HSC Pistons - broke one? Great Pictures!

[Mustangaroo]

My son Jason is running HSC Tempo pistons in his 200 six, he had just over 20,000 miles when it started to tick? We removed the head twice this past week, it sounded like a lifter? Then today we droped the pan, rotated the crank to get a better view of the #2 piston and with light in hand you could see a crack on the piston skirt , Ouch! Then we pushed the number two piston out of the block to take this pictures. I'm not even thinking anything was bad with the piston manufacture!
Jason has taken this engine to the dark side one to many times and now pays the price!
http://www.ncinternet.net/~durham/jason1.jpg
http://www.ncinternet.net/~durham/jason2.jpg
http://www.ncinternet.net/~durham/jason3.jpg
We ordered the new piston today, and should have the piston by Tuesday, and his Mustang should be back on the road by Friday!

 

[chandler]

i guess that might make a ticking noise...nice turn around time too

 

[xctasy]

That's great the you got it early. Hows the bore?

The 200 has quite a lot of side thrust on the pistons. I remeber you were running lots of squeeze on the compression ratio.

If you can document the ring clearances and clearance of the piston in the cylinder, you'll possibly find its too tight. The Aussie 202 Holden guys always go up on piston and ring clearance from what Holden recomend. I've got the specs somewhere. They run a 5.25" rod which is nigh on boomb proof.

I'd follow the HSC ring and piston clearance, and add 2.5 thou.

Shouldn't happen again.

Our old Holden engines used to crack the top clean off the piston and break skirts as well. Great to know you've only got one issue to deal with!

 

[ruckus68]

ouch
any damage to the cylinder wall?

John

 

[LameHoof65]

Just curious, did the piston come out intact and cracked or did it fall out in two pieces.. Reason I ask is that if it came out in one piece maybe the cylinder wall was spared?

 

[MandarinaRacing]

Jason has taken this engine to the dark side one to many times and now pays the price!

"Drive it like you stole it !!!!
.....Words to live by.....

AHEM!!!!!!
I mean, shame on you yong man! Money doesn't grow on trees.....

Alex

 

[Mustangaroo]

Yes it came out in one piece and then while taking pictures and inspecting it, it came apart. The first picture is the way it came out of the cylinder. The cylinder walls have no scaring, and everything looks fine. This is my son's engine in his 1965 Mustang, it a balanced 200, HSC Pictond and Isky cam, adjustable rockers and running 9:5.1 C/R the bolck was decked to "ZERO" Aussie 2v head and intake, but is running my old custom made 4v intake and my 4150 Holley 600 carb.

You can just see the crack! Sorry the crack is not in focus!

http://ncinternet.net/~durham/jason5.jpg

I think Xtaxi may be onto something about the side forces on these sixes, we believe the lifter failed as it didn't seam to be holding pressure and the cylinder compression went from 145 lbs to 185 lbs upon changing the lifter. The rod was a little bent so we replaced it too. The noise it was making didn't sound like the bottom end and it was only after we pulled each rocker on the #2 cylinder and found it made no noise with both not connected. The cylinder would still be making pressure but it would not increass with both valves closed, so upon seeing this, I told Jason we needed to pull the oil pan as I thought it was a broken piston or something with the wrist pin or rod bearings! Yes we were lucky no other damage resulted from this, and that it was only driven gently once the noise started.

 

[MustangSix]

I'm not sure I would open up the clearances on a cast piston. They are designed to run at .0015 - .003" of clearance. A forging would like a lot more, but they expand more. More clearance would induce a "cocking" action that might increas side loading on the piston.

Keep in mind that piston speeds are fairly high when you buzz these things over 5000. It may take a forging or a hypereutectic to live with the strain of those speeds.

Until, then, stick a rev limiter in Little Roo's MSD!

 

[Junk-Falcon]

ppp

 

[Anonymous]

Keep in mind that piston speeds are fairly high when you buzz these things over 5000. It may take a forging or a hypereutectic to live with the strain of those speeds.

Thats freakin scary considering how I beat the crap outta mine!

Doug

 

[Anonymous]

hmmmm.....interesting...I guess when I get mine with forged pistos on the road and broken in next summer I'll find out if the extra dough for forged pistons was worth it....

 

[Mustangaroo]

hmmmm.....interesting...I guess when I get mine with forged pistos on the road and broken in next summer I'll find out if the extra dough for forged pistons was worth it....

All pistons can break, FORGED TOO! It just takes the right conditions to break. Now tell me how much just one Ford six (arn't they sold in sets?) Forged piston is going to cost?

 

[Anonymous]

If you want some forgies let me know. I can get you a set of IAPELs to you door in a few days for $450. Shoot me a PM for some pics / info

 

[Anonymous]

I already have a set of Ross forged pistons in the block, just have to finish up the car so I can put the engine back in. Oh and yes they were expensive

 

[Anonymous]

timing

 

[Mustangaroo]

Jason has his engine back together and running again, just a little up date here.

1. New piston same brand - $20.00 HSC flattop
2. machine shop press-out the wrist pin and weigh piston $15.00
(piston same weight as before - Balanced engine! )
3. New head gasket $25.00
4. Five qts oil $10.00
5. Total cost of parts $70.00

6. Jason did all labor himself....$PRICELESS

 

[MandarinaRacing]

That is a NIIIIICE picture ! ......

I wish I could take pics of my car like that......oh well.....

Give Jason a big

Alex

 

[Anonymous]

i love the rubber on that. what size are you running front and back? need new tires, and that looks good.