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All this engine talk

Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=48167
Printed Date: April-29-2024 at 9:15am


Topic: All this engine talk
Posted By: Gary S
Subject: All this engine talk
Date Posted: October-23-2019 at 12:59am
Got my GT40 block back today after spending only a month in the shop. Number 8 had been burned so bad that pieces had ended up in the tops of other pistons in addition to aluminum stuck to the cylinder wall. On initial inspection it was thought that maybe the block could be saved without a bore but in the end .020 was needed. I'd bet in times past .003 Ford pistons could have saved it but now days I'm told it is getting hard to find regular common pistons let alone special Ford service ones. Ended up with Speed Pro hypereutectic aluminum ones with Total Seal moly rings. Without even mentioning it to the machinist he told me,after he had found them,that these pistons were for the early Ford Lightning trucks. Crank only needed a polish,deck was fine- even the cam bearings passed muster. Not much to show since I don't want to unwrap it until it's ready to go back together in the spring,but here a couple of shots-











Alot of parts to clean and paint, still have some to go but I'm done painting for the year. No fancy colors just the original black









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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport



Replies:
Posted By: MrMcD
Date Posted: October-23-2019 at 4:11am
Sealed Power did make the pistons for the Lightning Trucks and they had a supercharger so the pistons saw a lot of horsepower and held up just fine.
Did you discover why your piston detonated and failed?
Your parts are looking good.
Mark

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Posted By: KENO
Date Posted: October-23-2019 at 7:49am
Originally posted by MrMcD MrMcD wrote:

Sealed Power did make the pistons for the Lightning Trucks and they had a supercharger so the pistons saw a lot of horsepower and held up just fine.
Did you discover why your piston detonated and failed?
Your parts are looking good.
Mark


The Chevy guy is mixing up his lightning engines and superchargers

There wasn't a 351w Lightning with a supercharger from the factory.


Posted By: Gary S
Date Posted: October-23-2019 at 10:37am
Unfortunately with the top end already disassembled by a PO there are no obvious signs. Head gaskets gone, along with injectors. Seems odd the injectors are missing but a box of new Motorsport 24 lb ones were included so those along with new pumps and careful assembly I’m thinking it should be fine. Unless anyone can think of something else.

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: 67 ski nat
Date Posted: October-23-2019 at 12:07pm
Very nice. Its gonna be nice looking to. Enjoy


Posted By: phatsat67
Date Posted: October-23-2019 at 12:56pm
What’s this going into Gary ?


Posted By: Gary S
Date Posted: October-23-2019 at 1:00pm
The Shamrock Zach, I even found the fresh water cooling parts to go with it.

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: tryathlete
Date Posted: October-23-2019 at 2:10pm
Wow that’s a nice upgrade for the Florida boat! Did you consider going Chevy for parts availability down the road? That burned/detonated piston top must have gone lean—something Alan warned me about my GT40 when he was visiting Deep Lake.


Posted By: Orlando76
Date Posted: October-23-2019 at 2:11pm
What’s this “Spring” talk Gary? There’s no difference in our seasons. Oh, you must be up north and not around the Conch Republic. Don’t make your Shamrock too nice, I’ll be on a budget when you sell it to me.

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Please support The Cystic Fibrosis Foundation
1976 Ski Nautique 351 Escort
1993 Ski Nautique purple and black 351 HO PCM


Posted By: phatsat67
Date Posted: October-23-2019 at 2:34pm
Very nice, I was thinking, uhhh I hope he’s not rebuilding the super sport motor already haha.


Posted By: MrMcD
Date Posted: October-23-2019 at 2:41pm
Keno, you are correct and memory failed me once again.   
I remember the engineering guys were jumping through hoops trying to determine if the engine bearings we supplied would hold up against 500 HP. These were bone stock bearings, not performance bearings.   The Lightning never made 500 HP at the crank but the bearings were exposed to the load of an estimated 500 HP because the engine had to turn the Supercharger driven from the front of the crank while driving the car out the rear of the crank. Supercharger load at 5,500 RPM was estimated to be nearly 100 HP.
That engine was actually the 5.4L over head cam engine rated either 360 or 380 HP with supercharger and did not come out till 1999, it was not the 351W.

The 351W Lightning was rated a wopping 240 HP but in the smog engine years that was a lot. Odd that our GT40 Pro Boss 351W from the same time frame was rated at 310 HP and is basically the same engine..
Could be the Ford HP Rating was the modern SAE? HP rating and the Marine version was the older method.
The older method measured HP at the crankshaft with no accessories mounted and open exhaust, the newer method, I think they call it the SAE method measures with all components on the engine and factory Air Cleaner and exhaust.   The more realistic engine measurement started in 1971 for Automotive use. HP estimates dropped by about 20% under the new measurement process.
Sealed Power not only made Pistons for Ford but also for GM and Mercury Marine, all the 383 Engine stroked 350's that Mercury Marine sold had Sealed Power Hypereutectic Pistons. They work very well in Boat applications.

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Posted By: Donald80SN
Date Posted: October-23-2019 at 3:15pm
Originally posted by phatsat67 phatsat67 wrote:

Very nice, I was thinking, uhhh I hope he’s not rebuilding the super sport motor already haha.


This was my concern too.

I was also thinking you might be putting it in the SS Mustang. Pulling out that old hard to find parts for Ford Motor that is in it.   

