page

borochone
P Plater



16 Posts

Male

Posted - 20 Nov 2012 :  11:50:22 AM  Show Profile Send borochone a Private Message  Reply with Quote
 
the shame has disappeared man thanks to you :)
im gonna take your advice and stick with 2.5 cos im not planning on any other mods.
i also upgraded my throttle body to a 70mm, i forgot to mention that bro.
Report to Moderator Go to Top of Page

VNSVLE
Forum Moderator


smiley-blunder

1316 Posts

Male

Posted - 20 Nov 2012 :  1:50:41 PM  Show Profile Send VNSVLE a Private Message  Reply with Quote
 
Only other thing I would consider would be a good set of extractors to go with the system.
Cheers
 

What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared.
Report to Moderator Go to Top of Page

kingbucktoo
P Plater


misc-smileyred

54 Posts

Male

Posted - 20 Nov 2012 :  8:24:16 PM  Show Profile Send kingbucktoo a Private Message  Reply with Quote
 
VNSLE why don't you like the factory VN V8 headers???

I have looked at them thinking I could get some improvement with some mandrel bent pipes for the Y & a high flow cat.
I also have been wondering about the size of the exhaust back, but I was looking for a reasonably quiet system So I was going to keep the two mufflers.
Again my car has no head or cam work done. The price of extractors for a 5% improvement is not worth it on a stock motor.
Report to Moderator Go to Top of Page

VNSVLE
Forum Moderator


smiley-blunder

1316 Posts

Male

Posted - 20 Nov 2012 :  9:49:49 PM  Show Profile Send VNSVLE a Private Message  Reply with Quote
 
Sorry I was thinking the VN had the cast headers like the later models. The VN's run the tubular headers the same as the later model HSV's.
Although they are prone to cracking they are a good header for a standard to mild 5 litre.
I stand corrected thanks kingbucktoo!!
 

What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared.
Report to Moderator Go to Top of Page

Mechknight73
National Driver


robot-robot14

1001 Posts

Male

Posted - 23 Nov 2012 :  12:38:26 AM  Show Profile Send Mechknight73 a Private Message  Reply with Quote
 
Although to a point, anything you do to reduce restriction to exhaust flow will improve both fuel economy and power, not to mention will usually make the engine sound a bit angrier. There's a certain point where a bigger bore exhaust will just make it louder, and sometimes even retard performance. You see a lot of ricers with their 4 inch fart can mufflers, and all that does is make a 4 cylinder sound terrible!
Report to Moderator Go to Top of Page

m1kes
P Plater


music-dj

19 Posts

Male

Posted - 09 Aug 2013 :  5:04:43 PM  Show Profile  Visit m1kes's Homepage Send m1kes a Private Message  Reply with Quote
 
I thought with the VN v8 or v6 that a 50mm(2"inch) system was adaqaute enough. any bigger it causes probs .
 

Check twice,cut once.
Report to Moderator Go to Top of Page

Mechknight73
National Driver


robot-robot14

1001 Posts

Male

Posted - 18 Aug 2013 :  1:39:58 PM  Show Profile Send Mechknight73 a Private Message  Reply with Quote
 
It's definitely enough for a V6. I once saw a 4 inch exhaust on an HZ 308 (the last metre) and the rest of the exhaust up to the headers was somewhere near 3 inches, and there's no way that was street legal.

I don't remember what they call this class of blacktop racing, I once saw a race at Barbagallo that had V8 Toranas, Falcons and Ford Escorts. The Toranas mostly had open headers, exiting behind the front wheel, but even they weren't the loudest thing on the track. It was the 2 litre Escorts, and the engine note was like a needle through the eardrum.
Report to Moderator Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
www.VNCommodore.com Support Forums © 2005 - 2017 Go To Top Of Page  
This page shown in 0.16 seconds.   Snitz Forums 2000
Do not Click Here
   
 


Currently 111 user(s) online
 
Copyright © 2005 - 2017 by: Greening Computer Services