Just stripped my Imola engine for a winter check-up and discovered it has a squish of 2mm!! Picked this engine up in a deal, it had 500 miles on it so I stuck it into my Series 1 and ran it all last year, it`s been faultless, pulls really well and tops out at 75mph GPS. Set-up is Imola(late version) 30mm PHBH, Fresco expansion(works really well), static electronic at 17 degrees.
It had a 0.5mm base gasket and a 0.3mm head gasket on un-matched Spanish casings. So my head tells me to lose the gaskets taking it down to 1.2mm or so (which is what I usually do with my engines) and port the casings to match the kit. My heart says put it back together as it was if it`s not broke,don`t fix it.
Anyone else run similar big squishes? And will there be an appreciable improvement in changing it?
2mm Squish on my Imola..Running fine..Change it?
- Bofs
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Yeh JD you`re probably right but there is always that extra horse or two to be sniffed out
Muffspeed....no muff too tuff
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
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Leave it alone
- Bofs
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Yeh maybe for the best Adam, it`s a stonking engine as is.
Muffspeed....no muff too tuff
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
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my imola has a drop in head so no head gasket, with no base gasket I get 1.2mm squish (which is how I run it) 1500 thrashed miles, never missed a beat (GPS'd @ 82mph) and embarrasses a lot of my mates on TS1's, rapido's, GT's, RT's etc
personally I would try and build it with no gaskets and see what its like, after all it ain't a big issue to stick some gaskets back on if you ain't happy with it is it ?
personally I would try and build it with no gaskets and see what its like, after all it ain't a big issue to stick some gaskets back on if you ain't happy with it is it ?
- Bofs
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What`s the rest of your set-up Padge?
Muffspeed....no muff too tuff
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
Bad Samaritans SC
1957 Zundapp Betta 500 Auto
1966 Motovespa Sprint 210 Polossi
1960 Lambretta Cutdown 205 Project
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186 Imola ultimate (ports cleaned up and casings matched) 30mm PHBH, franspeed supertourer, 5 plate readspead clutch, Augusto 7000 (23 static retarding to 16 degrees), mid weight flywheel , sx200 box 14/46 with GT tensioner (pull down) (5.1 final drive) my settings are in carb set up on here, pulls like a train till around 5,000-5,500 rpm then all hell breaks lose lol. I really need to get it on a dyno coz I would love to know what power its putting out as I also have a quick 210 malossi vespa putting out 21bhp and my imola leaves it standing. even my mates 24bhp TS1struggles to keep up
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I find exactly the opposite, smooth as anything and pulls like a train from tickover and a few people that have riden it describe it as nuts/violent when it really hits the power (and many wont believe it's only 186cc). I've tried a few exhausts ( taffy replica, pm, jl3 etc) and the supertourer has been by far the bestnellyboyo wrote:Its a pain to ride around town a bit though