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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

New Best ET/MPH

  • Thread starter Thread starter Cobra912
  • Start date Start date Sep 4, 2010
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Cobra912

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#41
  • Sep 20, 2010
  • #41
I never planned on running a blower so I didn't bother when I put it together, and wanted to save some bucks. I was BEATING my car at the track quite a bit, you should be ok with a street driven set-up.
 

90lxcoupe

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#42
  • Sep 20, 2010
  • #42
ive broken the same part of that intake off when i had it, real PIA, you have to fight the urge to really overtighten those bolts
 

Cobra912

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Sep 20, 2010
#43
  • Sep 20, 2010
  • #43
yeah I was seriously hoping to avoid that, carefully tightening each one a little bit using a torque wrench everytime. Must have just had it off too many times, and I wonder if running a spacer helps with the breakage? I hope it can be repaired...
 

HotFox

15 Year Member
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Sep 20, 2010
#44
  • Sep 20, 2010
  • #44
I think there is something about the 5th pass...I bent a pushrod and pulled the 7/16 stud right out of the head on my 5th pass last year at the track.

You realize that if you had a carb or carb intake you would not have to worry about a upper intake. Just saying

Great times by the way! That chassis is really flexing in your last videos, I can’t imagine it getting any better with these time. Your running numbers that I am dreaming of running with my car, my goal is 10's with a NA 331 stick car.

Scott
 

90lxcoupe

20+ Year Stangneter
Oct 7, 2003
3,596
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Sep 20, 2010
#45
  • Sep 20, 2010
  • #45
Cobra912 said:
yeah I was seriously hoping to avoid that, carefully tightening each one a little bit using a torque wrench everytime. Must have just had it off too many times, and I wonder if running a spacer helps with the breakage? I hope it can be repaired...
Click to expand...

myne broke in one piece so it was easy enough to weld back in, but since it has to be tigged and its all wierd angles, it was like 100 bucks to have myne done, and that was with him resurfacing the mating surface. It sucks but thats life when you own a mustang. How are you tightening them? do you do the two center bolts then work your way out? If not, that could be part of the problem.
 

Cobra912

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#46
  • Sep 20, 2010
  • #46
90lxcoupe said:
myne broke in one piece so it was easy enough to weld back in, but since it has to be tigged and its all wierd angles, it was like 100 bucks to have myne done, and that was with him resurfacing the mating surface. It sucks but thats life when you own a mustang. How are you tightening them? do you do the two center bolts then work your way out? If not, that could be part of the problem.
Click to expand...

yep centers first, open wrench, then checked with torque wrench. Must have just had it off too many times I guess. Hope it doesn't cost too much.
 

Shaolin Crane

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Sep 21, 2010
#47
  • Sep 21, 2010
  • #47
Sounds like a reason to go Box R
 

90lxcoupe

20+ Year Stangneter
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Sep 21, 2010
#48
  • Sep 21, 2010
  • #48
Cobra912 said:
yep centers first, open wrench, then checked with torque wrench. Must have just had it off too many times I guess. Hope it doesn't cost too much.
Click to expand...

you should give edelbrock a call and see if they will do anything, it shouldnt have broke if you did that every time.
 

Cobra912

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Sep 22, 2010
#49
  • Sep 22, 2010
  • #49
90lxcoupe said:
you should give edelbrock a call and see if they will do anything, it shouldnt have broke if you did that every time.
Click to expand...

good idea so I did, but I was politely told I'm outta luck. So I'll have tyo find someone local to fix it.

Ripped my head off, surprisingly it all looks good, no visible damage, haven't had it checked for straighteness yet. Weird how the gasket blew, all the arp bolts were torqued. Just gasket failure under boost I guess.

 

Cobra912

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Sep 22, 2010
#50
  • Sep 22, 2010
  • #50
Shaolin Crane said:
Sounds like a reason to go Box R
Click to expand...

Not a bad idea. You think it would be too much of an intake though for my set-up in terms of power band 1500-6000?
 

Shaolin Crane

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#51
  • Sep 22, 2010
  • #51
Cobra912 said:
Not a bad idea. You think it would be too much of an intake though for my set-up in terms of power band 1500-6000?
Click to expand...

Not on a drag setup, might need a change of springs though. But since you already have the heads off...
 

HotFox

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Sep 22, 2010
#52
  • Sep 22, 2010
  • #52
No that gasket is blown from severe detonation. Could the possible root case be a cracked intake causing lean condition to this cylinder? How does a super charged cracked intake cause a lean condition? When fuel is fed to that cylinder by the injector in that port, at the same point the intake cracks causing boost to escape thru the crack causing reversion of the charge in that port that starts to carry fuel the other direction creating a lean condition. Just a thought.

