1999 6.5L Performance upgrades

[scot5146]

Hey everyone-

Ok well this is the story I have moved from the 6.2l diesel section because my 1987 Suburban blew up and i am tired of dumping money into it so its going to be a parts rig...

Anyway my NEW (at least to me) 1999 K2500 suburban 6.5L diesel with 100k on it just pulled into my driveway and shop...

Now I am excited to put on some upgrades to get the best combo of power and towing ability as well as mpgs...

SO ANY SUGGESTIONS ON WHAT I SHOULD CONSIDER DOING TO IT....?

It was regularly maintenance and has no issues, the past owner is the original and a good friend of mine...

I was thinking of 4 inch down pipe/ exhaust, cold air intake... And curious about water/ methanol injection (has anyone used it and is it safe for a diesel)

Maybe a upgraded cpu from heath or ssdiesel etc... Any ideas? oh and a special thanks to everyone who helped me try and fix my old 87 6.2L...

[6.5 Detroit Diesel]

Do the four inch. It will make a world of difference along with a good d/p. sounds like your on the right track to start.

following the exhaust, get a program done for the truck in conjunction with some sort of turbo control.

personal opinion is to use heath or kennedy. ssd sucks.

i am working on a different intake system for our 6.5's, but if you are keeping the stock box, get a good filter. current CAI on the market are pretty crappy. they will work if you port behind the marker light, otherwise, they draw air from a hot area.

w/m injection can be used safely. i ran a system on my truck that made a huge difference in cooling and with a 30-35% methanol mix made a very noticeable difference in power. most guys would run like a 10% mix on the 6.5's.

If your still looking for some more power, then hi-performance injectors in conjunction with your program.

while your doing all this, don't forget your cooling. w/m injection will take care of that, but if you don't do that, look at upgrading your cooling system.

good luck with the burb'!

[6.5 Detroit Diesel]

oh, and i didn't ask, but i am guessing the PMD is relocated?

if not, you can extend it.

make sure the ground remains running to the pump or you won't get a start.

i moved mine in behind the drivers headlight. keeps it cool and out of the way.

[Kennedy]

Gauges first, then exhaust, chip/programming, and injectors.

A 4 " exhaust will gain you nothing but noise over a 3.5" system.

Make sure that the raidator is clear.

[ted2020]

What is the advantage of relocating the PMD?

[6.5TDTahoe]

Not made ! 3 in. mandrel bent is is the largest down pipe made & will fit.. The rest can be 3 or 4in. STANS in washington state has the complete kit. Enjoy your new ride.

[16gaSxS]

Gauges first, then exhaust, chip/programming, and injectors.

A 4 " exhaust will gain you nothing but noise over a 3.5" system.

Make sure that the raidator is clear.

I'm with John........

[scot5146]

thanks everyone! I found a exhaust system and I am in process of relocating the PMD...

How about CPU upgrades and Cold air intake, any specific brands to buy/ watch out of etc...

also my rig seems to be running very cool, maybe (180*) is this OK?

Thanks Again

Mike (New Guy)