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Lets talk leakdown testing


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no names will be posted till i feel the need. and if you know whos this is just keep your mouth shut . i will be the one letting the cat out of the bag on whos cars it is and who screwed it up (IMO).

 

Now here are MY guage reading on a rather fresh engine... tuned, broken in correctly and so on...

 

#1

http://i5.photobucket.com/albums/y196/gearhead559/102_2539.jpg

20%.. IMO too much

 

#2

http://i5.photobucket.com/albums/y196/gearhead559/102_2541.jpg

16% still too much IMO

 

#3

http://i5.photobucket.com/albums/y196/gearhead559/102_2542.jpg

17%

 

#4

http://i5.photobucket.com/albums/y196/gearhead559/102_2544.jpg

22%

 

#5

http://i5.photobucket.com/albums/y196/gearhead559/102_2547.jpg

25%

 

#6

http://i5.photobucket.com/albums/y196/gearhead559/102_2548.jpg

HOLY SHAT NO LEAK!!!! This IMO is big deal. you should have atleast 5-10% due to ring gap

 

#7

http://i5.photobucket.com/albums/y196/gearhead559/102_2549.jpg

11% the only good one i see here

 

#8

http://i5.photobucket.com/albums/y196/gearhead559/102_2550.jpg

18% still IMO too much

 

fresh engine guys with less then 2000 miles on it.

 

with proper oil changes and what not, none of the above look good to me except #7. Now on with number 6, i am thinking either the rings where not gapped , or the ring swelled and melted together, or the bore is to small!

with the rest of these im thinking bore is to big, or rings are over gapped or just plain poor sealing, for what ever unknown reason. now i can't tear this down due to the guy that did all the work will not allow tear down but only bye him. now granted he did not install the heads on the motor, he built the short block and redid the heads. I am bringing this here for a few reasons.#1 its a members car , #2 i am gathering opinions on this, because the one that did most of this told the member that he detonated this engine, and that why it has excessive BLOW BY.(im calling BS) during leak down i only had air coming thru the oil cap and so much so it pushed the dip stick out! NO leak thru the exhuast or intake. Most of the plugs show signs of oil burning.(will post pics of plugs in a minute or so) NO oil in the intake stream any where.

 

discuss!

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spark plugs(im not sure if they are in the correct order but other then that is what i am told at this point! seems to be right!

 

1 thru 4

http://i5.photobucket.com/albums/y196/gearhead559/102_2553.jpg

 

5 thru 8

http://i5.photobucket.com/albums/y196/gearhead559/102_2554.jpg

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What did the engine builder set ring gap at per inch of bore.

it was supposed to be setup for super charger. i wish i could tear it down but he wont warranty anything if someone other then him does it :confused:

 

id like to get out my bore gauge and see whats up inside.

 

edit: this engine has had bad blow by for the last few weeks.

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I didn't do it.....

 

might be ok for a loose ring drag car.... might

 

anything else its hoed

in drag cars to reduce drag they make the rings thinner. for less drag ;)

 

 

my big spray motor's are no more then .022-.028 ring gap. and dont have that much leakdown.

 

 

(engine builder say 15-20% will be normal) yeah if you want tons of blow by and burn oil

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it was supposed to be setup for super charger. i wish i could tear it down but he wont warranty anything if someone other then him does it :confused:

 

id like to get out my bore gauge and see whats up inside.

 

edit: this engine has had bad blow by for the last few weeks.

 

 

Not much else to do than to tear it down. Since only he will tear it down , I suppose thats the end of that.

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I did it, 3 times. I'll do it again too.

 

Fuck 15-20%, something is definitely wrong with that build(er).

all i am going to say is its a machine shop that gets praised on here(bye some) the forum member should be talking to said machine shop tomarrow to see which ways this is going to go.

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