How Fast Do I Spin My Blower

In this Steve Tech Video I am going to talk about the importance of Blower speed.

[Hitman-dsei]

Tuning for combustion events not boost bragging rights, I love it

[indasandboxtakenrockets]

Slow is Smooth, Smooth is Fast. Thank you Steve

[LaswellB]

Very interesting. I think people have a tendency to get fixated on boost psi and lose site of a healthy engine first. Thanks for the helpful video.

[lorenmorelli]

"Blowing the Candles Out" - I would love to have this set up for a birthday present!!

[bigredracer]

75👍's up Steve thanks again for having us all over for the day

[justinvanburen]

You are amazing!!! Please keep the great info coming!! I learn more from you than half these other fools on YouTube!!

[genelong]

Excellent advice Steve.
Looking forward to more tech talk.
Thanks for sharing your hard work with us.

[thebrowncobobber]

Cheers Steve. I'm learning so much from you right now!

[robertm]

Loved the video Mr Morris! I remember when I boosted my 2016 2ss camaro new. with a 2300 blower and went to a 2650 with a ton more cooling 4 years ago. The 2650 spins slower(8”lower) the upper pulley is now a 4” compared to to the 2300 with a 3.75” I am running less boost but a much lower iat and I have more timing and more power to the rollers.

[tomv]

I’m reading about this in an engine building book and supercharger design. It all comes back to air density and temperature. The faster the blower turns, the more temperature is generated in the blower and transfers to the air. There is a point at which this becomes negative for air density in the combustion chamber preventing good burn of the fuel.

With that said, density altitude changes will have an effect on the tune. There is a lot of science behind engines, especially OEM engines now just to pass emissions.

When it comes to blowers, bigger is better.

Always great info here, keep it up

[frankensteincreations]

Timing over boost normally always will make more or better power. As long as the fuel can keep detonation under control. Just had this conversation this morning with an old timer engine builder in my area. What a coincidence. Nice video!

[tookracing]

Great video as always Steve love your work from Sydney Australia

[TheOldblue]

Steve that’s great info, I just spoke with you other day on my build you guys went thru for me recently as needed suggestion on pulley sizing to slow blower and decrease some boost but I think my tuner was having same issues as at 20 lbs on pump having to pull so much timing ignition wasn’t happy at all, I knew as soon as he told me had to close plugs up and it has rough spots where flame 🔥 front is clearly not happy, knowing what actually happens in a engine like you just explained saves you from trying to tune around a problem and actually fix the problem, thanks again for all you do sir.

[Supercrewchief]

Great info. Thanks for sharing, Steve!

[swissmochaj]

That's pretty cool. What would be cooler is to see this jet boat boogie!

[jeffhopper]

thanks Steve. New to channel. Love it. Fabulous engineering and know how!

[benitovanrensburg]

Thanks for all the info Steve, keep up the good work.

[havebenthere]

Love your videos! So many people are always throwing more boost at an engine on weak fuel and pulling timing out when they could back off the boost and go it better with better timing. I wonder if the engine would've responded to even less boost with more timing?

[exploranator]

I know this is a supercharger, not a turbo, but:

You know one thing you've never thought about before?

If you are running a turbocharger and have to dial back the timing to use lower-octane gas, it puts more energy into the exhaust gas due to later timing, which energizes the turbo better due to later combustion. That energy that WOULD have been used to push down that piston is instead having some of it go into the exhaust flow because the spark happens later.

So, the irony is that with a turbo motor, you may get more responsiveness from the turbo if you time it for 87 octane gasoline, due to a more-energized exhaust stream. You will get more overall power from hi-test gas, but you will get a quicker turbo spin-up from the low-buck gasoline.

Try it on a turbo motor some time and watch the boost response curve of the same gas timed for 110 octane and then timed for 87 octane. More power used to push down the piston with the advanced timing, more energy spinning up the turbo on the 87 octane-suitable less-advanced timing.

I guarantee you you have never thought of that before. Tuning for cheaper gas on a turbo motor can flatten your torque curve. Lower overall power, yes. SOONER turbo response, though, also YES.

[SARJENT.]

Thank you for sharing. That was interesting data.