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| pistons https://ausmini.com/forums/viewtopic.php?f=5&t=2317 |
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| Author: | midget [ Wed Oct 13, 2004 10:28 pm ] |
| Post subject: | pistons |
Hi guys has anyone used the hypertec pistons Are they a good / bad unit Are they good value for what you get, I have been quoted $250 dollars for pistons and rings Anyone recomend a piston for 1275 fast road use around 10:1 comp cheers paul |
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| Author: | drmini in aust [ Wed Oct 13, 2004 10:34 pm ] |
| Post subject: | |
Can't think of anything better, for the money. I know people that race with those ones. They look a bit like a 21253 Hepolite but are stronger- the oil drains are drilled holes, not a dirty big slot. I got a set of Hypatec 73.0s (1360cc) for $270. Hepolites (73.5) would have cost me over $600, and this way, I got 1 bore job left in the block for next time.. 
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| Author: | justminis [ Thu Oct 14, 2004 7:19 am ] |
| Post subject: | |
commonly used by Group N Mini guys around Brisbane, I use the in my sprint mini, absolutely no problems with 8000 revs regularly. Good value for money, tip is to use Hastings rings with them. Steve |
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| Author: | zippytheclown [ Thu Oct 14, 2004 7:46 am ] |
| Post subject: | |
where do you get these pistons, are they readily available locally, i.e. australia? or do you have to order them in? |
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| Author: | MiniK [ Thu Oct 14, 2004 2:49 pm ] |
| Post subject: | |
Can get them from Ken Nelson at Mini Automotive in QLD. Doc knows the website..... 
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| Author: | zippytheclown [ Thu Oct 14, 2004 3:22 pm ] |
| Post subject: | |
mini automotive, do you mean MR automotive? |
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| Author: | drmini in aust [ Thu Oct 14, 2004 6:14 pm ] |
| Post subject: | |
http://www.miniauto.com.au/ is Ken Nelson's site. I got mine there too. Email him.. 
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| Author: | designer [ Thu Oct 25, 2007 11:43 am ] |
| Post subject: | pistons |
so value for money the hypatecs are the go as opposed to heplite 21253 pistons ? Would they be suitable for cutouts and to be used on an engine that produces over 140 bhp ? cheers |
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| Author: | TK [ Thu Oct 25, 2007 5:11 pm ] |
| Post subject: | |
Fine for that hp and fine for cut outs as they have a thickish crown. I bought a set of 1360s not long ago from Minisport in Adelaide with hastings rings for only $179.00 yeah hah!!! 
check out ebay. Here you go: http://cgi.ebay.com.au/mini-morris-aust ... dZViewItem |
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| Author: | drmini in aust [ Thu Oct 25, 2007 7:28 pm ] |
| Post subject: | Re: pistons |
designer wrote: so value for money the hypatecs are the go as opposed to heplite 21253 pistons ?
Would they be suitable for cutouts and to be used on an engine that produces over 140 bhp ? cheers The Hepolite 21253s have a milled slot behind the oil ring for drainage. Pistons can break there under extreme duress. Hypatecs look similar but have drilled holes, a much stronger solution. I'm running Hypatec 73mm in the 1360, it sees 8000 now and then. I also have them in the 1412 stroker, but it's still being built. Hypatecs are a great piston, you won't do better unless you go for Russell Engineering's ones. They are similar design but the crown dish is a different shape, better for HP. Note the 998 ones are on left, 73mm (1360cc) ones on the right. 
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| Author: | slinkey inc [ Thu Oct 25, 2007 9:37 pm ] |
| Post subject: | |
Doe Russel Engineering make those '1360' pistons in 1330? (+0.030")? They look suspiciously like the ones in my engine, which I am unsure of the type. The dish in the same way, with a flat lowered section. And the step up to the flat top ring around them is very steep. Do they have a part number? <edit> Also mine look very similiar underneath regarding the 'skirts', I think they are called. |
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| Author: | drmini in aust [ Thu Oct 25, 2007 10:12 pm ] |
| Post subject: | |
1330 is +.060", yes I'm pretty sure he does. ring him and check- (02) 9630 2195.
Before he got these pistons made, he used to put the same dish shape into Hypatecs. |
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| Author: | slinkey inc [ Fri Oct 26, 2007 4:45 pm ] |
| Post subject: | |
Cool, I'll give him a buzz sometime.
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| Author: | slinkey inc [ Fri Oct 26, 2007 4:48 pm ] |
| Post subject: | |
drmini in aust wrote: 1330 is +.060".
Dummmmb, yes. Mine are +0.060" according to my reciept from the engine builders, although the builder's insisted that +0.060 was 1310cc, I didn't bother argueing.... |
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| Author: | willy [ Fri Oct 26, 2007 5:29 pm ] |
| Post subject: | |
slinkey inc wrote: I didn't bother argueing....
That doesn't sound much like you 
40thou is 1310. So your engine builder is a twat. |
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