Cossie
Member
Registered: 17th May 02
User status: Offline
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best way to find out compression is to mount the x16xe crank with the x18xe pistons and crank in the 1,8 block and using a pipet to find volume, btw x16xe head cc is around 33.6cc
[Edited on 01-06-2009 by Cossie]
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crazybrightman
Member
Registered: 30th Mar 09
Location: leicestershire
User status: Offline
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hone it yourself a honing tool is less than £20.
and that list makes more sense whats wrong with the current 1800 pistons though?
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Cossie
Member
Registered: 17th May 02
User status: Offline
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and use this
http://www.csgnetwork.com/compcalc.html
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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quote:
Originally posted by crazybrightman
hone it yourself a honing tool is less than £20.
Hell yeah, oval bores FTW 
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RCS
Member
Registered: 26th Jan 05
Location: Lichfield/Dundee
User status: Offline
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quote:
Originally posted by Robin
quote:
Originally posted by crazybrightman
hone it yourself a honing tool is less than £20.
Hell yeah, oval bores FTW
Hardly 
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DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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I'm not doing it myself with a drill hone attachment lol! I want round, true bores.. Its going to cost me £30 to have the bores de-glazed and checked for 'round', if the block is good I'll start the build 
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DizzyRebel
Member
Registered: 2nd Jan 09
Location: Lincoln
User status: Offline
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I cant see this working, everything is going to have to be custom for it with plenty of guesswork involved. The management alone is going to cost over a grand if you want it to work properly.
Surely it just makes more sense to buy a LET in the first place?
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RCS
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Registered: 26th Jan 05
Location: Lichfield/Dundee
User status: Offline
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quote:
Originally posted by DaveyLC
I'm not doing it myself with a drill hone attachment lol! I want round, true bores.. Its going to cost me £30 to have the bores de-glazed and checked for 'round', if the block is good I'll start the build
Honing won't affect the roundess of your bores, its a finishing process.
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craig_s
Member
Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
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as rcs says all honing does it put cross hatches in the bores for the pistons to bed into.
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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Those honing tools are pants, you can never replicate the finish from one bore to another because your arm doesn't move in a uniform motion like a proper boring machine.
If you have the drill at a slight angle, it WILL oval the bore.
For the sake of £30/40 a bore, it's best to get it done properly tbh, no point in messing around.
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RCS
Member
Registered: 26th Jan 05
Location: Lichfield/Dundee
User status: Offline
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quote:
Originally posted by Robin
Those honing tools are pants, you can never replicate the finish from one bore to another because your arm doesn't move in a uniform motion like a proper boring machine.
If you have the drill at a slight angle, it WILL oval the bore.
For the sake of £30/40 a bore, it's best to get it done properly tbh, no point in messing around.
What? The tool is spring loaded to follow the shape of the bore  All you have to do is not stop the drill when you have it inside the cylinder!
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Those tools are rubbish.. Its going to cost me £30 to get all four bores done professionally and checked with a bore-gauge..
quote:
Originally posted by DizzyRebel
I cant see this working, everything is going to have to be custom for it with plenty of guesswork involved. The management alone is going to cost over a grand if you want it to work properly.
Surely it just makes more sense to buy a LET in the first place?
Nothing "needs" to be custom other than the mangement?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
User status: Offline
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Megasquirt DIY management
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Theres pleanty of "cheap" options for management 
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
User status: Offline
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I have a dream that oneday I will run a car on my own DIY management
It'll never ever happen
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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You could make your own distributor and points?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
User status: Offline
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LOL I've got more chance programming a thin client as an ECu tbh
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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quote:
Originally posted by crazybrightman
whats wrong with the current 1800 pistons though?
Sorry missed that bit
The XE1 pistons are not forged or treated, I'm lead to believe the Z18XER pistons are forged.
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DizzyRebel
Member
Registered: 2nd Jan 09
Location: Lincoln
User status: Offline
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quote:
Originally posted by DaveyLC
Those tools are rubbish.. Its going to cost me £30 to get all four bores done professionally and checked with a bore-gauge..
quote:
Originally posted by DizzyRebel
I cant see this working, everything is going to have to be custom for it with plenty of guesswork involved. The management alone is going to cost over a grand if you want it to work properly.
Surely it just makes more sense to buy a LET in the first place?
Nothing "needs" to be custom other than the mangement?
Custom exhaust and inlet manifolds and exhaust system, Cam will probably need re-profiling to get the right corrected compression ratio too. Also your looking at £500 for a useful ECU and then another £500 minimum for a custom map to be made for it.
Sounds like a shit load of cost for something that might not even work. I also think the rods and throw on the crank will probably lower the CR too much, without working it out myself but 1mm off the rod length plus a shorter throw on the crank will serve to lower compression a shit load.
Your best off just putting a low boost turbo on a standard 1800 if you must have a turbo 1800, otherwise a let will be less problematic less cost and more powerful.
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gez bay
Member
Registered: 14th Feb 08
Location: South Wales drives: Vxr
User status: Offline
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a let will be less problematic less cost and more powerful.
thats the easy way out 
1.8T ftw!
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Rod length isnt being touched.. It will just be de-stroked creating an over-square engine which should make it more reliable.
The displacement is reduced by nearly 10% and the combustion chamber volume is staying the same so you would expect the CR to drop by the same which would give about 9.5:1 a little high if anything.
Custom inlet and manifold arent an issue, I'll make them myself.. The only killer costs for me are the pistons and the management..
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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quote:
Originally posted by gez c16b
a let will be less problematic less cost and more powerful.
thats the easy way out
1.8T ftw!
ZLET is the only big block engine I would ever consider, but I dont want big block, too heavy..
If I was going to buy "off the shelf" so to speak I'd hold out for a Corsa D VXR/SRI engine.
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gez bay
Member
Registered: 14th Feb 08
Location: South Wales drives: Vxr
User status: Offline
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yeah and the 1.8T will de different, i quoted wrong too , looks like i said a let will be better. i'd do the 1.8
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Ahh Sorry
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gez bay
Member
Registered: 14th Feb 08
Location: South Wales drives: Vxr
User status: Offline
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no worries mate, my fault
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