Jump to content

2020 High Country 6.2L Whipple Supercharger Build

AEmedic

By AEmedic
in Modifications, Wheels & Tires

 Share

Recommended Posts

AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted

I picked it up about an hour ago.  It is very stealthy, you don't hear the SC at all!  The weather is really ugly right now so I don't have much else to share, picture or video wise.  There are no drivability issues whatsoever, under normal driving you wouldn't even know its there. 

The tech went back and was able to install the Whipple belt on it.  His guess is that Whipple made the belt so tight that it has more room for adjustment after it stretches.  He basically had to loosen the adjustable pulley so that it was able to wobble at an angle and allow the belt to start.  

I will share more when I can.

  • Like 1
  • Replies 54
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

AEmedic
AEmedic
darkhorse220
darkhorse220

Ya'll worry too much. A little annoying.    I'd deny my warranty if i was GM. I boosted intake pressure by 8lbs. Unlocked an ecm that was specifically hard to crack, and retuned parameters s

darkhorse220
darkhorse220

Havent heard anyone mention a cold air intake and a supercharger together. I installed the GM performance intake. I liked the rotofab and the afe, but with how the intake tube and the maf is mounted,

Posted Images

bigdog2005 Enthusiast

bigdog2005

Posted
Posted

Following. Looking at doing the 3.0 Whipple on mine. My Chevy dealer has a performance shop as well and they said the only way they would do it safely and warranty the motor is also replace the pistons with forged and redo the heads springs, lifters and pushrods. 

  • Like 1
AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted
1 minute ago, bigdog2005 said:

Following. Looking at doing the 3.0 Whipple on mine. My Chevy dealer has a performance shop as well and they said the only way they would do it safely and warranty the motor is also replace the pistons with forged and redo the heads springs, lifters and pushrods. 

That seems a bit excessive but it might be good in the long run, depending on what your ultimate goals are.

 

  • Like 1
bigdog2005 Enthusiast

bigdog2005

Posted
Posted
Just now, AEmedic said:

That seems a bit excessive but it might be good in the long run, depending on what your ultimate goals are.

 

They said that the pistons are cast and proned to failure on these new 6.2s in our trucks when boosted. The lifters, springs and rods have been proned to failure in stock form and added HP and pressures only increase the chances.

They actually warranty the motor for 36k miles. The end result according to them after the dyno tuning would be 575-600 rwh.

  • Like 1
AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted
31 minutes ago, bigdog2005 said:

They said that the pistons are cast and proned to failure on these new 6.2s in our trucks when boosted. The lifters, springs and rods have been proned to failure in stock form and added HP and pressures only increase the chances.

They actually warranty the motor for 36k miles. The end result according to them after the dyno tuning would be 575-600 rwh.

You are the first one I have seen post that "the 6.2L lifters, springs and rods have been prone to failure" on the T1 6.2L...

bigdog2005 Enthusiast

bigdog2005

Posted
Posted
33 minutes ago, AEmedic said:

You are the first one I have seen post that "the 6.2L lifters, springs and rods have been prone to failure" on the T1 6.2L...

I have read a few articles about valve spring failure and lifter collapse, but I'm certain that can happen at any point. I have had my RST over a year now with zero issues. I figure they dyno them to 575-600 wheeled hp is the reason for the upgrades. From the sounds of it, I would be okay with the canned tune.

  • Like 1
lapoolboy Senior Enthusiast

lapoolboy

Posted
Posted
1 hour ago, bigdog2005 said:

They said that the pistons are cast and proned to failure on these new 6.2s in our trucks when boosted. The lifters, springs and rods have been proned to failure in stock form and added HP and pressures only increase the chances.

Yep.  Gotta pay to play.

  • Like 1
darkhorse220 Enthusiast

darkhorse220

Posted
Posted
17 hours ago, bigdog2005 said:

Following. Looking at doing the 3.0 Whipple on mine. My Chevy dealer has a performance shop as well and they said the only way they would do it safely and warranty the motor is also replace the pistons with forged and redo the heads springs, lifters and pushrods. 

I agree that it would eliminate some weak points when adding boost. Worst case if you were to leave it stock is that you end doing everything they mentioned later. Im in the 2nd camp. If i end up tearing down for a broken valve spring, ill rebuild it back stronger.

 

As a reference, hennessey is boosting silverados with full warranty. They add "crankcase ventilation" i.e. catch can as well as hardened push rods. 

  • Like 3
kodiakdenali Enthusiast

kodiakdenali

Posted
Posted

I had my springs replaced with a dual spring setup just for peace of mind. Mine was built in the middle of the valve spring issue.

The 3.0 whipple on a 6.2 is going to make high 400's to low 500's whp, if they are making 600whp, they are doing way more than just the blower, or putting a much smaller pulley on it. Its definitely not the whipple kit as is.

  • Like 3
AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted

I will be doing away with the DoD in the near future and that will be the time to do a few upgrades...

  • Like 1
  • 2 weeks later...
AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted

No huge news, but the truck is great and much faster, at least by my calibrated seat-of-the-pants evaluation.  The only negative I have is that, I’d say it is a bit prone to surging early in the power band.

  • Like 2
darkhorse220 Enthusiast

darkhorse220

Posted
Posted
13 hours ago, AEmedic said:

No huge news, but the truck is great and much faster, at least by my calibrated seat-of-the-pants evaluation.  The only negative I have is that, I’d say it is a bit prone to surging early in the power band.

