Egt questions

[Fordfan90]

i have a 1990 7.3 idi n/a and I'm wondering what you guys are getting for egts. I'm trying to figure out what I should be running. I get up to 700 pulling a steep grade in 4 gear not on it real hard either. Driving around town I'm seeing 400 to 700 not driving hard. Does that seem kinda high? Thanks for the info.

 

[sjwelds]

Where is your EGT probe? Is it in the exhaust manifold?

1100 degrees is thought of as a safe limit.

 

[Fordfan90]

Where is your EGT probe? Is it in the exhaust manifold?

1100 degrees is thought of as a safe limit.

Yes in the driver side exhaust manifold as far back as I could get.

 

[hesutton]

Nah, Not high. NA IDI's will make some higher EGT's. My 6.9 ran significantly higher average EGT's NA than it does now with a Bull Moose, injectors, and turbo.

Heath

 

[chris142]

Sounds like you can turn the fuel up some.

 

[austin92]

My truck is NA and even empty will break 1100. It won't black out the sun but it does let out a nice little haze if I'm really gettin it


Sent from my iPhone using Tapatalk

 

[Hydro-idi]

Agreed. Sounds a little low actually

 

[Fordfan90]

Thanks guys I thought that was to high for it. Does anyone know what kind of exhaust to run on an N/A like how big would you guys go on one?

 

[chris142]

I had the restrictive "y" removed and a single 3inch with a flowmaster built.

 

[austin92]

When I was looking at exhaust everything I read recommended at least dual 2.5" or single 3.5". I went single 4". Didn't notice power gains but it dropped my egts 50-100 degrees. Sounds good too. Seen a lot of guys modding obs powerstroke kits but I ordered all my parts off eBay and had a local shop weld and hang it


Sent from my iPhone using Tapatalk

 

[Macrobb]

Higher EGTs(for the same power output) in a IDI tend to mean retarded(or advanced, but usually retarded) timing overall.

Obviously, a richer burn(more fuel compared to air input) will result in higher temps, so you can actually make more power at lower temps with a turbo and less /relative/ fuel input.

Also, on my(banks turboed) '88, I'd never see beyond 800F, unless I was towing or hauling. A big hill might start it climbing, but the hill was usually over before it hit the 900F mark.

Cruising on the highway? I averaged 500-600 depending on conditions.

 

[Fordfan90]

Higher EGTs(for the same power output) in a IDI tend to mean retarded(or advanced, but usually retarded) timing overall.

Obviously, a richer burn(more fuel compared to air input) will result in higher temps, so you can actually make more power at lower temps with a turbo and less /relative/ fuel input.

Also, on my(banks turboed) '88, I'd never see beyond 800F, unless I was towing or hauling. A big hill might start it climbing, but the hill was usually over before it hit the 900F mark.

Cruising on the highway? I averaged 500-600 depending on conditions.

So retarded timing is where it wants to be? My truck sounds like it's way to advanced but I can't get the advanced sound to go away it's quieter but doesn't sounds like I think it should.

 

[Thewespaul]

Do you have a timing meter? The general consensus is 8-9*

 

[Fordfan90]

Do you have a timing meter? The general consensus is 8-9*

No I asked my snap on dealer about one it was super high price I might buy it though.

 

[Thewespaul]

What did he quote you? I bought these to time my truck:

https://www.amazon.com/gp/product/B000EVYGV4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
http://www.tooldiscounter.com/ItemDisplay.cfm?lookup=FERV765-01