Place where I work bought a 6.5 for a work truck :'( and me being bit by the bomb bug and all, was wonderin what mods can be made to the clunker besides airflow. Can't figure out why they didn't get a real pony, maybe I need more smoke and ponies for those times I drive by the office and try to make it disappear(the office) to convince them next time.<br>carty

 

I used to own a 6.2...... I'm sorry...


Seriously - a real good source of information on General Motors Diesels can be found at TheDieselPage.com - Jim Bigley over there has a pretty lukewarm 6.5 running in the 300 horse range. Heres the article on Jims truck.

 

I have heard the best trick is to fix the turbo down pipe. It has more bends and kinks in it than it requires.. <br><br>Also the plastic cover that says 6.5 is worth about $2000.. That is, get rid of it as the heat in the engine well eats the pumps out... <br><br>Bout all.. The 6.2-6.5 Diesel page is pretty good too. <br><br>J-eh

 

6.2 6.5 <br>Had them both. I did not like them both. The 6.5 was the worst. had more problems out of it than any other truck except my 95 powerchoke<br>DM01

 

You can turn up the fuel with a 3/16&quot; allen. It's under the fuel sol. cap with 3 small bolts. Just make sure you disable the glowplugs, you may have to bump the engine over to get the hole lined up. That's what did me in, I had to bump one over and didn't kill the glowplugs....RUNAWAY!<br><br>try these:<br>http://www.peninsulardiesel.com/<br><br>http://www.kennedydiesel.com/<br><br>The peninsular place has some real perf. engines, even a twin turbo 400hp 6.5

 

Had a 87 1/2t 4x4 w/6.2 put in a banks turbo then got bit hard and bought a 6.5, peninsular marine injection pump 300hp model, marine injectors, gear drive and used the banks exhaust...it dynod at the back at 302hp and 511tq was great runnin truck cept for the tranny... shoddy tranny shop promissed they could build a 700r4 to handle it...no dice...shredded 3 tc's...had to trade it in in Fargo ND on a 2002 1ton CTD...totalled that and now have an 03 3/4t CTD..the 6.2-6.5diesel page is a great site for the chebbies...they are cheep and easy to work on if you have a mechanical pump..the lectric ones are more difficult...good luck

 

My dad's got one. Replaced an injection pump at 70,000 and glowplugs and lift pump at 60,000. Alternator at 70,000 also. Tranny is fine and we tow a 10,000lb gooseneck once a week and I powerbrake the you know what out of it. Took the airbox completely off and added flowmaster duals. Helped a little. Smokes better than mine. :'( So I should take that plastic cover off?

 

[move][glow=red, 2, 300] YOUR DADS TRUCK SMOKES MORE THAN YOURS!!!J/K BB[/glow][/move]

 

[move][glow=green, 5, 500] AT LEAST I HAVE A TRUCK!!! J/K SPD03[/glow][/move]

 

Chevy had both NA and Turbo versions of the 6.5. They have high compression 21.5:1 and low boost 6-7psi max.<br><br>The 93-94 model Turbo versions ran better (rumored to have more factory hp and more reliablility than advertised) than the 96 up versions due to a mechanical turbo wastegate and mechanical injection pump which permited easier owner tuning. <br><br>The 95 year was the year of transitions from the mechanicals to the electricals.<br><br>The 96 and up are all electronics (turbo wastegate and injection pump). The best feature of these rigs is the better cooling system which eliminated the overheating problems the 95 and earlier trucks exhibited under laoding and the electronics when they are working properly.<br><br>Best performance upgrade for the 96+ turbo truck is the Banks stinger system. Made my truck around 250hp and 425tq. This replaces the downpipe and cat back with 3.5&quot; pipe (catalytic converter remains, you be the judge). The kit also comes with the K&amp;N filter.<br><br>The 95- rigs with turbo and the Banks kit gets a recurved turbo wastegate, better air cleaner box and modifications and the aforementioned exhaust system.<br><br>The non turbo 6.5 and 6.2 trucks with the Banks Sidewinder will blow the factory GM turbo trucks off the road from more boost and better design.<br><br>On my 97 6.5 turbo d truck I went through 4 injection pumps in 52000 miles, two lift pumps, one fuel pump, three fuel caps and one set of wiring harness connectors which I spliced into the factory GM harness Ford connectors (yes the ford ones work on the GM harness and pump). The last time it was out of time warranty...not milage warranty and GM prorated the repair at 1200 (good riddens).<br>