turbo question
Posting Guru
Joined: Sep 2002
Posts: 1,897
Likes: 0
From: Northeastern Pa - USA
dont know about the banks system but the ats is adjustable BUT the linkage is staked or crimped so it wont move. Requires the removal of the adjusting rod from the clevis and running a tap thru the theads to remove the stake or crimp.
the ats system is 3 full turns to make one more pound of boost. dont want to over do this either ... too much boost will lift the heads.
the ats system is 3 full turns to make one more pound of boost. dont want to over do this either ... too much boost will lift the heads.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
The wastegate lets exhaust gasses bypass the turbo after a predetermined amount of boost is produced. Shortening the wastegate rod raises the amount of boost the turbo will produce before the wastegate opens.
I will also recommend you be running both a boost gauge and a pyrometer before you do this.
More boost, more heat, more power = possible head gasket damage or piston damage without a way to monitor what is going on inside the engine.
Also the rod that goes into the wastegate actuator must not be allowed to turn or the diaphram will be torn.
I will also recommend you be running both a boost gauge and a pyrometer before you do this.
More boost, more heat, more power = possible head gasket damage or piston damage without a way to monitor what is going on inside the engine.
Also the rod that goes into the wastegate actuator must not be allowed to turn or the diaphram will be torn.
Fleet Mechanic
Joined: Sep 2005
Posts: 1,509
Likes: 3
From: Ladner, British Columbia
Without an intercooler I would say 10 to 12 psig maximum unless you want to start seriously reducing your engine life or risk engine damage.
With some of the engine mods that Dave mentioned above I guess you could push things to 20 psig.
Personally I have never gone more than 10 Psig on my stock 93 F250.
Seb....
With some of the engine mods that Dave mentioned above I guess you could push things to 20 psig.
Personally I have never gone more than 10 Psig on my stock 93 F250.
Seb....
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
The 6.9 has 7/16" head bolts. If it has the original head gaskets and over 100,000 miles I would stay under 10 PSI.
The 6.9 had 22.5 to 1 compression to start with, 10 PSI of boost gets it up to 37.8 to 1.
Stock boost on the 7.3 turbo was in the 7 or 8 PSI range, and it has much stronger 1/2" headbolts. The 7.3 had 21.5 to 1 compression and 8 PSI gave it 33.2 to 1 compression ratio.
If you want to run 20 PSI boost on a 6.9 you will need a lot more work than a boost gauge and pyrometer. New head gaskets and head studs would be the minimum to get close to 20 pounds boost reliably.
The 6.9 had 22.5 to 1 compression to start with, 10 PSI of boost gets it up to 37.8 to 1.
Stock boost on the 7.3 turbo was in the 7 or 8 PSI range, and it has much stronger 1/2" headbolts. The 7.3 had 21.5 to 1 compression and 8 PSI gave it 33.2 to 1 compression ratio.
If you want to run 20 PSI boost on a 6.9 you will need a lot more work than a boost gauge and pyrometer. New head gaskets and head studs would be the minimum to get close to 20 pounds boost reliably.
Last edited by Dave Sponaugle; Aug 28, 2006 at 10:54 PM.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Install a boost gauge and pyrometer.
Boost gauge line taps into the intake manifold piping.
The best place for the pyrometer thermocouple is the exhaust manifold.
That way you can see what you are running for boost and keep an eye on how hot the EGT's are, that can save you from melting the pistons.
New head gaskets and ARP headstuds will let you run 15 PSI without any worries.
Boost gauge line taps into the intake manifold piping.
The best place for the pyrometer thermocouple is the exhaust manifold.
That way you can see what you are running for boost and keep an eye on how hot the EGT's are, that can save you from melting the pistons.
New head gaskets and ARP headstuds will let you run 15 PSI without any worries.