Choosing solution to compressor surge?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by jhand124
This is from an earlier post.
Senior User
Joined: Nov 2006
Posts: 179
Likes: 0
From: TN
Kwik, just noticed that you have a 550, that is why your egts are high. Get some 3:73 or 4:11 gears in it and temps will be much better. You can throw 20,000$ at that thing and nothing will bring the temps down, I have struggled with this before. I can do some nice mods to a F250 that will make 500hp and egts's not get over 1200 deg and then take those same mods and put them on a 550 and it will peg the gauge. You have no idea how many hours I have spent on a 550 trying to figure out why they get so hot, only thing I can come up with is gearing.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by beansdiesel
Kwik, just noticed that you have a 550, that is why your egts are high. Get some 3:73 or 4:11 gears in it and temps will be much better. You can throw 20,000$ at that thing and nothing will bring the temps down, I have struggled with this before. I can do some nice mods to a F250 that will make 500hp and egts's not get over 1200 deg and then take those same mods and put them on a 550 and it will peg the gauge. You have no idea how many hours I have spent on a 550 trying to figure out why they get so hot, only thing I can come up with is gearing.
I have two issues stemming from the engine spinning too fast at highway speed: EGT's too high.
Serpentine belt slipping with AC on in the summertime straight and level not towing anything. Horrid shrieking from the crankshaft pulley slipping the belt at 75 mph 2700 rpm.
Time to do some research on axle ratios again and then talk to the wife.
Thank you for this reply, rep points given, this has been very helpful.
Thread Starter
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Posting Guru
Joined: Oct 2007
Posts: 2,225
Likes: 1
From: Farmington, Minnesota
Stock sucks
Originally Posted by ron's power stoke
i think the pcm is confused by that chip...you will know after you try stock..the early 99 turbo was always good about not surging..thats why the other guy's use the wicked wheel..the wicked wheel is a stock early 99 wheel
Up a larger grade truck defuels at 1150 EGT and 14# in 4th at 60 MPH?
Up same long grade as above I experienced a little surge up grade as tranny shifted into 4th @ 19#. Then on same hill where I had constant surge above in overdrive, I had no surge in stock @ 22#, 1000 EGT, 4th gear, at 60MPH, WOT.
So I'm experiencing lots of surge with added power with not much of an effect on EGT's, so what do you think; surge=overfueling, and can this be corrected by new exhaust housing, or do I give DP tuner a call?
that was kind of long winded, sorry
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
id give jody a call...explane to him whats going on...the early 99 have differnt PCM and ICM then the 99.5 and up trucks do..the on the shelf chips that are out there are mostly for the 99.5 and up trucks cause they are all about the same..my truck did not like a chip.i have the XLE computer code.i was the second one jody made a chip for with this computer code and its awesome..not many of them PCM's out there so a chip is not made for it..jody custom tunes to your PCM so it is alot better and he can do a lot more...
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
If you look on the DP-Tuner web site, you will note that the tunes reduce in HP setting as the desired tow weight increases. So I would guess you are at least partially correct.
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
pull your PC and get the codes off of the bar code sticker.jody will want it any ways.....this movie may help..let me know what your code is...
http://www.dieselmovies.com/view_vid...163467c9dae521
http://www.dieselmovies.com/view_vid...163467c9dae521
