AlpineRAM

Just installed my ISSPRO pyro pre turbo.
I'm getting some funny readings. With the engine cold ( around freezing) and ignition on the needle rests on the pin. When I start the engine in N or P the temp goes up to 450F within 2-3 seconds and stays there. Cruising on the freeway at 75mph I read 10-12 psi boost and 850-900F.
Since I'm having stock injectors in for the moment, ScottyII and a DPP4" exhaust I think these values are a bit high. (As far as I read the idle temps should be at about 250F or lower)
When I put the truck in D temps go up to 600F (DTT 89% TC)

Any ideas how to verify my pyro?

TIA

AlpineRAM

Shovelhead

I see idle temps around 300*
Highway cruise around 60 mph= 600* empty.
Stock auto tranny & edge comp(no wire).
Your temps do seem high.

Don M

Since your in Austria...you need a metric Pyro that reads in Centigrade

Something is fishy, IMO. I have seen idle temps that were about 400, but not with stock injectors.

My pyro generally sits on the 100 degree mark before I start up. Of course it is not freezing most days.

Don~

WHIFF

What RPM does your truck idle at? Your EGTs sound high, but the more fuel you squirt, the higher the EGTs. It doesn't take long for mine to go up when I step on the pedal, but mine idles around 250* if I haven't gotten on the pedal too hard, and I see around 600* EGT on unloaded cruising around 65MPH (I guess that's somewhere over 90KPH!)
Where exactly did you mount your thermocouple? It sounds like the wires might be touching. Did you shorten or lengthen the wires at all? If you did, you'll have incorrect readings.
Hope this helps.

hellotbone

Mine sits around 300-400 idle. Cruise at 70 MPH Im around 600*

Diesel Dave

The tip of the thermocouple could be in contact with the bottom of your manifold if you have it screwed in too far. I would check to make sure that the tip is located about half way between the bottom and top of the manifold.

Steve5.9L

I'm seeing 250-300F at Idle after start up. 400F-600F puttin' around the neighbourhood. 600F-800F at High way speeds. WOT up a large hill 1000F-1100F at 19.5psi boost. These are all with no load.

Steve

AlpineRAM

[quote author=WHIFF link=board=7;threadid=22798;start=0#msg213503 date=1069692194]
What RPM does your truck idle at? Your EGTs sound high, but the more fuel you squirt, the higher the EGTs. It doesn't take long for mine to go up when I step on the pedal, but mine idles around 250* if I haven't gotten on the pedal too hard, and I see around 600* EGT on unloaded cruising around 65MPH (I guess that's somewhere over 90KPH!)
Where exactly did you mount your thermocouple? It sounds like the wires might be touching. Did you shorten or lengthen the wires at all? If you did, you'll have incorrect readings.
Hope this helps.
[/quote]
I looked into the contacts- no touching to be seen anywhere, no kinks or the like in the harness. The probe isn't bottomed out, checked this at install. My idle is around 650 rpm.
Don: Would have liked to have a metric pyro- with metric fittings ;D - The 100F mark is the lower pin on my pyro.
Could it be that since the stock injectors are old that they cause the high readings? Under boost the EGTs stay quite in check- couldn't run WOT long enough, it's just a tad slippery.. But with the stockers and running 34psi boost the EGTs don't climb above 1000 under 2600 rpm and then creep up to 1100 at higher rpm- couldn't watch this too closely since there wasn't too much road left ;D

AlpineRAM

Don M

The stocker injectors make 34 PSI...what type of box are you running? Thats alot of boost for stock injectors.

If the turbine housing you have is small it could run high. A good thing for low speed particle/soot emissions and aftertreatment systems (catalyst)

Something is fishy.

Don~

AlpineRAM

i'm running the edge pulse and some nice turbo. The fun thing is that EGTs stay very well in check under boost. The turbo is capable of flowing some amounts of air since boost doesn't fall off above 2600, it starts falling at about 3000. Spoolup is also quite nice- 5psi @ 2000 in N (steady rpm)

I hope to be able to find another pyrometer and will heat both probes to 1100F to compare.

This fishy smell you mentioned doesn't fit the region ;D

AlpineRAM

rattle_rattle

[quote author=Jamie link=board=7;threadid=22798;start=0#msg213507 date=1069692734]
Mine sits around 300-400 idle. Cruise at 70 MPH Im around 600*
[/quote]
Same for me.

KATOOM

That does sound high. Did you get the EV model? If so you have the black ampilifier box. That could be bad. I'd call Isspro and tell them. Maybe you got the wrong length wires for the box. They have to match eachother. Good luck.

FMF MX

Alpineram -

I don't know, but something you may want to check into is the blending of the diesel fuel in Austria. It may well contain some additive that burns hotter & cleaner for emission purposes. That would make it show higher temps.

BoldtsWagon

My post turbo is 250 in neutral and 350 in drive with DTT 89%. My altitude is 300 ft above sea level. Higher altitudes will increase temps by 50-75 degrees. My idle speed is 950 in neutral.

Alpine, make sure you do not have the defroster on, it operates the air conditioner and increases exhaust gas temps.

AlpineRAM

Thanks for the hints- I do now know definitely that there is something wrong. Today the pyro waved at me from 100F to 700F during the wait to start light. (Engine not running)
I'll look into the contacts again.
KATOOM: Yes I have the EV model, but my amplifier box is green. I don't think you can go wrong with the wire length with the EV since the box has the wire attached and therefore comes with a fixed length.
BoldtsWagon: Thanks for the info, the defroster was off (full leg warmer), I think your readings will differ from mine since we have the probe mounted in different locations and you have a 12V
WHIFF: Sorry for the typo about the idle- it's around 850 rpm- not 650.
FMF MX: I think that higher cetane diesel should lead to lower EGT, and also since over here nitrous oxide emissions are a concern the additives should make it burn cooler if any. Any idea whether you want to come over here for a while?

Thanks folks, keep the good info coming

AlpineRAM