572 2dr tahoe

[99silveradoguy]

its nice to dream at 15, then 18 rolls around and real life kicks in :LOL:

anyways plan backwards. youll need to upgrade your suspension, frame,rear end, transmission, driveshaft and brakes. having a bad ass motor with a blown rear end or blown tranny doesnt work to well

[98GreenMachine]

If you lay frame on 22's in a 4wd OBS with a 572 in it then I will drive across the country to see that bad ride.
Not that it can't be done,but you can jack the price wayyy up.
Lowering a 4x4 and retaining a good geometry isn't really a problem,but bagging a 4wd and keeping it functional use's part's of the frame that would be taken up by motor I think.
Not that it can't be done,just saying it will be a huge project and I would definatly not want it to be my first large project.
If you decide to do it definatly post up build info and stuff,I'd love to see one if there isn't one already.
I like a more functional ride,if I had that I sure wouldn't be driving it much. If I did I would hate to take advantage of the torque.
The entire truck would need stripped and reengineered probably to do it right and actually utilize the power.
Sound's like fun,now I want someone to do it.

I don't know jack about dropping trucks, but im curious as to how it will be possible to lower a 4WD with a heavy 572 up front? more so how to make it adjustable so you can raise and lower that heavy pig?

[383 silverado]

I don't know jack about dropping trucks, but im curious as to how it will be possible to lower a 4WD with a heavy 572 up front? more so how to make it adjustable so you can raise and lower that heavy pig?

X2

i do know that you can use airbags to lower and lift cars or trucks. after all semi's use them. what i don't know is how reliable they would be lifting the extra weight of big block.

[DefEddie]

Anything can be done,but i'm thinking it would take at least some custom header's,custom radiator,best way would be to strip the truck completely and build a custom frame.

Not sure what you mean by how do you lower it with a HEAVY 572 in it? If I were doing the 572 only then I would simply upgrade the torsion bar's to a heavier 2500 bar and use belltech key's.
I think they mount the bags on the top of the upper control arm to a custom plate on the frame horn to retain 4x4.
There are some pic's on here of some guy's that have done it and retained the 4x4.
With the 572 I would say(custom frame!) maybe mount some shockwave's forward or rearward of the control arm's,kinda sidesaddle sorta.
That would leave space behind in the fenderwells(say goodbye to cover's) for the 572 and of course obligatory big bling wheel's.
The would have to be far inboard though to clear the wheel's,might even be easier to change the mount to the lower control arm.
I don't know,i'm just throwing that out.Suspension is NOT my strong point,but it's not impossible to simplify usually.
I'm going to just attempt some AFCO coilover's custom mounted similar to where my shock's are.
Airbags won't have a problem with the engine,it would be almost a non-issue except where handling came into play. With a 572 retaining the 4x4 with some mod's for AWD would be the best bet.
I'm not using near as much motor,but counting on the transfer case to solve my traction issue's.

[91_bowtie]

Why would you try to make a tahoe fast? Why don't you just build a lighter car, so you're not wasting so much money? :LOL: :LOL:

[97'hoe350]

well looks like i got a good project ahead of me. :) thanks for the info guys.

[DefEddie]

Why would you make a nova fast? or a camaro?
If it's simply because of the weight then you are a career racer I guess,or simply want to be as fast as possible.
It's a personal choice thing,like why the hell would someone put 30" rim's on anything? No real point,but it's a personal choice.
I just really like OBS truck's,and i've gotten partial to yukon's.
I have 2,and one of them weigh's around 4k right now I think.I'll get specific number's this week hopefully as I need to weigh it anyway.
My 4dr was fun simply because I had a goal to shut up my buddy with a slightly modded LT1 camaro who laughed at my yukon.
I didn't beat him,but I came within .2 of it and while it didn't shut him up it toned him down.
And that was with 200k on the clock and 20's,2 12's in the back.
http://www.youtube.com/watch?v=t3NGcBg_V7M

It'll never smoke that camaro,and he could spend a couple hundred bucks and a few hour's in the shop and put me out of his reach without doing alot of work.
But it's fun,and thats the reason I do it.

[98GreenMachine]

Why would you make a nova fast? or a camaro?
If it's simply because of the weight then you are a career racer I guess,or simply want to be as fast as possible.
It's a personal choice thing,like why the hell would someone put 30" rim's on anything? No real point,but it's a personal choice.
I just really like OBS truck's,and i've gotten partial to yukon's.
I have 2,and one of them weigh's around 4k right now I think.I'll get specific number's this week hopefully as I need to weigh it anyway.
My 4dr was fun simply because I had a goal to shut up my buddy with a slightly modded LT1 camaro who laughed at my yukon.
I didn't beat him,but I came within .2 of it and while it didn't shut him up it toned him down.
And that was with 200k on the clock and 20's,2 12's in the back.
http://www.youtube.com/watch?v=t3NGcBg_V7M

It'll never smoke that camaro,and he could spend a couple hundred bucks and a few hour's in the shop and put me out of his reach without doing alot of work.
But it's fun,and thats the reason I do it.

that was a bit of sarcasm on 91_bowtie's part, check out his sig..

[91_bowtie]

that was a bit of sarcasm on 91_bowtie's part, check out his sig..

ehh.. it's just a tahoe with big rims :LOL:

actually, they're gone in favor of these...


