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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 25 Dec 2017 :  16:41:41 Show Profile Reply with Quote
The Jetex on my V4 finally let go (in a BIG way) a few weeks back, about 30 miles from home! The RAC managed a bodge to get me home (very noisily!), but it had been on there for about 7 years, so I can't complain!

I decided to investigate getting a custom stainless steel one made. I wanted something that would restore that wonderful V-engine burble, but not as noisy as the Highgate originally fitted to the car. It wasn't cheap, but I'm well pleased with the result:

https://www.youtube.com/watch?v=5YsrYpT6yRo

Rock on!





--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"

Edited by - pchristy on 25 Dec 2017 16:43:38

James Ranaldi
V4 Guru

United Kingdom
1366 Posts

Posted - 27 Dec 2017 :  08:00:11 Show Profile Reply with Quote
Great stuff Pete.

My wife is still wondering what I am laughing about !

Check out the pedestrians as you roar up the hill . . . . . .brilliant.

Cheers
James

1968 V4, LHD
1984 99 GL
1992 C900i Convertible
1993 C900 LPT Convertible
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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 27 Dec 2017 :  10:20:31 Show Profile Reply with Quote
Yes, I spotted him looking as I went up the road! I thought "B****r! Probably the chairman of the noise abatement society!" However, he stopped and spoke to my son, who was wielding the video camera. Turns out he used to be a SAAB mechanic and worked on 2-strokes and V4s back in the day!

Unfortunately, by the time I'd turned round and got back, he'd gone......

--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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v4admin
Forum Admin

United Kingdom
379 Posts

Posted - 27 Dec 2017 :  11:49:00 Show Profile Visit v4admin's Homepage Reply with Quote
Sounds great
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shoestring
Starting Member

25 Posts

Posted - 27 Dec 2017 :  16:36:43 Show Profile Reply with Quote
I would be interested in seeing the system fitted as mine is blowing. Looks like you have twin pipes, like it !

Cheers,

Barry
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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 28 Dec 2017 :  10:57:51 Show Profile Reply with Quote
My son and his family came to visit over Christmas, and out little grand-daughter has managed to leave us all with stinking colds! (Children are *killers*!) As soon as I feel up to it, I'll get out and take some pix and post them here. Essentially, it mimics the Highgate twin system, but with smaller pipes and proper silencers at the rear.

A word of warning though: Custom stainless steel work is not cheap! It is guaranteed for life, however!



--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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TTruckie
V4 Fanatic

United Kingdom
279 Posts

Posted - 28 Dec 2017 :  19:12:33 Show Profile Reply with Quote
HI, It sounds great.

I assume it is twin pipes with a balance cross pipe at about 54"

I need to re-jig the current one on the sonett as it is too noisy at about 3000RPM which is cruise speed. Currently Jetex header and centre resonator splitting into 2 cherry bombs at back.
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stevebod
V4 Fanatic

United Kingdom
300 Posts

Posted - 30 Dec 2017 :  14:59:07 Show Profile Visit stevebod's Homepage Reply with Quote
Sounds great.
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melle
V4 Guru

United Kingdom
2343 Posts

Posted - 30 Dec 2017 :  18:00:45 Show Profile Visit melle's Homepage Reply with Quote
That sounds and looks great Pete! So much better than the ricer-style Jetex tip.

www.saabv4.com
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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 31 Dec 2017 :  14:28:28 Show Profile Reply with Quote
Managed to get out and take some pix of the exhaust today. Sorry if some are slightly blurred, I was trying to take them in the garage - not much room and at a funny angle!

First up showing the off-side rear pipe leading to the silencer (the near side is a mirror image):



You can just see the silencer box through the towing eye. Here it is from another angle:



It tucks up inside the well quite neatly!

Here's the front showing the position of the balance pipe:



And here's the other side:



I've never found any calculations as to the exact positioning of a balance pipe. The only reference I could find was that it should be as close to the headers as possible! I've no idea if that's right or not! But as you can see, its fits quite neatly just in front of the front axle line.

It may just be because of the sound, but the car feels slightly livelier than on the Jetex, and I've been able to go about 1/8 of a turn leaner on the idle mixture.To me, that suggest its slightly more efficient. It may be worth trying slightly leaner main jets in the carb now, but I'll leave that until the weather improves a bit - or until I can find a rolling road at a reasonable price!

For the moment, I'm just enjoying it!





--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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shoestring
Starting Member

25 Posts

Posted - 31 Dec 2017 :  15:22:47 Show Profile Reply with Quote
Thanks for the pictures Pete, is it in 2 inch diameter?

Cheers,

Barry
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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 31 Dec 2017 :  15:37:08 Show Profile Reply with Quote
Closer to 1 3/4" (45mm)



--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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andydeans3
V4 Mad

United Kingdom
986 Posts

Posted - 03 Jan 2018 :  12:24:26 Show Profile Reply with Quote
Pete

I had a stainless, custom job built on my 96 as well, though they brought the pipes together in a "Y" formation, rather than a "T". They said it would aid gas flow.
Photo below.

[url=https://flic.kr/p/224cp7U]

1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro
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melle
V4 Guru

United Kingdom
2343 Posts

Posted - 03 Jan 2018 :  20:11:50 Show Profile Visit melle's Homepage Reply with Quote
Pete's car has twin exhausts with a balance pipe.

www.saabv4.com
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andydeans3
V4 Mad

United Kingdom
986 Posts

Posted - 03 Jan 2018 :  21:25:22 Show Profile Reply with Quote
Ah yes, Melle, you're right. I missed that.

1978 LHD SAAB 96
1978 MGB Roadster
2008 LHD "Classic" Renault Twingo
1991 Nissan Figaro
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pchristy
V4 Guru

United Kingdom
1750 Posts

Posted - 03 Jan 2018 :  23:25:06 Show Profile Reply with Quote
My original 96, back in the late 60s, had a SAH exhaust, which was a two-into-one-back-to-two system. But the nice thing about a twin with a balance pipe is that you get that lovely V-engine "burble".

--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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