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Putting a Chip in a 6.5

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24K views 41 replies 21 participants last post by  90GMC62L  
#1 ·
Im browsing the market for a 6.5 for my first truck (Tahoe, Suburban, 1500, and 2500 are what Im looking for) and one of the reasons why is the fuel economy vs the gas counterparts. I wouldnt consider myself a diesel "purist" and have no reason not to put a chip in a truck. If it gets me better MPG, then Ill do it.

So I have a couple questions on chips, sorry if its common knowledge to you guys, but Im 16 and still learning :)

1 - which chips work best? I remember reading that you need different chips for different years, fill me in.

2 - one company I have heard of (Hypertech) makes chips for HP, Smoke, and Economy. Would it be do-able to buy the HP and Economy chips and switch them out depending on the task? Like taking a road trip or hauling a big load.

3 - how do I go about installing a chip?

Thanks guys, I love the help I get here
 
#2 ·
heath diesel ecm
 
#3 · (Edited)
The answer to your questions vary depending on the year of vehicle you are dealing with. If you buy a 94-95 6.5L which are controlled by the OBD1 computer, you actually change the e-prom or "chip". If you have a 96+ 6.5L you have to have the computer re-flashed to a different tune.

As far as which tunes are better than others, well that is really a matter of personal choice and opinion. None of them will give you HUGE numbers like in the modern direct injection diesels, but all of them will give a good improvement to the way the 6.5 runs and feels.

With the OBD1 computers, you could buy two different tunes, but you have to pull the computer out of the truck, take the cover off, and swap the chips. This is doable, but also a bit of a PIA. However there is one guy out there who has come up with a multi selectable tune chip that will hold 3, and maybe even 5 different tunes IIRC.

On the OBD2 controlled engines, you are stuck with one tune only unless you have more than one ECM and have each one flashed to a different tune. This would be expensive!
 
#4 ·
The one you are referring to can do up to 6 tunes. Mine will be in about mid-end of the week. Will report back
 
#5 ·
How can I contact this guy? my friend is looking for a chip for his 97 6.5.
 
#8 ·
Sounds like Buddy's chip for a 94-95 is what you want. I love mine. The tunes are very well set for their jobs. I saw roughly a 12% gain in fuel economy, and would expect slightly more with some fine tuning. I don't use the tow tune, but the tow with second gear converter lockup (same thing, but locks the converter in second) has a very good shift feel and just the shifting/TCC control of the transmission makes it feel very strong. This tune, if abused will slip the transmission though. The race tune is pretty close to comparable with my LB7. All tunes are exceptionally clean except the race tune trying to get the charger spooled. Another advantage to the Buddy chip (I think Kojo may also have this advantage) is the ability to push more than 80mm^3 of fuel. I won't comment any more on that since I don't know how much he wants to keep that stuff hush-hush. The others don't have the additional tables defined to do this and can't get any more than 80mm^3 of fuel which greatly limits power from the DS4's full potential.
 
#9 ·
Where do you get in contact with this guy?
 
#15 ·
What do you mean when you refer to the amount of tunes a chip can take? Say I get one that takes one tune, does that mean I am stuck with the one tune and if I want another I replace the whole chip?
 
#16 ·
It depends on the vendor and the year of your truck.

For pre 96 most chip tuners supply only one tune for the money and yes the chip would need changed for a different tune.
There is like mentioned a possible 6 tunes on one chip changeable on the fly but only Buddy does that at this time.

For 96+ only one program per ecm period,if you want to change the whole ecm needs reflashed or changed out completely.
 
#18 ·
So it sounds like pre 96 is the easiest way to get a tune?
 
#20 · (Edited)
I have not posted in a while, but I'm still around, my user name is buddy on TTS.

From all that I have reviewed, Heath is probably the most progressive tuning, closest to what I do, although some of it is a little extreme for towing without water mist injection and a larger turbo, and I am not sure they will offer the max fueling capability. I do know that Heath will get a little over 80mm3. If you ask for something to tow with, safely, then it just wont be quite as hot, not quite as quick.

The mulitple tune chips were discussed in a thread called "6.5 tuner" but you'll never get there through search, but you could search for "tuning" and my user name with advanced search.

I like the OBD1, because tuning is easier, no passlock theft system to worry about, I prefer the accessory setup in the engine bay and the single thermostat crossover. It makes timing the IP way easier and swapping IPs. The GMTDScanTech scanner is awesome and inexpensive, only available to OBD1 6.5s. And I really like the seats in the 94s ;v)
 
#24 ·
94c1500, look at post #20 on page 2.
 
#23 · (Edited)
I as well as others can and will tell you,, do not get all wrapped around the axel with "Chips" or "Reflash" or add on Tuners. Although they do add substantial powwer to the ass end of a truck the cost does not stop there! keep your wallet handy and work any overtime you are allowed or even pick up a second job. Your gunna need it!

