I have been wanting to add boost to my engine for a long time but the transmission was the limiting factor being a 4L65E.
After finding out that these can finally be built to hold up to 1200rwhp reliably thanks to technology and engineering improvements and in house customisations from Performabuilt.
I will be looking at importing one of these most likely toward the end of the year.
I would like to hear folks opinion on whether a supercharger, single turbo, or twin turbo setup is best?
What would you choose and why?
Each has it's pros and con I guess.
I am aiming for around 800rwhp which will be easy to achieve as I already have an LS 408 stroker engine making over 600hp.
I know I will have to change camshafts again to match the boost of my choice.
I am probably looking at running around 15psi of boost.
I want it to be reliable so I don't want to run to push it too far.
Engine is an LS 408 with CNC LS3 heads.

 

Big single turbo if it'll fit, good on efficiency, free easy power, less parts to maintain. But why burn money on a 4l65e that will break?? Put a 4l80e in it and be done with it. Jake's stg 4 $4600 vs performabuilt $5000

 

I know the 4l80e can hold more power but performabuilts black edition 4l65e is preferable as it's a smaller unit and more efficient and holds 1000rwhp now.
Single turbo sounds good but what gives you a wider power range?
This or a twin turbo setup?

 

I like prochargers on bigger cubic inch motors.

 

Turbo... the only rational option... why deal with belt slip and all that other BS when you don’t have to... while being more efficient and everything.

 

Something like an F1a-94 should make 15 psi on a 408 with ease without belt slip issues. I have several friends with centri setups and no one has belt slip issues until they spin the blower beyond it’s recommended max rpm. At that point you are definitely better off going turbo. It all depends on personal goals.

 

First off what vehicle is this? I generally choose blower or turbo based on fitment and what I would have to give up. If you can fit a turbo setup I generally sway that way, otherwise prochargers have plenty of power and can be just as fast with less issues.

Wait what? Don't even think for a second there is a reliable 4L60 that can take 1200 rwhp, I don't care what somebody is selling you. People have a hard time making a reliable 4L80 at that power level.

 

The trans will live longer with a centrifugal than the torque curve of a turbo. Easier to hook up on the street as well. Really comes down to tradeoffs you're willing to live with. Turbo's are typically harder to package with more changes of melting stuff underhood due to proximity to other components. Blowers have to deal with belt slip and changes in pulley size to change the boost unless you do a wastegated setup on the cold side. Blower will accommodate a more rowdy cam and can reuse your N/A exhaust assuming its decent. Turbo you can recoup some money by selling that stuff and putting towards the turbo kit.

 

I asked myself the same question not too long ago Bort, as you know.

I weighed my options. And on an F Body car, the procharger blower just made "sense" for me.

Albeit, I've yet to get it all hooked up. The good news however, is that my procharger aster bracket showed up yesterday! Exciting.

 

That's the 1 mod I wish I did. Those aster brackets are totally worth it if you plan to run anything higher than 5-7 psi.

 

A lot of good information here.
What to do.....
I don't think I want a pro.charger because it's too noisy.
Supercharger is not efficient
Turbo is efficient but a pain to setup and then you have issues with heat etc.
I guess what I really want is for boost to come on strong about 2500rpm or so and hang on till 6500rpm

 

A properly sized turbo and good tuning will do that. Otherwise looked into a roots/twin screw style blower. Quiet at idle and more torque than you'll know what to do with. Still didnt see if this is in an F car or other platform.

 

I think you might be surprised Bort -
A D1X, not only is it easily capable of making your target/desired horsepower, but with the helical gearset (I believe it's called) they're pretty quiet. My friend with his 2010 SS and a super quiet magnaflow exhaust... you can really only hear the whine during idle/coasting.

They're pretty quiet. The F-series is where things get loud.

 

But it's not too late - you could still sell your J bracket for almost full price. There *is* a demand oout there - and put it towards your Aster ;-)

 

I sold the blower kit and the car lol. FInished rebuilding my LS6 and starting a turbo kit

 

Seems like its long term choice,, if I add a blower, I have a finite range
I can tweak boost and stay in the zone for the blower efficiency,
Turbos seem to have a wider range so if your plan changes, the
cost to change the boost method is slightly easier to take.

There are "bargain" turbo options,, less so for the supercharger.. So less budget flexibility..

Install wise The few I've worked on,, they were about even for difficulty.. (Not heavy custom setups.. )

 

Turbo are the same, they have island efficiency, rpm limits, and airflow limits. They are must easier to adjust boost levels compared with a blower though.

 

Lol...I have the D1x with magnaflow exhaust as well. The blower can be heard more at idle walking around the car, but driving all I hear is the blow off valve and exhaust.

Not many people like the prochargers these days. For me in a traction limited street car it’s perfect. Pulley it for the peak boost you want and tune it for max safe power...done in a weekend and on the road. Then control wheel spin with your foot no boost controllers or anything just drive it.

 

Pretty much word for word.

;-)

 

I have had them all and currently have two of them. Without a doubt Procharger for the set it and forget it. I run an A&A kit with the direct drive and have been on the same belt for 6-7 years now. Dead nuts reliable at over 700whp for years now. To me, that's hard to beat.