Best exhaust to use?
OP
Pazza68
Fri, 13 May 2022 18:31:47 +0000
Lurker
1971 Vespa 150 sprint
Joined: Thu, 03 Mar 2022 19:20:53 +0000
Posts: 4
Location: Wirral
 
OP
Pazza68
Lurker
1971 Vespa 150 sprint
Joined: Thu, 03 Mar 2022 19:20:53 +0000
Posts: 4
Location: Wirral
Fri, 13 May 2022 18:31:47 +0000 quote
Hi all. I have a 150 sprint veloce. Im putting a pinasco 177cc kit on it. A pinasco race crank and flytech flywheel. What's people's recommendations on a decent exhaust to use? stainless steel if possible. Thanks in advance.
scooterist
Sun, 15 May 2022 01:24:33 +0000
Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: Mon, 04 Jul 2011 21:54:36 +0000
Posts: 1398
Location: Tucson, AZ
 
scooterist
Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: Mon, 04 Jul 2011 21:54:36 +0000
Posts: 1398
Location: Tucson, AZ
Sun, 15 May 2022 01:24:33 +0000 quote
I have a 71 sprint Veloce. I tried the following on my Sprint Veloce:

1) Stock (Also the smallest in size along the Malossi)
2) Sito plus (very large and bulky with poor clearance but decent performance. Noisy)
3) Polini box (10-15% larger in size than the Malossi or stock).
4) Malossi box (the smallest in size, very compact). Noisy deep
5) SR3(SIP road 3), same size as the Polini. Not too well design because the elbow hits the ground
6) Lefty Boomstick. it clears very well under the left cowl

For power the absolute best was the SR3. I tested it over and over and over with two GPS, a tachometer and a acceleration instrument device(Dragy).

The SR3 is just well above the rest in power/torque. The second best was the Polini closely followed by the Malossi. Although the top speed did not change much the acceleration improvement was significant.



GeekLion
Sun, 15 May 2022 07:42:55 +0000
The Dude
Too Many piles of Junk that need too much work and too much money
Joined: Mon, 06 May 2019 08:34:14 +0000
Posts: 1600
Location: PNW from LBC
 
GeekLion
The Dude
Too Many piles of Junk that need too much work and too much money
Joined: Mon, 06 May 2019 08:34:14 +0000
Posts: 1600
Location: PNW from LBC
Sun, 15 May 2022 07:42:55 +0000 quote
I'm happy to see your in use exhaust comparison, and it also makes me sad to see the Vespas tipped over on the ground.
scooterist wrote:
I have a 71 sprint Veloce. I tried the following on my Sprint Veloce:

1) Stock (Also the smallest in size along the Malossi)
2) Sito plus (very large and bulky with poor clearance but decent performance. Noisy)
3) Polini box (10-15% larger in size than the Malossi or stock).
4) Malossi box (the smallest in size, very compact). Noisy deep
5) SR3(SIP road 3), same size as the Polini. Not too well design because the elbow hits the ground
6) Lefty Boomstick. it clears very well under the left cowl

For power the absolute best was the SR3. I tested it over and over and over with two GPS, a tachometer and a acceleration instrument device(Dragy).

The SR3 is just well above the rest in power/torque. The second best was the Polini closely followed by the Malossi. Although the top speed did not change much the acceleration improvement was significant.
Moto64
Sun, 15 May 2022 10:19:35 +0000
Molto Verboso
'64 Motovespa 150S (177) , '66 Allstate SF, '65 VBB, '66 180SS
Joined: Thu, 28 Mar 2013 02:39:40 +0000
Posts: 1532
Location: S.Salem, NY
 
Moto64
Molto Verboso
'64 Motovespa 150S (177) , '66 Allstate SF, '65 VBB, '66 180SS
Joined: Thu, 28 Mar 2013 02:39:40 +0000
Posts: 1532
Location: S.Salem, NY
Sun, 15 May 2022 10:19:35 +0000 quote
GeekLion wrote:
I'm happy to see your in use exhaust comparison, and it also makes me sad to see the Vespas tipped over on the ground.
They're just tired. Who is the guy behind the curtain ?
Jack221
Sun, 15 May 2022 11:15:41 +0000
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 3890
Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 3890
Location: London UK
Sun, 15 May 2022 11:15:41 +0000 quote
Pazza68 wrote:
Hi all. I have a 150 sprint veloce. Im putting a pinasco 177cc kit on it. A pinasco race crank and flytech flywheel. What's people's recommendations on a decent exhaust to use? stainless steel if possible. Thanks in advance.
Which pinasco kit? What crank stroke? What carb/inlet type? What type of riding you want to do?
Jack221
Sun, 15 May 2022 11:20:59 +0000
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 3890
Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 3890
Location: London UK
Sun, 15 May 2022 11:20:59 +0000 quote
scooterist wrote:
I have a 71 sprint Veloce. I tried the following on my Sprint Veloce:

1) Stock (Also the smallest in size along the Malossi)
2) Sito plus (very large and bulky with poor clearance but decent performance. Noisy)
3) Polini box (10-15% larger in size than the Malossi or stock).
4) Malossi box (the smallest in size, very compact). Noisy deep
5) SR3(SIP road 3), same size as the Polini. Not too well design because the elbow hits the ground
6) Lefty Boomstick. it clears very well under the left cowl

For power the absolute best was the SR3. I tested it over and over and over with two GPS, a tachometer and a acceleration instrument device(Dragy).

The SR3 is just well above the rest in power/torque. The second best was the Polini closely followed by the Malossi. Although the top speed did not change much the acceleration improvement was significant.
How did the jetting differ between these exhausts? An exhaust with more pull will require an up jet. That exhaust with no upjet will be under its best.
Birdsnest
Sun, 15 May 2022 13:26:09 +0000
Not So Moderator
VNB VSC o9c VMA vbc vmb VSX
Joined: Wed, 28 May 2008 17:31:07 +0000
Posts: 7028
Location: Hustletown, TX
 
Birdsnest
Not So Moderator
VNB VSC o9c VMA vbc vmb VSX
Joined: Wed, 28 May 2008 17:31:07 +0000
Posts: 7028
Location: Hustletown, TX
Sun, 15 May 2022 13:26:09 +0000 quote
Moto64 wrote:
They're just tired. Who is the guy behind the curtain ?
He's pretty excited to be there whoever he is.
Positive
koenig blues
Mon, 16 May 2022 13:27:08 +0000
Veni, Vidi, Posti
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: Mon, 15 Jun 2009 15:12:19 +0000
Posts: 5794
Location: Indo
 
koenig blues
Veni, Vidi, Posti
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: Mon, 15 Jun 2009 15:12:19 +0000
Posts: 5794
Location: Indo
Mon, 16 May 2022 13:27:08 +0000 quote
Not me either, i am to busy making my own big box exhaust



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