High EGT's

[steelydan]

My Burb get's high egt's 1100-1200 just by climbing the hill to my house with me on the throttle a bit. Egt probe is in drivers side exhaust manifold. Thought for the longest time the crossover may be the problem, but I swapped it out this past weekend for a mandrel bent one. The existing one was is good shape with no blockages.
I can get it to 1200f with 5-6 lbs boost without a trailer behind it and generally back off the go pedal when it climbs near 1100f.

What's next?

 

[nvmtnlion]

You are only getting 5-6 lbs boost going up a hill?? I had that problem and I called Bill Heath who told me to set for 13 or so PSI, and it really helped, I don't peg the EGT's anymore.

 

[Missy Good Wench]

Any performance mods (Chip) ???

1200 in the manifold is getting pretty toasty.

Be sure the air inlet is in good order and not obstructed in any way.

High EGT is caused by lots of fuel and not enough air or by High Intake air temps too.

With a 4 inch exhaust, flow should not be an issue.

My DaHooooley has the Banks 3-1/2 and the egt probe is in the down pipe.

Using turbo master and Heath chip. 900F on hard pull.

Now you may want to get the timing checked to see where it is.

Timing that is a tad retarded will cause the EGT to climb a bunch.

Advancing the timing a few degrees can really chop the top off the heat.

Just remember, a little can do a lot. More is not necessarily better.

1-3 degrees can make a huge difference.

Get that timing checked and see where its at. My bet is that its a tad slow.

Also, how many miles on the injectors since fresh.

Worn injectors can be spraying a poor pattern and cause excess heat.

If the burn is poor due to bad squirts the flame front does not consume the fuel well and a lot of unburned or still burning fuel gets blown out and can contribute to the heat.

If your squirts have 100K on them, they are on the skids for sure.

If need be, get the squirts rebuilt and set to pop at 2000 PSI (Ask the tech to keep them all even)

Check it out and let us know.


Missy

 

[Edzzed]

geez, for the life of me I can't imagine what hill in Mission you are referring to. none there are more than 30mph speed limit if I recall. If you don't have a t/m you should get one or make one. If you come through Surrey I can give you the pieces I used for the home made one I made. it's not pretty but it works and it's free. Ed

 

[Matt Bachand]

You are only getting 5-6 lbs boost going up a hill?? I had that problem and I called Bill Heath who told me to set for 13 or so PSI, and it really helped, I don't peg the EGT's anymore.

I think thats the problem too. My EGT's dropped a few hundred degrees by installing Turbo master.

I climb good hills doing 9-10 boost, and EGT's never see 800 since TM. Before TM 900-1000 was common. Then the exhaust iced the cake.. I rarely see 800 now. 9400lbs and as aerodynamic as a wall.

 

[DieselSlug]

I cruise up some pretty good hills at 45-50 mph with all mods except for a chip and i havent seen anything over 800....

 

[vegtech]

I had started a thread a month ago for the same thing but my truck was all stock. I did the warp speed cross over, 3" down pipe and 4" exhuast. and a home made TM and got rid of the intake snorkle. Stock i would hi 1000-1100 trying to keep 65 on flat ground with an empty car trailer now last week i had a caddy sedan deville on the trailer and held 65 up a good long hill and only saw 950 and what a power increas.

 

[Matt Bachand]

I had started a thread a month ago for the same thing but my truck was all stock. I did the warp speed cross over, 3" down pipe and 4" exhuast. and a home made TM and got rid of the intake snorkle. Stock i would hi 1000-1100 trying to keep 65 on flat ground with an empty car trailer now last week i had a caddy sedan deville on the trailer and held 65 up a good long hill and only saw 950 and what a power increas.

Yep breathing is good. Try running a 10 mile road race with a clothespin on your nose, and a straw out ouf your mouth and see how you feel

 

[steelydan]

Any performance mods (Chip) ???

1200 in the manifold is getting pretty toasty.

Be sure the air inlet is in good order and not obstructed in any way.

High EGT is caused by lots of fuel and not enough air or by High Intake air temps too.

With a 4 inch exhaust, flow should not be an issue.

My DaHooooley has the Banks 3-1/2 and the egt probe is in the down pipe.

Using turbo master and Heath chip. 900F on hard pull.

Now you may want to get the timing checked to see where it is.

Timing that is a tad retarded will cause the EGT to climb a bunch.

Advancing the timing a few degrees can really chop the top off the heat.

Just remember, a little can do a lot. More is not necessarily better.

1-3 degrees can make a huge difference.

Get that timing checked and see where its at. My bet is that its a tad slow.

Also, how many miles on the injectors since fresh.

Worn injectors can be spraying a poor pattern and cause excess heat.

If the burn is poor due to bad squirts the flame front does not consume the fuel well and a lot of unburned or still burning fuel gets blown out and can contribute to the heat.

If your squirts have 100K on them, they are on the skids for sure.

If need be, get the squirts rebuilt and set to pop at 2000 PSI (Ask the tech to keep them all even)

Check it out and let us know.


Missy

Been down in Albuquerque the last week:

Injectors have about 60,000km's on them
Pump has been changed 4 times by dealer before I bought it.
I have not had timing checked.
Has a new air filter no obstruction.

Hey ed, Stave Lake hill in Mission From 7th avenue up to the municipal hall.
Pretty good hill, similar to Royal Oak hill in Burnaby.

Over the Coquihalla with my empty car trailer I could only run about 45 mph as the egt's were so high. Truck had more power, just running high egt's.

 

[Edzzed]

I know Royal Oak and the coquihalla, I can hit 45mph at the top of the Coquihalla towing a fully loaded travel trailer in my avatar and my egt's are about 1100 but I also have water injection. without water injection I would not be able to climb that hill nearly as quick. I couldn't even begin to guess why your egt's are so high except your boost seems a tad low. more boost, to a point should cool your egt's. you are welcome to have the home made t/m parts I have. if that fixes it you can always go for a heaths fancy t/m or continue using the home made version. Ed

 

[Pillow]

You need more air flow.

I would recommend a turbo master along with a Heath towing chip or performance chip. Then set max boost 14-15 PSI per their instructions. Much better performance and lower EGTs.

Especially towing you will notice a big difference.

With the setup on my Burb, you need to give it MORE pedal on hills to keep it COOLER. When the boost goes up to about 10PSI it is an instant cooling effect. With the stock setup I could redline the EGTs anytime because it will de-boost given high IATs - bad combo. Boost keeps you cool, but you need more fuel to support it at the same time - I would not just do a turbo-master without extra fuel, IMO.

 

[steelydan]

Ok, I disconnected the vacuum line and removed the wastegate controller. I fabbed up a bracket and spring and set it for 12psi...seems to be better. I have to haul a 6000lb load down to Tacoma next week...will know for sure after that if it's any better. I run on the I-5 at 70mph alot and I always get a black stain behind the tailpipe. Maybe I was not getting enough air...

 

[vegtech]

i was running 12 for a bit but i get too much blow by at 12. I comes out the dipstick ant front and rear main seals. I toned it down to ten and still have good power and low egt's with minimal oil leakage

 

[Matt Bachand]

i was running 12 for a bit but i get too much blow by at 12. I comes out the dipstick ant front and rear main seals. I toned it down to ten and still have good power and low egt's with minimal oil leakage

When you are pushing 12 boost how can you see the blowby?

 

[vegtech]

like i said, oil come out the crank seals and the dipstick

 

[Pillow]

Sounds like it is time to examine that motor...