MK3 1.5inch unbalanced header pipes

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turboboy

turboboy

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Hi
Looking for some good quality 1.5 inch unbalanced pipes for MK3 , nice hugging set
Can anyone surgest a supplier.
Cheers
 
I'm thinking Viking, but some here say good things about his pipes and others say differently. I haven't personally made a purchase , but inch and a half are listed on their site.
 
turboboy said:
Hi
Looking for some good quality 1.5 inch unbalanced pipes for MK3 , nice hugging set
Can anyone surgest a supplier.
Cheers
Click to expand...
Hello Turboboy

It could be late to answer your enquiry, but for God's sake, stay away from Viking. In 2004, I spent thousand $ to grab their 1 5/8 ''pipes and muffler set. They looked so good, that I won 1rst prize at INOA rally in Ohio among about 150 competitors. My joy didn't last long as they broke, first the mufflers at the clamp area and later the pipes flush to the cylinder head. After a warranty replacement, the same story happened, my machine shop welded and rewelded the whole thing for hundred $$$until I surrendered and throwed everething in trash. Very nice chrome, but no metal resistance.

Finally I got 1.5'' pipes and mufflers set from RGM. Not as nice like the Viking, a lot cheaper, about 400$, but no problem since (more than 50K miles). A bought 2 other sets for friends when I rebuilded their bikes and complete satisfaction too. It's up to you Turboboy!
 
Well, when I fitted my 1 1/2 pipes and road tested them I was convinced they gave a performance boost.

Sadly it was a classic case of unreliable arse-dyno-itus !

The real dyno showed a big hole in the mid range. Which made it feel strong when coming out of the hole. Even peak BHP was lower as well.

Different engine tunes may get different results though of course.
 
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Fast Eddie said:
Well, when I fitted mine and road tested them I was convinced they gave a performance boost.

Sadly it was a classic case of unreliable arse-dyno-itus !

The dyno showed a big hole in the mid range. Which made it feel strong when coming out of the hole. Even peak BHP was lower as well.

Different engine tunes may get different results though of course.
Click to expand...
When I first built my 750 I had a 2 into 1 exhaust (1 1/2" )with a short open megga
It sounded glorious but on the road it was a disaster, despite all of my best efforts with jetting and timing it just didn't work,or I should say I'm not clever enough to make it work!!
I fitted non balanced downpipes and pea shooters and with no other changes normal service was resumed
 
Fast Eddie said:
Well, when I fitted mine and road tested them I was convinced they gave a performance boost.

Sadly it was a classic case of unreliable arse-dyno-itus !

The dyno showed a big hole in the mid range. Which made it feel strong when coming out of the hole. Even peak BHP was lower as well.

Different engine tunes may get different results though of course.
Click to expand...
The sound from the Viking's 1 5/8 was the most exciting I've ever heard from a Norton. The roar on acceleration and the sniffing on compression were a real addiction for me. I agree that I never observed any performance increase indeed. They looked so good but were so unreliable for the price (2000$). I've always hated the look of the small dia. 70's british bikes. The 60's looked a lot better.
Few years ago, CNW (Matt Rambow) offered a 1 1/2'' stainless exhaust system lined with 1 3/8'' pipes. That was probably the best to keep the Norton performance as you say Steve and to satisfy the look that I wished. Today, I regret to haven't grab one despite they were expensive...they are no longer available...

I've never dyno tested my 1 1/2'' RGM. (Could be interesting that someone does) I do not feel any performance increase either. But the sound and the BEEFIER look is a good compromise for me.

Sergio
 
Sergio, the one‘s I dyno tested were RGM. I’ve still got them under the bench and intend to try them again to see if they work better with a 920.
 
I tried 1-1/2" pipes on my ported 750 streeter and got no improvement. But larger pipes do work on an all out race motor.
 
The 1- 1/2" look very nice.
I agree that the 1 3/8" look a bit wimpy, however it's hard to say no to more power, less weight.
 
I can't argue with the small pipe = better power especially if a dyno supplies the facts. But I much prefer the looks of the larger diameter pipes. My Atlas has stock 1 5/8 pipes and the original mufflers and runs REALLY WELL. The only modifications are a Boyer and a single Mikuni.
While I'm here I need another set of 1 5/8 Atlas pipes for a project. All I need is usable pipes, do not have to be gorgeous.
 
seattle##gs said:
I can't argue with the small pipe = better power especially if a dyno supplies the facts. But I much prefer the looks of the larger diameter pipes. My Atlas has stock 1 5/8 pipes and the original mufflers and runs REALLY WELL. The only modifications are a Boyer and a single Mikuni.
While I'm here I need another set of 1 5/8 Atlas pipes for a project. All I need is usable pipes, do not have to be gorgeous.
Click to expand...
Bigger looks and sounds better.

So are you working out of your garage on all these projects, or actually have a small Brit bike shop in West Seattle?

Anyway, good luck on getting the Atlas pipes. I've been trying to find someone that can make a set 1/5/8ths tracker pipes for my P11, but it is hopeless in the state of Washington. I got a reference from Any Hardan, but I don't think the pipe builder is in business anymore. If he is, he doesn't respond to his business email address. Also got a reference from NYC Norton, but that reference doesn't respond either. Probably because I told him I wasn't willing to ship my bike overseas to have a set of pipes made. If I just had a $3500 pipe bender and knew how to weld. Easy peazy. ;)
 
baz said:
When I first built my 750 I had a 2 into 1 exhaust (1 1/2" )with a short open megga
It sounded glorious but on the road it was a disaster, despite all of my best efforts with jetting and timing it just didn't work,or I should say I'm not clever enough to make it work!!
I fitted non balanced downpipes and pea shooters and with no other changes normal service was resumed
Click to expand...
This is off topic, but I made a 2 into 1 exhaust work on the road on a 750 Norton. It took a while for sure. I had to lengthen it and make the motor breath considerably better. It really likes the 35mm FCR's, and was happy with the 34mm Mikuni's previously. It did not like the 30mm Amals, and neither did I. It's not all roses though. It doesn't sound like a Norton with dual peashooters on it. As configured, it has lost that nice round Norton exhaust note. I miss that sound, but it runs great.

I'm not that clever. I am persistent though.
 
I work out of a small garage. It can get crowded. My project is a Trackmaster frame that was originally designed for a Triumph Triple. I adapted in a
P-11 motor and trans, no easy fit. I fumbled around with different pipe designs but now I want to try the original pipes.
Two days ago I finally took my Goldstar cases down to a place in South Seattle called FLAME SPRAY to get a couple of bearing holes repaired. They build up the hole by blowing in stainless steel and then boring to size. $350 and it looks like a lot of work but I can't assemble the motor with sloppy main bearings. New cases are approx $2000 + shipping from the UK. I will let everyone know how this works out. This could save a lot of motors and gearboxes.
 
Wasn't it Dunstall who stated that best power fot big Norton was 1 1/2 from port, reducing to 1 3/8 inch?
Big exhaust diameter pipes, like the inlet , will inevitably slow the exhaust gas speed down.
 
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