First off let me start with saying I've learned a lot from the DTR.

Here goes, I try to make wise performance upgrades with advise from friends and stories/posts I've read from other people's experiences on the DTR. You can read what I have in my sig bombwise.

With what I'm running; am I suppose to see 1800+ degrees with Smarty on #5 and TST #7? I used to have a 1500 degree pyro, but I was pegging that, so I got an 1800 degree thinking I should know just how much I'm above 1500. I replaced the gauge tonight and was shocked to see the gauge peg on a short (1/8 mile) wide open run.

Am I crazy for thinking I shouldn't see these temps?

Let me know what you think? If this is correct I'll shut up and buy a water/meth kit. If this is not correct I'll need some advice as to what to check.

Thanks,

Mike

 

Mike:

Hey buddy, I had a feeling that truck of yours was getting a "little hot" after you said that gauge was "pegging" the needle on that 1500 gauge!
FWIW,.... I would make darn sure your pyrometer probe is working properly first. I have seen WAY TOO MANY of those go bad and give "false" readings including one on my truck! The only way to do that is to order another probe like you have now and install it. As you know, for "comparison" purposes my 2002 never gets much above 1500 degrees even on hard WOT runs or while drag racing. I believe you have more fuel than I do,............. ......and that MAY account for the higher temps, but if you are seeing 1800 degrees and the pyro/pyro gauge are not faulty, then you may need to look at some water injection. As you also know, that was the reason I had to put water injection on my 1996!

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John_P

 

I have a feeling if your pegging a 1800* guage your going to need more than water/meth, or a lot of water/meth to cool those temps.

 

Hey buddy, That's what I can't figure out. You're truck might have a slightly smaller injector, but you're running the comp. version of the TST and have a HX40 turbo. You're @ 100 mph before 1500, while I'm 1800 at like 60-65.

I would be well over 2000 degrees at the 1/4...

I was told by people in the business I would see about 1450-1500 degree with the turbo I'm running.

I'll change the pyro prob to make sure. I need to get this figured out before the NC event or no racing for me.

 

I'd say watch out!! My 3rd gen rarely sees 1500 (at the track only) Pinned throughout the 1/4 mile!

You'd better find the problem before racing!!

Rick

 

Rick, Do you run a 1500 degree gauge?

 

Pegging an 1800* pyro! I can't even do that without water/meth.

 

Mike:

Yes, I know what you are saying on the speeds and EGT's! Change that pyro probe out ASAP MIke and I would also check that gauge. I think I have an extra gauge you can try if you want.

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John_P

 

what kind of boost numbers are you seeing at that temp? and how is the filter?

either your probe is had or you must have a boost leak/plugged filter. are the freeway cruise temps 6-900? if so your probe is prolly pretty close and if it is you might want to find the problem before you buy a #6

 

Something is mechanically wrong. The timing solenoid on the VP44 would cause this as well as low dyno numbers.

Boost leaks?

Don~

 

I can get 40 lbs of boost. On the highway I usually see 600-900 temps. I order a new pyro prob. The gauge is brand new.

I bet Don is right, Scheid said the same thing when my truck wouldn't run on their injectors.

 

Wow... I thought 1350 was meltdown. Was the turbo glowing like a lightbulb?

...never ceases to amaze me.

 

Mike D--

I was at first thinking maybe the air filter is restrictive.

Then I realized that even sucking air through a coffee stirrer your EGTs would probably not get that hot. A restrictive air filter just can't add hundreds of degrees. Heck, even the stock airbox on your truck wouldn't jack up EGT that high.


I'm thinking something mechanical.

What are your EGTs with the TST off?


For reference--with Smarty on 5 and M4s, I can accelerate up to hwy speeds at a pretty decent rate and never crack 800°.

Justin

 

Justin, On the way to work this morning I had the TST on level one, smarty #5. Getting up to highway speeds I'll see around 1000-1100. On my usual blast off spot on the highway, I hit 1500 at around 85 or so mph with the TST off.

 

1800 degrees suggests the timing is not fully advancing. Its as typical problem with the VP44 when theya re getting tired. The newer pumps use a better material pressed into the pump housing to help avoid the trouble. This would not have anything to do with the starting or idle though.

Low Dyno numbers also indicate a pump problem. Either pressure loss through wear, timing solenoid or a combo of both.

Luckily nothing money wont fix.

Don~