How much boost will pop a head gasket? - Ford Truck Enthusiasts Forums



Australia Chapter Join Chapter , Leader: ChunderDownUnder

How much boost will pop a head gasket?

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 01-14-2013, 04:43 AM
SSSimon SSSimon is offline
Posting Guru
Thread Starter
 
Join Date: Apr 2010
Location: Canberra Australia
Posts: 1,159
SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.
How much boost will pop a head gasket?

Lots of the common mods on my engine, but stock HPOP and injectors.

Pulling up Clyde Mtn yesterday I was getting over 29 psi of boost from the stock turbo with stock compressor wheel.

Next mod is going to the new Gen 2 WW which could increase the boost to as high as 43 psi.

Should I be worried about blowing a head gasket at that boost level?

I sort of thought I'd be safe with the stock HPOP & sticks...
Reply With Quote
  #2  
Old 01-14-2013, 05:21 AM
ChunderDownUnder's Avatar
ChunderDownUnder ChunderDownUnder is offline
Posting Guru
 
Join Date: Apr 2009
Location: Man Cave
Posts: 2,119
ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.
Boost is boost, whether you have big sticks or not. What I would be more concerned about is back pressure until you get ya wheel. The main advantage of the wheel is back pressure is kept in check on the stock turbo. In regards to HG's or studs - when you up or above 40psi.
Reply With Quote
  #3  
Old 01-15-2013, 04:26 AM
SSSimon SSSimon is offline
Posting Guru
Thread Starter
 
Join Date: Apr 2010
Location: Canberra Australia
Posts: 1,159
SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.
I know my turbo is getting 'surge' at high (for stock) boost - I can hear the fluttering/pulsating noise - it sounds a bit like a cheap ricer blow-off valve - but continuous pulsing.

The G2 WW should solve that problem - the explanation I saw was that the surge is a cavitation issue on the inlet side wheel rather than back pressure affecting the exhaust side of the turbo.

Anyway, the shiny new G2WW arrived today. Out of respect for Diesel Site no pics or comments until I've run it past them.
Reply With Quote
  #4  
Old 01-16-2013, 12:38 AM
ChunderDownUnder's Avatar
ChunderDownUnder ChunderDownUnder is offline
Posting Guru
 
Join Date: Apr 2009
Location: Man Cave
Posts: 2,119
ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.ChunderDownUnder has a great reputation on FTE.
You are right in relation to the surge. But you should realise that BP will cause more damage to your engine, than surge in relation to your turbo. Pushin 30psi out of a stock blower will give you BP. The cool thing about that wheel is you can get 40psi out of it with out increasing turbine speed and the all important BP is kept well in check for that kind of PSI.
SOOOO for little expense you get ya surge sorted, you can achieve 40psi out of a GTP38 and you win on BP.
Reply With Quote
  #5  
Old 01-16-2013, 03:22 AM
SSSimon SSSimon is offline
Posting Guru
Thread Starter
 
Join Date: Apr 2010
Location: Canberra Australia
Posts: 1,159
SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.SSSimon has a great reputation on FTE.
OK, is there any tell tale signs that I should be watching out for regarding engine-threatening levels of BP?

I was sort of figuring that I had any BP issues avoided with the 4" TB exhaust I now have and the fact that I will never be pushing anything like 500+ HP out of my set up (hence to qualification of stock HPOP & injectors).

But I would prefer NOT to learn about it the HARD WAY THIS TIME !

40 psi out of a stock blower for a $200 WW upgrade is a lot cheaper that a GTP38 - but not if the result is a BP issue leading to an engine failure !

I have been thinking of the BP as the pressure in the exhast AFTER the tubo. But the engine damaging BP would be pressure in the headers and up-pipes BEFORE the turbo. I can see if this pressure got too great the exhaust gases wouldn't get out of the cylinders quick enough and pressure would build inside the engine and blow a head gasket or worse.

Given the inlet and exhaust turbines are running at the same speed, is the exhast BP BEFORE the turbo roughly the same as the boost pressure?

If the Gen2 WW will achieve 43 psi then maybe I NEED to be getting the HD headstuds now!
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
6.0 hpop problem??? Youngblood94 6.0L Power Stroke Diesel 57 01-28-2017 11:53 AM
Abrupt turbo response??? Brown Falcon 6.0L Power Stroke Diesel 19 09-02-2016 10:45 PM
Repair/Refurb/Mod project plans- input? (Keep me from being stupid) ExPACamper 1999 - 2003 7.3L Power Stroke Diesel 92 11-05-2015 10:23 AM
Thoughts on dissconecting the boost actuator line (red hose) Meydawg51 1999 - 2003 7.3L Power Stroke Diesel 27 04-06-2015 03:41 PM
max boost on head studs alone 1973dieselhighboy Competition 7 02-06-2015 12:17 PM


Go Back   Ford Truck Enthusiasts Forums > >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 05:35 PM.