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hypatec piston

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titi de lille

Post subject: hypatec piston

Posted: Mon Feb 19, 2007 3:25 am

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

hello,

I will rebore my engine in 1275 +0.40 or +0.94

do you know if the hypatec piston are very reliable? are they able to run more than 80 000 miles in a stock engine?

you think about?

titi de lille

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www.moroccominiraid.blogspot.com

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drmini in aust

Post subject: Re: hypatec piston

Posted: Mon Feb 19, 2007 6:12 am

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39753
Location: near Baulkham Hills, NSW

titi de lille wrote:

Yes they are very reliable, the +.040" ones are of similar design to a Hepolite 21253, but stronger- as the oil drain slots are smaller.

The 73.0mm ones (+.094") are similar design but even stronger as they use oil drain holes, not slots.
Many people use them for racing, they are a strong piston.
My rebuilt 1360 has them, it has now done about 5000 miles and is using NO oil.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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titi de lille

Post subject:

Posted: Mon Feb 19, 2007 6:22 am

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

hi,

thanks a lot for your information.

do you think they are reliable for more than 80 000 miles? because I use my mini not often , but when I use it, I run about 12h at 3800 rpm to cross france ( 630 miles ) or for imm and now for my event ( morocco mini raid in north of africa.

regards

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drmini in aust

Post subject:

Posted: Mon Feb 19, 2007 6:24 am

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39753
Location: near Baulkham Hills, NSW

I believe you will not find a better piston for life, they have a high silicon content and will last much better than forged ones for road use. :wink:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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titi de lille

Post subject:

Posted: Mon Feb 19, 2007 6:27 am

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

you are fast to answer

for it's better than omega or powermax?

have a look on my web site , you see , why I search very realiable piston and engine

www.moroccominiraid.blogspot.com

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drmini in aust

Post subject:

Posted: Mon Feb 19, 2007 6:56 am

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39753
Location: near Baulkham Hills, NSW

Better than Powermax, definitely. :wink:

The Omegas, I have not used.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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titi de lille

Post subject:

Posted: Mon Feb 19, 2007 7:06 am

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

thanks a lot

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kiwiinwgtn

Post subject:

Posted: Wed Feb 21, 2007 7:42 pm

1098cc

Joined: Sun Feb 20, 2005 8:11 pm
Posts: 1347
Location: Wellington,

The hyptec got my money.

Also used here in NZ,

Good value for money

Kiwiinwgtn

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drmini in aust

Post subject:

Posted: Wed Feb 21, 2007 8:25 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39753
Location: near Baulkham Hills, NSW

I have another set of 73mm Hypatecs (with Russell Engineering modified dish) going into the 1412 stroker.

Fot the wife's Clubby van.... :wink:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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titi de lille

Post subject:

Posted: Thu Feb 22, 2007 5:48 pm

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

to have a1412; you chnage your cranckshaft?

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drmini in aust

Post subject:

Posted: Thu Feb 22, 2007 6:36 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39753
Location: near Baulkham Hills, NSW

I'm using an early 12G1505 large journal (still std/std size) 1275 crank, the rod journals have been offset ground to 1.625". It's now 84.33mm stroke.
Also I've wedged it, and had it balanced.
Conrods are Cooper S.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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titi de lille

Post subject:

Posted: Fri Feb 23, 2007 12:04 am

848cc

Joined: Mon Feb 19, 2007 3:13 am
Posts: 51
Location: france

I have a friend who try piston a car but I know which and is engine if it's work will be 1440cc.

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