I have a 6.0 LQ9 engine and 410 gears and a HD 4L60E trans, running about 325 hp and about 360 torque I purchased a Magna Charger for it I would like to know whit psi to set it to get the most out of the Magna Charger... PS. some one told me to set it at 6 is that right or can I go more I had it installed for power and a weekend driver...also I would like to know how much HP. would I be looking at...Thanks.

 

Welcome to PT.net

You don't set psi with the magnacharger, you swap to a smaller pulley to spin the blower faster if you want to up the boost.
Your stock Radix will make about 5-6lbs, I suggest you start with that and go from there. Read up on this forum, must be 100 of us running the Radix, some stock and some at max efficiency.

BTW I moved this to the FI section so you will get some better response! PTL!!

 

Welcome and like above start with it at the stock calibration and boost. Then work your way up as you add more mods.

 

The LQ4s can handle a little more boost than 6 psi with the right supporting mods and the correct tuning. I would take trever1t's and 2005SSR6Speed's words as great advise for a noob and start with the install and stock tune just to get it on the road and start reading. I found the search button answered about 85% of my questions and there are a lot of resources to answer the not so common issues.

 

Words of advice....Install the stock kit and get it running before you start adding more parts. I have the kit on the floor and since its not installed yet, I have added much more to the pile w/o even knowing what a stock radix feels like ... the poor check book hates me now. Also I went ahead a bought a FTL lvl 5 4l65e tranny... the stock 4l60's can't take the weight of the truck and low end of the radix. It's not a matter of if.. it's a matter of when you kill the stock tranny. The FLT costs about $3500, but you can get cheaper from other shops.. but still count on $2000 for a tranny. Just keep that in mind for a budget

I've also heard that the lq4's can take 7-7.5 psi and live for a while with a good tune. That is my goal atleast to keep it in that range

What vehicle do you have that motor in.. is it a yukon denali or a sierra denali? Those power ratings match those trucks

 

hey thanks guys for all the info, I have a 1999 silverado shortbed the engine came out of a 2004 h2 hummer, I should have planty of power. Thanks...

 

That motor all stock can take a beating. Guys on here have done plenty without spending a bunch on aftermarket parts. I've actually gone back to stock pan, and shud have stayed with stock rockers, rods and crank. OEM parts are really very well made. R/

 

Hi 25237, here is my 2 cents, dont know that much about Chargers, but what these Guys are saying is good advice, they should know most of them have a Charger. I will have mines in about 10 days, its beening tested right now. i have a 2008 4.8 Silverado. Cant wait to get it home.

 

FLT's Level 5 4L65E is $2550 it can be more if you purchase the billet shafts. You can find a cheaper transmission for your truck but you wont find a better one than Finish Line Transmission.