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  • 1996 - 2004 SN95 Mustang -General/Talk-

Well the motor blew up tonight...

  • Thread starter Thread starter SHOWTIME!!
  • Start date Start date Feb 5, 2009
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SHOWTIME!!

New Member
May 14, 2008
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Feb 5, 2009
#1
  • Feb 5, 2009
  • #1
We finally got my nitrous lined out tonight, so we go out for a test drive. The bottle pressure is at 1000psi. I do a 3rd gear pull and the car is pulling really hard. I decide to run threw the gears from 2nd, i nail it in 2nd and go to hit third and boom. It starts sounding like an exhaust leak and it has a dead miss. We pull the number 1 plug out and it has the entire top burnt off, we change all the plugs, still has a miss. We change the coil pack, still has a miss. Long story short we did alot of test and everything had the same result, dead miss. So i go and get a compression test gauge and sure enough, 10psi in cylinder 1. It already has a forged crank so im keeping it. I think im going to put some good rod bearing and buy some forged pistons that will bump the compression up a little, get my machine work done and maybe throw some cams in it. I would buy heads but i dont have that kind of money.
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
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39
UCSD/La Jolla
Feb 5, 2009
#2
  • Feb 5, 2009
  • #2
Jesus, everyone is building new shortblocks now (ironically mostly nitrous guys). Am i the only one who builds up BEFORE the poweradder? I guess if it doesnt ruin the block or heads you're not losing anything that wouldn't be replaced anyways though.

Keep us updated, man!
 
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SHOWTIME!!

New Member
May 14, 2008
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Feb 5, 2009
#3
  • Feb 5, 2009
  • #3
We only had a 100 shot on it. Had 2 degrees of timing out of it also. I dont see why it would have put a hole in the piston. It just doesnt make sense, there isnt a v-8 out there that can't handle a 100 shot (well aparantly there is now! haha)
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
4
39
UCSD/La Jolla
Feb 5, 2009
#4
  • Feb 5, 2009
  • #4
100 dry shot? Maybe you peaked fuel duty cycle? Or, all it takes is a bad fuel filter or pump and kablammy.
 
C

CatmanJJ

Captain Tangnet
20+ Year Stangneter
Feb 5, 2002
4,379
1
68
Maryland
Feb 5, 2009
#5
  • Feb 5, 2009
  • #5
That sux, mine has been sitting since end of October as well waiting for a rebuild.
 
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SHOWTIME!!

New Member
May 14, 2008
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Feb 5, 2009
#6
  • Feb 5, 2009
  • #6
CobraRed_96_GT said:
100 dry shot? Maybe you peaked fuel duty cycle? Or, all it takes is a bad fuel filter or pump and kablammy.
Click to expand...

No it was a wet kit.
 

deftsound

Please ask me how much my supercharger cost
Apr 6, 2004
945
1
39
Texas City TX
Feb 5, 2009
#7
  • Feb 5, 2009
  • #7
Next time get it tuned before you gas it
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Feb 5, 2009
#8
  • Feb 5, 2009
  • #8
What fuel pump are you running? What jets? Did you remove the performance tune and then pull 2* or pull 2* from the performance tune?

SHOWTIME!! said:
We only had a 100 shot on it. Had 2 degrees of timing out of it also. I dont see why it would have put a hole in the piston. It just doesnt make sense, there isnt a v-8 out there that can't handle a 100 shot (well aparantly there is now! haha)
Click to expand...
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Feb 5, 2009
#9
  • Feb 5, 2009
  • #9
That sucks man, how many miles were on the motor?
 

02nightmaregt

To hell with your Mustang, I want to see your HOG!
Jul 1, 2007
513
4
19
Southern Indiana
Feb 5, 2009
#10
  • Feb 5, 2009
  • #10
Damn that blows. I haven't even tested my N2O yet. I'm waiting till i get all the safety parts first, and a wideband.
 

02LaserRed2V

New Member
Jul 30, 2004
379
1
0
Augusta, GA
Feb 5, 2009
#11
  • Feb 5, 2009
  • #11
Congrats! I think lol
 

Poisoned Pony

Founding Member
Dec 17, 2000
286
0
17
Citrus Heights, CA
Feb 5, 2009
#12
  • Feb 5, 2009
  • #12
CobraRed_96_GT said:
Jesus, everyone is building new shortblocks now (ironically mostly nitrous guys). Am i the only one who builds up BEFORE the poweradder? I guess if it doesnt ruin the block or heads you're not losing anything that wouldn't be replaced anyways though.