Here's a vid of the initial startup with the new motor. The smoke is just all the oil burning out of the pipes from when the old motor blew up.


It runs ok for weighing 5800lbs.

[98GreenMachine]

ehh.. it's just a tahoe with big rims :LOL:

actually, they're gone in favor of these...


Here's a vid of the initial startup with the new motor. The smoke is just all the oil burning out of the pipes from when the old motor blew up.


It runs ok for weighing 5800lbs.

I forget, did you S/C that one or no?

[91_bowtie]

I forget, did you S/C that one or no?

yup... I kept the whipple.

It felt much torquier than the old motor, and I haven't had it past 40% throttle according to the logs. I have a date with a z06, the day I get it back. :LOL:

[DefEddie]

Hey,you ever heard of a Porkchop?
Ran across it on the net,look's like it slides in place of the torsion bar's for bag's.
Don't think it would fit with a 572 but..
A 572 and 502 block are the same size right?
There is a guy on Pac that has a 502 tahoe.
These day's of high gas price's i'm sticking with my small block and going F.I. instead.
Hey 91,know much about turbo's?

[91_bowtie]

If gas mileage is even a small concern, you're going down the wrong path. I got 7mpg on my first tank with this setup.

I know a little. In a heavy truck, that's a daily driver, I'd use a twin screw or roots blower. the off idle torque is tough to beat.

[97'hoe350]

so there is a differance between the power provided by the two blowers? what are the advantages and disadvantages?

[98GreenMachine]

so there is a differance between the power provided by the two blowers? what are the advantages and disadvantages?

what two types are you comparing?

[TigerEyz3]

My guess is he's talking about TURBOcharger vs SUPERcharger (inferred from his initial post where he referenced a twin turbo).

Quick and dirty differences btween the two:

• Superchargers run off the motor (instantaneous power at all rpms)
• Turbochargers are exhaust driven (higher rpms generate power)

[98GreenMachine]

My guess is he's talking about TURBOcharger vs SUPERcharger (inferred from his initial post where he referenced a twin turbo).

Quick and dirty differences btween the two:

• Superchargers run off the motor (instantaneous power at all rpms)
• Turbochargers are exhaust driven (higher rpms generate power)

thats sorta right:

superchargers, more specifically roots- and screw-types, produce power at all rpms. These are much better for low end, off the line, power. This is due to them being positive displacement pumps.

Centrifugal superchargers are more like a turbo, they directly rely on high rpms to produce power. Just like a turbo has to spool up to produce boost, a centrifugal has to spin fast to produce boost. This is why they make their power on the top end of the rpm band.

[DefEddie]

There's alot more difference's between turbo/supercharger's,but those are good point's.
A supercharger's power is always there,a turbos power will come in under load when the cylinder's are the most effiecent and exhaust volume and velocity rise's.
A turbo will usually not come in fully till at least 3k though it's totally dependent on alot of factor's including exhaust,cam,valve and more differnce's.
I don't have much experience with them really,and mainly in diesel application's. I'm trying to build my small block for low rpm torque(2k-3500rpm) with a torque peak around 5k and hp peak around 6-6500.
Might not work out that way,but i've got a good basic idea in mind.Every part so far purchased and parts to be purchased have had careful consideration of CFM/flow ratings vs cylinder volume and theoretical effiecency.
I'm trying to factor everything in so I know exactly how much air this thing is pushing at any given RPM or pressure.
Tuning them is where the major difference come's in.
A supercharger power is basically constant as it's not dependant on load,so its alot simpler to tune for.
A turbocharger's power is more linear,and is primarily dependant on engine load.
Kinda like the more you make it work,the harder it work's.
As opposed to a supercharger that has one constant level.
I'm by no mean's an expert on anything,but that's my take as I understand it.
A big block tahoe would be awesome,but like stated would be a weekend vehicle simply because it's not feasible.
Being fuel injected would help quite a bit though,cause you can optimize for fuel effiecency.
Also you can a weak spark map during the week,and on friday fill it up with an Avgas/101 mix,reprogram the ecm and head to the track.
I did that for month's with my yukon,changing the timing maps back and forth every weekend at the track.

[97'hoe350]

dude i know wat the differance between a turbo and a super is. i just wondered about the skrew and the centrifugal. but thanks for the info. i think im gonna leave the 572 project to (much) later in life. lol. if i keep the stock 350 in it would it be easier to lay frame while keepin the 4x4. (on 22s mind u) i understand that it may be the problem of the 4x4 working, but it is sooo much easier to get up the mountian with the 4wd. im a skier so i am always goin up those slippery mountain roads. thanks again

350.

[98GreenMachine]

dude i know wat the differance between a turbo and a super is. i just wondered about the skrew and the centrifugal. but thanks for the info. i think im gonna leave the 572 project to (much) later in life. lol. if i keep the stock 350 in it would it be easier to lay frame while keepin the 4x4. (on 22s mind u) i understand that it may be the problem of the 4x4 working, but it is sooo much easier to get up the mountian with the 4wd. im a skier so i am always goin up those slippery mountain roads. thanks again

350.

So im curious what made you change your mind suddenly? Granted the project seemed doomed before it was even started, im still curious what finally made you decide to call it quits..