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Welcome to the 3500HD.com forum created October 2009

Author Topic: 1998 3500HD Crew Cab pickup and.......  (Read 22436 times)

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #30 on: April 21, 2013, 10:48:16 AM »
225-70's on steel

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #31 on: April 21, 2013, 10:57:57 AM »
Installed the adapter

245-70's on Alcoa's mounted up


Improvement?

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #32 on: April 21, 2013, 11:04:28 AM »
Nice!

Did you stick with the same 5/8" stud size on the adapters?  Also, did they design the holes large enough to get the lug nuts on the original studs without a fight?  Can't imagine torquing down to HD spec using a thinwall socket.

You must have scored a screamin' deal on that engine; apparently freshly built and no history info?  I guess that's not all that surprising for an engine like that, not like you were buying a full race big block or anything.  It should make a very nice engine for your project.  Keep us updated!

You consider a cowl hood to help clear the engine?  I'm not normally a fan of them but when they serve a purpose then I'm all for it.

Richard

The Adapters came with a lugnut that is a little smaller than the factory steel wheel lug nuts.  They were still 5/8" studs tho.  The went on just fine and torqued to 150lbs.  

Your right.  it was a super super deal on the Detroit.  It was at a gas company auction.  I do not know what it was out of, or what it was intended for.  I do know where its going to be tho  :)

And I've got a 4'' Goodmark steel hood in the box sitting in the basement.  I purchased it a few months back.  Hopefully it'll be bolted on soon hoping to get this thing done before fall.



Will look good once the center caps are on
« Last Edit: April 21, 2013, 11:16:00 AM by KingNothing »

KODIAK

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #33 on: April 21, 2013, 11:29:35 AM »
Where did you get the spacers ? & you use them so the 245 wont rub with a load ?

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #34 on: April 21, 2013, 11:38:21 AM »
The 3'' wheel spacer is mounted behind both wheels to move the set of wheels out to the end of the dually flare.  Not the pictures with the steel wheels how far back the tires sit. 

There was plenty of room between the tires and the inside of the bed to run them this way, however It didn't look good at all.  The 3'' spacer brought the tires out to what looks like a factory width. 

Also I had the adapters custom made at a place in Arizona.  I don't have there info right here with me, but can get it.  I ordered them on 2-11-13 and just received them 4-19-13.  They took a little time, but I have no complaints

someotherguy

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #35 on: April 21, 2013, 11:59:48 AM »
Looks like just the right amount of spacer for the dually conversion; nice job.  I can't remember if you ended up with 6 Alcoas so that you could run 4 across the back?  The amount of hub flange on your spacer looks like that was your intent, and would definitely be a plus in terms of rotational mass & unsprung weight - about another 100~120 lbs in weight savings to get rid of the inner steels.

Might wanna squish em down a little more; lug torque spec for the HD's is 175.  I'm not anti-spacer at all, I think they're 100% fine if quality made and torqued properly, also remember due to the aluminum being softer than steel you will want to re-torque them regularly until you are confident they are not loosening up.

Richard
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #36 on: April 21, 2013, 01:52:09 PM »
Im running inner steel wheels right now.  I only managed to pickup 4 Alcoa's.  There should be enuff hub flange to pilot 2 Alcoa's on the rear. 

Ill check into that.  I torqued them to 150ft lbs because that's what my flat face 2 piece lugnuts have stamped on them (the ones for the Alcoa wheels).  I mainly wanted to bolt everything up and see how they fit and that everything lined up nice.  Im happy with them.  I think im gonna have to find some 245 rubber for the front axle tho, It would really make it look better. 

I have no problem with bolt on adapters, if I coulda swapped out the rear for a wider one I probably would have.  I don't for see any problems tho.

I guess I better start getting that Detroit installed.

KODIAK

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #37 on: April 21, 2013, 07:41:32 PM »
How much gap do you have in between your 245's with the spacers ? & The Alcoa's any wider than steel ? I thought that the 245's required a wider rim

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #38 on: April 21, 2013, 07:55:02 PM »
How much gap do you have in between your 245's with the spacers ? & The Alcoa's any wider than steel ? I thought that the 245's required a wider rim

There is just enuff room for me to put my fingers between the duals.  the spacers are irrelevant because they do not change how far apart the tires are.  I think they recommend a wider wheel for a 245, but they look good on there.

Also they are the same width as the steel wheels (to my knowledge)


245's on the back
225's on the front

I really like the look of the 245's
« Last Edit: April 21, 2013, 08:00:54 PM by KingNothing »

someotherguy

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #39 on: April 21, 2013, 08:31:16 PM »
The 245's are spec'd for a 6.75" rim instead of the 6" that comes on the HD's (Alcoas are the same width as the steel), but I ran them on my HD as well.  Different tire brands/types may vary in how close they come to rubbing; also will depend on how much you air them up.  I ran the Goodyear G647-RSS's in load range G, at around 80-90 psi, no rubbing.  Tight gap, but no rubbing.

This is about the best pic I could find that shows it; you can see there's enough gap that the wheels mating in the middle are just peeking through:



Richard
« Last Edit: April 21, 2013, 08:35:02 PM by someotherguy »
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

KODIAK

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #40 on: April 21, 2013, 09:06:32 PM »
Okay thanks  I haul heavy loads & like the look of the  245s  but I think they might rub with the HD loaded But not to sure

KingNothing

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #41 on: April 22, 2013, 06:32:47 AM »
225's in the first pic

245's in the send pic

KODIAK

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #42 on: April 22, 2013, 09:44:04 PM »
Looks good Do you no where to get the rims that are 6.75 wide  insteed of 6.00 like all the HD are    2 bad GM did not have tire size & rim options

someotherguy

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #43 on: April 22, 2013, 09:56:37 PM »
Looks good Do you no where to get the rims that are 6.75 wide  insteed of 6.00 like all the HD are    2 bad GM did not have tire size & rim options
Rickson Truck, $261/ea for steel 19.5x6.75 10 lug; about $400/ea for aluminum.

Richard
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

KODIAK

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Re: 1998 3500HD Crew Cab pickup and.......
« Reply #44 on: April 22, 2013, 10:01:01 PM »
Thank you & have you seen any HD'S with them on ?

 


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