Keep us updated, man!
Click to expand...

half the fun is blowing up the stock stuff 1st
 
O

Omars96GT

New Member
Sep 12, 2008
3
0
0
Feb 5, 2009
#13
  • Feb 5, 2009
  • #13
maybe you had the wrong fuel jet or fuel pump is not working right..... also i always step up a little the fuel jet so if the kit says put a 34 for fuel i put a 36. remember its better to be rich then lean lol
 
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SHOWTIME!!

New Member
May 14, 2008
15
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Feb 6, 2009
#14
  • Feb 6, 2009
  • #14
it had a 34 fuel jet and a 51 nitrous jet. It was running on the stock fuel pump that was replaced about 40k miles ago. The timing was set at stock. Do you think that the fact i was running a platinum plug might have had something to do with it? I found a teksid aluminum block, cobra forged crank, forged H beams, and forged pistons. I also got a set of hogged out PI heads. Believe it it not ( i believe it because i saw the flow charts) these heads flow a little over 250cfm @550. He said he has about $1500 in port work in them. Im also going to buy a set of cams, do you think i still should go with the HiTechs or should i step it up a little bit to a bigger cam with that much flow and a 150 shot?
 
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Nitrous03GT

New Member
Nov 21, 2008
17
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0
Feb 6, 2009
#15
  • Feb 6, 2009
  • #15
first we need more info...you say you "nailed it in 2nd" what RPM did you nail it from? 1k? 2?

there is no way you should have blown the motor on the first test runs on a 100shot unless a) your motor was already poop
b) you installed in wrong
c)your timing wasnt stock
d)you shot the juice too low in the revs

and yes, get rid of plat. plugs, run 1-2 steps COLDER copper plugs.


also, dont go messing around and mix matching jet sizes either, you'll either get it wrong or run so rich that you make less power than you would on a smaller shot in the first place.

i've run probably over 150 30# bottles of straight 125 shot with NO tune and no fuel system upgrades through my motor with ZERO issues. n20 is safe for an engine as long as it is properly setup and run.
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Feb 6, 2009
#16
  • Feb 6, 2009
  • #16
I would bet the fuel pump wasn't sufficient. You already had a good number of mods, probably taking you to around 300 at the crank. Then, add 100hp of nitrous and the stock fuel pump just couldn't supply enough fuel.
 
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Nitrous03GT

New Member
Nov 21, 2008
17
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Feb 6, 2009
#17
  • Feb 6, 2009
  • #17
the only real power mods he has when he is on n20 is the hpipe, plenum and TB, he's nowhere near 300 at the crank and even then a 100shot isnt going to bump him over the fuel limits

i'm running- demolet intake, plenum/tb, pulleys, prochamber and catback as my power mods and i'm not near 300crank HP on motor and i run a 125 shot that makes 376hp at the wheels and have no issues..

it comes down to something wasn't right, either motor was already dying, n20 wasn't installed right, sprayed too low ect...
 

Stark77

Member
Jun 11, 2008
501
0
16
Tallahassee, FL
Feb 6, 2009
#18
  • Feb 6, 2009
  • #18
Agreed - I run a 125 wet shot with no problems on stock block.
 
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SHOWTIME!!

New Member
May 14, 2008
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Feb 6, 2009
#19
  • Feb 6, 2009
  • #19
I was at 3500rpm when i sprayed it both times. I didnt miss match the jets, that's how summit racing sent them to me. No as for it being installed right that's where in my opinion something went wrong. I didnt install this kit, i dont know how to install nitrous. I took it to a friend of mines shop and dropped it off for him to do it. Everything looked fine but where the shark nozzle is located at. He put it on the throttle body, like he drilled into my throttle body and that's where he mounted the nozzle. I had asked him if that was to close and he said "No man it's fine, that just means it will hit harder". We argued about it and argued about it and finally he said "Fine lets go make this nitrous pass and then we will move it". Well you know the rest of the story after that.
 
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Nitrous03GT

New Member
Nov 21, 2008
17
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Feb 6, 2009
#20
  • Feb 6, 2009
  • #20
where in the TB did he drill it? i dont know that it would cause failure having it drilled there UNLESS the nozzle obstructed the butterfly from opening and that cause all the n20 and fuel to go in but not enough air, but i can imagine you'd be able to tell something like that was happening before you sprayed it...

how many miles are on the car, it is possible that your engine was getting weak and the extra power just sent it over the edge.
 
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