Scott
 

Cobra912

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Sep 22, 2010
#53
  • Sep 22, 2010
  • #53
I could see that but everything looked secure when I unbolted the intake and it's just an ear, so I doubt that it caused a leak. It was probably from me lifting off the intake at a weird angle because the ear in question uses a stud not a bolt. There are no signs whatsoever of any type of head damage. Interesting point though.
 

Shaolin Crane

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#54
  • Sep 22, 2010
  • #54
Cobra912 said:
I could see that but everything looked secure when I unbolted the intake and it's just an ear, so I doubt that it caused a leak. It was probably from me lifting off the intake at a weird angle because the ear in question uses a stud not a bolt. There are no signs whatsoever of any type of head damage. Interesting point though.
Click to expand...

So whats the plan? MLS head gaskets, studs etc?
 

Cobra912

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Sep 22, 2010
#55
  • Sep 22, 2010
  • #55
good question, I'm not sure on the gaskets I'm gonna run or should run. Was thinking about running the same ones again, I was told by a reputable mustang shop that they run the same gasket on a lot of 9 second cars. ARP head studs for sure. Any opinions?
 

lancec2c30

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Sep 22, 2010
#56
  • Sep 22, 2010
  • #56
Don't plan on running a MLS gasket unless you have your block re-surfaced. They don't take well to a rough or uneven mating surface.
 

Shaolin Crane

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#57
  • Sep 22, 2010
  • #57
lancec2c30 said:
Don't plan on running a MLS gasket unless you have your block re-surfaced. They don't take well to a rough or uneven mating surface.
Click to expand...

How do you figure?
 

90lxcoupe

20+ Year Stangneter
Oct 7, 2003
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Sep 22, 2010
#58
  • Sep 22, 2010
  • #58
lancec2c30 said:
Don't plan on running a MLS gasket unless you have your block re-surfaced. They don't take well to a rough or uneven mating surface.
Click to expand...

this is true, MLS gaskets require a surface of 50 RA or better to seal right. I used them on my motor without resurfacing it, but that was only because i had other issues with the way my block was o-ringed and the MLS gaskets were my last shot before i went and pulled the motor and had it decked. Luckily the gaskets did the trick.

I think for you MLS gaskets would be a terrible idea, since you had a ton of passes on the car there is obviously some reason you blew the gasket, if you put the MLS gaskets on there and this happens again say 10 passes down the road its not going to be an easy fix, your gonna burn up a piston. You gotta thing of the head gasket like a fuse, I'd rather blow a gasket then burn up a piston.

What was the temperature difference when you dynoed the car and when you blew it up? The air can really mess with the air/fuel ratios and i remember reading about a few guys with lightnings who had thier trucks tuned in the summer, hammer on it for months with no problems, then in the fall when its 50 degrees at night time they hammer on it, it detonates and kicks a rod out of the motor

Also i dont think the cracked intake had anything to do with this problem, if anything it would have caused a vacuum leak
 

Shaolin Crane

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#59
  • Sep 22, 2010
  • #59
90lxcoupe said:
this is true, MLS gaskets require a surface of 50 RA or better to seal right. I used them on my motor without resurfacing it, but that was only because i had other issues with the way my block was o-ringed and the MLS gaskets were my last shot before i went and pulled the motor and had it decked. Luckily the gaskets did the trick.

I think for you MLS gaskets would be a terrible idea, since you had a ton of passes on the car there is obviously some reason you blew the gasket, if you put the MLS gaskets on there and this happens again say 10 passes down the road its not going to be an easy fix, your gonna burn up a piston. You gotta thing of the head gasket like a fuse, I'd rather blow a gasket then burn up a piston.

What was the temperature difference when you dynoed the car and when you blew it up? The air can really mess with the air/fuel ratios and i remember reading about a few guys with lightnings who had thier trucks tuned in the summer, hammer on it for months with no problems, then in the fall when its 50 degrees at night time they hammer on it, it detonates and kicks a rod out of the motor

Also i dont think the cracked intake had anything to do with this problem, if anything it would have caused a vacuum leak
Click to expand...

Hmm didnt know that. Dont see why they wouldnt seal though, i thought that was the purpose of a multi layer gasket
 

lancec2c30

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Sep 22, 2010
#60
  • Sep 22, 2010
  • #60
The purpose of a MLS gasket is to seal really well, but they require a much better prep in order to do so. Most machine shops want to know ahead of time if you plan to run a MLS gasket, because the "usual" finish they deck a set of heads with isn't good enough.
 
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