water/methanol injection vs intercooler
 

Which one is better for the 6.5td? Or both? I'm just unsure about the water/meth on my daily driver. Any thoughts?

To put a intercooler on a 6.5 is difficult because of the space you have to work with on the truck. Most people run just water injection. On a daily driver it is supposed to work good because you don't have to run it full time and they say when pulling it really helps cool them down.

Hmm good point. I got to lookin and there isn't a lot of space for an intercooler. Who makes a good kit for the 6.5 that doesn't break the bank? Or a universal kit?

Heath diesel is the only one I know of that makes one for the 6.5.

i looked at the heath one Heath Water-Mist Injection system but $529? That's a little steep for me. i read on his site that he recommends running only pure water. is the methanol detrimental to the 6.5?

devils own and snow make kits for the 6.5. since the 6.5 is idi too much meth can lead to pre ignition compared to a di diesel that can withstand a lot more

ah okay. thanks

1998 K2500 GMC Sierra, 6.5 Turbo Diesel - Devilsown Methanol Alcohol Water Injection

:)

You cant go wrong with water injection. Its Cheap insurance for towing and works well for sure. Mine only comes on when first getting up to speed, and pulling hills when towing my 28' travel trailer. I usually only run about 10% alky and 90% water (distilled water). I figure the alky will stop any green sh*t from growing in the holding tank. Good luck with your project and let us know how it goes.:c:

alright here it goes. finally got the time to do my ata install on the ole 6.5. its a navistar intercooler 28x12x3in core, i think its off of a newer powerstroke but im not sure. i took it to the local radiator shop and had them move the in/outlets to the bottom. i started by taking the grille,hood latch, center support, condenser off (there was nothing in my ac system so no problems but if yours is full and your attempting to do a similar install i would suggest having it drained or something) and loosening the radiator and oil cooler and my aux trans cooler.
[IMG]http://i1188.photobucket.com/albums/...e/2cd99161.jpg[/IMG]
Then i had to cut about 3 inches out of the core support on the side and cut holes in the base of the support for the in/outlets.
[IMG]http://i1188.photobucket.com/albums/...eme/photo1.jpg[/IMG]
then i drilled holes in the top of the core and made a mount for the bottom of the support.
[IMG]http://i1188.photobucket.com/albums/...eme/photo3.jpg[/IMG]
thats as far as ive gotten, gotta wait till next pay check to buy the piping. then i gotta find a new home for the oil cooler and fab a couple mounts for the ac condenser. it was a tight fit with that big of an intercooler. i had to have the mounts angled inwards to clear the frame.

Where do you get distilled water in large quantity's, I have well water, what would be bat using plain well water??

Actually, 6.5's don't respond well to much meth/alcohol.

They don't like drugs.

You will get more power, but the design is weak so it leads to early failure. Should be kept to around 5-10% at the most.

Straight water is usually the best bet with a 6.5, mainly for egt control.

While I'm not going to argue that distilled water is best ('cause it is!), i just fill my tank form whatever source is available.

I hauled my trailer from Vancouver Island to Newfoundland (the island part) last year and filled it from everything from store bought "jugged" water to camp well sites.

No build up, no problems.

YMMV....:humm:

Sorry, your 3.0 Merc is not a 6.5 GM.

Just because they're both IDI does not make them the same.

The Merc has much more power potential and it is a more robust design in many ways.

GM really missed the boat with the 6.X series for anything other than MPG.

The 6.5 Gm does not do well with more than 5-10% meth/alcohol....tops.

*post deleted by OP*

You know, I started typing up a detailed response refuting what needed refuting. But halfway through I simply deleted it.

I lost my taste for this sort of thing on the internet a long time ago and have no desire to get involved in it now either.

I'll simply say I stand by my original statements, the readers can make up their own minds and that I'm done with this thread.

Removed by OP.

Mods please delete

Both! Both will cool the air and the methanol in the water injection will add horsepower. I use -20 washer fluid and a 4gph nozzle set to come on at 12psi.

You guys are so keen to argue with that guy about it, why do you shut up all of a sudden?

For prolonged use how much water does water injection use? For going through mountains how many gallons would one need to have?

Your nozzle will directly determine that. They are always rated in gallons per hour or cubic centimeters per minute.

1g/h = 63 cc/m

3 gallons should be considered the minimum tank size, 5-10 gallons if you tow a lot.

I concur with Whargoul. For instance, I just got back from a weekend trip up in the forested mountains in beautiful southern new mexico. I have a 10 gallon water /alky tank, and Im using two 150cc nozzles on my set up, 300cc's total. I drove up hill between 6 and 8% of incline. I drove 31 miles uphill and used 2 gallons of wtr/alky. I was going roughly 45 mph, and towing a 28' traveltrailer weighing approx. 8800 lbs. My EGT's were right at 1000 degrees the whole way. Im not sure how long it took me in minutes tho. Some of the curves were switchbacks and had to slow to about 25 mph. Hope this helps. :c:

Impressive build. I fear that the warnings about too much methanol are valid in the 6.5L application. Unfortunately, the head gaskets are known to be weak, and the precombustion chambers can work themselves loose in stock form. Best of luck to you.