Hello. New to the forum. Have been searching for info on putting a turbo on my 2010 Silverado 6.2. I've found a lot of information but am having trouble making sense of it all and was hoping you all could help me out. My truck is daily driven, 62k miles, bone stock and I'm looking to make around 500-550 HP. My questions are:

What size turbo should I consider? 76mm, 80mm? I'm not looking to make huge power and want something that is relatively quick spooling for everyday street driving. I would also like to take the truck to the local strip to see what it can do.

Will the stock flex fuel system support the power I'm looking to make or will I need injectors and a fuel pump? (I'm considering running E85 with the turbo)

I'm sure these questions have already been asked and answered on this forum but I just can't quite find the information.

Any help would be greatly appreciated!

 

500-550whp should be no problem for a turbo setup on that truck! I would go with a 76/75 turbo, or somewhere in that range. Your fuel pump will be good for that amount of power, on pump gas, but you're definately going to need injectors... I would go with some 72lb injectors or even bigger if you wanna run E85, some 80lb injectors should get the job done! The stock flex fuel pump may to weak for straight E85 for that kind of power, that's just something you'll have to test out. That's gonna be a fun build! You can make the power your looking for on 10 pounds of boost... Maybe less

 

Thanks for the info, JordanH. I'm thinking I want to be have the option to run E85 in the future so I'll probably opt for the 80lb injectors. It looks like the FAST injectors are popular. I was looking at Byrdman's build and he had a setup that interested me. I think he was running a BW 75/83 making 546 HP at 9 psi. From what I've read, I need to get a meth kit to help keeps temp down. Will that be necessary for 9-10 psi?

 

You can see those numbers on 8-9psi for sure! A meth kit would help you out a bunch, especially on pump gas! It'll keep your intake air temps down, clean your motor, and turn your pump gas into high octane jet fuel! You don't have to run meth, but it has its advantages... Does it get pretty hot where your at?

 

no need to run e85 to only make 5 or 600 rwhp, save the e85 **** for 4 digits

the flexfuel pump will support 550 range on straight 93

i just finished up a twin build on a 6.2 aka ls3 and on 16psi it made 806rwhp [mustang dyno] on only 13* timing on straight 93.....example you dont need the e85 for the power you want to make

as for power that all depends on what you want to spend money wise on a turbo....ive built 3 twin setups using on3s with great results...again this comes down to what your wallet

stock flexfuel injectors for a 6.2 should support 500 rwhp on 93 since they are 49lb injectors where as the 5.3 FF injectors are 39s

 

Was this 6.2 aka ls3 a stock motor? If so I'm about to go trade the Tahoe in for a Silverado with the 6.2!!! Save me a bunch of time and money!

 

6.2 is a breathing machine.
Single kits Dyno 600 on stock set ups.
We did have a customer in FL Dyno 600 stock fuel system. Lots of meth. I don't recommend that.
Get larger injectors for safety and future growth.

 

only things changed was jfr camshaft, prc 650 springs, 7.4 pushrods, arp head studs, ls9 gaskets and fic 1000cc injectors.....turbo setup built by me and tuned by me

pulled to 7000 without dropping power

 

Thanks for all the info, guys! Jordan, I'm in Denver so it doesn't get THAT hot during the summer, but we do see the mid 90s and even some 100* days. I'm planning on running a meth kit so those temps shouldn't be a problem, correct?

George, it sounds like you are quite familiar with boosted 6.2s. You talk about running straight 93 and making good power. I've only got 91 at the fuel stations around me; is that going to cause any problems? Also, I've looked into the on3 turbos but am unsure about their reliability. Do you have any first-hand experience with the on3 turbos in regards to longevity/reliability?

I haven't decided what size turbo I'm looking for yet, either. I see a lot of guys running a 76mm but I also see quite a few people running BW S475 and S480 turbos. How do these turbos compare to the 76mm on3 unit?

Again, thanks for the info, guys.

 

ive built 3 setups using on3 7665s, great turbos for the buck but some ppl have too much pride to run them...that ls3 has them on it


as for 91 octane you would be limited to timing but depending on setup that may not be such a bad thing....that ls3 made 744 on 8*