1800 Bore
-
ssshannah
- Enlisted
- Posts: 25
- Registered for: 6 years 1 month
1800 Bore
Hi guys. Id would like some clarity regarding the 1800 - 1900 conversion. I know the pistons I need to get is the Kombi 2.3 pistons (83.5mm) and need to skim the pistons 1.5mm because they are taller. I would like to find out how much bore should I have for 83.5mm pistons to fit?
-
Saiendra
- Criminal Troll.
- Posts: 1889
- Registered for: 11 years 2 months
- Car Make: VW
- Car Model: 2019 Polo Vivo 1.4 C/Line
- Location: Gauteng, South Africa
Re: 1800 Bore
What block are you using to start the conversion?
Daily - Limestone Grey 2019 Volkswagen Polo Vivo 1.4 Comfortline.
-
panic-mechanic
- Panic's Place
- Posts: 26715
- Registered for: 21 years 8 months
- Membership No: 79
- Location: Benoni, putfontein.
Re: 1800 Bore
not entirely sure what the question is. You need 83.5 mm bore to fit a 83.495 mm piston...
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10
Perfect Power dealer. I do dyno tuning.
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10
Perfect Power dealer. I do dyno tuning.
-
PapaJo
- Brigadier
- Posts: 6990
- Registered for: 14 years
- Car Make: VW's
- Car Model: '16 7R, '86 Caddy AUM 20VT
- Membership No: missing
- Location: Meyerton or Offshore Guyana.
Re: 1800 Bore
Panic answered your question.
Why don't you get 2.6 combi pistons as they will sit flush in the block, with only the squish pad sticking out. You are planning to do this to a 1800 8V block with 1800 crank and std 1800 rods.
Why don't you get 2.6 combi pistons as they will sit flush in the block, with only the squish pad sticking out. You are planning to do this to a 1800 8V block with 1800 crank and std 1800 rods.
-
ssshannah
- Enlisted
- Posts: 25
- Registered for: 6 years 1 month
-
ssshannah
- Enlisted
- Posts: 25
- Registered for: 6 years 1 month
Re: 1800 Bore
I've read that in order to have a true 1900 motor you need to use 83.5 mm pistons kombi pistons. so my question is what Bore should the block be machined to fit 83.5mm pistons?panic-mechanic wrote: ↑Mon Jul 15, 2019 7:48 pm not entirely sure what the question is. You need 83.5 mm bore to fit a 83.495 mm piston...
-
ssshannah
- Enlisted
- Posts: 25
- Registered for: 6 years 1 month
Re: 1800 Bore
Also is it worth going 1900 while still running Carburator? and how much power will i get from going FI?
-
PapaJo
- Brigadier
- Posts: 6990
- Registered for: 14 years
- Car Make: VW's
- Car Model: '16 7R, '86 Caddy AUM 20VT
- Membership No: missing
- Location: Meyerton or Offshore Guyana.
Re: 1800 Bore
Please, Read panic’s statement again.ssshannah wrote: ↑Wed Jul 17, 2019 4:22 pmI've read that in order to have a true 1900 motor you need to use 83.5 mm pistons kombi pistons. so my question is what Bore should the block be machined to fit 83.5mm pistons?panic-mechanic wrote: ↑Mon Jul 15, 2019 7:48 pm not entirely sure what the question is. You need 83.5 mm bore to fit a 83.495 mm piston...
Block gets bored to 83,5mm to fit the 83,495mm pistons. That leaves you with piston to block clearance of 0,005mm.
You cannot bore piston and block to the exact same size. The thermal expansion properties of the piston and block can be different and that is why clearance is required.
Buy the (83,5mm referring to bore size in block) pistons and on the box it comes in, it will give the piston size, clearance value en then the engineering shop will know exactly what size to bore the block to. No rocket science required