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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 09-15-2015, 04:23 AM   #1 (permalink)
tugboat94
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diamond eye exhaust & large cross over pipe

Ok so i bought a 3" down pipe to a 4" all the way back mufflered exhaust kit. I got it off ebay from diamond eye performance exhaust i also got a large cross over pipe should have in the mail wed om the truck sat. Are any of you guys running this type of set up if so how do you like it?

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Old 09-15-2015, 06:56 AM   #2 (permalink)
540fan
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Pls do a search and you will get a bunch of info on DE. I have one and like it.

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1980 IHC Scout Turbo Diesel powered by a factory Nissan SD33T motor, 80k original mile. SOLD.
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Old 09-15-2015, 10:49 AM   #3 (permalink)
OkDually
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Quote:
Originally Posted by tugboat94 View Post
Ok so i bought a 3" down pipe to a 4" all the way back mufflered exhaust kit. I got it off ebay from diamond eye performance exhaust i also got a large cross over pipe should have in the mail wed om the truck sat. Are any of you guys running this type of set up if so how do you like it?
There are quite a few members here on the forums that have the DE Exhaust and New crossover pipe.

Your Engine will be able to exhale better and will help in overall performance.

Just read up on DE in the forums and be sure to install some gauges.
At minimum Exhaust, Fuel, Boost to monitor the essentials....
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Old 09-16-2015, 10:47 AM   #4 (permalink)
57diesel
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Unless they changed it the DE crossover can be a pain to install because the diameter is so large at the flange end there is not clearance for little things like washers, flange nuts, or even the wall thickens of a standard socket.

Again unless they changed it you don't get any hardware for the flange end or the 'donut' gaskets so be sure to get that stuff before you start. I used band clamps on my whole system because they allow you to easily adjust things if needed. I had to re position the cross over a couple times to get it to seal and access the nuts so it was very handy there.

DE also apparently had some issues with the down pipe not quite being bent correctly. It was a big issue for Burbs because of the rear heater lines happen to run right where the pipe ends and it ended up so close that it would touch them. Pickups seemed to be less of an issue. Others reported the problem to them and apparently got replacement pipes so if yours came direct from them vs some reseller that may have had them on the shelf hopefully you will get the corrected version.
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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock.
95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow.
81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong.
15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out.
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Old 09-16-2015, 12:08 PM   #5 (permalink)
Phil 44
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Tugboat,

I got the DE, turbo back with crossover and installed it on a 1998 K-3500. I suggest leaving everything loose until it is completely installed so you can twist and adjust as you go back. A couple of things were pretty tight but once adjusted, it all lined up and it works great. Keep track of where your brackets go and it should be pretty easy. The truck is a bit louder but I am happy with the system.
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Old 09-17-2015, 01:10 AM   #6 (permalink)
Graplr
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Quote:
Originally Posted by 57diesel View Post
Unless they changed it the DE crossover can be a pain to install because the diameter is so large at the flange end there is not clearance for little things like washers, flange nuts, or even the wall thickens of a standard socket.

Again unless they changed it you don't get any hardware for the flange end or the 'donut' gaskets so be sure to get that stuff before you start. I used band clamps on my whole system because they allow you to easily adjust things if needed. I had to re position the cross over a couple times to get it to seal and access the nuts so it was very handy there.

DE also apparently had some issues with the down pipe not quite being bent correctly. It was a big issue for Burbs because of the rear heater lines happen to run right where the pipe ends and it ended up so close that it would touch them. Pickups seemed to be less of an issue. Others reported the problem to them and apparently got replacement pipes so if yours came direct from them vs some reseller that may have had them on the shelf hopefully you will get the corrected version.
Hmmm....I had absolutely no issues installing the DE on my burb. Went on very easily. I pulled the inner fender (or actually I think had it out for something unrelated at the time) which helped with getting the down pipe on. I ordered mine from Summit I believe. Pretty sure my crossover is an aftermarket from eBay, not a DE but no issues with it either.
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Old 09-17-2015, 12:38 PM   #7 (permalink)
DetroitTahoe
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I have one on my Tahoe as well. Sounds great (mine is just a stright pipe though) and went on fairly easy.
Like Phil said leave everything loose untill you have ALL the pieces on and hung.
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1995 Chevy stepside SAS swap Dana 60 14 bolt, 383 stroker 5spd 4:10

Heath PMD, Max torque ECM and turbo master, feed the beast mod, fuel pressure gauge, F code intake manifold, K47 air filter, 2.5" crossover pipe, 3" down pipe to 4" Dimond Eye straight pipe, Boost gauge, battery terminal mod, 2/0 battery cables, high idle switch, Lubrication specialist oil lines and cooler.
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Old 09-17-2015, 07:22 PM   #8 (permalink)
meangreen1500
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Is there any interior drone with this set up?
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Old 09-18-2015, 12:55 AM   #9 (permalink)
57diesel
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Pickup guys don't seem to complain about drone. Some Suburban guys (like me) do think many of the systems drone. Theory is the Burbs have the big echo chamber, pickup don't.
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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock.
95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow.
81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong.
15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out.
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Old 09-18-2015, 12:59 AM   #10 (permalink)
57diesel
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As far as the fit my theory was the quality control was not real good on the down pipes. I assume the pipe was CNC machine bent so it was likely correct. To me it looked like the flange at the turbo end was welded on so either the jig was not real accurate or the people loading it didn't care. It may not have been as much of an issue with the pickups so the bosses didn't care either but the burbs with the rear heaters there just is not much wiggle room.

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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock.
95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow.
81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong.
15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out.
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