Need 500 piston

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radtech
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Need 500 piston

Post by radtech »

Anybody have or know where I can get a stock 10.5/1 "peanut" piston or even a whole set without buying a whole parts engine?? Broke a ring land on a piston and I can't seem to locate one. Any help would be hugely appreciated. Thanks!

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Deano
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Re: Need 500 piston

Post by Deano »

Thought I had a set, but after going out and looking they end up being the soap dishes, and not the peanuts.

A good source I've used over the years is Egge Machine. 866-996-3443 Their part number for the piston you're after is L2367.
Never had a problem getting what I needed from them, but those early model higher compression ones may be getting to be a different story at this late date. I'd give them a call and see though, they may very well have a few on the shelf.

https://egge.com/media/pdf/Egge95thAnni ... atalog.pdf
What you're after is on page 11, top left hand corner.
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radtech
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Re: Need 500 piston

Post by radtech »

Thanks a lot, Deano! I will certainly check them out. I'm so ready to get this thing redone and back on the water. Been too long without my ride.

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Robo
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Re: Need 500 piston

Post by Robo »

Tim get that boat up and running, there are people in Florida getting hungry waiting on your return.

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Slidin Gator
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Re: Need 500 piston

Post by Slidin Gator »

I’m with Robo, I’m trading AV fuel for BBQ alll day.
I still think I-10 is the Mason Dixon line.
2013 Mike Stossel Boats, 13' x 7' deck over, IO-540, 74" NGQ less winglets.

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radtech
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Re: Need 500 piston

Post by radtech »

I hear ya, boys! I'm doing my best. I hope I can make it this year. Losing that piston is putting a damper on funds. Don't worry, I will let everyone know when I can make it and we will do it up even better next time!

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radtech
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Re: Need 500 piston

Post by radtech »

:angry5: well, I was gonna try to load a couple pics, but my laptop will no longer allow me to get on SA for some reason. My point...I should be fully honest about the whole financial situation. Lol After the engine failure, a friend ran across a deal I couldn't pass up on a 19 ft center console fishing boat, so I'm also paying for that. Couldn't pass up $6,500 for it with a jam up 90 horse merc. Can't buy the engine for that! Lol Hopefully I can get it all straight and be in a position to come down in late spring. I will certainly keep y'all posted. I miss hanging out and riding with my FL buddies!!

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Robo
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Re: Need 500 piston

Post by Robo »

Congratulations on the Center Console, I believe we can wait till late spring, just gives a little more time for planning.

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Robo
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Re: Need 500 piston

Post by Robo »

Congratulations on the Center Console, I believe we can wait till late spring, just gives a little more time for planning.

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Deano
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Re: Need 500 piston

Post by Deano »

Did you have no luck with Egge?
What size are you after anyway; Std, +30, or something else?
Could put out some feelers, but don't know exactly what you are after.
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but it is not the path to knowledge; it has no place in the endeavor of science."
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radtech
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Re: Need 500 piston

Post by radtech »

Deano, it's stock. Hasn't been bored out. Haven't called Egge yet. I am waiting til I get paid tomorrow. That way if they have them I can go ahead and order. Hopefully I will get it located and on the way.

Thanks, Robo. I'm looking forward to some time in the flats fishing. Too bad it's impossible to pull 2 boats or I'd bring them both this spring. Lol
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radtech
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Re: Need 500 piston

Post by radtech »

Been off the grid for a bit, but I'm back on the boat. Got a new set of pistons, now I have to finish tearing down the engine and get it bored 30 over. Hopefully I'll be back on the water before the weather gets cold. Lol
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Re: Need 500 piston

Post by lilly-Pad »

sweet one step closer to the swimming hole :cheers:
12 ft Don Davis / 0470 conv / 68 NGQ , A.A.O.F member

Best laid plans of mice and men, wont always get you laid.............

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radtech
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Re: Need 500 piston

Post by radtech »

Dang right, brother!

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digginfool
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Re: Need 500 piston

Post by digginfool »

Looks like we're both going to be ready to hit the Swimming Hole soon! I'm thinking the day after your next boil at Mack's!
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radtech
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Re: Need 500 piston

Post by radtech »

That's a big 10-4, diggin!!! That's probably my favorite ride to date. I love the long ride and cypress tunnels. I can't wait to do it again

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Re: Need 500 piston

Post by SWAMPHUNTER45 »

If I had to bet more than 50% of the piston / head gasket and rod bearing problems with a Cadillac 500 are directly fuel related.

