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'78 Plymouth Arrow


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what happen. sad to see her down.

was it the same cylinder as the bad E3 plug?

 

 

so for Megasquirt your running the trigger wheel for now.

do you like it better then the other setup you ran?

you change MS setups more than anyone I know. LOL

Edited by importwarrior
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IW, I'm not 100% sure it is the same cylinder, but I think so.

in the picture they are either 1234 or 4321.

 

I like the crank trigger wheel a lot more than using the points in the distributor or the old HEI7 setup in the maroon flatty. I also like the coil packs in wasted spark a lot more than the distributor.

Wait until you see my next setup :D hint: i.t.b.

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Curious why 2/3 of your spark table is devoted to the boost range, I've always done it the other way around. Idea being using available resolution for driveability where you need some texture and leaving boost to have linear retard where it all tends to be linear anyway.

 

Way cool car by the way.

Edited by scott87star
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I already had driveablity dialed in, so i just scaled it back so I had more resolution for tuning boost.

I start with about 2/3 NA, then after that is dialed in, scale it 2/3 boost and get that dialed in.

In this case, it didn't really effect drivability to leave it lower res. I think because it is an automatic.

 

Thank you for the compliment.

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  • 1 month later...
  • 2 months later...

Shes back in the garage for "maintenance"

http://www.ilostmymind.com/upload/imag0216.jpg

 

This is why you need to boost any and all N/A engines you come in contact with:

http://www.ilostmymind.com/upload/imag0220.jpg

 

Now I know the first instinct is "you went lean". That would be an incorrect assumption.

AFRs were around low 12s high 11s when this happened.

The root of the problem is CARBON.

 

http://www.ilostmymind.com/upload/imag0218.jpg

 

See all the built up carbon? That's bad. Apparently carbon will stay "glowing hot" and cause a constant flame front which in turn melts the soft metals.

If I would have seafoamed this engine, it may still be alive today. I kind of figured running e85 through it for a few months would have broke the carbon loose, but I guess there was too much.

The head gasket was about to fail anyways

 

http://www.ilostmymind.com/upload/imag0219.jpg

 

Let the rebuild begin!

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Yeah, narrow block. A 4g63 will bolt up. Kind of. I already had one ready to go in, but the whole deal has to be moved about 1" forward (extended driveshaft, new motor/trans mounts), or the firewall has to get chopped up.

 

A g54b head will go on a g52b, a g52b head will not work on a g54b because of the egr setup (i believe, all hearsay)

 

I think I'll get the motor out and on a stand tonight to see what ALL I have to do.

 

btw, have you seen my Samurai as of late? check out http://www.ilostmymind.com/ I'm trying to keep that up to date.

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Here is the full on carnage! Avert your eyes if you are squimish.

http://www.ilostmymind.com/wp-content/uploads/2014/10/wpid-wp-1412817482426.jpeg

 

So off to the machinist they go.

http://www.ilostmymind.com/wp-content/uploads/2014/10/wpid-wp-1412817466778.jpeg

http://www.ilostmymind.com/wp-content/uploads/2014/10/wpid-wp-14128979955301.jpeg

They got the block, crank, rods, and an m28 head I plan to use. We'll see what we can make happen.

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  • 2 weeks later...

Thank you for your opinion screemin eagle.

But in the book "Performance Fuel Injection Systems" (hp1557) the desired AFR in boost is low twelves to mid elevens. I usually start on the richer side and then lean it out some. I try not to get into the tens if I can help it.

The arrow didn't like running pig rich when it was running a distributor. I never tried when I went DIS. Also, I get 93+ octane here in Michigan.

Either way, like I stated earlier in my thread, it wasn't a fuel related problem.

 

On another note, my parts have been shipped off to FFWD Connection for some nice ceramic and sst coatings. http://www.ffwdconnection.com/coatings.html

I am having the tops of the pistons and the face of the valves ceramic coated, and the skirts of the pistons and all the bearings SST coated.

I chose to get the bearings coated because the oiling system on the astron engines is not the most reliable for spirited driving.

The ceramic was chosen to prevent things like this from happening again, and keep the heat in the chamber and out of my intake.

This will be the 3rd engine I will have used ceramic/sst on. The first is still in use, the second broke a crankshaft.

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  • 2 weeks later...

http://www.ilostmymind.com/wp-content/uploads/2014/11/wpid-wp-14153385284653.jpeg

Yeah!!! wooo! Coated parts!

I sent my pistons/bearings/valves off to www.ffwdconnection.com to get coated. I got ceramic tops on and moly skirts on the pistons, ceramic valve faces, and moly on the main and rod bearings.

Now my parts are at Shaker Racing in Granger, IN. They are assembling/machining my head, and doing the machine work on my block (.20 over block, turn the crank 10/10 and balance, check/resize rods, put new pistons on rods)

I should have that back next week! yay!

Edited by button
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