Julian doesn't have anything on this... IP 1300whp breakage
04-29-2008, 02:09 PM
#1
Julian doesn't have anything on this... IP 1300whp breakage
We have really been pushing our green 350Z lately, now running 8's and over 160mph in the 1/4 mile. Keep in mind we did not go the stripped out race car route - our full interior Z weighs in at 3400 pounds.
This weekend we drove up to Atco NJ where we found the limits of the off-shelf BC stroker rods. At an estimated 1300whp, two rods came apart. Now we are working on a rod option that will hold 1500whp or more reliably.
We were very happy to tear this motor down and find the remains in excellent condition. My biggest fear on the VQ is keeping the crank in the bottom of it at high horsepower (which is why we have our girdle on the bottom). I was relieved to find everything in awesome shape. With over 100 single digit passes the bearings looked perfect, the mains were all still intact and free of fractures, and we never had any head lift issues with the stock-size L19 head studs.
A few pictures from the weekend and the carnage:
This weekend we drove up to Atco NJ where we found the limits of the off-shelf BC stroker rods. At an estimated 1300whp, two rods came apart. Now we are working on a rod option that will hold 1500whp or more reliably.
We were very happy to tear this motor down and find the remains in excellent condition. My biggest fear on the VQ is keeping the crank in the bottom of it at high horsepower (which is why we have our girdle on the bottom). I was relieved to find everything in awesome shape. With over 100 single digit passes the bearings looked perfect, the mains were all still intact and free of fractures, and we never had any head lift issues with the stock-size L19 head studs.
A few pictures from the weekend and the carnage:
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04-29-2008, 02:18 PM
#9
Awww crap - sorry to hear. 
But thanks for sharing and testing the limits of multiple pieces of technology.
Also I was hoping to see it in 2 wks at ZdayZ Top Dawg run.
Are those the two rear or two front? Any significance in your mind with the location? The other rods show no signs of failure?
Best wishes for a speedy block recovery! Thinking about Pauter perhaps, on the rebuild?
But thanks for sharing and testing the limits of multiple pieces of technology.Also I was hoping to see it in 2 wks at ZdayZ Top Dawg run.
Are those the two rear or two front? Any significance in your mind with the location? The other rods show no signs of failure?
Best wishes for a speedy block recovery! Thinking about Pauter perhaps, on the rebuild?
04-29-2008, 02:18 PM
#10
Originally Posted by jumpin800agl
wow that is just crazy. We may have a new winner for the title Parts murderer.
Rods
Block
Sleeves
1.25" Billet girdle
Starter
Upper oil pan
Crank trigger ring + sensor
Header
04-29-2008, 02:24 PM
#12
hatersgonnahate
iTrader: (162)
Originally Posted by rcdash
Are those the two rear or two front? Any significance in your mind with the location? The other rods show no signs of failure?
looks like the rear two based on the oil filter location in the pic.
04-29-2008, 02:31 PM
#14
Rods #5 and #6 broke on the small end. Both pins were still in the pistons, and one even looks undamaged. Rods and pistons 1-4 appear perfect, along with the crank. Oil pressure was good even as the block was flying apart.
I was going 85mph when it happened; thank goodness for the catch pan under the motor to catch most of the oil and allow me to get off the track safely.
Jayz - not sure yet. We will release details of the new motor when we have it finalized.
I was going 85mph when it happened; thank goodness for the catch pan under the motor to catch most of the oil and allow me to get off the track safely.
Jayz - not sure yet. We will release details of the new motor when we have it finalized.
04-29-2008, 02:37 PM
#16
Originally Posted by Sean
That is the greatest epic car motor kill I have ever seen.
Did you suddenly go lean before the shelling?
Did you suddenly go lean before the shelling?
04-29-2008, 02:43 PM
#17
Registered User
So much for pushing the limits..... I think Hal FOUND the limit!! Can't wait to see you guys come back better then before! 
Last edited by SlideFox; 04-29-2008 at 02:49 PM.
04-29-2008, 02:50 PM
#19
Originally Posted by Hal@IP
The datalog showed all was well: afr, timing, oil pres, knock, etc. Also no signs of foul play on the pistons.
Last edited by rcdash; 04-29-2008 at 02:57 PM.
04-29-2008, 02:58 PM
#20
It is going to look great out front by the walk with some flowers growing out of the cylinders 
I hit the spray at 1500rpm in 6th gear... could that be it? JK, but great guess. This happened at 7500rpm.
I hit the spray at 1500rpm in 6th gear... could that be it? JK, but great guess. This happened at 7500rpm.
Originally Posted by Julian@MRC
Darn expensive paperweight you got there Hal....
Were you guys spraying N20 to low??
Were you guys spraying N20 to low??