i hadn't noticed this until yesterday, but it looks like the pistons are right at .5mm out of the hole. this changes things a bit. i took the head in yesterday to have it checked and if everything is good, bigger valves installed. should find out next week.

im wondering what he PO had in mind when he had this block rebuilt.......

The piston pop-up is normal.  About 020", or 0.5mm.  The observation crops up here and there, for stock engines.  Doesn't seem to be spec'ed out anywhere but many people see it.

On 9/5/2016 at 8:16 AM, madkaw said:

More importantly I would measure deck height of Pistons . Unless they are waaayyyy out of the top of the block I would go with what ever cam you want. I'd say with reliefs you could go 550+


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what is waaayyy out? these are at .5mm

13 minutes ago, Zed Head said:

The piston pop-up is normal.  About 020", or 0.5mm.  The observation crops up here and there, for stock engines.  Doesn't seem to be spec'ed out anywhere but many people see it.

this has me wondering about piston-valve clearance if i go with a higher lift cam. just trying to wrap my head around it all. sooner or later it will click

Don't forget that the HG is ~ 1.25 mm.

If you search you will find -as Zed said- that this is about right. Run what you brung as far as cam. You should be fine.


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My take on your cam question is based on the cam I had reground.  The lobes are much smaller now, almost round.  So I don't see how they could push any of the valves further down than stock. They just stay open longer.

Not sure I agree with your explanation Cliff
There's guys running 500+ lift cams with flat tops with no issues.
Everything comes at a risk with performance parts . Things do get closer to clashing, but if installed correctly you should be okay. There are methods of measuring.
I actually shaved another .007 off my block so the Pistons are now .025 out of block- but I'm willing to take that risk


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so in the mean time while waiting on parts and stuff, i made a new alternator bracket and modified the tensioning strap. this is a 90 amp nipon-denso. car-quest #13185. i have one of these on my old power-wagon. it puts out 14+ volts at low rpm's

(650-700)

 

Never mind.  I checked out some Google images.  Looks plenty.  Why'd you install it on the AC bracketry instead of the original spot?

Edited September 29, 20168 yr by Zed Head

it was kind of cluttered there with the oil pump and radiator hose, and making a mount for this side was easier than modifying the original. and i like different

i have been waiting on parts to get the work on the cylinder head finished, so in the meantime........

voltage regulator  mid 80's Chrysler

temperature/oil psi gauges. i kind of like them here. i do trust mechanical over electric

new flame thrower coil

aluminum. gotta love it

intake all cleaned up with new linkage, just looking for a home

header sand-blasted, painted and wrapped. looking for a home

pcv valve connection welded onto the header. we shall see if this works. i also plan on o2 sensors

new differential straps. cost $6 for 6 feet of seatbelt material. the guy says this is good for around 2000 psi. we shall see

getting ready to drop the engine back in place

new centerforce clutch