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Author Topic: Topic: 2002 Suburban 2500 build thread, Part 4  (Read 6871 times)

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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #250 on: January 29, 2020, 12:07:12 PM »
Snapped a pic of it yesterday...Its still alive
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Offline Bigdave_185

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #251 on: January 29, 2020, 02:25:44 PM »
What happened to them stickers you were gung-ho about?


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Online JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #252 on: January 29, 2020, 06:22:26 PM »
Are those 35s?
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Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #253 on: January 29, 2020, 07:39:13 PM »
don, can you get a 3 dimension measurement of the fuel tank in the burb? i think the inside width is the 3+3 frame is right around 28”. plus with a large single piece drive shaft (4” or so..?) that puts me at a max workable width of <12”. not sure i’ll be able to find one that narrow.. but i’m going to shop around and see what i come up with hah

Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #254 on: January 29, 2020, 09:47:47 PM »
What happened to them stickers you were gung-ho about?


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Got em in and they were buggered up. Like stuck to the tape, worthless!
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #255 on: January 29, 2020, 09:48:19 PM »
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #256 on: January 29, 2020, 09:49:34 PM »
don, can you get a 3 dimension measurement of the fuel tank in the burb? i think the inside width is the 3+3 frame is right around 28”. plus with a large single piece drive shaft (4” or so..?) that puts me at a max workable width of <12”. not sure i’ll be able to find one that narrow.. but i’m going to shop around and see what i come up with hah
You want me to measure the size of the rear fuel tank in my 2002 2500 Burb?
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Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #257 on: January 30, 2020, 07:33:09 AM »
yessir. if at all possible.

Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #258 on: February 12, 2020, 09:58:32 AM »
OK, first, apologies for not getting the measurements, I forgot to do it...But I have excuses...and, yes, none of them matter...and I am a bad man...;-)

So the Supercharger was shipped this past Monday. Should arrive in a couple days. Nick reports he has most of the stuff for the conversion sitting on shelves.

To review the Burb will be upgraded with:

R&D LSA Supercharger System with ZL1 lid - Cathedral adapters - 12 ps
NGK BR7EF Plugs
Racetronix DIYDPK-SUV Kit (Fuel pumps)
Upgraded fuel lines DSX Flex Fuel Kit
Deatschwerks 17U-26-0095-8 - 95 Lb/Hr Injector
GM 3 Bar MAP Sensor
Intake Tube Components and Powder Coat
Supercharger cam
90mm throttle body
Custom speed density tune (Lose the MAF!)
Chassis dynamometer tune
Big smiley face behind the steering wheel

Now all this will bring me to the last thing I may need to change up
The truck's 4.88 gears are too tall with the 35" tires
So I may be thinking about a gear change to 4.56 or a swap to 37" tires or both...dunno yet

Target time to do the supercharger install is next week
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Online JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #259 on: February 12, 2020, 11:00:36 AM »
I sure like the 4.56 with 35s, hope I don't loose much with 37s, but you have those and like em too.
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Offline EL TATE

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #260 on: February 12, 2020, 11:40:00 AM »
I sure like the 4.56 with 35s, hope I don't loose much with 37s, but you have those and like em too.

What's the transmission again JR? You can enter gear ratio, tire size speed and trans ratio and even look up each speed's respective ratios in any transmission here: https://www.randysworldwide.com/calculators/transmission-ratio-rpm then you can KNOW what your power curve will look like w/ 37" rubber.
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Offline swbhobie16

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #261 on: February 12, 2020, 11:41:08 AM »
I sure like the 4.56 with 35s, hope I don't loose much with 37s, but you have those and like em too.

since i was ignored on tank size i feel ok DOT’ing this. you have 4.56 and 35s in the LBZ? i was hoping for 4.10 and 35-37s on the 3+3. think i’ll be too far out of range on the 6 speed allison?

i just think lots of modern ‘truck builders’ are running 35-37s on factory 3.73 gears..

Online JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #262 on: February 12, 2020, 12:25:37 PM »
When Tate and I ran it, 4.30s would be perfect with 35s. I have 4.56 now (ally 6 speed) and run just under 2000 rpm at 70 (gps verified)

Now saying that, I love the low end power but think cruzing RPM is a little high over 70 on my setup and think the 37s will help there without hurting low end much.
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #263 on: February 12, 2020, 07:17:20 PM »
I just did the RPM calc's

Thanks Tater

Current setup, 4.88's and 35" tires = 2460 @ 70 mph

Going to a 37" tire = 2327 RPM  @  70 mph

Changing to a 4.56 and keeping the 35" tire size = 2298 @ 70 mph

JR, you still have that 9.25 front diff with the 4.56's?
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Offline TexasRedNeck

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #264 on: February 14, 2020, 05:39:45 PM »
Looking at the pics I think it would look better on 37s


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Online JR

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #265 on: February 14, 2020, 08:44:01 PM »
Still have the gears, axle is gone. (easier to ship gears)
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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #266 on: February 15, 2020, 10:15:31 AM »
Looking at the pics I think it would look better on 37s


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Looks obviously aren't what I am after, but the 37" tire question is not off the table at this point. And one of the reasons happen to be those inexpensive Federal Couragia tires I purchased for my D-Max truck. Now with some miles on them they are still showing to be really great tires. How these folks sell them for $240 each and they handle better than the $400 tires is a mystery. I cannot give high marks to the BFG mud terrain tires, or the Toyo open country offerings as well. No tire I have had is any better than these Federals  and with the lower cost than another gear swap, the tire option, lowering my RPM into usable ranges is tempting.

I am going to talk to Nick about doing a 6L90 swap since that could get me to a .67 ratio in sixth. Currently I have a .75. The truck is stable at 70 which has me thinking, I may want to plan around a cruise speed between 70-75. With the blower huffing when necessary, I think I'd appreciate a 2150ish rpm cruise over the 2400 ish cruise I now have.

In any event, I won't make any decisions until after I see how the supercharged and tuned truck runs/handles.

Oh and apparently the supercharger is in, so the burb should be going in soon for the change up
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Offline Bigdave_185

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #267 on: February 15, 2020, 10:29:43 AM »
Did you ever hear anything back from the black bear company?   Anything after your last email to them about lack of customer service?


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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #268 on: February 15, 2020, 11:11:12 AM »
Did you ever hear anything back from the black bear company?   Anything after your last email to them about lack of customer service?


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Sure did,

They said that the tune was correct, I disagreed, and they said they were going to send another tune. I pointed out that it had been months, and they responded that they have a large customer base and lots of work. I pointed out that if they can't write tunes in a reasonable length of time, what good is the service. They think they are doing OK, I think their service is awful, and their tunes have many mistakes.

We agreed to disagree, and I said I would no longer be doing business with them...EOM
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Offline Bigdave_185

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #269 on: February 15, 2020, 11:33:48 AM »
I had wondered what the response would have been. Thank you.   



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Offline Flyin6

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Re: Topic: 2002 Suburban 2500 build thread, Part 4
« Reply #270 on: February 15, 2020, 11:40:13 AM »
I think they are probably good people. But with the programming staff being one deep, they have committed beyond capability. Justin should keep it small and focus on the one/one game where he can insure customers are satisfied before he departs the A.O.

With this mail order model, the system has to make a bunch of assumptions, there is poor interaction between the end user and Justin, and the time lag is untenable. I lost the use of my vehicle for a couple seasons because of this lack of responsiveness, and that is a huge fail in terms of customer support.

I wish him well in future endeavors.
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