Engine/Transmission (1994 - 1998) EGT's!!!!!!!!!!!! Ahhhhhhhhhhh!!!!

[Cummins360]

Ok here goes, as you can see in my signature I got a decent amount of modifications on my truck, however on my 99' 24 Valve POS which is about to be sold I could get up to about 120mph with out even seeing the EGT's get anywhere near 1300, it had rv injectors, edge comp, and a burried fuel pedal . Now however on my properly valved truck i can barley get to 60 before i hit 1200, now given my transmission has a POS converter in it and the 99' was a 5 speed but what can I do to cool it off???? Are the 370 delivery valves too big??? The injectors too big???? That SP66 shure pumps enough air so wtf?????? Also am I going to distroy my engine by holding 1200 for like 30 seconds at a time (racing imports and the like) ????????????

Sorry for the long post but I'm upset and worried lol.

-Travis

 

[FordCummins]

Where is your timing at? Also, Ive never heard of 370 DVs, you probably mean 191s.

 

[Vaughn MacKenzie]

What are you maxing out at? Does the turbo spool pretty quick or does a lot of heat build quick before boost comes on and you're behind the 8-ball from there on up?



370s are going to run hot for the simple fact they don't have optimal spray angle and pattern. . . since they're cheap you're basically getting what you pay for. Another thing while a 12-valve generally operates at lower EGTs it's likely to run higher EGTs than a comparable-HP 24-valve when the power is turned up, for the simple fact of better-flowing head.



I think you can dial it in and lower EGTs though. Make sure you don't have any boost leaks. What level of boost are you running at?



Running 1200f for 30 seconds is fine, not going to hurt it there. You could get away with a little more than that (say 1300f) for short bursts, but then if you're doing that on a daily basis then that will probably take a toll over time with shortened engine life or potentially popping something.



Vaughn

 

[bgilbert]

Cummins says you can run all day long at 1250*f preturbo. Short bursts up to 1500* is ok, to me that is. That sloppy auto is killing you, the 5sp would allow the temps to drop during each shift. How fast is the boost building and how much boost are you seeing?

 

[Cummins360]

Well the turbo is limited at like 44 PSI, what kind of injectors have about the same power and an optimal spray angle????? And how can I dial it in??? Enable the AFC? Move the cam plate? Change Injectors? help!

-Travis

 

[Forrest Nearing]

definately enable the AFC! bring that fuel in a little slower

 

[vssman]

Advancing the timing really helped lower my EGTs.

 

[bgilbert]

How fast is the boost building and how much boost are you seeing?

Travis do you have a boost gauge?

 

[Matthug]

With boost at 44 PSI from a SP66 you should not have EGT issues unless your timing slipped or is less than 13*. I'd set it to atleast 15*, don't go more than 16 if you're running the stock head gasket and bolts. But timing to 15. 5 usually drops EGT's around 100-200 degrees over stock timing of about 12. 5.

 

[Alphacowboy]

hey, if you 24v is a POS, can I have it for 100 bucks? :-laf



I am with the guys above, it has a few things to do with the 12v head, it will not flow like your 24v did, and the auto, like stated above, will not back off the throttle like you would with a manual for short bursts. As stated as well, check your timing.

 

[Cummins360]

Ho I advanced the timing to about 16 degrees but I will be checking it again, when I fixed the KDP I just adjusted the timing with the cover off as the gear was right there, I cleaned the taper on the shaft and the gear its self with brake clean and dried everything bone dry before torqueing the nut so I dont really see how it could have slipped, there is deffinatly plenty of air from that turbo but I will check all the boots and stuff and enable the AFC as much as I dont want to, But I gotta do something about these damn egt's. Oh and Yes I have a 30 psi boost gauge (alot of good that is doing lol)

-Travis

 

[Cummins360]

????????????? Anyone?????????????

 

[vssman]

Definately recheck the timing. Mine slipped and I had to reset it about 1 month after I had it advanced.

 

[jtwcummins]

Out of the box stock my EGTs would get to 1200-1250 fast when accel hard or pulling a hill. On the Grapevine the temp would sit at 1200 for the entire run, about 30 mins. This isn't excessive per Cummins. I could never get to go higher than 1250. Drove stock w/gauges four yrs then started making mods. Can't see why you should worry about those temps. You can dial back fuel alittle if timing still set okay.

 

[Matthug]

1200 is pretty hot for stock though, I never towed but I couldn't get my EGT's past 900 stock pre-turbo even. How much boost was it running? Maybe the wastegate was weak and you were running a little lower boost, should be atleast 18 PSI stock. Also was your exhaust stock? Maybe the cat was plugged up and making things hot. I will agree 1200 sustained is no problem at all, cummins says 1250 sustained with temps up to 1400 for no more than 20 seconds. I've had mine to 1600, but only for about 10 seconds.

 

[raychem]

where is the pyro at... post or pre turbo? Don't forget that you are running a lager turbo which needs to see rpm to start moving some air so higher egts are a side effect at lower rpms as aresult. I personally used to run an hx-40 for daily driving and made 500 at the wheels with awsome drivability. As for injectors, I like to run DD stage 4 which are a much cleaner running injector and it will give you a few more ponies over the 370( about 40 to be conservitive) and give you better control over egt since they are a more aggressive(as in control of injection and angle) injector .