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Spun bearing after procharger install

Old 04-02-2015, 07:56 PM
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Pull pan and head install piston. Install a nice meth kit too.
Old 04-02-2015, 08:17 PM
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called that ****, black bear starter tune....shouldnt of been beating on it


sorry to hear
Old 04-02-2015, 08:49 PM
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1/2 throttle is beating on it? It never went past 4500 rpm
Old 04-02-2015, 09:35 PM
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Originally Posted by Delaware ss
1/2 throttle is beating on it? It never went past 4500 rpm
Does not matter if it was not tuned for it. In your original post you said you went 3/4 throttle and saw 8 psi. That is more than enough to hurt the engine without a proper tune.
Old 04-02-2015, 10:17 PM
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YIKES you had no tune? I read it wrong thinking you had a BB base boost tune
Old 04-02-2015, 10:46 PM
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Originally Posted by sierra416
Had the same thing happen to me when I installed my turbo. Checked everything. Couldn't find the problem. Tore apart block and found 7 of 8 rods bent. Those powder metal rods are junk. Never went over 4psi. Now it's honed and forged 416ci. Good luck with yours. Hopefully it's something inexpensive.

Piston slap - not my pic but this is what my rods looked like.
The rods are well documented to hold at least 700 rwhp. In fact, I'm still running on a stock bottom end for about 2.5 years boosted and many people make much more than me and go faster. Sounds to me like you had a bunk tune.

Tune and fuel are critical when it comes to boosted motors.
Old 04-03-2015, 02:13 AM
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Originally Posted by Delaware ss
1/2 throttle is beating on it? It never went past 4500 rpm
dude my blower sees 9 psi by that rpm even part throttle


cant blame anyone but yourself
Old 04-03-2015, 02:15 AM
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Originally Posted by GMCtrk
The rods are well documented to hold at least 700 rwhp. In fact, I'm still running on a stock bottom end for about 2.5 years boosted and many people make much more than me and go faster. Sounds to me like you had a bunk tune.

Tune and fuel are critical when it comes to boosted motors.
strong rod motor in our Notch....25psi+20* timing+ e85 +11.4afr+ 7300rpms thru traps
164mph@3400lbs

unless its a weak rod then stick around 750rwhp max for saftey
Old 04-03-2015, 03:41 PM
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Originally Posted by George C....
dude my blower sees 9 psi by that rpm even part throttle


cant blame anyone but yourself
Not blaming anyone, things happen with mods I understand that completely...
Just wanna know what's wrong and why so it doesn't happen again when I rebuild it. If it was just the tune that's fine I can live with that I had an appointment for a dyno tune and yes I probably should of just waited to drive it until after that I use see a lot of people using the bb tune and it working fine. I do lap percolate all the input. I'm pulling the head next week so I will see then how much I gotta do to fix it.
Old 04-03-2015, 03:51 PM
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