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 171 Posts Member #: 621 Advanced Member nsw austalia |
17th Feb, 2010 at 06:10:13am
Motor came out last year due to it started blowing smoke and running rough, still made good power but diceded to pull it out to make sure there was no issues , first thought was that maybe a circlip had poped out but it was a different story . only just pulled engine apart this week, and it seems i have broken the ring land on pistons 3 and 4 betweet the top rings.
1152cc turboed mini clubman, most powerful 1.1L a-series?
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
17th Feb, 2010 at 07:23:23am
I'm not sure if anyne else uses these pistons forced induction?
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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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
17th Feb, 2010 at 07:49:18am
I've got these fitted in my 1100T, but I haven't run it yet. How much boost were you running? 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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Forum Mod  5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
17th Feb, 2010 at 08:15:33am
On 17th Feb, 2010 Vegard said:
I've got these fitted in my 1100T, but I haven't run it yet. How much boost were you running? I was considering these too. Has anyone ever used one compression ring only on turbo? Paul I seriously doubt it! |
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171 Posts Member #: 621 Advanced Member nsw austalia |
17th Feb, 2010 at 08:57:34am
On 17th Feb, 2010 wil_h said:
I'm not sure if anyne else uses these pistons forced induction? What boost/CR/turbo are you using? boost was 15psi compression was 8.3:1 ish turbo is gt2554r engine was making 165hp and has done around 25,000km without being pulled apart so i think did very well, what would cause that ring land to break? 1152cc turboed mini clubman, most powerful 1.1L a-series?
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 8604 Posts Member #: 573 Formerly Axel Podland |
17th Feb, 2010 at 09:19:35am
As far as I am aware, the 1100 Hypatec pistons are standard replacement items with oil drain slots. They are not the high performance items that are available for the 998s with drilled oil drains. Please correct me if I am wrong.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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171 Posts Member #: 621 Advanced Member nsw austalia |
17th Feb, 2010 at 09:44:27am
On 17th Feb, 2010 Paul S said:
As far as I am aware, the 1100 Hypatec pistons are standard replacement items with oil drain slots. They are not the high performance items that are available for the 998s with drilled oil drains. Please correct me if I am wrong. The land has broken above where the slots are cut. Given that, I think you have done very well to get 25k from an engine capable of 165hp. yeh thats right , they are very cheap but are not a bad piston and will happy do around 100hp , i was pushing the limits of them:) at the time of my build the were the easy option for me , the only other avialble piston for me was the swifttune forged omegas but only came in flat top and more than 4x the price so i chose the hypatecs. Now i will use some russel engineering ones which should be fine for 20psi. again the hypatec piston has worked great there was another 1100cc mini here in australia making 10hp more than mine with the same pistons but it has much less km/s on it . 1152cc turboed mini clubman, most powerful 1.1L a-series?
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 720 Posts Member #: 2588 Post Whore Pretoria South Africa |
17th Feb, 2010 at 01:08:50pm
Very impressive ! With that power and milage, hows the gearbox holding up ? "So wat we gonna do tonight Brain?"
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
17th Feb, 2010 at 06:49:22pm
On 17th Feb, 2010 paul wiginton said:
On 17th Feb, 2010 Vegard said:
I've got these fitted in my 1100T, but I haven't run it yet. How much boost were you running? I was considering these too. Has anyone ever used one compression ring only on turbo? Paul ????? there are three compression rings on those so if you mean there is one ring down, it still has another two compession rings, not one. 
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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8604 Posts Member #: 573 Formerly Axel Podland |
17th Feb, 2010 at 06:56:51pm
I think what Paul means is that the 998 Hypatecs are 3 ring pistons, but come with a 4 ring set. The third ring being a "scraper" ring. Minispares recommend using one compression ring and the scraper ring but discard the second compression ring.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
17th Feb, 2010 at 07:00:41pm
Ah Okay, I see.
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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8604 Posts Member #: 573 Formerly Axel Podland |
17th Feb, 2010 at 07:06:49pm
That's because they are standard replacement 1098 pistons.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 4890 Posts Member #: 1775 Post Whore Chester |
17th Feb, 2010 at 07:58:33pm
Speaking to a guy in AUS he mentioned that the 998 pistons had holes and not slots from +80 and upwards...
Edited by gr4h4m on 17th Feb, 2010. I run a supercharger and I don't care the TB is on the wrong side.
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5795 Posts Member #: 80 AFRacing LTD Newbury, Berks |
17th Feb, 2010 at 08:12:24pm
looks like det damage... AlexF |
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8604 Posts Member #: 573 Formerly Axel Podland |
17th Feb, 2010 at 08:22:02pm
On 17th Feb, 2010 gr4h4m said:
Speaking to a guy in AUS he mentioned that the 998 pistons had holes and not slots from +80 and upwards... http://www.minisport.com.au/category5_1.htm Funny that you can get the same pistons from Minispares in plus 20, 40 and 60, but at twice the price. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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4890 Posts Member #: 1775 Post Whore Chester |
17th Feb, 2010 at 08:42:36pm
Paul? are you saying that the minispares have holes? ad not slots? I run a supercharger and I don't care the TB is on the wrong side.
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8604 Posts Member #: 573 Formerly Axel Podland |
17th Feb, 2010 at 09:23:58pm
On 17th Feb, 2010 gr4h4m said:
Paul? are you saying that the minispares have holes? ad not slots? Yes, the 998 ones do, search for "P20950" They are all made by Right Way in Taiwan. Edited by Paul S on 17th Feb, 2010. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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Forum Mod 5933 Posts Member #: 784 9 times Avon Park Class C winner Milton Keynes |
17th Feb, 2010 at 09:45:49pm
On 17th Feb, 2010 Sprocket said:
On 17th Feb, 2010 paul wiginton said:
On 17th Feb, 2010 Vegard said:
I've got these fitted in my 1100T, but I haven't run it yet. How much boost were you running? I was considering these too. Has anyone ever used one compression ring only on turbo? Paul ????? there are three compression rings on those so if you mean there is one ring down, it still has another two compession rings, not one. I mean getting a piston made with one slot for a compression ring and one for an oil ring as per some Miglia. It would give bigger ringlands between the rings and to the crown aswell as the lower friction Paul Edited by paul wiginton on 17th Feb, 2010. I seriously doubt it! |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
17th Feb, 2010 at 10:04:44pm
On 17th Feb, 2010 paul wiginton said:
On 17th Feb, 2010 Sprocket said:
On 17th Feb, 2010 paul wiginton said:
On 17th Feb, 2010 Vegard said:
I've got these fitted in my 1100T, but I haven't run it yet. How much boost were you running? I was considering these too. Has anyone ever used one compression ring only on turbo? Paul ????? there are three compression rings on those so if you mean there is one ring down, it still has another two compession rings, not one. I mean getting a piston made with one slot for a compression ring and one for an oil ring as per some Miglia. It would give bigger ringlands between the rings and the to the crown aswell as the lower friction Paul Ah, got ya 
the only benefit of single compression ring pistons is less internal loss due to reduced friction. Is that really a problem with turbo motors? although I see what you are getting at :) what needs to happen is the manufacturers design a turbo specific piston with wider lands as you suggested. It wouldnt take much as the A series piston is tall anyway. The standard Metro Turbo piston has a wider second ring land
Edited by Sprocket on 17th Feb, 2010. On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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