Pookster
1/2 ton status
You shouldnt spool up much, if any. Plus, you need time to spool- So unless your always on the skinny pedal, you shouldnt have much problem. You can also adjust the boost manually, and just turn it off when your off road. 
CK5
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diesels?
- Thread starter 83' k5
- Start date
this ofcourse brings up the issue that if you're building a trail rig w/ a diesel, and you are going to need crazy amounts of power offroad, you are probably going to not want the diesel - since a turbo won't provide it in most circumstances offroad.
colbystephens said:
If a 6.2/6.5 is the only diesel option in that case.... A 4bt Cummins can make a BBC look whimpy and a 6BT can make a built BBC run and look for it's mommy.
colbystephens said:that's pretty freakin impressive! i'd love to see those numbers on my rig someday!
rjfguitar - from what most the guys are saying on the diesel board, it's difficult to get the turbo to spool up during crawling because it needs a load to produce the boost. don't know how much that figure into your statement. i'm not familiar with turbos yet.
You don't need boost when you're crawlin...but at least in the mud it'd do better (not that I've had any trouble spinning my 39.5's with the NA 6.2 so far...)
Rene
83' k5
Registered Member
I was wondering what setup tRustyk5 had. Are your fenders trimmed? Lift?
Because from what you have said it sounds like you have what i am going for.
Because from what you have said it sounds like you have what i am going for.
Here is my junk...
6.2, SM465, NP205, 60/14 with 4.56's, 4" Rancho (crap) lift, 1" body lift, 39.5" TSL's, a tiny bit of fender trimming.
Currently rebuilding an NV4500 for it and hope to run some 37" AT's for regular driving. It is my DD, but it kills me to burn up perfectly good TSL's on the road.
Rene
6.2, SM465, NP205, 60/14 with 4.56's, 4" Rancho (crap) lift, 1" body lift, 39.5" TSL's, a tiny bit of fender trimming.
Currently rebuilding an NV4500 for it and hope to run some 37" AT's for regular driving. It is my DD, but it kills me to burn up perfectly good TSL's on the road.
Rene
ProJunkRacing
1/2 ton status
83' k5 said:
where abouts in IN you at
83' k5
Registered Member
I live in cromwell. REAL little town northwest of Fort Wayne about 45mins.
85-m1028
1/2 ton status
the torque of a diesel will get you off line give the butt dyno a good push, adding a turbo will not help this, the point at which the n/a horse power tops out and the turbo spools up to give boost is called turbo lag, smaller turbos will spool up faster and bridge the low end gap better, couple this with a good free flowing exhaust and low gearing and the 6.2 will be a great choice for a k5 with a built 700r4, I'd go with a hmmwv 6.2 keep the drivers side exhaust manifold (ceramic coat) and use a larger conecting pipe to the passenger side manifold (1/2" larger than what banks uses and wrap with insulating wrap) 1" body lift to get 3 1/2" down pipe from the turbo and finish out with 4" from the muffler back, add one ton running gear and some 37" rubber 4.88 gears, voila!! man oh man not to mention the 20mpg you'd most likely get as well!!
83' k5 said:
i think what rene runs is about what every diesel k5er on here wants.
except i want to run a turbo too. 
I'd rather have a "clean" K5 (meaning no cut fenders, all the silverado trim on and in tact, nice shiny paint, aluminum rims) with a 4 or 6bt under the hood and 4" strait pipe with a Diamond Eye muffler(nearly strait through). People would expect something like Rene's truck to potentially have something different under the hood when everyone is out together on the trail, but buzzing around town and both the Chevy guys and Ram diesel guys would take notice with some raised eyebrows because they wouldn't expect a Cummins growl out the back of a "1/2 ton" K5.
colbystephens said:i think what rene runs is about what every diesel k5er on here wants.
It's on my list, just not near enough to the top of my list yet...getting tranny and T-cases sorted out right now, then maybe finally getting the alcon's under it first...
Like everyone else I also have the never ending project.
