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Get off my lawn!
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What type of engine did this piston come from?
 At a car show a month ago I won a trophy for 2nd place with my 911.  I was just curious, what did this come out of. It is obvious it is a well used piston.  In the center of the piston is stamped a 6 or 9, but unless it is from a HUGE 10 cylinder engine I suspect it is a 6. The other marking looks like it is an H.  You can see it is big piston, just fraction under 3 & 7/8th inch. If it matters I can use my calipers on it if they go that big and get a more accurate size. I feel certain it is not a Porsche piston, and I honestly don't really care much, but I was just curious if the brain trust had a idea as to what it likely is from. Ford, Chevy, Mopar, or some industrial engine. I suspect it is the trash from some local engine re-builder. I do know my wife is not real happy with it in the house as another thing to dust, so I suspect it will go to my garage to be on display for a while, and then to the attic or back to the car show folks as a donation to the next car show. I have an attic of trophies from Autocrosses and not many car show trophies. Usually a Red Cabriolet or some flashy Turbo with a big wing and wheels win the popular voting. This was not a judged car show, just the people in attendance voting for their favorite of each category. With almost 300 cars there it was a lot to look at. I enjoyed looking at the other cars as much as talking to people about mine. It was a fun day.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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10-02-2020, 07:59 AM
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I didn't sleep in a Motel 6 last night...but that piston reminds me of small block chevy flat top pistons that have four cutouts for the valve relief - this this one courtesy summit racing (obviously this one is aftermarket).
angela 
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Hello http://forums.pelicanparts.com/off-topic-discussions/1102514-we-lost-amazing-woman-yesterday.html |
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10-02-2020, 08:14 AM
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Unregistered
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Location: a wretched hive of scum and villainy
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It's machined with reliefs for 4 valve per cyl
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10-02-2020, 08:53 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,352
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Quote:
If it's 2 valve per, then I vote for Small Block Chevy.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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10-02-2020, 09:02 AM
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Quote:
There can't be many four valve motors with a four inch bore. Interesting stuff...
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Jeff '72 911T 3.0 MFI '93 Ducati 900 Super Sport "God invented whiskey so the Irish wouldn't rule the world" |
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10-02-2020, 09:09 AM
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Get off my lawn!
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I was guessing small block Chevy mostly because there are so many of them due to price. I have never seen a Chevy hot rod with a Ford engine in it. I bet more 32 Ford hot rods have Chevy engines than Ford engines.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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10-02-2020, 09:28 AM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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Yes ^^^^based on the picture looks like a true flat-top cast which would be early higher compression or replacement aftermarket
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold Last edited by asphaltgambler; 10-02-2020 at 11:23 AM.. |
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10-02-2020, 11:21 AM
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Get off my lawn!
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So if the average 454 has a 4.250 inch bore is this from a 350?
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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10-02-2020, 11:28 AM
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Join Date: Feb 2008
Posts: 18,646
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928...
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dolor et pavor Copyright |
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10-02-2020, 11:29 AM
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Quote:
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Keep talking, Im gonna put you in the trunk. |
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10-02-2020, 12:11 PM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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more likely a 305...……..
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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10-02-2020, 12:19 PM
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Maybe some kind of Ls
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Tony |
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10-02-2020, 12:20 PM
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Turns out they do make chebby small block pistons with 4 valve reliefs, for peoples not smart enuff to build engines the right way.
  BTW if its from a SMC and has a 3.743 bore, it's prolly a 305 or 262 Last edited by sammyg2; 10-02-2020 at 01:09 PM.. |
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10-02-2020, 01:04 PM
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Chevrolet 292 inline 6 ? Thats my guess . The rod looks different than a small block
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No left turn un stoned |
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10-02-2020, 02:08 PM
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Quote:
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No left turn un stoned |
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10-02-2020, 02:10 PM
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Location: Marysville Wa.
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Got a set of 350 chevy pistons. Here's one.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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10-02-2020, 02:15 PM
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Get off my lawn!
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It does make sense to make a piston that just one part will work on either side of a small block. Just one part to make and package and it works in any cylinder of the engine. No wonder the SBC is so cheap.
Of course if ya wanna, just "while yer in there", just change some parts out and spend as much as you can afford to for more HP.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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10-02-2020, 02:20 PM
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Quote:
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. |
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10-02-2020, 06:08 PM
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The do offset about 1/8"ish.
Pic shows caliper and gap on the long side after measuring the shorter side. There's an arrow with "front" on mine, so on one side the arrow is on top and the other side it's on the bottom. Some have a notch on the edge that faces front. 
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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10-02-2020, 07:08 PM
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The piston in the OP has an odd shape to the casting below the wrist pin. Never seen that in a small block Chevy.
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Keep talking, Im gonna put you in the trunk. |
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10-02-2020, 08:14 PM
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Carrera
Black Betty
