306 VS. 347 Piston Photos...............

MOTOIMPAIRED · July 29th, 2009, 10:01 PM

Here I took photos of my Probe Factory stock 306 pistons and the Sportsman Race 347 piston. Yes the 347 has a shorter skirt and there is minimum clearance from the piston pin and oil ring but there is material there...

Posting these for those that have never seen a 347 piston but comment on the fact that they burn oil...

ReverendDexter · July 29th, 2009, 10:05 PM

Do you have weights for those two pistons by any chance?

MOTOIMPAIRED · July 29th, 2009, 11:02 PM

I went to weigh them but the batteries in my one scale are dead and the other scale max's out at 300 Grams...

I will find out since it's not posted on the website.. I'll let you guess which one weighs less.... LOL

sickfox · July 30th, 2009, 12:11 AM

Originally Posted by MOTOIMPAIRED

I went to weigh them but the batteries in my one scale are dead and the other scale max's out at 300 Grams...

I will find out since it's not posted on the website.. I'll let you guess which one weighs less.... LOL

pothead.

MOTOIMPAIRED · July 30th, 2009, 01:38 AM

Originally Posted by turbofoxbody

pothead.

Lol.. I do use the scales for weighing drugs but I am by no means a dealer... I'm the opposite!

superbean · July 30th, 2009, 02:45 AM

i bet that 347 piston weighs a good bit less..

sickfox · July 30th, 2009, 06:55 PM

Originally Posted by MOTOIMPAIRED

Lol.. I do use the scales for weighing drugs but I am by no means a dealer... I'm the opposite!

i hear ya man.

1slo5.0 · July 30th, 2009, 07:35 PM

Subscribing...........lol

MOTOIMPAIRED · July 31st, 2009, 06:51 AM

Originally Posted by 1slo5.0

Subscribing...........lol

They make more money then me for sure.. I just work the "narcotics" side of the relm... Trying to make this world a better place one day at a time.

80mustang200 · July 31st, 2009, 07:00 AM

would you recommend boaring out a 302 to a 347,would you get the same performance

1slo5.0 · July 31st, 2009, 04:12 PM

Originally Posted by MOTOIMPAIRED

They make more money then me for sure.. I just work the "narcotics" side of the relm... Trying to make this world a better place one day at a time.

I wasn't directing that at you. I was just saying "subscribing" because I'm humored by the internet experts that have no experience building or even owning 347s but think they are qualified to give advice or criticize 347s. I'm sure it won't be long before someone posts some stupid bullshit about burning oil, pistons rocking in the bores, rod to stroke ratio, poor reliability, etc.

Moving on, so you are a narcotics officer? I'm sure that is a job that never gets boring. I started to pursue a career in forensic science but I didn't get much further than the "starting to pursue" part. My current job is just too demanding right now to have the extra time for more schooling. Its definitely the field I want to be in though.

1slo5.0 · July 31st, 2009, 04:13 PM

Originally Posted by 80mustang200

would you recommend boaring out a 302 to a 347,would you get the same performance

Same performance as what?

bitemark46 · July 31st, 2009, 06:58 PM

Wow, that is very thin material between the pin and the ring. I can see where people say that 347's burn oil of that clearance is on all 347 pistons. Maybe not on a new engine but put 5k miles on that piston and I'm sure with the temp cycles that the material gets weak and flexes. If I was a bettin man I would too say the 347 piston will burn oil first and even fail first.

slow 98 · July 31st, 2009, 07:15 PM

^good thing you aren't a betting man.

baine21225 · July 31st, 2009, 07:43 PM

Originally Posted by bitemark46

Wow, that is very thin material between the pin and the ring. I can see where people say that 347's burn oil of that clearance is on all 347 pistons. Maybe not on a new engine but put 5k miles on that piston and I'm sure with the temp cycles that the material gets weak and flexes. If I was a bettin man I would too say the 347 piston will burn oil first and even fail first.

really?

1slo5.0 · July 31st, 2009, 10:44 PM

Originally Posted by bitemark46

Wow, that is very thin material between the pin and the ring. I can see where people say that 347's burn oil of that clearance is on all 347 pistons. Maybe not on a new engine but put 5k miles on that piston and I'm sure with the temp cycles that the material gets weak and flexes. If I was a bettin man I would too say the 347 piston will burn oil first and even fail first.

That is the first time I've seen a 347 piston that even had a ledge for the oil ring in the wrist pin area. Commonly they use a rail support that and then the ring goes on. I think this is a fairly new piston design. Either way, there are no oil burning or reliability issues. That is fact.

You can bet all you want, 347s don't burn oil and these pistons are not going to fail. Probe makes a very good product. If there was any chance for reliability issues these pistons would never see the market.

