Hypothetical situation:

Mid 2000's Yukon Denali. Bone stock. Truck will get a set of headers, decently quiet dual exhaust, fuel system upgrades and one of the above mentioned blowers. With either blower, pulley set up will result in a max of 8 psi of boost.

This is a daily driver. Which one would be more entertaining to drive?

Zero future intentions on "turning it up".

 

You would never be able to tell a difference at the same boost level.

 

I went with the 2300, boost seems to be immediate to me (compared to all my centrifugal and turbo setups on past rides)

Have 1 3/4 arh headers with cats, true dual 3 inch exhaust with an x pipe, and a drop in 255 lph intank from lingenfelter. I see 7-8 with a 3.3 pulley on the 2300. I went 2300 because I tow with this pig didn't want to push the blower, and if this engine craps I'm probably going to throw a stroker of some sort into the pig. Definetely woke the 7k lead sled up.

 

Some say the 1900 makes boost faster, I say bs. I've driven and tuned both, if there is a difference then it's not noticeable driving. They both respond identical, a 1900 would easily do what you want but it's not much more to do a 2300 either so.....

 

The 1900 does in fact make boost a CH faster... but I'm here to tell you there is absolutely no SOTP difference. I think a lot of it has to do with how fast you spin them. Making 8PSI with both the 1900 is spinning faster getting it to its sweet spot quicker. With the same exact pulley the difference is negligible.

Here is some video evidence that there is no noticeable difference between the 2.
TVS1900:

TVS2300:

As for which one is making boost faster... I cant tell.


In my opinion if you truly are stopping at 8PSI I would get the 1900 just to keep a couple hundred in your pocket. Why spend the money for potential you wont even use. Another thing... without a cam swap the 1900 will make more boost than you want to anyway... so it will take a lot of upgrades to get to the point where the 2300 is truly useful over the 1900. Once you're there though, its priceless.

 

Those videos dont show anything, we ran a stock inlet and restrictive filter on Marks TBSS at one point and after opening everything up it hit max boost faster by a noticeable amount. Also were both videos flat pedal to floor at once? I can tell from the videos they were not. On that note, I would love to see a boost gauge on both with the same setup and see off idle pedal to floor.

On another note, i have a scan where I go WO off idle and I hit full boost in .6 sec from 10% TPS.

 

Its the actuator that would really determine how fast the boost hits. In stock form there is a restrictor in the line, but if you enlarge or remove that, as soon as vacuum is lost to the reference the spring will snap the bypass valve shut and all the air goes through the blower. Seeing as how the blower is spinning at least twice as fast as the motor, two revolutions would be all is needed to fill in the air in the intake. 3000rpm is 50 revs per second, so divide by two and thats 25 revs, or half a second to go from none to all the boost.

The bigger the ratio between the crank pulley and blower pulley the faster it will happen. If blower pulley is 1/3 size of crank pulley then its 50/3 =17 revs or 1/3 seconds from none to all.

 

The point of the videos is to show that there is no meaningful difference. Not to prove that one has a SOTP advantage over the other. I'm going to re-word my last post to make that more clear.