Author Topic: New exhaust for 105 GTV  (Read 665 times)

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Mr Toad

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New exhaust for 105 GTV
« on: May 28, 2017, 03:54:59 PM »
My 105 GTV engine is coming out soon for some long overdue work. I was thinking at the same time of replacing my old and patched standard exhaust with one of the aftermarket SS sports exhausts from England, or a standard exhaust.

Is there any special tuning required or complications likely if I do buy one of the sports exhausts? Any drawbacks that anyone is aware of?

Paul Gulliver

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Re: New exhaust for 105 GTV
« Reply #1 on: May 28, 2017, 05:11:42 PM »
Locally , Vin Sharp makes a very nice set of 105 headers.
Paul Gulliver
Present
2013 Black Giulietta  QV
1979 Silver Alfa 116 GTV Twin Spark
1973 Red Alfa 105 2.0 GTV

Past
2006 Black 159 2.2 J
1970 Dutch Blue Series 2 1750
1975 Blue Alfetta Sedan 1.8
1981 Piper Yellow Alfetta GTV 2000
1985 Red Alfetta GTV 2.0
1989 White Alfa 164
2000 Red Alfa 156 Selespee

Mr Toad

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Re: New exhaust for 105 GTV
« Reply #2 on: May 29, 2017, 09:14:40 AM »
Thanks for that - I'll see what he says.

Craig_m67

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Re: New exhaust for 105 GTV
« Reply #3 on: May 29, 2017, 05:53:57 PM »
I bought the std exhaust from Classic Alfa for my GTJunior, only took three days to get here..
(I only post to as it was both cheaper and faster than a local, for std)
'66 Duetto (lacework of doom)
'73 1600 GT Junior (ensconced)
'03 156 1.9JTD Sportwagon (daily driver)

Colin Byrne

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Re: New exhaust for 105 GTV
« Reply #4 on: May 30, 2017, 07:46:52 AM »
Just remember that whilst stainless steel is nice and shiny and is very resistant to corrosion it is terrible in terms of fatigue life, so if you do go down that route make sure that it is installed and hung correctly because if you don’t it will start cracking before you know it, 105’s are really bad for cracking exhaust systems
As for a “Special Tuning” or added performance, that will all depend on what you do to the engine.  If you just do a stock rebuild a nice set of extractors and a slightly larger exhaust may get you a few extra pony’s but nothing staggering (as the stock headers aren’t actually all that bad).  But if you start mucking around with valves and port sizes, cams and compression, a good set of tunned length extractors and low back pressure exhaust is pretty important to get the most out of the mods. 
As for Carby jetting, again a stock engine rebuild will run fine on the stock jets, and chucking a new exhaust system on shouldn’t change that all that much.  But if you start mucking around with those other engine mods it will definitely require new jetting.
72' 105 2000 GTV Red (tarmac rally/race car)
74' 105 2000 GTV Blue (road car)
68' 105 1600 Giulia Super White (Not sure yet)
01’ Nissan Pathfinder (Tow car/Alfa support vehicle)

Mr Toad

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Re: New exhaust for 105 GTV
« Reply #5 on: September 05, 2017, 09:52:46 AM »
Thank you all - I went for the standard pipes from Classic Alfa. I must say I miss the sound of my much-holed and much-repaired old pipes.