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Questions/Specifics about my exhaust 

 

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 Post subject: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 9:33 pm 
Parts Gopher
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Age: 28

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Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

Hi All

recently put a CMS stg 2a cam/head package on my falc. cant rap joe from cms enough on his service,value and workmanship. car goes like a cut cat. but my problem/what i want to improve, is getting into that lovely powerband
example - flatting it from stop, the car winds up, as its a gli i have no tacho, but at what sounds about 3-3.5k rpm it all comes on and the car absolutley flies. but below that its still a bit of a slug
after probing more experienced minds than me im going for a 3.7 limo diff and manualising along with thermofan conversion that should perhaps solve it. but ive been sniffing around a bit and somehting i want to know is this

im running a straight pipe exhaust. no mufflers. yes its loud as f**k etc etc, but i was recently informed that to get the best out of my car both stock and especially now with a cam and some headwork, ill need to attach at least some kind of muffler to generate some backpressure, as with a straight out system i have none, which is why the car is a slug from the line
so i want to know what kind of muffler firstly, ive been told turbo mufflers i.e straight through glasspack? is a good bet, but i dont get how that would help as its a straight through muffler?
and is there any partucular brand or type of muffler that is best to use to get the best gains, or even entire cat-back system to use. when i bought the car it had, and still has, some genie headers, and when i do the exhaust ill be replacing the cat with a 100cspi on from venom

so for all those who wen tl;dr, will adding muffler to generate/increase backpressure help with off-line acceleration

thanks

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 9:36 pm 
Getting Side Ways
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Age: 27

Posts: 584

Joined: 4th Apr 2010

Ride: AU falcon

Location: toongabbie
VIC, Australia

try a supercheap auto $99 cannon....heard good things about them

should pick up about 10rwkw

 

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Au factory 5sp, rolling on 20'z, full custom extractors, redback cat and back. has a new motors, only 27,000ks

Welcome to Toongabbie motorsports :P

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 9:38 pm 
Parts Gopher
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Age: 28

Posts: 79

Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

hey man ive already got the hectic krew stickers on thats given me half the power it makes already

or were you taking the piss?

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 9:50 pm 
Getting Side Ways
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Age: 27

Posts: 584

Joined: 4th Apr 2010

Ride: AU falcon

Location: toongabbie
VIC, Australia

taking the piss :P

try a full redback 2.5 with one muffler and a hotdog resinator.

will give you a good note with little drone. not too pricey also aussie made.

 

_________________

Au factory 5sp, rolling on 20'z, full custom extractors, redback cat and back. has a new motors, only 27,000ks

Welcome to Toongabbie motorsports :P

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 9:55 pm 
Parts Gopher
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Age: 28

Posts: 79

Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

ive heard redbacks rust to the s**t? lukey sounds good, but id assume they would be a price jump over whatever eklse

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:02 pm 
Getting Side Ways
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Age: 27

Posts: 584

Joined: 4th Apr 2010

Ride: AU falcon

Location: toongabbie
VIC, Australia

iv had a redback on for coming up 2 years and still is fine, still has a fair amount of the black paint on it from when i bought it, and i get it fairly hot aka give it a caining.

also if you drive longer distances very often an exhaust should last ages.

i drive 40ks to work and 40ks home....gets it hot so removes all the moisture

 

_________________

Au factory 5sp, rolling on 20'z, full custom extractors, redback cat and back. has a new motors, only 27,000ks

Welcome to Toongabbie motorsports :P

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:13 pm 
Moderator
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Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

the back pressure thing is a myth, but you definatly need a mufler to make it sound nicer...

ive got 3" system on mine with high flow cat and mufler (basically straight through) and off boost the car still pulls better with the 3" system then it did with the 2 1/2..
not saying you need a 3" but the i think your problem under 3000rpm is your tall 1st gear in the auto and the 3.08 diff ratio, combined with the characteristics of an aftermarket cam..

what an aftermarket cam gives mid range and up top, it will take from the low rpm..
its a trade off, loose some bottom end to gain alot up top..

a 3.45 or even 3.77 will make it come alive..and still cruise reasonably well...
otherwise a manual gear box will fix everything. :) .
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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:22 pm 
Parts Gopher
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Age: 28

Posts: 79

Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

yeah ive already got changes to those two (diff and gearbox) in motion

so what specific type of muffler is recommended? a straight through muffler, a sports muffler?

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:24 pm 
Getting Side Ways
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Location: Brisbane
QLD, Australia

TROYMAN wrote:
the back pressure thing is a myth, but you definatly need a mufler to make it sound nicer...


+1

 

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EVL098 wrote:
Cramping in the hand from having it on your Wang for an excessive period of time is a definate con.
Seriously do people google "f**k up modifications for Fords owned by Jews" and get linked straight to this site nowadays?

AU,factory fitted tickford kit/IRS, t5,Sports ryder/KYB: gone.

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 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:35 pm 
Getting Side Ways
Offline

Age: 27

Posts: 584

Joined: 4th Apr 2010

Ride: AU falcon

Location: toongabbie
VIC, Australia

most people go straight thru on 6's

 

_________________

Au factory 5sp, rolling on 20'z, full custom extractors, redback cat and back. has a new motors, only 27,000ks

Welcome to Toongabbie motorsports :P

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 Profile  
 
 
 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:36 pm 
Parts Gopher
Offline

Age: 28

Posts: 79

Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

good. much appreciated everyone who gave me a heads up

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

Top
 Profile  
 
 
 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 10:38 pm 
Getting Side Ways
Offline

Age: 27

Posts: 584

Joined: 4th Apr 2010

Ride: AU falcon

Location: toongabbie
VIC, Australia

still go the supercrap cannon...there straight thru :P

 

_________________

Au factory 5sp, rolling on 20'z, full custom extractors, redback cat and back. has a new motors, only 27,000ks

Welcome to Toongabbie motorsports :P

Top
 Profile  
 
 
 Post subject: Re: Questions/Specifics about my exhaust
Posted: Mon Aug 09, 2010 11:05 pm 
Parts Gopher
Offline

Age: 28

Posts: 79

Joined: 24th May 2010

Ride: 2008 BFII Fairmont Ghia

Location: Greystanes, Western Sydney
NSW, Australia

omg hectic yuleh, while im down there ill grab some neons and a tacho the size of my rims bro!!!
booost!!!!!

lol...i actuall saw two reffos trying to fit a cannon they had just bought from autobarn in blacktown in a maccas carpark the other day...i kid you not, a hammer and a pair of pliers and some tape

 

_________________

Rocky AKA The Tractor- ED Gli head+cam 3.7 limo 2x15' subs - gone but not forgotten
RED-JET - BFII Fairmont Ghia - Under Construction...
Rambo - NCII Fairlane Ghia 5.0l - just a daily runaround...

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