I’m starting to entertain the idea of having a tune preset of running strictly NA. Reason being is for daily driving and fuel conservation where it’s needed.

So, I thought it out like this. I’m thinking of locations that I could install a 3” exhaust cutout switch. The switch could be wired towards whatever I use to change tunes.

Since I’m supercharged(centrifugal specifically, roots wouldn’t work), something like this could work.

Pros:
Quieter, with no loud BOV
Could act as it’s own Valet
Save some fuel for cruising

Cons:
More things to break
Unknown if cutout can support 20+psi when closed
More tunes, more money
Finding space and placement of air intake filter for NA side.

Anyone else have an opinion on this? As much as I’d like to go full ***** out on high hp, the option of bringing it down a lot with a quieter ride would be nice. Maybe I’m just getting old.

 

Unless you can disconnect the supercharger drive I'm guessing there would be little benefit or possibly a loss in efficiency as you still have the losses of driving the supercharger without the benefit.

 

You want to install a cutout on the intake pipe? This will lower your VE and increase fuel IMO.
Installing one on the exhaust would do nothing

 

I agree with what everyone above has said ...

what you should look into is that legit electronic supercharger that Garret(the youtuber, not the turbo manufacturer) Cleetus McFarland tested out on a chevy cruise/sedan a little while back.

This would give you the best of both worlds ... NA driving and economy for daily'ing and a healthy amount of boost when you wanted boost. I think the electronic kit is around $4k if I remember right. I speculate this will be the way of the future for gasoline engines. You have FI when you want/need it to get up to speed(15% of the time?) and NA for economy/crusing(85% of the time?)... it runs off a battery and you only have X amount of blower time (like 8minutes or something) running it full before the battery needs to recharge.

You wouldnt have to mess with any belts, exhaust modifications, oil lines, coolant lines, you would have to wire it up and it's a 48volt supply and the boost would essentially be instant...like I said, I bet this takes over the small displacement turbo sedan/truck/eco-cruisers engine market in the next 5 to 10years.

 

Unfortunately, with a centrifugal supercharger unless you physically disconnect the blower you will always have that parasitic loss.

If you want to save fuel there is a few things you could do.
First pulley up, so you see less boost which will result in less parasitic loss.
Second thing you could do is, engage lean burn when you're cruising. This will take some amazing tuning, but it can be done. Watch this video series to understand more
BeallJk
That supercharger that Cletus used doesn't provide enough air for our high output engine. Very good in theory but in practice but would be cost ineffective, mise well go NO2.

 

I used to think he was a toolbag but I actually like what he's doing and I watch some of his earlier videos and I think he's a good guy!

You'd have to find something a little bigger ... point being, that charger concept has potential (if you ask me).

 

He's always been a little silly to me, but I've always loved his videos.

I 100% agree about the blower, I think his video may open to doors to bigger and better electrical blowers.

 

Yeah I figured I missed something, and there isn’t too much info out on clutched systems.

Honestly, the fuel economy isn’t a huge concern, more or less it’s the noise it produces. I guess in order to go that route the hard way, I could always have a smaller serpentine belt on hand. Replaced enough belts from shredding in the past to be able to change them out in a minute.

 

Not this again

 

I am thoroughly confused here.....

Tune? 3" exhaust cutout? Hold 20psi? Save fuel?

All while supercharged.

Ummm, help me out here... What is the relationship between all of this? Why would an exhaust cutout have ANYTHING to do with the FI side? It's not a turbo so bleeding off exhaust does NOTHING but help exhaust evacuation (or hurt it depending on where its located). And why or even HOW does it need to "hold 20psi"? "Holding 20psi" is an induction side requirement from a belt/pulley driven compressor, not exhaust...

Or am I just mixed up? Help?

 

Fabricating an exhaust cutout on the intake not exhaust. I’ll try drawing something up later today.

 

Where's the unsub button

 

OBVL

One big vacuum leak. 🤣

Exactly what is your opposition to a blow off valve based on? The sound?

 

This is a terrible idea/thread/etc. lol

 

Easier to use a positive displacement blower. Mercedes has used electronic clutches on them for years. Grab a Mercedes clutch, wire it in on a switched relay.

 

or just buy a prius!

 

I'm running a Tial Q bov, so it doesn't really have any way of muffling the sound. Driving a convertible, it can be obnoxiously loud driving around. Being supercharged, sounding like an airport just cruising gets old sometimes.

It sounds nice when I want it to, but when I just want to cruise around with the top down, it's pretty meaningless. Even running LTHs, the Motordyne TDX isn't even that loud which is nice.

Even the vette is quiet compared to the Z.

Thanks for your input.

I might have to look more into this, depending on how electronically complex it is.

I have one actually

 

Pretty simple. Just 2 wires, like an A/C clutch. The hardest part is going to be fitting the parts. You'll need a blower with the same shaft diameter or have a good machine shop.

 

The bigger problem lies on the pulley alignment.

 

Pulley alignment? Nah. Just start with a Stillen blower kit for a Z. You'd have to fab up a air/water intercooler because the Stillen kit doesn't come with one and makes minimal power because of that... Or, run meth injection.