Magnuson Supercharger, Valve Train and other supporting mods. 2007-2013, 5.3L Chevy Tahoe

[12BlackTahoe]

time to call Yukon gear & axle, from what I have read they are the place to go

 

[Chrismnj]

might be a best bet.

 

[kbuskill]

4:10 will feel/accelerate faster...

3:08 Will be sluggish off the line but will actually go faster top speed. All depends on what your trying to accomplish.

 

[Chrismnj]

4:10 will feel/accelerate faster...

3:08 Will be sluggish off the line but will actually go faster top speed. All depends on what your trying to accomplish.

rather be faster of the line, plus benefits for towing

 

[kbuskill]

rather be faster of the line, plus benefits for towing

I figured as much but just wanting to clarify.

 

[67RS427]

Looks just like my order from BTR less the cam. What lifters are you running. I'm debating pulling my heads and swapping lifters. I debated swapping LS7 lifters as a few people had problems with them so curious what u running.

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LS7 Lifters here... No problems that I know of and GM has literally millions of them out there with few failures in motors running 7k RPM and higher. Unless you're getting really crazy, no need for anything fancy. GM did a great job on the LS7 lifters. Good pushrod and a rocker with Trunion upgrade and you'll be good to go.

 

[Tonyrodz]

to my understanding I need to do front and rear?

Yes.

 

[mikeyss]

My 05 Tahoe has 4.10 gears and the 5.3 is tuned by blackbear. It definitely launches off the line, but after you hit 70mph, the engine starts to scream. It runs above 2600rpm at that speed with it's 4L60 and .69 overdrive.
My 09 Tahoe has 3.42 gears and the 6.2 is tuned by blackbear. The low 1st gear ratio in the 6L80 makes it launch like it has 4.10's, and at 70mph it's only running 1800rpm with 33" tires and it's .667 overdrive.
If you are wanting to change gears, I'd recommend 3.73 gears. 4.10 gears with your 6L80 is gonna make 1st gear WAY too low and most likely useless, IMO.

*Edit: 2600rpm with 4.10 gears and 4L60 is around 80mph.

 

[mikeyss]

https://spicerparts.com/calculators/transmission-ratio-rpm-calculator

 

[bottomline2000]

LS7 Lifters here... No problems that I know of and GM has literally millions of them out there with few failures in motors running 7k RPM and higher. Unless you're getting really crazy, no need for anything fancy. GM did a great job on the LS7 lifters. Good pushrod and a rocker with Trunion upgrade and you'll be good to go.

Thanks I already have the trunion upgrade and hardened pushrods. I chose not to do the lifters for fear of failure..,good to know and hopefully helps the OP..not trying to jack his thread..

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[thompsoj22]

rather be faster of the line, plus benefits for towing

4:10 is not needed for your mod's as sustained high rpm work your SC needlessly? stick with what you have currently and see how the vehicle drives/tows and you will possibly avoid an error in ratio. Your auto trans is where i would start spending any drivetrain dollars. You are building a cool "stealth sleeper", let it relax under normal driving and than twist the driveshafts like candy canes when you downshift.

 

[12BlackTahoe]

My 05 Tahoe has 4.10 gears and the 5.3 is tuned by blackbear. It definitely launches off the line, but after you hit 70mph, the engine starts to scream. It runs above 2600rpm at that speed with it's 4L60 and .69 overdrive.
My 09 Tahoe has 3.42 gears and the 6.2 is tuned by blackbear. The low 1st gear ratio in the 6L80 makes it launch like it has 4.10's, and at 70mph it's only running 1800rpm with 33" tires and it's .667 overdrive.
If you are wanting to change gears, I'd recommend 3.73 gears. 4.10 gears with your 6L80 is gonna make 1st gear WAY too low and most likely useless, IMO.

That makes sense, after doing some research and reading, 3.73 would be a better choice. But he did say it's not his DD, and it's off-road vehicle.

 

[12BlackTahoe]

4:10 is not needed for your mod's as sustained high rpm work your SC needlessly? stick with what you have currently and see how the vehicle drives/tows and you will possibly avoid an error in ratio. Your auto trans is where i would start spending any drivetrain dollars. You are building a cool "stealth sleeper", let it relax under normal driving and than twist the driveshafts like candy canes when you downshift.

well, after that camshaft and full exhaust, it will be everything but a sleeper. LOL

same cam.

 

[Chrismnj]

^^ it is a 6.2, but I have played that video like 4 times already.

 

[67RS427]

well, after that camshaft and full exhaust, it will be everything but a sleeper. LOL

same cam.

You should hear my cold start lmao... Most of my videos are before my 402" without my Stage 3 CAM and gutted Y pipe

 

[12BlackTahoe]

You should hear my cold start lmao... Most of my videos are before my 402" without my Stage 3 CAM and gutted Y pipe

But you have a bigger cam.

 

[12BlackTahoe]

Not to be a copy cat or hight jack this thread, like I have mention in my earlier post eventually be adding a blower and valve train upgrade same set up as yours, is there any way you could share your spec sheet for camshaft? and @67RS427 could i see yours? If you don't mind. Thank you guys in advance.
My tuner was asking if I can get them.

 

[Chrismnj]

Not to be a copy cat or hight jack this thread, like I have mention in my earlier post eventually be adding a blower and valve train upgrade same set up as yours, is there any way you could share your spec sheet for camshaft? and @67RS427 could i see yours? If you don't mind. Thank you guys in advance.
My tuner was asking if I can get them.

Since you said thank you in advance, guess I could share that info, don't think it's a secret, just happened that I have a picture on my phone, BlackBear was asking for the same. All that is like black magic to me.

 

[12BlackTahoe]

Since you said thank you in advance, guess I could share that info, don't think it's a secret, just happened that I have a picture on my phone, BlackBear was asking for the same. All that is like black magic to me.

View attachment 216680

Thank you! Who do I talk to when contacting BBP? I might go with them as well.

 

[Chrismnj]

Thank you! Who do I talk to when contacting BBP? I might go with them as well.

I think preferred method of contact is through email, and depends on a question adequate person will answer. Copy and past from BB website.

• [email protected] - General & Tune Sales Questions
• [email protected] - Performance Parts Sales
• [email protected] - Technical Tune & Vehicle Questions
• [email protected] - Dealership Opportunities