Engine/Transmission (1994 - 1998) EGT's WAY too high! I Need to move the plate back

[CMartin]

Well, I slid my #10 plate all the way forward and I moved my EGT probe into the manifold PRE turbo. I can not believe how high my temp goes. If I stand on it in 4th form a rolling 50mph, the EGT guage pegs at 1600° :--)



I will be moving the plate back to the middle until I can figure out what to do about the temps. I put my 16cm² housing on..... the lag is horrible and it does not seem to have helped much for the EGTemp. I wish I would have left my 12cm² wastegated housing on at this point.

I have not put the 370 marine injectors in yet, and I was thinking this would make the temp even higher (more fuel = more heat right??)? My stack will go on tomorrow, but I was going to keep my stock down pipe and exhaust (less muffler and cat) up to the bed and into the 5" single stack. How much will the temp drop if I go to 4" down pipe and exhaust up to the stack? Also, I have not messed with the star wheel adjuster in the top of the AFC housing, will adjust this lean or rich have any affect on the exhaust temp?



What else can I do to let it breath better and keep that temp down to the safe 1300°F maximum?

Here are the mods I have but remember, injectors are not installed yet and exhaust is still stock minus cat and muffler.



TST #10 plate full forward (I will put it in the middle if I have to for lower temps)

TST AFC spring (medium)

K&N FIPK air filter assembly

16cm² turbo exhaust housing (non wastegate)

370 marine injectors

Griffin intercooler (large!)



I also plan on putting in the 3K gsk governor springs in a couple of weeks.

 

[Joseph Donnelly]

The 16 housing should help egts 150-200 deg if your exhaust is otherwise low restriction (cat flows well, and muffler is straight through). Even then, you can't move the 10 very far forward and control egts. It is really time for more turbo. If lag bothers you, the Diesel Dynamics Jammer is quick spooling and should help egts considerably. I wish it had been available when I developed the 10 for TST; it would have been a better balanced hopup from the air vs. fuel standpoint.

 

[Reddog1]

I question that you have an EGT problem. I too thought I had an EGT problem. I was worried for three years. I bought a used EGT gage, compared it to my original EGT gage. At WOT, there was between 400 to 500 degrees difference.



I bought a new gage. It read the same as the used one. Conclusion, my first gage out of the box was defective. A $150 EGT gage saved me about $1200 I was about to spend on a turbo.



I have #10 plate, 3K gov springs, 16 degree timing, 370 injectors, BHAF and EGT probe before turbo. My '96 is auto with DTT transmission. Fully loaded, 9600 lbs, start at bottom of the hill at Scott Road at 65 MPH, can do 75 to 80 MPH at top. Max EGT is 1300 degrees, on old and new gage. Both are hooked up.



I commute from Placerville to San Quentin each week, and could give you a test drive. My bet is you need a new gage.



I almost forgot, I have stock pipe with missing cat and muffler.





Wayne

phone 503 626 0813

 

[CMartin]

My guage is brand new?? Autometer silver series. I could not imagine it being defective right out of the box... not that I am saying yours was not but that would suck! So how do I know if mine is bad? I don't want to buy another guage just to see if mine is bad! Do you happen to have a spare laying around

By the way, I have a feeling that the size of my truck may have something to do with higher temps... . look at my updated signature and you will see what I mean.

 

[Joseph Donnelly]

CMartin's pump is very different from Reddog's automatic pump. Where the 180 hp pump wouldn't give high egt with a #10, the 215 hp pump certainly can because it delivers a lot more fuel.

 

[Forrest Nearing]

ditch the K&N, and put a BHAF on it...

 

[bmoeller]

ditch the K&N, and put a BHAF on it...

The Swampers and 9" lift aren't helping you any, either.

 

[Howard Durand]

CMartin said he would move his plate back to center to reduce the egt problem. Are there other adjustments that would help his problem?

What effect does the governor arm adjustment have on the #10 plate.



Mine is adjusted to touch the lower nose of the plate just high enough to make sure it doesn't go under the nose.

In making this adjustment, I had to lower the arm considerably from where it was set for the #5 plate.

When towing 7000# in 3rd with the TC locked on a 6% grade, it stops fueling at about 60 mph and 2200 rpm with probably a fourth of the throttle travel left.

The beauty of this is that egt does not exceed 1200 degrees but I would like to get a little more fueling on the top end.



Is the governor arm stopping at the upper end of the curve on the #10 plate?

Would it be better to move the plate forward some more or to adjust the governor arm?

The plate is currently set about 0. 030" forward from stock.

 

[K5IP]

Joe,

Hope you like your new Abq location. I am just north of you in Los Alamos.

You say you helped developed the TST#10. I have tried a TST#6 but am not happy with the smoke at this altitude. Also, the plate is agressive enough to sliip the clutch and yeild high egt's.

Just wondering about trading it for a less agressive plate and if so, what would you suggest? I don't want a lot of power, just a little help would be fine.

Thanks

Roger

 

[Forrest Nearing]

slide that plate back some...



Forrest

 

[TrqMonster]

high egt's

My egt's went down about 100 to 150* when I got my stack installed (Stock exhaust size to the stack, 4" pipe may lower even more) and previously I just had a straight pipe. The 39's dont help anything. I think your gauge is right, a #10 all the way will run your truck that hot.

 

[CMartin]

Well, I moved my plate back a smidge and installed my single 5" stack today..... temps down to 1250-1300 at WOT. Thanks for all the help!!

 

[Reddog1]

CMartin, I have been out of town. I am glad to see you solved your problem. A bad gage out of the box? That's what I said. Several people including Piers and Joe gave me many suggestions on potential problems. I have a lot of respect these guys knowledge. but, I did in fact have a bad gage out of the box.



On weight, I tip the scales 9600 lbs. This is with my camper, and it has not been off for about six months. I can hit 1300 degrees, but not easily. I guess my next excuse to go to a bigger turbo will have to be to lower the smoke.



Anyway, I am glad you found your problem.





Wayne

 

[Joseph Donnelly]

The 8 is less strong than the 6. If the smoke is at full power, the plate makes a difference. If on take off or partial power, the afc spring and star wheel make more difference.

 

[K5IP]

Joe,

Do you know of a way I can compair profiles of a TST#6 vs an TST#10?

Rog