12 # Boost Vs Stock Longblock (Pics)

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YtnGT

Founding Member

Sep 23, 2002

202

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0

TX

Apr 26, 2010

#1

• Apr 26, 2010

• #1

What more to say other than many years of nitrous and boost before the stock 2v longblock let go. I was at high speed WOT and bang a connecting rod or two let go. The stang has been down over a year waiting for $$$, now is the time.

The 4r70w is in great shape but the stock shortblock is toast. I can't wait for the forged longblock, 2.6L, and T65 to arrive.

 

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Y

YtnGT

Founding Member

Sep 23, 2002

202

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TX

Apr 26, 2010

#2

• Apr 26, 2010

• #2

More fun

 

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kuwait

Member

Mar 31, 2005

194

0

17

Apr 27, 2010

#3

• Apr 27, 2010

• #3

thats one banged up piston , glad to hear your rebuilding it , good luck with that

 

d98gt

Founding Member

Mar 14, 2002

4,505

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204

SE Texas

Apr 27, 2010

#4

• Apr 27, 2010

• #4

Where at in Tx are you located? How many miles were you running 12psi and who tuned it?

 

Maxpowers

Member

Sep 9, 2009

859

2

19

Pittsburgh, Pa

Apr 27, 2010

#5

• Apr 27, 2010

• #5

Did you have any supporting mods to go with the boost?

Looks like a nasty mess in there.

 

Rickyll7

Member

Dec 16, 2005

718

4

19

Apr 27, 2010

#6

• Apr 27, 2010

• #6

How much rwhp did you have? Was this due to detonation?

 

Y

YtnGT

Founding Member

Sep 23, 2002

202

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0

TX

Apr 28, 2010

#7

• Apr 28, 2010

• #7

I was running a MPH mongoose kit with V2-SQ 3.33" and vortech aftercooler. Of course the kit comes with 42# injectors, 90mm MAF, tune, and SVT focus pump. Plus I have a BAP and wideband commander.

The a/f did not go lean and no sign of detonation. It looks like my #8 connecting rod just had enough. With blower alone the car made 403 rwhp through a automatic.

Anybody want a MPH aftercooled mongoose kit or a 4r70w transmission...

I talked to Tim yesterady and they can still get the KB 2.8L for the 2v. So forget the 2.6 I'm going 2.8...

 

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StanginSean

New Member

Aug 19, 2008

23

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1

Apr 28, 2010

#8

• Apr 28, 2010

• #8

how much for the mongoose kit?

 

trinity_gt

10 Year Member

Jan 31, 2003

3,125

81

99

Canada

Apr 28, 2010

#9

• Apr 28, 2010

• #9

YtnGT said:

The a/f did not go lean and no sign of detonation.

Click to expand...

The piston with the broken ring land looks like it was hit hard by detonation. It's even broken in the right spot (opposite the plug).

 

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YtnGT

Founding Member

Sep 23, 2002

202

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TX

Apr 28, 2010

#10

• Apr 28, 2010

• #10

I will not rule out detonation, but looking at and disassembling the shortblock I am convinced that the connecting rod went first. Maybe the rod let go because of slight detonation, I don't know. All plugs are very close to .025" gap still. The broken piston is because of the broke connecting rod smacking the crap out of it as well as the cylinder wall, note huge hole in cylinder wall.

I have seen the result of bad detonation several times and plug electrodes seem to melt first, then pistons/rings. Regardless, I am very pleased with the mongoose kit. It's unfortunate that the 2v shortblock is weak.

I will probably sell the blower kit to a friend or put on ebay. The blower is in great shape. I removed it first and cleaned and re-lubed it right after the incident.

 

Y

YtnGT

Founding Member

Sep 23, 2002

202

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0

TX

Apr 29, 2010

#11

• Apr 29, 2010

• #11

Here is another pic.

I should have the longblock, blower, and transmission on order early next week. My spreadsheet of **** I need/want is getting longer. You have to be a crackhead to spend this kind of money on a mustang.

 

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