post egt's 1050-1100??
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Fleet Mechanic
Joined: Nov 2004
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From: Templeton, Massachussetts
post egt's 1050-1100??
i have read here many times that alot of guys say not to run post turbo, mine is from banks and w/ the higher ambient temps lately 90-95 i am seeing much higher on the pyro.
so i called them again and they say that 1050-1100* is max temp post turbo. but alot of you fellows are telling me 900*
he said there is no reason to move it to the manifold on the OBS because i cannot controll it... just let off the pedal.
they seem very knowledgeable of there products and my truck.
he also said that if i run all their stuff it will never get too hot. i assume he means under normal use and all their products. this way they are all test together. seems logical.
i understand that if i bought other tuners i could get more power... but i wanted safe power.
i think like this did you ever wonder how hot your car or other previous vehicle got. or the trans??? no because you were not aware!!!!! but the gauges tell the tale then we wonder and sometimes even worry.
so what is really safe. and the meaow box is coming out soon too!!
so i called them again and they say that 1050-1100* is max temp post turbo. but alot of you fellows are telling me 900*
he said there is no reason to move it to the manifold on the OBS because i cannot controll it... just let off the pedal.
they seem very knowledgeable of there products and my truck.
he also said that if i run all their stuff it will never get too hot. i assume he means under normal use and all their products. this way they are all test together. seems logical.
i understand that if i bought other tuners i could get more power... but i wanted safe power.
i think like this did you ever wonder how hot your car or other previous vehicle got. or the trans??? no because you were not aware!!!!! but the gauges tell the tale then we wonder and sometimes even worry.
so what is really safe. and the meaow box is coming out soon too!!
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From: New Hampshire
i'm sorry man, but when i get to 1100 PRE-TURBO i start to back off... i'm sure i'm being a little over conservative but i would NEVER run that high post turbo... again i'm no know it all.... and i could be way off here... but my pre-turbo guage redlines at 1300... that's why i start to back off at 1100... i just don't see how running that post turbo can be "safe"...
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Fleet Mechanic
Joined: Nov 2004
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From: Templeton, Massachussetts
Originally Posted by johnny8
i'm sorry man, but when i get to 1100 PRE-TURBO i start to back off... i'm sure i'm being a little over conservative but i would NEVER run that high post turbo... again i'm no know it all.... and i could be way off here... but my pre-turbo guage redlines at 1300... that's why i start to back off at 1100... i just don't see how running that post turbo can be "safe"...
Postmaster
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From: New Hampshire
Originally Posted by 18vtx00
they say 1300* pre is max and there is 250-300* difference, but they say it is okay. not that aluminum does starts to melt @ 1600* or anything!!!!!!!!!!
Posting Guru
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From: Morgantown WV
I see 1400 pre quite often, but not for a long period of time. The pyro is only seeing exhaust temps. The cylinder is also getting a cooler charge of intake air. The real problem is the turbo.
Postmaster
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From: New Hampshire
Originally Posted by mech2161
I see 1400 pre quite often, but not for a long period of time. The pyro is only seeing exhaust temps. The cylinder is also getting a cooler charge of intake air. The real problem is the turbo.
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Fleet Mechanic
Joined: Nov 2004
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From: Templeton, Massachussetts
Originally Posted by johnny8
ok... let's do the math... they say 1300 pre is max... that agrees with the redline on my guage... now lets take worst case difference that they say = 300.. now.. they say 1100 post is max... but... 1100 post + 300 difference = 1400..! that's 100 overmax...! so what "they" are saying doesn't add up and numbers don't lie... one other thing... i have seen posts on here where guys say there can be even more of a difference than 300..! sorry man... i just don't agree with what "they" are saying... call me stupid... call me a wimp... but i get to pay for a new motor if i melt something or break something... "they" are definately not going to pay for it..!
i never seen over 900* so far! but just like to be safe is all.
i gettin rid of the kitten and i want a complete 4 or maybe step the tail up to 5".
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Fleet Mechanic
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From: Templeton, Massachussetts
Originally Posted by johnny8
i agree... very short runs of these temps probably won't hurt... but... my goal is to get my truck upgraded to the point where i can run a moderate tune on my programer for longer lengths of time without getting much over 1100 or so... let's say i can run a 60hp tune on the predator up a long moderate grade while towing 10k... but the intake and exhaust upgrades allow my mule to do this without getting into the redzone for egts... for me it's all about towing with power and safety for the motor and tranny...
