well... i finally get to

WanaDmaxsub

Junior Member W/gray hair
Feb 17, 2007
644
1
18
It was a chilly 42deg here this morning, I thought about digging out a jacket...but decided to rough it 'cause the predicted high was 80deg:D
 

malibu795

misspeelleerr
Apr 28, 2007
8,235
550
113
42
in the buckeye state
Lets see some more trip pics .
all these were taken some were between needles and MM 117 in new mexico were the plains end and the rockies begin. and htey are in order form west to east.

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ripmf666

Active member
Sep 20, 2006
15,123
14
38
47
Wentzville Mo
I don't think the engraving is wrong. Right and left pistons have their own CNC programs to cut the bowls and engrave. There is a .030 offset in the pin location so if the engraving was wrong, the bowls would also be cut off center.

It sounds like you have two pistons installed backwards. The motor will not bind, it will however change the rod angle on two cylinders.

The engine will physically run, what effect having the two pistons in backwards will have on the dynamics of the motor is anyone's guess.

This was a common practice in the 1960s. Engine builders would install all the flat top pistons in a SBC of SBF backwards in order to get a different rod angle at TDC and affect the leverage the rod exerted on the crank at TDC.

They felt it helped power.


Bump
 

delong_1

<< my work
Dec 5, 2008
1,282
0
0
38
Arvada, CO
So besides all of the oil leaks everywhere, is this going to blow up the first time i run it at 600+ hp

i just found this thread.:eek:
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
So besides all of the oil leaks everywhere, is this going to blow up the first time i run it at 600+ hp

i just found this thread.:eek:

So I guess adam didnt tell you it has two pistons in backwards, and he ran it without an EGT gauge the first time out, and it burned 1.5 qts of oil.........................................................???
 

delong_1

<< my work
Dec 5, 2008
1,282
0
0
38
Arvada, CO
he told me when he heard i was going to be pulling the heads to install my heads. thats why i started looking at this thread.
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
he told me when he heard i was going to be pulling the heads to install my heads. thats why i started looking at this thread.

he only told you after he knew you for a fact you were going to find out? Thats convenient...

"oh...by the way...I forgot to mention [since you wouldnt have ever found out if you werent planning on pulling the heads]...its nothing big, but I thought you should know..."

who knows how "interestingly" its worn things inside by now. JMO.

ben
 

malibu795

misspeelleerr
Apr 28, 2007
8,235
550
113
42
in the buckeye state
So besides all of the oil leaks everywhere, is this going to blow up the first time i run it at 600+ hp

i just found this thread.:eek:

oil leak is form a bad oil supply banjo seal that i replace. after i got back to ohio form cali. that what then oil down the back of then block is.

if then piston were in back ward it wont turn., if one does manage that you would rip then piston cooling jets off and damage the pistons and block.

now swap L to R banks it will thats what is/was done.

if then .030 wrrist pin was SO important why are the aftermarked pistons dead center???????????????

and ben...
they are probly really sooted form the lack of compression and air.. being guy flat top cut pistons .040 to weigh the same as normal delipped .020 overs

for those that dont know stock protursion is .012-.016 this engine when assembler avg .0055 out of the hole.
 

malibu795

misspeelleerr
Apr 28, 2007
8,235
550
113
42
in the buckeye state
I don't think the engraving is wrong. Right and left pistons have their own CNC programs to cut the bowls and engrave. There is a .030 offset in the pin location so if the engraving was wrong, the bowls would also be cut off center.

It sounds like you have two pistons installed backwards. The motor will not bind, it will however change the rod angle on two cylinders.

The engine will physically run, what effect having the two pistons in backwards will have on the dynamics of the motor is anyone's guess.

This was a common practice in the 1960s. Engine builders would install all the flat top pistons in a SBC of SBF backwards in order to get a different rod angle at TDC and affect the leverage the rod exerted on the crank at TDC.

They felt it helped power.

The bowl is still in the center of the piston. Only the rod offset will be different. Like Guy said its a old hot rodder trick. I don't think he will have any problems but it will be harder on the piston skirts in them cylinders. Just glad he got it running. Its hard to just let them site and not run. Jeff
i ahve talked with several circle track builders and they have said the same thing...
I guess that is what I was trying to say, the rod angle being differant. Thank you

While it may be hard to sit and look at something that you are so devoted to not get anywhere, spending $3,000 on rods and another $1,500 or more on pistons would be a damn good reason to take your time and do it right.

This is not a slam on anyone, I just wish you the best Adam I don't want to be reading in 3 months that you cracked a piston or something. Good luck buddy :joker:

he only told you after he knew you for a fact you were going to find out? Thats convenient...

"oh...by the way...I forgot to mention [since you wouldnt have ever found out if you werent planning on pulling the heads]...its nothing big, but I thought you should know..."

who knows how "interestingly" its worn things inside by now. JMO.

ben
your coming off pretty condensending ben...
it will look better then your feasco........
had the egt working never saw anything past 1700 even sled pulling... which is quite less then what YOU have done.

theres videos of what i put that engine and tranny through on youtube

and rough calculation with C gaskets puts CR in the 15:1 range with a stock turbo...
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
what do you mean it will look better than my 'fiasco'? That makes no sense and is totally unrelated.. My fiasco was inadequate parts failure. I didnt mess something up on assembly. Your fiasco was you put two flippin pistons in backwards, and even after people clued you in, you left it that way, plain and simple.

You said initially you didnt have an EGT probe hooked up.

1700* is less than I have done? I have twins. ;)
 
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