• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Crankcase Pressure

  • Thread starter Thread starter nothwoods
  • Start date Start date May 11, 2014
Prev
  • 1
  • 2
First Prev 2 of 2

nothwoods

Member
Jun 10, 2013
85
4
9
May 14, 2014
#21
  • May 14, 2014
  • #21
Here's another pic, can't figure out how this happened. Like I said, no damage to the cylinder!
 

Attachments

  • IMG_20140514_100857_113[1].webp
    1.2 MB · Views: 159

FoxMustangLvr

I love my Pimp
SN Certified Technician
Oct 14, 2012
4,968
3,514
204
Spokane, Wa
May 14, 2014
#22
  • May 14, 2014
  • #22
Wow, looks like you got lucky with only minimal to no damage. Why are you going back to N/A? Less problems? Or are you just over being boosted?
 

nothwoods

Member
Jun 10, 2013
85
4
9
May 14, 2014
#23
  • May 14, 2014
  • #23
This car is way too much of an animal for the street, and I don't have much interest in bringing it to the track anymore. I figure if I put a good N/A setup it will put around 325hp to the wheels, be way more reliable and streetable, and I'd drive it and have fun with it a lot more.
 

FoxMustangLvr

I love my Pimp
SN Certified Technician
Oct 14, 2012
4,968
3,514
204
Spokane, Wa
May 14, 2014
#24
  • May 14, 2014
  • #24
What heads do you have? With a 333 cid 325 rwhp should be cake to obtain and still fun to drive.
 

modulistic

Active Member
Nov 26, 2002
383
30
29
May 14, 2014
#25
  • May 14, 2014
  • #25
wow, that ran?
 

nothwoods

Member
Jun 10, 2013
85
4
9
May 14, 2014
#26
  • May 14, 2014
  • #26
Actually ran great, only symptom driving it was smoking under heavy throttle. I could drive it around normal all day without a problem. I have AFR 185 heads, but I'm thinking by the time I do a valve job, plane them, and change valve springs it may not cost much more to just buy new heads.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
May 14, 2014
#27
  • May 14, 2014
  • #27
one thing you can do is install a vacuum pump to eliminate pressure in the crankcase. a lot of guys use the engine driven vacuum pump from a navistar diesel engine. the nice thing is that you eliminate the blow by for the most part and you gain power at the same time.
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
May 22, 2014
#28
  • May 22, 2014
  • #28
July 2014 MM&FF has an article on boosting a 351. Part of the refreshening of the motor included increasing ring gap wider for boost. We all know about piston damage from going lean, but they listed another cause. The increased heat from boost causes the rings to swell, hit the ends, and eventually grab the cylinder wall, damaging the ring lands. I bet this motor had the rings gapped for NA conditions and they were too tight.
 
Prev
  • 1
  • 2
First Prev 2 of 2
You must log in or register to reply here.

Similar threads

Engine Catch Can or not?
  • R82148V
  • Mar 4, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
431
Fox 5.0 Mustang Tech Mar 6, 2026
ctandc
C
A
Engine 302 oil leak when running
  • AlexM556
  • Sep 8, 2026
  • Classic Mustang Specific Tech
Replies
18
Views
643
Classic Mustang Specific Tech Oct 4, 2026
manicmechanic007
Engine Looking for suggestions and or ideas
  • PonyGTrider
  • Aug 25, 2026
  • Fox 5.0 Mustang Tech
Replies
17
Views
507
Fox 5.0 Mustang Tech Sep 7, 2026
PonyGTrider
N
Engine 86 GT no start/stall
  • nweber
  • Jul 28, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
226
Fox 5.0 Mustang Tech Jul 29, 2026
AeroCoupe
B
Engine Strange Noise
  • burntokita
  • May 8, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
486
Fox 5.0 Mustang Tech May 11, 2026
keel
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?