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| TUF250 |
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Hi all, i just did a twin system on my fairlane which drops at the diff, sounds fantastic but its not that loud. i love the note but even at full throttle its relatively quiet. will putting GT40p heads on make it alot louder as i have heard the e7s cut alot of the noise out. im actually suprised as to how quiet it is
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| EBXR8380 |
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Umm ?? Extractors would.. Depends on mufflers..
Heads & inlet would help... From AU on..
_________________ As in ZOOM 126 edition |
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| TUF250 |
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its a proper exhaust, EL GT extractors, high flow cats, 2.25 pipes with straight through mufflers
it sounds fantastic but its not that loud, i heard someone once say that the head design has a huge amount to do with the sound and loudness of an exhaust note, was jsut wondering what would change by changing over to the AU heads |
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| Ausman |
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if they are strait through fibreglass packed mufflers (like i have on both my xr8's) then give them time and they will get louder. i've had the system on my el for about 3-4 weeks and its still settling.
if ur Q is more about why heads change the sound of a car, well probly a number of factors like compression ratio change, chamber design, valve sizes and port lengths. |
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| TUF250 |
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ah ok, thanks mate, i suppose i was supprised that the car wasnt as loud as my old car, wwas wondering the the style of the GT40P heads was louder that the E7 ones?
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| banarcus |
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What sort of mufflers did you get fitted, size etc?
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| TUF250 |
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the system is basically el gt extractors with high flow cats, the pipes are twin 2.25 press bent with a crosspipe. twin straight through mufflers dumped before the diff. i dont htink the mufflers are overly expensive ones
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| banarcus |
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I only ask because I'm re-visiting my dual setup again. What brand mufflers ie Lukey, Redback, Supercat etc and what size are the mufflers? If you don't mind, can you get a tape measure under there for me and see how long and wide they are? cheers
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| NCIILANE |
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Your system sounds almost identical to mine except I didn't fit mufflers at all, just a few hotdogs
 And mine is pretty loud. I also have E7's, so I don't think that is what is keeping yours quiet.I actually had to fit a third pair of hotdogs because it was too loud  That is the only difference between your system and mine........mufflers!Cheers, Mick
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| Craney |
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TUF250 wrote: its a proper exhaust, EL GT extractors, high flow cats, 2.25 pipes with straight through mufflers it sounds fantastic but its not that loud, i heard someone once say that the head design has a huge amount to do with the sound and loudness of an exhaust note, was jsut wondering what would change by changing over to the AU heads Be careful when buying your GT40Ps that the spark plug angle doesnt make your ELGT extractors redundant. I have a 5.0 EL Ghia that I recently bought Pacemaker PH4001 headers for only to find that there was no way I could fit them based on both the plug angle and engine bay clearance. I was luck to sell them for what they cost me so I could get a set of PH4000 headers which will go on next week 
_________________ '97 V8 EL Ghia Webasto 400 sunroof, Tint, Parnell VSI LPG, UPC 330mm brake upgrade (drilled), Pacemaker twin system, T5 conversion (Billet Products shifter) |
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| TickXR |
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I'm pretty sure the EL GT had GT40's on them didn't they?
_________________ If you don't do it whilst your livin, you aint got no bloody chance when your dead!!! |
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| jaysway |
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TickXR wrote: I'm pretty sure the EL GT had GT40's on them didn't they? gt40 or gt40p? was the only difference between these 2 heads the spark plug angle? |
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| One Drone |
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Easiest way to get noise is exhaust. Next is the cam. Grumpy has big lobe separation.
_________________ There are 10 types of people in this world. |
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| Craney |
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jaysway wrote: TickXR wrote: I'm pretty sure the EL GT had GT40's on them didn't they? gt40 or gt40p? was the only difference between these 2 heads the spark plug angle? Interesting. Which one has the spark plug angle that is different to the E7? And which one was in the ELGT?
_________________ '97 V8 EL Ghia Webasto 400 sunroof, Tint, Parnell VSI LPG, UPC 330mm brake upgrade (drilled), Pacemaker twin system, T5 conversion (Billet Products shifter) |
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| Steady ED |
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EB GT, ED XR8 Sprint and EL GT had GT40s, which have the same plug angle as E7s.
FBT got GT40Ps, which have the difficult plug angle.
_________________ ED XR8 Sprint - S-Trim, V500, 249rwkw |
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