can you bore a 1.8 zetec bottom end to accept 2 litre piston
08-01-2005, 03:14 PM
#1
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can you bore a 1.8 zetec bottom end to accept 2 litre piston
s? and are the rods the same?as all the us uprated zetec stuff seems to be for 2litre and i found a cheap 1.8,so,is this ok to do?cheers.
08-01-2005, 03:17 PM
#2
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nope..
2 litre block has siamesed bore castings to allow room for the additional 5mm of bore diameter, 1.8L block hasn't, there's just not enough bore thickness to allow that much overbore.
2 litre block has siamesed bore castings to allow room for the additional 5mm of bore diameter, 1.8L block hasn't, there's just not enough bore thickness to allow that much overbore.
08-01-2005, 03:18 PM
#3
just finding my feet
there was a post about the a few years ago, somink to do with the side walls on a 1.8 are alot thinner if ya do
think its proved cause ya gotta weld a bit of extra ally on the cvh head to fot a 2.0 zetec bottom end but on a 1.8 ya dont have to
hope that helps, oh and 2.0 zetec engines are fooking cheep anyway tbh
, i can get a compelate one for 200 quid 
think its proved cause ya gotta weld a bit of extra ally on the cvh head to fot a 2.0 zetec bottom end but on a 1.8 ya dont have to
hope that helps, oh and 2.0 zetec engines are fooking cheep anyway tbh
, i can get a compelate one for 200 quid
08-01-2005, 03:22 PM
#4
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how about 50 for the 1.8 im gettin?heheh!more cheapness!oh well,just means ill run less boost,still be a quick mofo cheap motor! worked out yesterday ill be lookin at about 900-950 quid for the whole lot! thats200+zvh bhp VERY light(polycarbonate windows,stripped everything) 17 inch rims,slightly bigger brakes,quality track car!
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08-01-2005, 03:33 PM
#8
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yeah,also heard you can get audi pistons in there?exactly which audi though?hmmm... think its the ur turbo model. but 15 psi should see me goin fairly quick on shot peened bottom end with skimmed pistons or decomp plate!
08-01-2005, 03:40 PM
#9
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how far do you get the pistons skimmed by the way?anyone know what this costs?and by who?i know of one company thatll prob do it(oselli racing) local to me but anyone else had it done?
08-01-2005, 04:28 PM
#14
just finding my feet
Originally Posted by big_wig_074
aint got msn,but im sure ill get hold of him at some point!
get it chappy mate, ya dont know what ya missing out on
08-01-2005, 04:41 PM
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Alright Greg, as Rich quiet rightly pointed out, you cant use 2ltr sized pistons.
Assuming a ZVH, on a 1.8 bottom end, STD zetec pistons give about 8.3:1.
Skim them 40thou gives about 7.8:1
Im not sure what id do now on a 1.8.......waste of money using propper poistons, id do a 2ltr if you want a PROPPER zvh.
Maybe look at using a decompression plate? Theyre wank IMO, but people seem to sue them and get on ok!.
Assuming a ZVH, on a 1.8 bottom end, STD zetec pistons give about 8.3:1.
Skim them 40thou gives about 7.8:1
Im not sure what id do now on a 1.8.......waste of money using propper poistons, id do a 2ltr if you want a PROPPER zvh
. Maybe look at using a decompression plate? Theyre wank IMO, but people seem to sue them and get on ok!.
08-01-2005, 04:58 PM
#18
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i aint gonna set the world on fire here,just want reliable useable 200+bhp for a fun weekend track 1/4 car until i pay off my debts then i will buy summit really quick,cossie or ur quattro! 
1.8 should get me over 200 i woulda thought! how far do ya skim pistons then phil?
1.8 should get me over 200 i woulda thought! how far do ya skim pistons then phil?
08-01-2005, 05:02 PM
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Personally if its just a cheerfull build I'd use a Ferriday plate. (Copper). I skimmed my 1,8 pistons 40thou.
Reminds me actually im gunna put my old 1.8zvh block on ebay...
Reminds me actually im gunna put my old 1.8zvh block on ebay...
08-01-2005, 05:30 PM
#21
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Big Wig..
If you go ZVH, at 8.3:1 compression you shouldn't have a problem IMO. The (relatively weak cast) pistons will be stronger left as they are, and I can't see the benefit of reducing the CR further.. 15psi or so boost should see you to 200bhp.
If you go ZVH, at 8.3:1 compression you shouldn't have a problem IMO. The (relatively weak cast) pistons will be stronger left as they are, and I can't see the benefit of reducing the CR further.. 15psi or so boost should see you to 200bhp.
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