Hey guys,
Maybe i'm just a bit "slow", but it seems to me that the more air you get in the chamber, the lower the EGT's. Is this thought correct? What all are the major factors in EGT's?
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1996 Ford F250 powerstroke diesel
Running 285/75 Bridgestone dueler revos
Gauges: boost, pyro, tranny.
15.6K ICP
140V IDM mod... easy as pie
6637, 3" downpipe to 3.5" turndown right after t-case. EGT's wont go over 1100, boost to 25 psi, sounds awesome!
I think i have AB code injectors!
theoretically, the more air you can pack into the cylinder and the least amount of restriction on the exhaust side, the lower the EGT's.
EGT's are a product of combustion. the less efficient combustion and exhaust flow, the higher the EGT's. the more air you pack into the cylinders, the more fuel you can pack into the cylinders. at a point, i believe lower than 14:1 air:fuel, the air cannot support the full combustion of all of that fuel. at this point you start seeing smoke and you're EGT's rise.
Ok, kinda what i thought...
isnt 14.7:1 for gasoline? im betting that diesel is different.
__________________
1996 Ford F250 powerstroke diesel
Running 285/75 Bridgestone dueler revos
Gauges: boost, pyro, tranny.
15.6K ICP
140V IDM mod... easy as pie
6637, 3" downpipe to 3.5" turndown right after t-case. EGT's wont go over 1100, boost to 25 psi, sounds awesome!
I think i have AB code injectors!
A simple test I have done that proves the 'more air, lower EGT' theory is pulling a load up a hill and watching the EGTs in OD. As the EGTs get to 1200, turn off the OD - the RPMs go up (moving more air) and the EGTs come down. Fun and easy! Too bad I can almost see the fuel gauge move when I rev it over 2500...
__________________
1997 Powerstoke 7.3L Turbo Diesel 4X4
3" to 4" downpipe, 4" stainless exhaust, superchips programmer, boost, pyro, & trans temp gauges, 6637 filter, 203* thermostat
Yes, it does sound good!
TRUCK IS PARKED DUE TO DIESEL PRICES. CURRENT TRANSPORTATION IS A 600CC MOTORCYCLE
isnt 14.7:1 for gasoline? im betting that diesel is different.
very well could be. that number just jumped into my head. i think i remember reading somewhere they idle at something like 50:1, normally run around 20:1 and start smoking at 14:1. then again, could be having a brain fart, it is the end of finals week! ill see what i can dig up.
So, my thought is if you cram way more air in than fuel, you shouldnt ever have EGT problems, right????
__________________
1996 Ford F250 powerstroke diesel
Running 285/75 Bridgestone dueler revos
Gauges: boost, pyro, tranny.
15.6K ICP
140V IDM mod... easy as pie
6637, 3" downpipe to 3.5" turndown right after t-case. EGT's wont go over 1100, boost to 25 psi, sounds awesome!
I think i have AB code injectors!
Yep, your EGT's will be at room temp. It will stop running. Either it will starve for fuel or blow the heads right off the block.
maybe not quite that much air...
__________________
1996 Ford F250 powerstroke diesel
Running 285/75 Bridgestone dueler revos
Gauges: boost, pyro, tranny.
15.6K ICP
140V IDM mod... easy as pie
6637, 3" downpipe to 3.5" turndown right after t-case. EGT's wont go over 1100, boost to 25 psi, sounds awesome!
I think i have AB code injectors!
A simple test I have done that proves the 'more air, lower EGT' theory is pulling a load up a hill and watching the EGTs in OD. As the EGTs get to 1200, turn off the OD - the RPMs go up (moving more air) and the EGTs come down. Fun and easy! Too bad I can almost see the fuel gauge move when I rev it over 2500...
Only partly true. Your changing the gear ratio as well. Making it easier to pull the load. Lock a block and tackle of sorts. It would be similar to pulling a load with walmart bag mod in place, then removing the bag while in motion, allowing the air to easily penetrate. You can NOT compare shifting as a more air factor.
__________________
96 F350 CC Dually PSD. Tuner, straight pipe, 6637 filter, ribbed diff cover, 12.7k mod, 28k tranny cooler, 3 plate TC, autometer boost, trans, and pyro. Used 4 Car Haulers, 5th wheels, goosenecks, Fat Chicks.
01 F250 CC 4x4 PSD. SOLD.....Kinda missed already, and its Day 1.
Only partly true. Your changing the gear ratio as well. Making it easier to pull the load. Lock a block and tackle of sorts. It would be similar to pulling a load with walmart bag mod in place, then removing the bag while in motion, allowing the air to easily penetrate. You can NOT compare shifting as a more air factor.
I see your point. The same theory is proven by driving at 2k RPM (up a grade, with a load, in drive) and then watching the temp rise, then mashing the gas and lowering the EGTs.
My original example was indeed terrible.
But more importantly what is the WALMART BAG MOD?
__________________
1997 Powerstoke 7.3L Turbo Diesel 4X4
3" to 4" downpipe, 4" stainless exhaust, superchips programmer, boost, pyro, & trans temp gauges, 6637 filter, 203* thermostat
Yes, it does sound good!
TRUCK IS PARKED DUE TO DIESEL PRICES. CURRENT TRANSPORTATION IS A 600CC MOTORCYCLE
that's where you put a plastic wallyworld bag over your intake...
Makes lots-o-smoke...
Jim (or anyone else)
What if you had an amazing turbo setup (50 psi boost with stock injectors(just go with it i know how hard that would be))
and HEAD STUDS...
What do you think the EGT's would be full boost full fuel???
__________________
1996 Ford F250 powerstroke diesel
Running 285/75 Bridgestone dueler revos
Gauges: boost, pyro, tranny.
15.6K ICP
140V IDM mod... easy as pie
6637, 3" downpipe to 3.5" turndown right after t-case. EGT's wont go over 1100, boost to 25 psi, sounds awesome!
I think i have AB code injectors!
