EGT's with your 1HD-T

[Greg_B]

Dunno if you will have huge problems running it a 1bar Martin. There is another Maarten at http://www.all-american.nl who used to have hopped up replacement turbo's for the European 1HD-T market. Well though of from what I gather. He might have an answer to the question how much the stock turbo will take: maarten@all-american.nl

hth's

gb

 

[Adam B]

Well...I threw in my home made manual boost controller and went on a week-long trip to the interior with all my gear and 11' boat on top of the truck. If it wasn't a brick to begin with, the boat sure makes it one.

I had upped the boost to ~14psi with the MBC and I notice that it's repeatable to about +/- 0.5psi, so my boost maxes at 13.5 - 14.5 psi. That's almost 1 bar (14.7psi). That was on the first attempt at tuning the MBC...basically I dialed in the spring preload screw until it felt like it was starting to load, then I tightened the jamb nut and tested it. 14ish was my goal so I never touched it again.

I do feel that the extra 3psi makes a difference in terms of power. I was over-fueled to begin with so I think I'm now using more of that excess fuel.

It's really hard to tell what the effect on EGTs has been because I can still hit 1300F easily on the big hills. I'm still driving by watching the gauge all the time and working my right foot to keep it below 1300. Unfortunately, on the steepest long hills it means that I'm still dropping down to 70km/h even though I have lots of available power. I'm going to turn down the fuel a bit tonight and when I go up the Coq again this weekend I'll see how things feel.

 

[jcolvin]

hello!
i just finshed installing my pyro pre turbo last weekend and test run it on highway. i set the exhaust temp guage to 720C and set the turbo 0.9 bar when i reach the setting it automactically buzzer and light. my question is when i am running 100kms steady the temp drops around 350C to 400C and when i accelerate the temp rises faster than my RPM and when i reached the 700C and steady my foot the temp goes back to 400C. is that normal? there was a time during the run i push the engine hard and i reached 790C @ 1bar.
as you can see on the dyno sheet the blue line represent stock. after tuning red line there was significant increase in power.
at the same speed of 28mph the stock produced 48hp while after tuning 99hp.

stock: 116hp @ 0.71 bar

tuned: 147hp @ 0.82 bar

Can you tell us what you adjusted when tuning? Just turned up the fuel? Anything else?

 

[Dougal]

I believe only adding the cooler will have no increase in the power output. You'll need (at least) to increase diesel at the pump in order to notice a diference.

You will get a slight power increase due to the cooler air making the engine more efficient.
Some may notice it, some may not.

The "Diesel Engine Reference Book" shows an intercooler capable of taking out 60% of the heat can add 6% to the power and economy.

It's one of the few upgrades with no downside.

 

[Martin White]

I just got my truck back after installation of a 3" mandrell exhaust system. EGT's appear lower when under load in every circumstance by approx. 100 degrees F and in spite of having the fuel turned up again.

 

[bram]

You will get a slight power increase due to the cooler air making the engine more efficient.
Some may notice it, some may not.

The "Diesel Engine Reference Book" shows an intercooler capable of taking out 60% of the heat can add 6% to the power and economy.

It's one of the few upgrades with no downside.

is this the "Diesel Engine Reference Book" you are referring to?

http://www.amazon.com/Diesel-Engine-Reference-Bernard-Challen/dp/0750621761

is it worth the $$$?

 

[jaydub83]

1991 HDJ81
stock
cruising 2100rpm 90km/h 650F
going up hill i can hit 1100F at 60km/h.. i think it was 6-8% grade
i average about 400-700F at cruising speeds from 60-100km/h

 

[sandcruiser]

1993 hd-t motor.
5speed.
Pyro installed before turbo
cruising around town, temps are from 400 to about 700* F.
Up hills it'll climb up around 1,000.
Haven't seen higher than 1,100 yet but I live in a fairly flat area.
max boost is around 11 or 12

I do live on a steeeeep driveway and frequently hit 450 or 500 as I come home. It usually takes a good 30 seconds to drop down to 400 again... and takes forever to drop to 300 (like a full two minutes)

 

[nate dogg]

I believe only adding the cooler will have no increase in the power output. You'll need (at least) to increase diesel at the pump in order to notice a diference.