I agree with the surging. How was the transmission been for you? Mine feels like it can get confused if it wants to drop a gear or not. Sometimes it does, sometimes it hesitates. Some of the gear changes seem a bit harsh too. The t93 isnt tuneable, so ill live with it. I heard they do some amount of learning, so i considered looking into a reset on it.

  • Like 1
AEmedic Enthusiast

AEmedic

Posted
  • Author
Posted
10 minutes ago, darkhorse220 said:

I agree with the surging. How was the transmission been for you? Mine feels like it can get confused if it wants to drop a gear or not. Sometimes it does, sometimes it hesitates. Some of the gear changes seem a bit harsh too. The t93 isnt tuneable, so ill live with it. I heard they do some amount of learning, so i considered looking into a reset on it.

I noticed the trans issue even before the install.  If you are hard on and off the throttle, it seems to think about the shifts more than make them, sometimes.

  • Like 1
SierraKid Enthusiast

SierraKid

Posted
Posted

With that supercharger I am almost certain that your powertrain warranty will be 100% voided

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Progress... sort of.   Intake is disassembled, spider is out, fuel lines removed. Used a torch on the stripped screw with the lower intake off, much easier when I've got the intake sitting on my workbench, I made it talk. Walked right out with a pair of vice grips once it was nice and toasty hot.   New parts are piling up on my service cart waiting to be installed. Distributor, temperature sensor, new gaskets, fuel line kit, themostat, water neck.   My new pickle is I don't want to spend $600 on a replacement spider. I'm not sure IT is bad. I'm probably splitting hairs. Or it's $300 to send mine away and another 3 weeks of the truck just sitting. I have half a mind to assemble everything with the old spider to see if I can get away with just replacing the fuel pressure regulator to be safe. The obvious issue was the gushing high pressure fuel line which will be replaced. Getting to the spider really isn't that hard, and now I know what I'm doing , swapping it would be a breeze should it absolutely need one. Stupid, or smart?   The part that gives me pause is replacing the distributor. Well, it's already out. And I didn't mark it, whoopsie! Engine was at TDC when I removed it, I know that, so upon correct reinstall the metal tip on the rotor should point to the TDC mark on the distributor because that's where it was pointing on the old distributor. Worst case I'm a tooth off and have to re-stab it.   But then, what? I assume the truck will start. It doesn't appear the timing can be set. Here's the problem: These distributors can't be rotated but a degree or two, by design. What I read is Cam ****** needs to be -2 to +2 degrees, ideally at 0 (and checked/set above 1000 rpm). There should be enough wiggle to get that properly set, but checking the reported value is another potential issue. My Actron 9185 scanner says it supports enhanced GM PIDs and Cam ****** is one of them but it's unclear that I'll be able to correctly see it over OBD 1.5. I can see why people end up junking these things with life left in them. They're an absolute nightmare with tweener-year diagnostics/electronics and unobtanium parts.   Fingers crossed it starts and idles nicely. There can be hope, right? I'ma buy a lottery ticket the same day just in case.   Next steps..DO IT. I have not installed an intake before so I've been reading and watching a lot. Some say NO RTV except on china walls, some say DO RTV on water ports but not fuel/air intake. 1/4 or 3/8 bead on China walls? I think my strategy will be, obviously, RTV china walls with overlap on the gasket corners. Chapstick-style RTV the water ports. Leave intake ports dry. The only set of intake gaskets I could find locally are Edelbrock performance gaskets (uh...for an asthmatic 190hp V6? LOL) so we'll see how they do.   #NoToolLeftBehind. It took an hour, but my recovery mission for my deep 10mm socket was successful. It had rolled down the bellhousing and wedged itself between what I think are the fuel lines? I couldn't see it at all, but with a junk antenna I had laying around, I blindly went poking/sweeping for it, heard it clink, raised the truck, and caught a sliver glimpse of chrome with a flashlight way up there in Narnia. I had pushed it farther along the lines holding it captive, but within access of severely improvised tools, poking and cursing at it to finally knock it free to where I could get a fingertip on it to bring it home.    Not much to see.      
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Thats crazy considering im right next door (Indiana)
    • Black02Silverado
      New Retail & Commercial Promo

      By Black02Silverado · Posted

      For a limited time, retail and commercial accounts receive an AMSOIL Vinyl Tool Tray with their order of $500 or more when they use code TRAY726 at checkout. The promotion runs through July 21, 2026.   Order at https://syntheticadvantage.com   Want to use AMSOIL in your business or sell at your store, apply here.  https://www.amsoil.com/business-opportunities/?zo=521390  
    • KARNUT
      2027 GMC Sierra: Official Discussion

      By KARNUT · Posted

      It wouldn’t have happened if the government hadn’t mandated outrageous fuel mileage standards. It does very little for the consumer. It adds cost. Back during Covid there was a chip shortage. They gave a rebate for your truck if it didn’t have the chip to turn on cylinder deactivation. It was 50$ because at best you may see 1/2 a mile increase per gallon. Splitting hairs each fuel mileage trick wasn’t mandated. The government doesn’t do the engineering work and say use this until it’s already in use and they like it. The fuel mileage was mandated. And those add ons the results. There’s a mandate and they are the results.
    • newdude
      2027 GMC Sierra: Official Discussion

      By newdude · Posted

      It was never mandated.  Ever.    Automakers were incentivized to install it by getting CAFE credits to help with their vehicle fleet fuel economy scores.  They were being handed money/CAFE credits to install it.  Which is NOT a mandate.       The current admin removed the incentives that were behind them installing it.       

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...