PRE or POST

[CLAYTON]

How high could you take it on a short burst?

 

[JWillms]

PRE for ME



After reading all the post on this I went pre just becuse Im peranoied(SP?) about my truck and I want to know whats going on right now. Ill add one post latter on and have a switch for them on the same guage just to see what the diffrence is and I think it would be cool to have a switch for a guage.

Justin<><

 

[TCDiesel]

I have install post look at the placement it is within 1. 5" of the elbow. YES I have had one go thru the turbo NOT on my ISB. I have tested this position it is -40 to -50 at idle ,-140 to- 165 @ 2100 RPM with 25 LBS, boost pulling 20. 000 on Flat road, @ 68 MPH, @ 77* ambient temp

 

[2broke2smoke]

i've done about 10

all pre ...

 

[TCDiesel]

Originally posted by TWest

I have install post look at the placement it is within . 05" of the elbow. YES I have had one go thru the turbo NOT on my ISB. I have tested this position it is -40 to 50 at idle ,-140 to 165 @ 2100 RPM with 25 LBS, boost pulling 20. 000 on Flat road, @ 68 MPH, @ 77* ambient temp

 

[TCDiesel]

E/T

ONE MORE.

 

[Mad Bomber]

Originally posted by RankRam

Pre and the reason for me is accuracy .

What he said

 

[TCDiesel]

I hope this pic work"s

 

[Steve M]

Post turbo. I run my trucks stock power so shut down is my main concern. The turbo retains alot of heat. Even after pre turbo has cooled to safe shutdown temp the turbo might still be too hot.



Pics in readers rigs to the left...

 

[JHardwick]

I'm wondering here, everybody is concerned about shut down temps like this from SteveM ... .....



Post turbo. I run my trucks stock power so shut down is my main concern. The turbo retains alot of heat. Even after pre turbo has cooled to safe shutdown temp the turbo might still be too hot.



So, I'm gathering that as long as the EGT is in an acceptable range, it's safe to shut down ..... is that correct?



I may be off the wall here, been known to happen.



But, if you were in a coast or engine break sitution when you came to a stop, the EGT numbers pre/post would be acceptable for shut down ... ... ... ... ... what about running some fresh cool oil through those bearings? I've not once heard anybody mention this and when I'm sitting for a cool down, that's what I'm envisioning.



Oh, well, I'm pre turbo as well.

 

[Mad Bomber]

Size??

Your injector size matters some people (including myself)have bigger than stock.

 

[Mad Bomber]

Originally posted by CLAYTON

How high could you take it on a short burst?

On a dyno I've had it pegged but for less than 10 seconds. The differance is that the temps come down fast. The peak temps are not like towing a 5ver up a 7% grade for 10 miles

 

[Scrappy]

my gauge is pre turbo

but my turbo temp monitor is post.

 

[JHardwick]

jvanwaardhuizen just lost me here, lol

 

[Forrest Nearing]

he's saying he uses post for cooling down

 

[JHardwick]

my gauge is pre turbo

Originally posted by jvanwaardhuizen

but my turbo temp monitor is post.

I'm still lost :-laf

 

[TCDiesel]

E/T

A pre temp sensor would be used more for Engine/cylinder/Exhaust temp,A post Sensor would be used to monitor the turbo,the turbo can retain more heat at idle,If you work your motor hard at night with a warm ambient temp,Pull over and check your exhaust side of the turbo at times it will glow red.

 

[Forrest Nearing]

Originally posted by JHardwick





I'm still lost :-laf

he's got a pyro pre-turbo to monitor the engine while driving... and he's got a turbo monitor post-turbo probably for one of those cool down timers.



Forrest

 

[Bertram65]

Response time on mine, post, is pretty fast, I can go from 400 degrees to 750 degrees climbing a hill within 5-8 seconds. it also goes down just as fast as the boost goes down. There is no difference is accuracy of what it is measuring depending on placement. My truck is stock and will probably stay that way so for me post provides the information I am looking for.

 

[Forrest Nearing]

if it were pre-turbo, it wouldn't go down as fast as boost...



post turbo is fine for a bone stock truck for watching temps for shut-down, but if you've got any mods or do any heavy towing, post just tells you when damage has already occured!



Forrest