Wed Jun 09, 2021 4:46 am

Ossessionato
VSX, Stella 177, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3177
Location: Staten Island, NY
 
Ossessionato
VSX, Stella 177, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3177
Location: Staten Island, NY
Wed Jun 09, 2021 4:46 am linkquote
The sales pitch is quite hilarious on this one:

https://scooterlab.uk/60bhp-egig-zero-g-407cc-kit-for-vespa-and-lambretta-news/

Just waiting for the first build thread on here so o can live vicariously through someone else!
Wed Jun 09, 2021 8:18 am

Enthusiast
PK50XL,PK100S,ET3
Joined: 26 Aug 2020
Posts: 70
Location: UK
 
Enthusiast
PK50XL,PK100S,ET3
Joined: 26 Aug 2020
Posts: 70
Location: UK
Wed Jun 09, 2021 8:18 am linkquote
Its quite mad that its 'one size fits all'.

I bet the Lambretta one costs twice as much as the Vespa ones.
Wed Jun 09, 2021 3:37 pm

Addicted
PX 150
Joined: 15 Sep 2006
Posts: 541
Location: Gold Coast, Australia
 
Addicted
PX 150
Joined: 15 Sep 2006
Posts: 541
Location: Gold Coast, Australia
Wed Jun 09, 2021 3:37 pm linkquote
These kits are phenomenal but the biggest problem with the large CC Cylinders is that the cooling fin area is drastically reduced to fit under the the same cowl and frame dimension. Good for sprinting and short bursts.
But heat soak is inevitable and cooling is compromised. Long touring becomes a juggle between drastically retarding the timing and reducing compression ratios.

Water cooled is the only way to go here but this becomes complex and truly takes away from the simplicity/joy of the original design.
Wed Jun 09, 2021 3:41 pm

Ossessionato
VSX, Stella 177, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3177
Location: Staten Island, NY
 
Ossessionato
VSX, Stella 177, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3177
Location: Staten Island, NY
Wed Jun 09, 2021 3:41 pm linkquote
jimscoot wrote:
These kits are phenomenal but the biggest problem with the large CC Cylinders is that the cooling fin area is drastically reduced to fit under the the same cowl and frame dimension. Good for sprinting and short bursts.
But heat soak is inevitable and cooling is compromised. Long touring becomes a juggle between drastically retarding the timing and reducing compression ratios.

Water cooled is the only way to go here but this becomes complex and truly takes away from the simplicity/joy of the original design.
Excellent description... I've been wondering lately what the practical limit for effective cooling on a Vespa engine is in terms of tuning upgrades. I can definitely understand if this one exceeds it for anything but Dyno runs and flat track drag races.
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