Ya best use good fuel and add some race fuel for insurance if your running 8.5 to 1 or higher in the heat with any real timing.

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radtech
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Re: Need 500 piston

Post by radtech »

Yep. I run av gas in the mix. I'll likely have to toss out the av gas i have on hand since it will be a year since purchase before I can use it

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Slidin Gator
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Re: Need 500 piston

Post by Slidin Gator »

SWAMPHUNTER45 wrote:
Mon Jun 22, 2020 6:14 pm
Ya best use good fuel and add some race fuel for insurance if your running 8.5 to 1 or higher in the heat with any real timing.
Swamp,

I will vouch for Radtech on this one, we both loaded up on 100 Octane AV gas before the last Mack's ride. He bought it to mix with 93 pump gas, I bought in bulk.

One thing he mentioned to me was a concern with mixing too much AV gas with the hi test based on someone telling him too much would raise cylinder temps. Does this make any sense?

That said, you could still be correct on this part:
SWAMPHUNTER45 wrote:
Mon Jun 22, 2020 6:14 pm
If I had to bet more than 50% of the piston / head gasket and rod bearing problems with a Cadillac 500 are directly fuel related.
Rad was having carb issues when he came down here. I could bad mouth a Caddy parts vendor (one THAT IS NOT Buddy Branch) but I won't. Suffice it to say that Rad had gotten screwed by a vendor who had sent him a seriously defective rebuilt Qjet carb. We took it apart and it looked like it had been hammered together by a team of monkeys. Just a couple of examples (how do you get aluminum shavings on the carb side of the filter??).

Image

Image

Unfortunately all I had was older model QJets so the jets would not interchange. We put the largest jets we had on hand into a carb off a mud truck. The boat ran great but was lean on the top end.

Radtech did exactly what most others (myself included) would do when starting a 2 week vacation. Screw it, let's go. :thumbleft:

I believe that 2 weeks of running lean is what started all of this.
I still think I-10 is the Mason Dixon line.
2013 Mike Stossel Boats, 13' x 7' deck over, IO-540, 74" NGQ less winglets.

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radtech
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Re: Need 500 piston

Post by radtech »

I'm sure you are correct, brother! There's also a high likelihood that my buddy at Seminole put crap gas in it while it was down there after the trip. In any case, yes! I will continue to use high test NE and add either av gas or racing fuel to it. The other issue it yo get it gassing right when it gets back together. Damn, I'm ready to be back on the water!!!

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Re: Need 500 piston

Post by SWAMPHUNTER45 »

The non-ethanol fuel is only 89-90 octane and to low. Some places stick 93 decals on their pumps but it is not 93 it is a scam. Almost all of it is 89 straight up.

Gator the AV fuel blending will help a little but the Branch shop no longer recommends it in anything but the low compression engines and at a 20% ratio. It just doesn't give enough octane and is what Mr B refers to as abrasive. Any higher than needed fuel can create a heat issue I am told.

Buy fresh 93 and blend with Sunoco Standard (110 Octane) it makes for a simple mix and is designed to be blended with pump gas.

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Re: Need 500 piston

Post by radtech »

They only problem with that is availability. You can't find racing fuel just anywhere around here. I think there are some places that sell the prefilled aluminum 1 gal cans of it like you can buy kerosene in, but that's about it within easy driving distance. I definitely try to keep the octane up. I occasionally use the non street legal octane boost you can buy at the auto parts store if i can't get anything else.

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Re: Need 500 piston

Post by SWAMPHUNTER45 »

You can go online and use a "Race Gas Finder" there are Sunoco outlets at almost every Circle track and some speed shops have pumps or can options. You don't need as much as AV gas and those add in boosters well I wouldn't recommend. Four gallons of fresh 93 and one gallon of Sunoco Standard 110 yields a boost to 96.4 so 10 gallons will last you a bit.

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Re: Need 500 piston

Post by One Eyed Gator »

Most speed shops carry VP racing fuel. VP has several different products that will work. Including some that are unleaded for those running an oxygen sensor.

Rollins in Gainesville has VP fuel.

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Re: Need 500 piston

Post by radtech »

Thanks, I'll look it up

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