Predator 100hp- EGT Problems
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From: Rural Central Ohio
Predator 100hp- EGT Problems
Well, got my Predator yesterday..and of course first tune I load up is the 100 hp. Tons of power and tons of smoke..! So much power you put it to the floor and the tires just go up in smoke. I was very impressed.
I like the power and all but you can't keep the pedal to the ground very long; the egts just skyrocket. I know I couldn't do the quarter mile safely. I definitely need a 4", but want a 5" turbo back system.
Will I be able to be on the throttle a lot longer with a 5"?? Will the egts be substantially lower with 5", how low????
I'm going to make a video clip comparing stock full throttle from stand still VS. Predator 100 hp full throttle standstill to show those without chips/tuners what these things really can do. So expect tons of smoke.
Thanks
I like the power and all but you can't keep the pedal to the ground very long; the egts just skyrocket. I know I couldn't do the quarter mile safely. I definitely need a 4", but want a 5" turbo back system.
Will I be able to be on the throttle a lot longer with a 5"?? Will the egts be substantially lower with 5", how low????
I'm going to make a video clip comparing stock full throttle from stand still VS. Predator 100 hp full throttle standstill to show those without chips/tuners what these things really can do. So expect tons of smoke.
Thanks
Elder User
Joined: May 2005
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From: Tennesee
No, until you get to an approx 500 RWHP a 5 inch won't do anything for you unless you just like the look and sound of it. The EGT drops will be the same as well. We stock all the MBRP 4 inch systems and we also have 5 inchers is if you want that just wanted to let you know it's not necessary unless you just like it etc. We also have some really nice 5 to 6 inch 304 SS polished tips and have the same in a 4 to 6 inch if you want a 4 inch system but need a huge tip to get the look you're after etc. Call us if you have any questions etc.
By the way a intake like an AFE Pro Gaurd 7 will also drop your egts a considerable amount and the PG7 still keeps the dirt out of your engine.
Mark @ DPPI
By the way a intake like an AFE Pro Gaurd 7 will also drop your egts a considerable amount and the PG7 still keeps the dirt out of your engine.
Mark @ DPPI
Post Fiend
Joined: Jul 2005
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From: 21791
sustained EGT's over 1200*F is toying with danger. the pistons begin to melt (aluminum) at 1228 degrees i believe. although the pistons them self are 100-200* cooler then the EGT's (because of oil-jetcooling and cool(er) intake charge) it is still asking for trouble in that range. i would always recommend to keep sustained EGT's below 1200* and maybe you can hit 1250-1300 for a second or two at most. Meth. Injection will also help cool the EGT's 200-250*, but it is fairly expensive to install and I hear its a hassle to keep filling the tanks. i would recommend a 6.0 intercooler, or maybe a Banks Technicooler kit to help lower temps. i myself wondered if a 6.0 Banks Technicooler would fit myself. a stock 6.0 fits, so why wouldnt a Technicooler for a 6.0 fit? (custom piping maybe). with meth injection and a technicooler plus a less restrictive intake, you could do the 1/4mile no problem with EGTs around 1150 i believe.
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From: China Grove, TX
i've seen a lot of folks recently reporting that the 100HP tune from the Predetor is running really high temps. i find it surpriseing that Diablo would tune it up this much running temps that high. 1300-1500*??? thats nuts if you ask me. what do the chips say to expect?? i've never heard that high from anyone else, though i could be wrong. just seems a little oodd to me....i'm not tryin to bash Diablo, i'm sure its a great product (most everyone is happy with it, Johnny8 loves it), just curious as to why its tuned up that much. again, i could be wrong in general...
Freshman User
Joined: Jul 2005
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Ive got a Diablo Preadator tuner manual and a tuner. Manual says pre turbo temps at 1300-1500, and post turbo temps over 1200 are to be expected.
No offense guys - but I cant imagine Magnaflow/Diablo engineers dont know WTF they are doing. Im not saying sustained 1300* temps is good at all, but odd, they d sell a product producing these temps without a HUGE disclaimer, and they put the expected temps IN WRITING.
Somebody grenades their rig whilst running these temps as described in the user manual says Magnaflow might be buying some replacement motors - or at least defending a products liability lawsuit or two.
No offense guys - but I cant imagine Magnaflow/Diablo engineers dont know WTF they are doing. Im not saying sustained 1300* temps is good at all, but odd, they d sell a product producing these temps without a HUGE disclaimer, and they put the expected temps IN WRITING.
Somebody grenades their rig whilst running these temps as described in the user manual says Magnaflow might be buying some replacement motors - or at least defending a products liability lawsuit or two.
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Originally Posted by edub32
I know I couldn't do the quarter mile safely. I definitely need a 4", but want a 5" turbo back system.
Still, something you should know... I don't know of any 5" turbo back systems. Everyone I have seen has a 4" DP, then expands to 5" just past the tranny. A 5" won't fit between the engine and firewall - hell, a 4" barely fits - and won't fit an OBS. If you want a bigger DP than that you will have to lift the body or modify the firewall.
I have a 5". I didn't do it for better performance, because I'm not pulling that much power. I just like the way it looks. Since my truck is so plain in so many ways, I thought I'd do one thing extravagant!
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New User
Joined: Nov 2004
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From: Salt Lake City, Utah
I believe you're also asking for tranny trouble with the 100hp setting...I seem to remember reading somewhere on the forum that a setting above the 60hp is not recommended with the stock transmission. Reliability and longevity...out the door...
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Elder User
Joined: Sep 2004
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From: Helotes, Texas
I'm gotta chime in here. Mark is right about the 4" exhaust. 5" is not going to do you much good without big mods. You really need to change dp and exhaust to run high hp settings, no other way to keep it safe. Diablo is telling you what to expect, but they are not telling you that it is OK to run those EGT's. You will be much happier (as will your truck) with a good exhaust. I preach to everyone to do the supporting mods before the HP mods. It saves you money in the long run. I'm sure Mark can get you a good price on one... Just my 2 cents.
Max
Max
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From: Rural Central Ohio
Yeah I definitely will get exhaust before I try it out again. Right now, I'm just playing around with the different settings. Does the stock muffler catch a lot of the black smoke?? Mine shoots quite a bit of smoke, but I've seen a lot more.
Postmaster
Joined: Nov 2004
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From: New Hampshire
Originally Posted by edub32
Yeah I definitely will get exhaust before I try it out again. Right now, I'm just playing around with the different settings. Does the stock muffler catch a lot of the black smoke?? Mine shoots quite a bit of smoke, but I've seen a lot more.
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From: The Great Plains
Originally Posted by SoCalDieselFan
Somebody grenades their rig whilst running these temps as described in the user manual says Magnaflow might be buying some replacement motors - or at least defending a products liability lawsuit or two.
Senior User
Joined: Jan 2005
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From: Monterey Park, California
I already got used to my 100 hp setting long ago. You need more air to burn that extra fuel which the 100hp predator puts out and creates all the black smoke. The engine is just a pump after all. You got to work on both ends to get it to pump more efficiently. Bigger exhaust, bigger intake, bigger turbo. After all this you'll wonder where the egts and smoke went. Then if you want more smoke and power, then get bigger injectors, stronger HPFP, custom chip tuning. What stops me from going this extra step are my powder metal rods that can vent my block. My trans is still fine, but from my past experience you can loose the 2nd to 3rd shift without warning if you do a lot of WOT runs from a standing start and going thru the gears at the rev limit. I'm all ready with 4.5 big ones to get my trans built with 6.0 billet convertor in case this happens.
Last edited by Hello; Jul 26, 2005 at 11:58 PM.