Post #26
Ok scrap that couldn’t find anything on wossner via Peugeot but managed to find them under Citreon blandy has attached the following image:
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displaying posts 26 to 33 of 33
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| Author | Subject: Compression Ratio |
 blandy
Seasoned Pro  Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
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 Posted 9th Dec 2017 at 21:53
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #27
so a +2.80 cc dome.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 10th Dec 2017 at 00:09
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blandy
Seasoned Pro Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
Post #28
Yeah according to the specs ... would appear I’ll be ending up with 13.39-1 ratio using this calculator (need to cc head still but using 37cc just to get a number) https://www.rbracing-rsr.com/compstaticcalc.html Putting the dome cc in as a -2.8 figure. |
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Posted 10th Dec 2017 at 10:04
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #29
is this for a 2.1 or 2.2 build?________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 10th Dec 2017 at 10:23
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blandy
Seasoned Pro Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
Post #30
2.1 although may go with the 86mm crank if it’ll suit the pistons and rods better - the dry build is to see if i can machine the pistons enough for a sensible comp ratio (hydraulic lifters and catcams 110) |
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Posted 10th Dec 2017 at 11:18
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blandy
Seasoned Pro Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
Post #31
Well done some measuring and by calculations I think the 88mm crank and my piston/rods will be to much compression unless anyone can advise as I’m plugging measurements into a online calculator Basically I have 87mm bore 88mm crank Piston dome 2.8cc Head 37cc (yet to accurately measure) Deck height -1.1mm I was advised by a well know builder to run a 2.2mm cometic headgasket which I also have and that along with a “light skim” of the pistons to bring comp ratio down to a sensible level. Now playing on a calculator before touching anything I get 13.27:1 does this sound correct. I’m yet to have the block/head skimmed yet until all the measurements make 100% sense. Also still have my standard 86mm crank as a worst case scenario |
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Posted 10th Dec 2017 at 15:38
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Day666
Seasoned Pro  Location: Bristol Registered: 20 Apr 2013 Posts: 5,206 Status: Offline |
Post #32
Good luck Michael  Mei is your man for that .... |
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Posted 10th Dec 2017 at 19:12
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blandy
Seasoned Pro Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
Post #33
Thanks - I could just take builders advice and throw it together and hope for the best but I like to check things and as I’ve never built a petrol engine before trying to be cautious |
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Posted 10th Dec 2017 at 19:53
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