do you need to run premium gas with super charger or not?

actually no, its the other way around. skinnier tires mean less tire surface contacting road which translates into less friction and resistance on the drivetrain to turn them, so it takes much less torque to turn the tires and to maintain constant speed going up inclines so its going to require less engine strain and therefore less fuel consumption.

now if you are thinking of it only in terms of rpm vs speed then yes the rpms are higher for the same constant speed but with the reduced friction of the smaller tires you are "unloaded" so the ecm reduces the fuel injectors output since its not needed and you are not burning as much gas to maintain that speed. basically 90% of all your driving the engine will be in idle mode as far as the fuel consumption. this is why all the 5 lug trucks with the smaller tires average 2-3mpg better then the 6 lug trucks do with the exact same engines gearing and trannys, but you do lose out a little on the top end power with them.

no, I was referring to a low mileage 100k mile salvage yard engine, pretty much whatever fits the best with the least modification needed and it has around 250 hp or more stock without and turbo or SC added. maybe a 4.7 out of 4runner or tundra.

while neither option is cheap, im guessing something like that would cost about the same or maybe less then getting the complete SC package and what that would cost. this would be more attractive option since it would be less bothersome and could be used as-is stock and burn regular gas.

and to be clear, im not going to do an engine swap or SC because both are far too far beyond my budget to even think about but its nice to plan for "what if"

 

Nope.

 

why take the unnecessary risk? just run the minimum of 91 octane.

 

Yes

 

the question was what do you "need" to run since often they will say they recommend you do things "just because" while you can do fine without it, in this case, that isn't true, and the 91 octane is a must to run a SC

 

U can use a lighter to see how much gas is in a container in the dark if u no have flashlight...... But I wouldn't recommend it

 

using a lighter is just dumb, its better to drop a lit match in the can then watch it fall to see how full it is

 

Does the 1st gen TRD unit come with an intercooler?

 

Rolling friction has a very small impact on overall load felt by the truck. The reason larger tires tend to get worse gas mileage is because they have a much greater rotational inertia: they require more torque to turn. This factor is heavily shadowed by what you mentioned about rpm's though. The highest gas mileage will always be experienced when you can cover a longer distance using the same rpm. The engine speed is proportional to gas consumption so we can see why if we increase distance per rpm we are increasing miles per gallon (distance divided by gas consumption). In general smaller tires are for more torque/ acceleration while larger tires are for more speed (which is proportional to mpg).

A brand new engine vs a used one is barely a $2000 difference. 75% of the cost of a swap is going to be labor. A s/c is going to be around $1000 less than an engine of similar condition, on average, and can be installed in an afternoon by any Joe with a decent set of tools.

 

It does not. Would be nice if it did. I have seen a few people retrofit intercoolers to the 1st gen supercharger systems. There was actually just a 1st gen trd supercharger in the for sale section that was modified to run an intercooler.

 

The only way to cool the boost is meth injection. The URD 7th injector slightly cools the boost since it injects the fuel directly into the SC. Not as effective at cooling as meth though.

 

Detonation is bad, m'kay.

 

Well obviously if i put the hammer down, i'll use more fuel. but if i don't drive like an asshole, i'll keep my in-town and cruising mpg's. The extra power will be nice offroad, and at higher elevations.

That's the best part about forced induction, power on demand, without increased displacement.

 

Nitrous works too.

 

well this just pretty much confirms my thoughts about SC in that its just about hp and doesn't give you any benefit in mpg or towing if its going to suck gas like crazy when actually used. I mean whats the point of having it if you aren't going to use it and I wouldn't want to use it if it ruins my mpg when the point of searching for a way to get more power is just to increase my mpg by having more power then I need to use.

 

its all about benefit vs cost and what your true intention to get from it is. im too old to be looing for more power just for the sake of having more power. im more about maxing out the most mpg I can get and if something I do in searching for that helps get more power, its a bonus

 

Black helicopters ftw

 

It won't ruin your MPG lol, there's some middle ground there. Why do you think all the OEM's are switching to smaller engines with turbo's? A supercharger is a similar way to the same end game.

 

Yeah clay is right on this one keakar.
There is alot to this subject as to why a larger tire can cause bad mpg's. But in the case of downsizing tire diameter(from stock sizing), each time the diameter is downsized you will be turning more rpm to hold the same speed that used to be achieved with less rpm.