Build a Lightning Bronco?

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Carnut1
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Re: Build a Lightning Bronco?

Post by Carnut1 » Thu Oct 22, 2015 12:05 pm

wyrmrider wrote:get different gaskets???
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Re: Build a Lightning Bronco?

Post by Carnut1 » Thu Oct 22, 2015 12:22 pm

I did find some 4.03 .027" head gaskets. That would help. Will see if Mikey has the bucks.
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Re: Build a Lightning Bronco?

Post by wyrmrider » Thu Oct 22, 2015 3:14 pm

would he rather deck the block?
did the scribes show it to be square?
did you try swapping the pistons on the rods to even things out?
I'm not looking at your photo now but the low or high pistons are not on the same throw are they???
gaskets are cheaper than detonation and having to retard the spark to prevent it

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Re: Build a Lightning Bronco?

Post by Carnut1 » Thu Oct 22, 2015 6:10 pm

wyrmrider wrote:would he rather deck the block?
did the scribes show it to be square?
did you try swapping the pistons on the rods to even things out?
I'm not looking at your photo now but the low or high pistons are not on the same throw are they???
gaskets are cheaper than detonation and having to retard the spark to prevent it
The decks are not perfectly square according to the notations on block. I do like the idea of jiggling some rods for a better quench. Mikey seems to be rich and is ordering .027 gaskets. It's like a party!
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Re: Build a Lightning Bronco?

Post by 4 nomor » Fri Oct 23, 2015 7:12 am

It might be worth the time to swap #1 and #6 rod/piston assemblies just to see where you end up..

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Re: Build a Lightning Bronco?

Post by Carnut1 » Fri Oct 23, 2015 8:28 am

4 nomor wrote:It might be worth the time to swap #1 and #6 rod/piston assemblies just to see where you end up..

As it works out most of my equipment is packed for a move so my press is not here. Not very familiar with which holes will switch without poping the pistons off the rods. Thanks for your help. I think you are on the right track. With .027 gaskets and some piston placement this could work!
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Re: Build a Lightning Bronco?

Post by 4 nomor » Fri Oct 23, 2015 8:33 am

No need for a press if your just checking things out. Just swap the two pistons and rod assemblies together making sure the chamfer on the rod big end faces the right way. It won't matter if a piston winds up backwords for checking purposes... After swapping, check the deck heights to see if its worth your time to break out the press to perminantly move the pistons..

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Re: Build a Lightning Bronco?

Post by Carnut1 » Fri Oct 23, 2015 11:44 am

4 nomor wrote:No need for a press if your just checking things out. Just swap the two pistons and rod assemblies together making sure the chamfer on the rod big end faces the right way. It won't matter if a piston winds up backwords for checking purposes... After swapping, check the deck heights to see if its worth your time to break out the press to perminantly move the pistons..
I will work on that next week. Thanks!
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Re: Build a Lightning Bronco?

Post by wyrmrider » Fri Oct 23, 2015 1:58 pm

If you can get the quench distance down without screwing with the pistons do so
check pin bores to piston deck with some calipers
if they are different most likely you will not come up with much unless someone really screwed with the rods
are they rebuilt, caps cut etc, new bushing- no you have pressed pins
someone would have had to cut the caps very differently
if that happens you have another problem- qc of your machine shop
new bolts?

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Re: Build a Lightning Bronco?

Post by Carnut1 » Fri Oct 23, 2015 2:27 pm

wyrmrider wrote:If you can get the quench distance down without screwing with the pistons do so
check pin bores to piston deck with some calipers
if they are different most likely you will not come up with much unless someone really screwed with the rods
are they rebuilt, caps cut etc, new bushing- no you have pressed pins
someone would have had to cut the caps very differently
if that happens you have another problem- qc of your machine shop
new bolts?
These rods were rebuilt with ford football bolts when the engine was last rebuilt in 2005. I did torque each rod and check for roundness. All where in good shape. I have had bad luck pressing off hyper pistons. I have had one crack. I wanted to use these hyper pistons so I decided not to rebuild the rods again. They should be plenty stout for this build.
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Re: Build a Lightning Bronco?

Post by wyrmrider » Fri Oct 23, 2015 4:57 pm

without screwing with the pistons
what I said
especially cast and more especially hypers
good enough with the new gaskets
perfect next time

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Re: Build a Lightning Bronco?

Post by Carnut1 » Fri Oct 23, 2015 6:01 pm

wyrmrider wrote:without screwing with the pistons
what I said
especially cast and more especially hypers
good enough with the new gaskets
perfect next time


I am sure I can equalize the quench a bit without taking pistons off rods and doing some test fitting and measuring. Thanks.
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Re: Build a Lightning Bronco?

Post by Carnut1 » Tue Oct 27, 2015 7:34 pm

20151027_160042.jpg
Some remeasuring and swapping 5/6 worked out well.
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Re: Build a Lightning Bronco?

Post by Carnut1 » Tue Oct 27, 2015 7:37 pm

20151027_160108.jpg
Leasson learned, do not check piston height at dusk! Better light and better measuring of heights.
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Re: Build a Lightning Bronco?

Post by Carnut1 » Tue Oct 27, 2015 7:42 pm

20151027_161046.jpg
Cometic mls gasket. .027 compressed thickness. Quench worked out between .0355 and .039. Which will be nice in this build.
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