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Postmaster
Joined: Nov 2004
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From: New Hampshire
Originally Posted by 18vtx00
i hear ya!! that is why i am posting, but he seems confident that i will never get it to that point!! lets call it the melting point!!!
i never seen over 900* so far! but just like to be safe is all.
i gettin rid of the kitten and i want a complete 4 or maybe step the tail up to 5".
i never seen over 900* so far! but just like to be safe is all.
i gettin rid of the kitten and i want a complete 4 or maybe step the tail up to 5".
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Fleet Mechanic
Joined: Nov 2004
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From: Templeton, Massachussetts
Originally Posted by johnny8
this is the max that most guys on here say you should see post turbo... 900 + 300 = 1200 max safe temp to run for moderately long time... with a little safety factor left... don't shoot me... i'm just the messenger... just repeating what i've heard..... i think i'm going with the 4" ss - turbo back... with a nice chrome downpipe behind the wheel... that's the plan anyway... we'll see how the wallet's doing in a few months...!
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Fleet Mechanic
Joined: Nov 2004
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From: Templeton, Massachussetts
Originally Posted by johnny8
sounds like a plan..!
http://shop.airflowonline.com/Merchant2/merchant.mv
well if i do it myself. for a kit i am not sure.
i was looking @ airflo cuz i got 3 buddies that want me to put stacks on their rigs. like i do not have any projects of my own.
Posting Guru
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From: South Texas Coast
Originally Posted by 18vtx00
they say 1300* pre is max and there is 250-300* difference, but they say it is okay. not that aluminum does starts to melt @ 1600* or anything!!!!!!!!!!
http://www.chemicalelements.com/elements/al.html
Do not EVER excede 1200 degrees PRE-TURBO temp for any appreciable length of time, unless you are independantly wealthy.
It has been documented that Pre-turbo temps can be as much as 400 degrees higher than Post-turbo temp. 1100 + 400 = 1500 = dead PSD
Last edited by Phydeaux88; Jun 14, 2005 at 10:30 PM.
Postmaster
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From: New Hampshire
Originally Posted by Phydeaux88
Guys one simple absolute fact, check any book on the properties of elements, Aluminum melts at 1220 degrees farenheit. The pistons in your PSD are made of aluminum.
Do not EVER excede 1200 degrees PRE-TURBO temp for any appreciable length of time, unless you are independantly wealthy.
It has been documented that Pre-turbo temps can be as much as 400 degrees higher than Post-turbo temp. 1100 + 400 = 1500 = dead PSD
Do not EVER excede 1200 degrees PRE-TURBO temp for any appreciable length of time, unless you are independantly wealthy.
It has been documented that Pre-turbo temps can be as much as 400 degrees higher than Post-turbo temp. 1100 + 400 = 1500 = dead PSD
Logistics Pro
Joined: Jul 2002
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From: South Dakota
I have yet too see any thing over 500F post when flyinging down the road at 80mph when running my Diablo at the 100Hp program.
Even flooring it for long extended periods, I only see a max of 800F.
I think that some are equating exhaust temps with combustion temps, which is not accurate.
I'd definately not run anything over 1050 post turbo, and I've marked my pyro redline at 900F for a margin of safety.
I really have to laugh when I see posts that say post turbo pyros are meaningless, especially since OTR trucks used to run them post for many years until the probes became reliable enough to withstand pre-turbo temps, and not take out the turbo.
On the other hand, I'd rather have mine pre-turbo, but due to my own over-engineering, it ended up on my DP.
Even flooring it for long extended periods, I only see a max of 800F.
I think that some are equating exhaust temps with combustion temps, which is not accurate.
I'd definately not run anything over 1050 post turbo, and I've marked my pyro redline at 900F for a margin of safety.
I really have to laugh when I see posts that say post turbo pyros are meaningless, especially since OTR trucks used to run them post for many years until the probes became reliable enough to withstand pre-turbo temps, and not take out the turbo.
On the other hand, I'd rather have mine pre-turbo, but due to my own over-engineering, it ended up on my DP.
Last edited by superrangerman2002; Jun 15, 2005 at 09:47 AM.