86er · August 1st, 2009, 03:42 AM

Originally Posted by 1slo5.0

That is the first time I've seen a 347 piston that even had a ledge for the oil ring in the wrist pin area. Commonly they use a rail support that and then the ring goes on. I think this is a fairly new piston design. Either way, there are no oil burning or reliability issues. That is fact.

You can bet all you want, 347s don't burn oil and these pistons are not going to fail. Probe makes a very good product. If there was any chance for reliability issues these pistons would never see the market.

yeah but you dont get it, its a 347, it HAS to burn oil and be unreliable, because someone somewhere said so

MOTOIMPAIRED · August 1st, 2009, 08:15 AM

Originally Posted by 1slo5.0

I wasn't directing that at you. I was just saying "subscribing" because I'm humored by the internet experts that have no experience building or even owning 347s but think they are qualified to give advice or criticize 347s. I'm sure it won't be long before someone posts some stupid bullshit about burning oil, pistons rocking in the bores, rod to stroke ratio, poor reliability, etc.

Moving on, so you are a narcotics officer? I'm sure that is a job that never gets boring. I started to pursue a career in forensic science but I didn't get much further than the "starting to pursue" part. My current job is just too demanding right now to have the extra time for more schooling. Its definitely the field I want to be in though.

LOl.. Yes drugs are a never ending issue, but I have been doing a lot more of everything lately. Drugs are fun and it is always a reward when you find a good amount! I also do Mt. bike and marine patrol.. all fun stuff too..

That is the new design piston that I posted. Like you said, this piston has material above the pin, most dont. I was at my engine builders yesterday and he had some pistons that had nothing above the pin, and it was a high horsepower engine... No blow by or oil burning...

I posted these pictures just to show those that have never seen a 347 piston and now I want to sit back and see the rumors fly!!!!

sickfox · August 1st, 2009, 11:16 AM

Them drugs keep alot of people employed, Seem you have quite the enjoyable job!!

1slo5.0 · August 1st, 2009, 11:20 PM

Originally Posted by 86er

yeah but you dont get it, its a 347, it HAS to burn oil and be unreliable, because someone somewhere said so

Oh yeah, lol!

July 29th, 2009, 10:01 PM	#1
MOTOIMPAIRED Regular 1990 LX Coupe Join Date: Apr 2008 Location: Orlando FL Posts: 343 iTrader: 0 reviews	306 VS. 347 Piston Photos............... Here I took photos of my Probe Factory stock 306 pistons and the Sportsman Race 347 piston. Yes the 347 has a shorter skirt and there is minimum clearance from the piston pin and oil ring but there is material there... Posting these for those that have never seen a 347 piston but comment on the fact that they burn oil...

July 29th, 2009, 10:05 PM	#2
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,233 iTrader: 0 reviews	Do you have weights for those two pistons by any chance? __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\ Buy my Bronco, special deal for MM folks

July 30th, 2009, 02:45 AM	#6
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	i bet that 347 piston weighs a good bit less.. __________________ weeee foooord!

July 30th, 2009, 07:35 PM	#8
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Subscribing...........lol __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

July 31st, 2009, 07:00 AM	#10
80mustang200 Newbie 1980 Ford Mustang WAY TO LONG Join Date: Jul 2009 Posts: 15 iTrader: 0 reviews	would you recommend boaring out a 302 to a 347,would you get the same performance __________________ 1980 mustang I6 200 0-60 in "get me an f'ing V8"

July 29th, 2009, 11:02 PM	#3
MOTOIMPAIRED Regular 1990 LX Coupe Join Date: Apr 2008 Location: Orlando FL Posts: 343 iTrader: 0 reviews	I went to weigh them but the batteries in my one scale are dead and the other scale max's out at 300 Grams... I will find out since it's not posted on the website.. I'll let you guess which one weighs less.... LOL

July 31st, 2009, 06:58 PM	#13
bitemark46 Regular Join Date: May 2008 Location: Tampa, Fl Posts: 384 iTrader: 0 reviews	Wow, that is very thin material between the pin and the ring. I can see where people say that 347's burn oil of that clearance is on all 347 pistons. Maybe not on a new engine but put 5k miles on that piston and I'm sure with the temp cycles that the material gets weak and flexes. If I was a bettin man I would too say the 347 piston will burn oil first and even fail first. __________________ -Mark- 98' N/A Cobra (Stock longblock) 11.79 at 114.64 (1.62 60ft)

July 31st, 2009, 07:15 PM	#14
slow 98 Regular 90 GT Join Date: Aug 2008 Location: Offutt AFB Posts: 75 iTrader: 0 reviews	^good thing you aren't a betting man.

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