Cross Section Hypatec Pistons
Turbo Mini Forums

Ive just paid 50 for these pistons. That 4 with Gudgoen Pins (no rings) Thought id chop 1 in half which met an unfortunate end in the lathe! Whoops!

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Nice!

But, would it not have been better if you sectioned the piston across the pin rather than through the pin boss's? You would have a better idea of the crown profile in the critical areas.

I like cutting things up, lol, i now have two blocks sectioned, a 1275 A+ and an 850

Ill chop it the other way tomoz for ya!

Edited by MikeRace on 12th Oct, 2007.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

On 12th of Oct, 2007 at 05:34pm Mini Sprocket said:

I like cutting things up, lol, i now have two blocks sectioned, a 1275 A+ and an 850

Edited by Jordan on 12th Oct, 2007.

Back once again like a renegade master

Looks like a very strong piston indeed !!!!


I measured a CP Piston we used on some 2.33 Subarus ages ago. The crown thickness was only 5.5mm !!!!!!!!!!

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

?
Im guessing high power scooby units as well. Setup on the flat fours is brill though, reasonably reliable, and sound like god gurgling.

Edited by Jordan on 12th Oct, 2007.

Back once again like a renegade master

Only commenting, as 5.5mm it bloody thin !!!

That cutaway looks like a lot thicker than that, and I'd imagine most pistons have thicker crowns.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Slots worry me

Edited by Sprocket on 13th Oct, 2007.

Missed them. Wonder why they didnt use holes?

Back once again like a renegade master

I think the pin boss is masking the true strength of these pistons hence why its better to cut them the other way

Not doubting that these would be good for a general rebuild, doubt id be fitting them to a high reving or mega boost engine though.

Back once again like a renegade master

if that was done on a lathe i'd worry about the operator

i think a band saw or just hacksaw has been called into action.

i'm guessing he was machining a bigger dish?

mike tell your father in law hese a crap machinist ....lol!!

I would worry bout operator as well. Cause thats what i do for a livin.

Back once again like a renegade master

nice work, it's good to see a cut of a piston.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Ha, no i wasnt trying to cut a piston in half on a lathe? Cant see how you would come to that conclusion as it would be impossible!

The CNC machine apparently fucked up? Or more like the spaz i gave it to put the wrong coodinates in? but hey ho accidents happen. The pistons had been sent off to have a bigger dish put in them. I have read up on the pistons and it seems they have a good rep. From racing hand hill climbing.

These pistons will be ran in my turbo engine at around 10psi of boost maybe a little more running a cossy intercooler and megojoly.

Ill let you guys know how i get on!

Cheers

Mike

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Didnt spot the oil slots either.....


Thats a ticking time bomb.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

I've just received my 1100 Hypatecs. They have thi slot as we.. At a guess the TT2 does have these pistons, and has held up rather good right? THe same goes for Benjamin (?) in Aus.

The TT2 and my 998 both have the Minispares 20950 pistons.

Mine do not have slots and neither does the TT2.

Edited by Paul S on 14th Oct, 2007.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Edited by Paul S on 3rd Nov, 2007.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

http://www.minisport.com.au/

Very cheap, and excellent service! I had them in Norway five days after I ordered them.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

7cc i think, i need to check for sure.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

think this is strange, as the hypatec 1275 pistons they use themselves in australia does not have oil slots, but holes.... I know a few down there using them.

mike ,did you ever cut this the other way ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM