displaying posts 1 to 11 of 11

Author Subject: 87mm pistons
thelegendofando

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Location: Lincoln

Registered: 24 May 2011

Posts: 137

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Post #1
I'm getting really confused over bore sizes and I suspect the answer is simple.

I've bought some 87mm wossner pistons, is it the bore that is 87mm or the actual piston?

In other words, what do I tell my engineer to bore it out to?

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205 GTi6 - work in progress
Posted 23rd Jul 2011 at 00:16
bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,752

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Post #2
Give the piston and the block to the engineer he will do the rest Wink
Posted 23rd Jul 2011 at 00:18
thelegendofando

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Location: Lincoln

Registered: 24 May 2011

Posts: 137

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Post #3
I did but then he shouted at me for not knowing what size to bore it to :s

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205 GTi6 - work in progress
Posted 23rd Jul 2011 at 00:29
marksorrento205

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Location: Airborne in the lanes

Registered: 26 Aug 2008

Posts: 2,221

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Post #4
Surely he should know or be able to find out the limits and clearances etc? If not maybe try somewhere else?

Try pm'ing Pete. He is in Stoke and has had the same work done. click here to pm him



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Posted 23rd Jul 2011 at 00:47
thelegendofando

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Location: Lincoln

Registered: 24 May 2011

Posts: 137

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Post #5
Well he said he will try and find a spec sheet for them and let know on moday, so I'll wait until then. Just wanted to know if its the incredibly obvious 87mm or if I'm missing something.

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205 GTi6 - work in progress
Posted 23rd Jul 2011 at 01:02
maddriver9

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Location: nr leek

Registered: 12 Mar 2008

Posts: 341

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Post #6
were you having it done i had mine done at Dave rushton in smallthorne an he worked it out it's all to do with how much the piston expands wen hot the skirt expands less than the top of the piston due to material been different thickness's.

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178bhp 205gti6
¼ mile in 14.2
Posted 23rd Jul 2011 at 01:15
thelegendofando

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Location: Lincoln

Registered: 24 May 2011

Posts: 137

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Post #7
I'm having it done at Dave Rushtons lol yeah he said all of that but I'm a good customer of his so he likes to give me some stick when I get something wrong! I originally told him to bore it to 87mm but then I got confused about if the pistons were 87 or the bore was 87.

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205 GTi6 - work in progress
Posted 23rd Jul 2011 at 02:14
allanallen

Seasoned Pro

Location: Buxton

Registered: 01 May 2007

Posts: 1,399

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Post #8
I would imagine it's for an 87mm bore, the piston should measure a bit smaller.

This should be fairly obvious to an engine machinist?!

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Posted 23rd Jul 2011 at 02:15
dav1

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Location: leek/staffs

Registered: 20 Jun 2011

Posts: 312

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Post #9
I had mine done there, he did good job.

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230bhp 205 gti6
Posted 23rd Jul 2011 at 03:25
thelegendofando

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Location: Lincoln

Registered: 24 May 2011

Posts: 137

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Post #10
dav1, you keep appearing in my threads! it's a bit creepy Razz

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205 GTi6 - work in progress
Posted 23rd Jul 2011 at 03:30
dav1

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Location: leek/staffs

Registered: 20 Jun 2011

Posts: 312

Status: Offline

Post #11
that's cus I done it all before you.Smile

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230bhp 205 gti6
Posted 23rd Jul 2011 at 03:45

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