Twin Turbo 6.5 In 1/2 Ton [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Twin Turbo 6.5 In 1/2 Ton


Durallymax
11-06-2007, 11:05 AM
Note to Mods: I dont know which section to put this in so I put it here.

So old blue id basically dead, motor is fine with only 70,000 miles on it. Clutch is OK and 5spd tranny is sloppy and has a bad 2nd gear synchro but still works.

My dad was going to sell it, but he doesnt think anybody will by it.

Its been giving troubles with the master and slave cylinders, weve replaced them 5 times in the last 3,000 miles.

And the rest of the truck is just falling apart.

So he asked me If I wanted to yank the motor and put it in something else. Immediatly I got crazy ideas but Ive come to my senses now.

I do realize that it is a 6.5 and I know theres no true tire squeeling potential. But heres what Ive come up with.

Build a budget motor. I was going to just find a second stock turbo to make a homemade twin turbo setup complete with homemade headers and stacks out the hood. Or I might use two Holset HX30W turbos as they are pretty cheap used.

I was going to have the local pump shop tweak the pump a little more and I might put some marine injectors in it.

Ill take the pistons to my neigbor and lower the comp ratio to around 18:1 which ive been told is taking 1mm off.

Ill deck the heads and maybe put some O-rings in it.

Im thinking that im going to be too cheap to puthead studs in it though.


Thats basically it for the motor. No intercooler either as its basically a screw off weekend truck.


Then Im looking at putting it in an older 1/2 ton reg cab short bed 2wd. I basically want to do this because it will be light and cheap.

I think the clutch may need to upgrade down the road too.


Let me know what you think of the project, any ideas/tips. O rif there is an easier truck to swap it into. Also what difficult things am I looking at as far as the swap goes. I might just completely swap every nut bolt and wire from the blue truck into the Half ton. Dash and everything.

Again any input is appriceiated thanks.

tripstyleracing
11-06-2007, 04:40 PM
hows the body on it? You may be doin a budget build, but if the rest of the truck is crap, then it may not be worth the work... I did the same thing with my old 78.. replaced the motor and put a nice exhaust on it as well as a bunch of other stuff.. But the body was deteriorating fast and when I had to move I barely got any money for it...

Cowracer
11-06-2007, 04:45 PM
I do realize that it is a 6.5 and I know theres no true tire squeeling potential.



Uh, my 6.5 will roast all 4 across the back end with little effort.

Tim

Diesel Dually
11-06-2007, 05:19 PM
I moved it, but left a re-direct.

Deere3594
11-06-2007, 06:15 PM
Uh, my 6.5 will roast all 4 across the back end with little effort.

Tim

same here

Durallymax
11-06-2007, 07:19 PM
Thanks for moving it.


I havent found a 1/2 ton yet, I just planned this the other day.

9c1cap
11-07-2007, 11:29 AM
Sounds good...I say go for it. What kinda boost you lookin for tho? I wouldnt skimp on beefin up the bottom end or the head studs....Seems like that should be a priority on this build in my opinion...

nosmoke_97
11-23-2007, 09:20 AM
I thought about the same thing, I'd say a 1/2 ton 2wd would skoot, not to mention it would be the easiest swap ever!!!

monel_funkawitz
11-23-2007, 09:51 AM
I'm still puzzled why someone would go through the hassle of a dual turbo? You aren't going to gain anything. The single stock turbo alone is enough to show you the insides of your engine.

If it were me, here is what I would do. I would throw it in a cheap 4WD with a good lift, and make a mudder truck. You wouldn't have to worry about a wet ignition, and if you located the air intake to the cab, you could go in water deep enough till you are eyeball to eyeball with fish. As far as a performance 6.5, I'd put my time in something productive, like changing the oil or putting stickers on it or something.

RCpullerdude
11-23-2007, 12:30 PM
Ya know them stickers alone add 10 HP each. 4 and you've got 40 extra horses! Haha.

nosmoke_97
11-23-2007, 02:46 PM
The only way I could see twin turbos helping is with lag and allowing more air not psi but just more amount wise, but like monel said its useless or pointless.....

grape
11-23-2007, 02:52 PM
http://i187.photobucket.com/albums/x199/grape09/kaboom.jpg

matuva
11-23-2007, 03:56 PM
Holly cow!!!

monel_funkawitz
11-23-2007, 04:15 PM
Holly cow!!!


Yeah, I'm pretty sure the driver said the same thing in different words.

nosmoke_97
11-23-2007, 04:24 PM
I think it started with FUU and ended with UCK..... I would hope he was wearing his Ooops-I-crapped-my-pants......

monel_funkawitz
11-23-2007, 04:35 PM
Don't matter what pants he wore. Fire done burnt 'em anyway.

viking
11-23-2007, 04:47 PM
And prepair to meet your flywheel :eek:

Durallymax
11-23-2007, 07:22 PM
You must not understand what Im getting at.

I know twin turbos will do absolutly nothing and the 6.5 is a waste of money when it comes to performance.

The turbos will add more lag as it will be true twins. Not staged twins.

The only reason I would do twins is for bragging rights, and because Im bored and just need something pointless to tinker with.

As for 6.5 performance I am only squeezing a little more out of the pump. My goal is to spend nothing on this truck.


I dont want a mudder.



Nice pic, I see the blower hold down belts did a whole lot of nothing.

95DuallyTD
11-23-2007, 08:12 PM
Actually, I'm betting the hold down straps are doing exactly their job. That blower would probably be 75 feet in the air without them. They are designed just to keep the blower from flying into the crowd (they came about after a blower went into the crowd). I don't know much about 6.5's (YET), but drag racing IS my area of expertise, lol.

bgittens
11-23-2007, 09:09 PM
The only reason I would do twins is for bragging rights, and because Im bored and just need something pointless to tinker with.

As for 6.5 performance I am only squeezing a little more out of the pump. My goal is to spend nothing on this truck.


Bragging rights mean nothing if the motor doesn't run. Why not put a little bit of money into safety (i.e. head studs) and play with performance as you can afford it?

IMO, a high ratio rear end will give you a bit of performance and will be a lot cheaper to fix when you grind it up.

confuzed_guy
11-24-2007, 01:37 AM
I'm still puzzled why someone would go through the hassle of a dual turbo? You aren't going to gain anything.
What about faster spool up and lower EGTs with the deletion the a crossover. Getting the second turbo around the steering, well, that's another story :P