My dodge and i refer to the cummins engine as opposed to the 6.5 platform makes increadable power with a diablo preditor and a power puck stacked and just on econ tune. But ,,, here comes the get your wallet ready part... You better beef up anything around your truck that is going to receive more power. I.E Tranny, Inner cooler ( Which the 6.5 lacks) Getting more cold air, and will never achieve the power the others have because of this, and injectors that can deliver more fuel as needed. everytime i take the dodge to the dealer when it decides to go south before me its 900$ Min. injectors and so on.

Do the basic mods for your chevy and drive it like it is intented and not peel off 1/4 inch of rubber on burn outs and boost launches and youl be fine. In fact good luck getting tires to break traction on dry pavement for a burnout anyway. Nearly impossible. to reach 250+ HP at rear wheels on the chevy 6.5 you better pull out some serious cash and invest and youll always be turning a wrench of somesort. Now the newer Gen diesels are delivering 325+ RWHP outta the assemb ly line. and you can keep adding to that with a severe cost. I know for fact I lived it!!

the best MPG your gunna get outta the 6.5 platform is doing maintanance mods as awell as longivity mods and wearing light shoes to keep off the pedal! when some one says "Smoke" tune, smoke is almost always associated with trouble! Looks cool in certain applications but in the long run, it aint cool to be broke and have no money because your power greed got you in debt up to your anus hole! heavy loads??? wanna haul Heavy? 15K plus? get a newer diesel that can handle it. The 6.5 is a mid range work horse and that is all it will ever be IMHO. But serves its purpose flawlessly if maintained and taken care of like a fine woman. make her feel good and she will return the favor! Coke her all up and on day 4 she is gunna crash hard and lay there like a useless, expensive projecT. Just my .02
Be the smart Kid Hugh. While your friends are always turning wrenches, ( BTW, with a 6.5 you will have to turn wrenches! Welcome the the world of the 6.5 Detroit Deisel) make your truck make you money and not cost you! When your friends tear the teeth outta there trucks, you will roll past with a load of wood, or pulling a landscaping trailer on your way to let your chevy provide you with income instead of robbing you of it! My Moral of the story:) Best wishes young friend you will no doubt learn alot about diesels with a 6.5 without losing or gaining gray hair.
 
#27 ·
pppppffft...... get your facts straight there bud.... the above post makes you look like you know little about diesels...:think:
 
#26 · (Edited)
If you read the whole message it was advice and lesson learned for the initial (INITIAL) thread maker. Not you! It isnt about you anyway. I was trying to help a young man with questions thru the termoil of the 6.5 and lended my experiance on coke'ing up his rig.

Obviously it hit a nerve and i stand by my word that if something offends someone , look closely you may be guilty!! PERIOD!

Your thread popped above it and I can see where it looks like i was talking to you so for that I am sorry you didnt read the "Whole Message and decided to fire away! I too have been addicted to getting max outta truck and again, The moral is, Be preparred to have a good supply of cash available.

Now ,, have a latte and a cookie
 
#28 · (Edited)
This is a case when someone is hijacking other people's thread.
Plus, it is an old thread from 2011.
Yes, that is around 4 years ago.

I realized the same topic but 2 different member (or may be more) are asking questions.
The OP has not even login anymore. LOL!!!
Another member got offended.
A price to pay for reviving old thread.

Have a thick skin and don't get offended easily in forums.
We are all a nobody here, unfortunately.
None of us have never seen each other and so on.
 
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#30 ·
I am somebody. Now I'm offended!:whistle:
 
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#36 ·
Either an 88-93 or 99-02 6.2/6.5 pump, preferably AC Delco. Or a Walbro FRC-10 which is what I have.
 
#39 ·
Thanks guys. Yeah my lines are rusted out so I'm going with the Delphi pump just because that's what buddy recommended and since I'm getting the chip from him I'm going with that.Also because I need to do all new lines. Has anyone done the FEED THE BEAST? And is it worth it I'm about to do valve cover gaskets and was wondering if anyone noticed a difference? I don't want to do it if its pointless I really just don't want to have a leak on the fuel filter housing after I get it back together.
 
#40 ·
Take a look at my build thread. I did my own version of it, but so far I genuinely noticed better throttle response. My friends truck benefitted as well. It can't hurt, it can only help.
 
#41 ·
FTB is a fairly important mod. I noticed less lugging, more low end torque and just a puff of black smoke when warm starting after installing it. I bought Walking J's kit and was satisfied for the most part. I didn't like that they use a 90* fitting at the IP, it's awkard to get it to fit right if you run the fuel line under the intake. When I redo the fuel system I'll be replacing it with a 150* -AN fitting if I decide to run the hose under the intake or I'll use another 90 and run the hose up top.
 
#42 ·
That's basically what I noticed too, it seems to have a little more low end than before and same thing with the smoke. It was worth it to me, although mine cost A LOT more.