Donald

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1980 Ski Nautique SOLD Back to Cypress Gardens
2002 Sport Nautique, GT-40, FCT2, Cover Sports, Tower Bimini, Inc., Wet Sounds Audio System, Star Gazer Wake Edition S.
1968 Ski Nautique, Project.


Posted By: tryathlete
Date Posted: October-23-2019 at 5:51pm
Originally posted by Donald80SN Donald80SN wrote:

Originally posted by phatsat67 phatsat67 wrote:

Very nice, I was thinking, uhhh I hope he’s not rebuilding the super sport motor already haha.


This was my concern too.

I was also thinking you might be putting it in the SS Mustang. Pulling out that old hard to find parts for Ford Motor that is in it.   

Donald


That would make for a very fast Mustang.


Posted By: tryathlete
Date Posted: October-23-2019 at 5:51pm
How are you going to deal with the fuel/tank return?


Posted By: Gary S
Date Posted: October-24-2019 at 1:06am
The Mustang is safe with it's HM guy's. Stuck with the Ford because I feel I have more of a handle on them to keep them going. Plus my 95 has always impressed me with the way it runs. And with two I'll have to keep less extra parts around which will keep costs down.
As to a fuel return I'm thinking a Y into the fuel fill pipes,I have heard problems with using the vent line as a return they sometimes spit fuel out back. Something I need to check out because the vent would be easier.


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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: phatsat67
Date Posted: October-24-2019 at 2:14pm
Gary, pcm at one point was making a fuel sending unit with a return plumbed for EFI re powers. I drilled and tapped a standard sender for a Re power we did at N3 before those were available. I’d go hard plumbed like that if it’s not too much of a pain.


Posted By: tryathlete
Date Posted: October-24-2019 at 2:31pm
We don’t want any Florida Man boat fire stories from your neck of the woods!

https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Ftse4.mm.bing.net%2Fth%3Fid%3DOIP.tE-URWylL-x_mp65HLqLtwHaEB%26pid%3DApi&f=1" rel="nofollow - Fire in the hole!


Posted By: 8122pbrainard
Date Posted: October-24-2019 at 2:51pm
Originally posted by phatsat67 phatsat67 wrote:

Gary, pcm at one point was making a fuel sending unit with a return plumbed for EFI re powers.

I have a feeling PCM purchased them and then marked them ^^

This is a Moeller part

]

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: Gary S
Date Posted: October-24-2019 at 3:34pm
Good idea but.... early Shamrocks were built on the concept of simple and easy service, the original builder was a mechanic who decided he could build a mechanic friendly boat. They came with no fuel senders but were supplied with a stick with graduations marked on it. Very accurate unless you lose the stick
The other problem is there are two tanks so you need valving to pull and return to the same tank. Dad replaced the tanks years ago when he brought it north otherwise if I needed new ones I’d just have a bung welded in. Some had diesels in them so I’m sure it has all been done before. There is a guy in Tampa who was one of the original employees of Shamrock and still supplies most parts sourced from the original companies who supplied Shamrock, recently even acquiring deck and hatch molds. I even understand their 17 foot models mold is available, I think Reid still has his 17

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: 8122pbrainard
Date Posted: October-24-2019 at 4:25pm
Originally posted by Gary S Gary S wrote:

, the original builder was a mechanic who decided he could build a mechanic friendly boat. They came with no fuel senders but were supplied with a stick with graduations marked on it.

He didn't invent the idea.



Gary,
So now with dual tanks, you'll need two valves?

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: MrMcD
Date Posted: October-24-2019 at 5:37pm
My 78 Nautique Gauge worked but was not very accurate.   I made a stick like the ones in your pictures and that stick let me use the full tank of gas even though my gauge would say I was empty when I had 1/3 still in the tank. Handy and easy to use as Pete said.

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Posted By: KENO
Date Posted: October-24-2019 at 6:02pm
I think some caveman came up with this "measuring stick" idea long long ago before gas tanks ever existed.


Posted By: Gary S
Date Posted: October-24-2019 at 7:16pm
Well Pete I did not say he invented the stick - his concept was to keep everything easily accessible to work on.- no fuel senders, no problem with them going bad. The idea worked until people wanted more. In the end just before he sold the company their flagship model was a Grand Slam,a 31 foot 11.25 beam twin. 454 or Cummins powered. Not so simple to work on that’s for sure.
As to the valve,I believe Moeller makes what I need, I’ll have to look can’t remember off the top of my head.

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: 8122pbrainard
Date Posted: October-24-2019 at 9:00pm
Originally posted by Gary S Gary S wrote:

Well Pete I did not say he invented the stick -

Gary,
Sorry, my fault in a poor choice of wording. In no way was I trying to insult his choice of using the stick method. My Atom has a handy yard stick in it.

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: Gary S
Date Posted: October-24-2019 at 10:54pm
No problem Pete. I'm impressed with Chris Craft's stick,pretty fancy. Found the link for the valve it's a Groco https://www.groco.net/products/valves-seacocks/fuel-valves/fv-6-port-series" rel="nofollow - link

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: desertskier
Date Posted: October-24-2019 at 11:28pm
Looks like the dipstick we used on the 400 gallon houseboat toy tank. Damn it was painful to fill that thing up. I was always surprised how accurate it was.


Posted By: jbear
Date Posted: November-06-2019 at 1:48am
Gary are you guys south of us already?



john

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"Loud pipes save lives"



AdamT sez "I'm Canadian and a beaver lover myself"...



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