520 CI Stroker 440 Engine Problems In 1967 Fury

[not so famous bob]

I know this is a B-body forum… and I already posted this on the C-body forum 6 years ago in 2019, but I figured I would also post this here to get all of your help thoughts and opinions on this to hopefully finally get this car running right. My stepdad has a 1967 Fury II 2-door sedan with only 400 miles on it and a 440 stroked to 520 cubic inch big block built by the late Nick Wilson of Comp-U-Flow 25 years ago; it has aluminum heads, an aluminum intake, aluminum radiator, electric fans, an Edelbrock 750cfm carburetor, phenolic carburetor spacer, roller cam, TTI headers with a complete exhaust system, an Advance Auto Parts electric fuel pump, electronic ignition by Rick Erenburg, and a slightly higher 10.5 compression ratio. The engine has given my stepdad nothing but trouble and has not run right since he installed it in the car. It would run like a bat out of hell when its cold and do great burnouts, then it would get hot and want to stall. First it started with honing out the cylinders because they were too tight, then it was the carburetor, then it was the coil, then it was the distributor. Nothing but a pain in the a$$. My stepdad went through 3 coils and 3 carburetors, and he says everything is new. It ran great, then it didn’t, then it ran great when we put it away last November, and now it won’t run right again. My stepdad took it out yesterday when it was 98 degrees and it seems like we are back to square one again where it idles lopey like it wants to stall then it does wicked burnouts then it stalls again. I just don’t understand it. It runs, then it doesn’t, then it runs, then it doesn’t. My stepdad is a good mechanic and can work on a regular 440 no problem, BUT he is new to high performance stroker engines. I have been told it could be vapor lock on the C-body forum, I have been told it could be ignition, I have been told it could be fuel.

Here are pictures of the car, the engine, and the post I made on the C-body forum. My stepdad spent GOOD money on this engine and he is so fed up with it he is planning to rip it out and put another engine in the car, and I would like to possibly help him out because I would hate for him to rip it out if it is something small and stupid after spending all of that money.

Any help or opinions would be appreciated!

Thank You In Advance.


The car….
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The 520 stroker engine….
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The post….

67 Fury 440 Engine Problems

first place that carb is WAAAAY to small for that engine , probably a fuel shortage when hot ..................................

 

[Texas97]

Hello… honestly no, no real updates. My stepdad has not done anything to the car since I originally made this post, except move it out of the garage a couple of times to move it around. However he says he plans to work on the car soon, and he plans to put a tamer cam in it as his last attempt to keep the engine. He talked with his high performance car mechanic friend Bill Atwood (for those of you in New England have likely heard of) who works on these types of things, and he says its likely normal and that its “the nature of the beast”.

i don't think new camshaft is going to fix these issues

 

[Don Frelier]

first place that carb is WAAAAY to small for that engine , probably a fuel shortage when hot ..................................

It should idle with just about any size carb.

 

[PRHeads]

He talked with his high performance car mechanic friend Bill Atwood (for those of you in New England have likely heard of) who works on these types of things

Bill should be able to get it sorted out

 

[66ChargerHI-PO]

Bill should be able to get it sorted out

Sadly, he’s already tried

 

[MarPar]

Sadly, he’s already tried

 

[PRHeads]

Sadly, he’s already tried

I’m surprised. Seems like it would be right up his alley.

 

[66ChargerHI-PO]

Hi Everyone,

Thankfully Mark (or @65CopCar) is generous enough to likely and hopefully come over to help us with the car Thanksgiving weekend when he comes to visit family. Thank you in advance Mark for hopefully helping us out. I have an update on the car though and we thought it was a good one… but unfortunately its not. My stepdad said he advanced the timing alittle bit and he also adjusted the idle speed accordingly, I asked what he adjusted them to and he said he had no numbers he just wang it… Facepalm. He took his friend out in it the other day last week and it ran great with no idle problems or anything so we figured maybe its fixed and its fine now, so that said we took it to a local 7 mile round trip cruise night tonight in town and it ran great with no problems going there! Wooohooo we thought, well… coming home was a different story. It was running great then we get back home and it dies when we pull it in the driveway to park it in the garage. My stepdad tries to restart it and it cranks over a minute and refires, then my stepdad goes to put it in drive to put it away and it dies. He turns the key off and puts it in neutral then refires it and the same thing happens where he puts it in drive then it dies, so we pushed it in the garage. When it refired the first time to put it away the idle rpm was higher than normal as well.

 

[Orig69]

Hi Everyone,

Thankfully Mark (or @65CopCar) is generous enough to likely and hopefully come over to help us with the car Thanksgiving weekend when he comes to visit family. Thank you in advance Mark for hopefully helping us out. I have an update on the car though and we thought it was a good one… but unfortunately its not. My stepdad said he advanced the timing alittle bit and he also adjusted the idle speed accordingly, I asked what he adjusted them to and he said he had no numbers he just wang it… Facepalm. He took his friend out in it the other day last week and it ran great with no idle problems or anything so we figured maybe its fixed and its fine now, so that said we took it to a local 7 mile round trip cruise night tonight in town and it ran great with no problems going there! Wooohooo we thought, well… coming home was a different story. It was running great then we get back home and it dies when we pull it in the driveway to park it in the garage. My stepdad tries to restart it and it cranks over a minute and refires, then my stepdad goes to put it in drive to put it away and it dies. He turns the key off and puts it in neutral then refires it and the same thing happens where he puts it in drive then it dies, so we pushed it in the garage. When it refired the first time to put it away the idle rpm was higher than normal as well.

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It would be a better idea to fix the vacuum leak first which only takes 25 minutes and then try and tune the engine afterwards.

 

[Geoff 2]

Could be carb flooding. Do you have a filter?