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19 Posts Member #: 3103 Member |
7th May, 2010 at 12:44:59pm
Hey,
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 10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
7th May, 2010 at 12:57:40pm
If you can get the compression ratio down to a reasonable level I don't see why not. If something is worth doing, it's worth doing half of. |
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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
7th May, 2010 at 01:04:45pm
On 7th May, 2010 blake12345 said:
Hey, I just wondering if a 1098cc with a 80 thou bore would still be ok for a turbo application? My main concern would be the wall thickness. Thanks Blake the 1098 is a 998 block, they can be bored out to 0.120 ( if thats right) one hundred and twenty thousandths wall thickness shouldnt be a concern at 0.080 (80 thou) getting good enough pistons might be though Yes i moved to the darkside |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
7th May, 2010 at 01:25:49pm
Brett is right, the pistons is the hard bit. The Hypertecs from Aus Minispares look ok, but I'm wary of the slotted design.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
7th May, 2010 at 01:31:40pm
I wonder what custom 1100 pistons from somewhere like listers would cost?
If something is worth doing, it's worth doing half of. |
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 8604 Posts Member #: 573 Formerly Axel Podland |
7th May, 2010 at 01:59:29pm
Minispares are listing the P20951 pistons in +0.080".
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
7th May, 2010 at 02:00:31pm
Easy:
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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8604 Posts Member #: 573 Formerly Axel Podland |
7th May, 2010 at 02:04:00pm
Veg, I think you mean these:
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 1424 Posts Member #: 2810 Formally spanner181187 Dublin, Ireland |
7th May, 2010 at 02:37:29pm
The Omegas are only available in 20 and 60 thou though. Maybe he was knackered 60 thou bores and so needs bigger pistons On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse  On 30th Apr, 2010 Rod S said:
Gary's description is best |
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8604 Posts Member #: 573 Formerly Axel Podland |
7th May, 2010 at 02:51:25pm
Wall thickness wise, I would be happy with 0.120" on a 998 A+ block, having measured it all up in some detail for my K980, short stroke, big overbore build.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
7th May, 2010 at 02:59:00pm
On 7th May, 2010 Paul S said:
Just depends if the cores on the 1098 block are the same as the 998 A+. There is nothing to stop him using a 998 A+ block, plenty cheap ones about still. If something is worth doing, it's worth doing half of. |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
7th May, 2010 at 04:04:51pm
On 7th May, 2010 Paul S said:
Veg, I think you mean these: http://www.swiftune.com/Product/459/omega-...a-flat-top.aspx Yup, of course 
On 7th May, 2010 Paul S said:
Wall thickness wise, I would be happy with 0.120" on a 998 A+ block, having measured it all up in some detail for my K980, short stroke, big overbore build. Just depends if the cores on the 1098 block are the same as the 998 A+. Just stay clear of very early 1100 blocks. These have a thin flange and I've been told that they are infact bored out 850 blocks. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 1497 Posts Member #: 100 Parisien Turbo Expert Paris\' suburb |
7th May, 2010 at 05:23:00pm
in my memory, I mesured lot of bike pistons, don't remember if they was vfr 750, but sure I have mesured a set that were ok, just need to bush rod little end for ful floating pin, and decking of about 1mm, strong and light.
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248 Posts Member #: 7936 Senior Member DK-8450 Hammel. Denmark |
7th May, 2010 at 09:47:27pm
I used to drive a n/a 1098/1187ccm mini using pistons from a fiat panda 965ccm. that is a 67,20mm bore. it put out 85 bhp and i could run it up to 7500 rpm. (i wouldn´t go that high to day)
If i have more toys than you when i die, I WIN |
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 4890 Posts Member #: 1775 Post Whore Chester |
7th May, 2010 at 10:18:12pm
Hypatec Piston from +80 ad up have holes not slots. but they are flat tops.
I run a supercharger and I don't care the TB is on the wrong side.
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1424 Posts Member #: 2810 Formally spanner181187 Dublin, Ireland |
7th May, 2010 at 10:35:38pm
On 7th May, 2010 gr4h4m said:
Hypatec Piston from +80 ad up have holes not slots. but they are flat tops. http://www.minisport.com.au/category5_1.htm I believe that is only the case with 998 pistons though. I don't think Hypatec do 1098 pistons above 60 thou On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse On 30th Apr, 2010 Rod S said:
Gary's description is best |
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4890 Posts Member #: 1775 Post Whore Chester |
7th May, 2010 at 10:48:39pm
sorry I thought the talk was about 998 pistons.
Edited by gr4h4m on 7th May, 2010. I run a supercharger and I don't care the TB is on the wrong side.
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1424 Posts Member #: 2810 Formally spanner181187 Dublin, Ireland |
7th May, 2010 at 10:51:43pm
Yeah, same bore different stroke. As they use the same block and rods, the 1098 pistons have a 3.53mm (I think) shorter deck height to stop them sticking out the top of the block On 12th Nov, 2009 Paul S said:
I think Gary OS has taken over my role as the forum smart arse On 30th Apr, 2010 Rod S said:
Gary's description is best |
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19 Posts Member #: 3103 Member |
8th May, 2010 at 02:02:55am
Hey thanks for replys. So the wall thickness wouldnt be a problem it would be the piston choices available? I have a 998 block sitting here but i think it will need either a BIG bore or it wont be any good. But yeh ive just finished running in my 1172 and it is making around 70hp @ crank and im just wanting more! So i thought if it was worth turboing i would considering pulling it out and changing things but yeh how do i know what my compression ratio is? I know i have 175PSI in engine piston i dunno if that would help me find out compression ratio.
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1497 Posts Member #: 100 Parisien Turbo Expert Paris\' suburb |
8th May, 2010 at 06:49:57am
Even if not interested, you could put that part number here , this will certainly be usefull for someone in future, will be part of turbomini database, with his usefull search function. On 7th May, 2010 TurboTom said:
I used to drive a n/a 1098/1187ccm mini using pistons from a fiat panda 965ccm. that is a 67,20mm bore. it put out 85 bhp and i could run it up to 7500 rpm. (i wouldn´t go that high to day) if you are interested i can give you the Mahle sparepart no. |
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 1137 Posts Member #: 1450 Post Whore Near Paris - France |
3rd Jun, 2010 at 01:39:17pm
As well as the VFR piston part number Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
3rd Jun, 2010 at 01:45:03pm
On 8th May, 2010 blake12345 said:
175PSI in engine piston i dunno if that would help me find out compression ratio. Thanks Blake i have not seen him since this thread but thats 11.1 cr a little too hight for boost
Yes i moved to the darkside |
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