I know this is somewhat different as is was a 87 jetta 1.6TD, but the difference between stock and intercooled was HUGE! The car was boosting 8.5 psi, stock fuel settings, only 440,000kms of wear. Mileage went from 850kms/50L to minimum 950 and as much as 1100 kms/50L. 5th gear 125km/h up the snowshed hill on the coqihalla. There will be many that disagree, but I feel anything TD without an intercooler is not fully utilized.

 

[sandcruiser]

Great.... here I was all excited that I finally had a turbo, because a diesel without a turbo is "only half a diesel". Now I've gotta start planning an IC because ...

... I feel anything TD without an intercooler is not fully utilized.

I've gotta stop reading these threads or I'm never getting the truck done!

 

[Tapage]

I've gotta stop reading these threads or I'm never getting the truck done!

Stop reading the hole forum .. mud it's a totaly bad influence ..

 

[nate dogg]

Great.... here I was all excited that I finally had a turbo, because a diesel without a turbo is "only half a diesel". Now I've gotta start planning an IC because ...




I've gotta stop reading these threads or I'm never getting the truck done!

no worries, i'm driving a Bj60 that isn't intercooled. The fun never ends with old cruisers

 

[Dougal]

is this the "Diesel Engine Reference Book" you are referring to?

Amazon.com: Diesel Engine Reference Book: Bernard Challen,Rodica Baranescu: Books

is it worth the $$$?

Yes that's the one. Yes it's worth the $$ But I think it's cheaper from SAE. SAE published my copy.

 

[sandcruiser]

did a long, flat drive yesterday (about an hour, not that long!) and in 5th at 80 kph the EGTs stayed between 600 and 750. Just another data point.

 

[charliebukol]

i have a 1995 1hdt with a 47mm turbo, and a 3 inch exhaust ,and a modified fuel system, modified aneroid ,and today when i was at 3000rpm in drive i saw my egt at 1700f boost was at .8 bar around 11 psi.
my probe is after the turbo, i was running at around
200kph
so now i have to send it back to the tunner , to add fuel
i would like to installal meth /water injection and set it at 9psi would this be a good idea

 

[Dougal]

i have a 1995 1hdt with a 47mm turbo, and a 3 inch exhaust ,and a modified fuel system, modified aneroid ,and today when i was at 3000rpm in drive i saw my egt at 1700f boost was at .8 bar around 11 psi.
my probe is after the turbo, i was running at around
200kph
so now i have to send it back to the tunner , to add fuel
i would like to installal meth /water injection and set it at 9psi would this be a good idea

How are you geared high enough for 3000rpm at 200km/h?

1700F will kill your engine, I'm surprised it hasn't melted into a lump already. More fuel will make this worse, find another tuner. You need more boost and a probe pre-turbo.

 

[crushers]

sounds to me like a sacrifical engine ...
go for it, more fuel and more and more...
let us know when the engine finally goes "fawk you, i quit"

 

[gbentink]

i have a 1995 1hdt with a 47mm turbo, and a 3 inch exhaust ,and a modified fuel system, modified aneroid ,and today when i was at 3000rpm in drive i saw my egt at 1700f boost was at .8 bar around 11 psi.
my probe is after the turbo, i was running at around
200kph
so now i have to send it back to the tunner , to add fuel
i would like to installal meth /water injection and set it at 9psi would this be a good idea

EDIT: It's almost as if the poster has made up the info posted, either that or he needs some basic education on diesels. You really think he is going to do 1700F post turbo, then to remedy, add fuel and reduce boost????



Your engine will die, and probably almost dead already given the time it takes to get to 200 - sustained high EGT's

These are an expensive engine to play around with as a teenager.

Your boost needs to go up up up and you need an intercooler. With the modded comp wheel you should be good for 20psi.

But I think the advice comes too late, sorry

 

[bsmith123]

CHT Gauge

Curious on opinions on the value of cylinder head temp gauges in addition to the EGT

 

[Dougal]

Curious on opinions on the value of cylinder head temp gauges in addition to the EGT

I think it'll be too slow to react. EGT will tell you everything you need to know already.