Rene
rjfguitar said:I'd rather have a "clean" K5 (meaning no cut fenders, all the silverado trim on and in tact, nice shiny paint, aluminum rims) with a 4 or 6bt under the hood and 4" strait pipe with a Diamond Eye muffler(nearly strait through). People would expect something like Rene's truck to potentially have something different under the hood when everyone is out together on the trail, but buzzing around town and both the Chevy guys and Ram diesel guys would take notice with some raised eyebrows because they wouldn't expect a Cummins growl out the back of a "1/2 ton" K5.
I could think of many better 'sleepers'...
Rene
beastofablaze
1/2 ton status
The following is my opinion:
I guess there will always be a big ass line drawn for me when it comes to diesel vs gas... personally I think a bbc will absolutly destroy a turboed 6.2 or 6.5 when it comes to everything but mpg. You may not want hp now but when your stuck in mud because you don't have enough wheel speed with that 3600 rpm red line you might wish you had a bb... more tq and twice the hp for about the same price (maybe a little more).
A Diesel sleeper would be cool but you'd have to throw some $$$ around to get it to be something to brag about... 1300 ft lbs only equals high 12's in a 7000 lb truck... of course your talking about dropping a newer diesel in a k5 but my point is dollar for dollar I think gas is the way to go as far as hot rods go.
Ok I'm done bashing diesels... LOL
They do tow better though.
I guess there will always be a big ass line drawn for me when it comes to diesel vs gas... personally I think a bbc will absolutly destroy a turboed 6.2 or 6.5 when it comes to everything but mpg. You may not want hp now but when your stuck in mud because you don't have enough wheel speed with that 3600 rpm red line you might wish you had a bb... more tq and twice the hp for about the same price (maybe a little more).
A Diesel sleeper would be cool but you'd have to throw some $$$ around to get it to be something to brag about... 1300 ft lbs only equals high 12's in a 7000 lb truck... of course your talking about dropping a newer diesel in a k5 but my point is dollar for dollar I think gas is the way to go as far as hot rods go.
Ok I'm done bashing diesels... LOL
They do tow better though.
i can appreciate what you're saying - but i think it's important to understand that the motors were created for two different purposes. thus, comparing them as one being better than the other is not really a proper comparison. also, fwiw, it doesn't redline at 3600 - it's governed to it. if you could handle the noise of a 3600rpm diesel, you could run it at that all day.
trailblazr81
1/2 ton status
Just pick up a World Products 454 small block. 600 HP and 605 pounds torque. 10:1 compression with aluminum heads. Alot lighter than a big block or deisel. You could spin 44's with ease in goo. Tho might have to sell a Kidney to cover the $11,000. price tag. 
12's in a 7K truck is extremely impressive. When was the last time someone was able to run in the 12's with a K5 around here? Gas, diesel, propane, steam....anything?beastofablaze said:
I have almost instant 5-6 lbs ofboost on my truck. no lag. but it depends on how you set it up. i've got a 6.5 turbo setup on my 6.2, and 3.42 gears, and it spools quickly. thats the downfall of banks turbo not having a wastegate, takes forever to spool up.
Its also very controllable, no powerband surge on mine like a gas engine with turbo has, just smooth torque.
Its also very controllable, no powerband surge on mine like a gas engine with turbo has, just smooth torque.
beastofablaze
1/2 ton status
rjfguitar said:
K5's don't weigh 7k... I was talking brand new duramax, cummins, powerstroke with 5 grand + put into em territory. Like I said you'd have to drop some serious $$$ to make it something to brag about...diesel and speed are not commonly used in the same sentence. A stroked sb or a 454 could push 600 hp n/a for around 6k... add a blower and your talking 900+ hp for 9k on a brand new motor.
I don't want argue... 12's is impressive but a bb or sb can run those times for less money.
my guess is the guy with the blown 540.
beastofablaze
1/2 ton status
colbystephens said:
Not sure I agree with that... numbers are numbers... If you actually compare the off idle torque of a hot sb or mild bb I'd bet most people would be suprised to find out that (depending on the setup) the tq numbers will be pretty damn close. you still have to spin a diesel up to get it to pull... they don't grunt right off idle. I say that having towed with deisels.
its your rig man... just get what you want. Judging from your sig it's gonna be a diesel.(boooo)
