Those Dyno Guys

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Those Dyno Guys Speed & Sound is Florida’s elite V-Twin performance Shop. Come to TDG, Performance is all we do! No Guess work!

Those Dyno Guys is Speed Shop located in Pinellas Park Florida. Specializing in custom dyno tuning on Harley Davidson Motorcycle's and trikes. Performance upgrades such as cams and Dyno tuning is all we do! If going fast and running better while sounding great is your goal, email [email protected] today! Many shops offer performance work and dyno tuning but is that all they do?

10/15/2026

🔥 Milwaukee Eight Camshaft Timing: There’s a LOT More Going On Than You Think!

Welcome back to another episode of !

Today we’re digging into the physics behind Harley Davidson Milwaukee Eight engines and explaining why camshaft timing, ignition timing, cylinder filling, and exhaust design all play critical roles in horsepower, torque, and overall engine performance.

Ever wonder why the front and rear cylinders don’t behave identically? Or how your exhaust system can actually contaminate your fresh intake charge?

There’s a lot more to making horsepower than simply throwing a big camshaft into your Harley!

🔥 In this episode:

✅ Milwaukee Eight camshaft timing and valve events

✅ Understanding engine physics and cylinder filling

✅ Why front and rear cylinders have different tuning requirements

✅ Ignition timing and its relationship to combustion efficiency

✅ Exhaust reversion and how spent exhaust gases can contaminate your incoming air and fuel charge

✅ Why camshaft and exhaust combinations matter

✅ Real world dyno tuning tips and observations

✅ Understanding what’s actually happening inside your engine

The dyno doesn’t care about marketing claims. It only cares about physics!

Whether you’re building a mild 107, a 114, a 117, or a serious high performance Milwaukee Eight, understanding these principles can help you make better decisions about your engine combination.

I’m Matt Smith of Those Dyno Guys Speed Shop in Pinellas Park, Florida. I spend my days tuning Harley Davidson motorcycles and sharing what I’ve learned from real world testing.

👍 Like the video if you learned something.

💬 Drop your camshaft and exhaust combination in the comments!

🔔 Subscribe for more real world Harley Davidson performance and tuning knowledge.

🌐 Those Dyno Guys Speed Shop
https://thedynoguy.com

🌐 Performance Basemaps
https://basemaps.net

10/15/2026

Why would both cylinders of a Milwaukee Eight need identical ignition timing?

Look at the S&S 550 camshaft valve events:

Front cylinder:
Intake opens 9.4° BTDC, closes 29.4° ABDC.
Exhaust opens 62.5° BBDC, closes 30.5° ATDC.

Rear cylinder:
Intake opens 3.1° BTDC, closes 31.1° ABDC.
Exhaust opens 59.4° BBDC, closes 38.4° ATDC.

Different valve events mean different cylinder filling, scavenging, trapped pressure, and combustion characteristics.

Even Harley Davidson uses front to rear ignition timing bias from the factory.

Identical ignition timing doesn’t mean identical combustion phasing.

The engine responds to physics, not conventional wisdom.

Big Thanks to John Acuna for  choosing Those Dyno Guys for his power vision Dyno tune!2021 Road GlideSE Stg 4 131ciRedsh...
10/14/2026

Big Thanks to John Acuna for choosing Those Dyno Guys for his power vision Dyno tune!
2021 Road Glide
SE Stg 4 131ci
Redshift 535 cam
Khromewerks Exhaust

Jason Digiacomo got his Hog CRANKED at Those Dyno Guys today!  He got a bunch of quality parts, his sumping issue fixed,...
10/14/2026

Jason Digiacomo got his Hog CRANKED at Those Dyno Guys today!
He got a bunch of quality parts, his sumping issue fixed, a free Holiday Inn stay and a whole lot of performance
The CR480 MT is magic in a 107ci!

10/13/2026


A rare drive home. Sticking up for other Dyno Tuners. Torque Advice as well as professional counseling for new tuners.

10/12/2026
James Pacelli got a new toy!  I’ve tuned multiple of his bikes.  Today he brought me his 26 Super Glide.  He added the S...
10/12/2026

James Pacelli got a new toy! I’ve tuned multiple of his bikes. Today he brought me his 26 Super Glide. He added the SE511 cam, Thunder Header 2-1 and a Arlen Ness Method intake.
Factory ECM tuned with MadLad Solutions.
122hp 136TQ

Rider Report!!!
10/09/2026

Rider Report!!!

10/09/2026
10/09/2026

160 hp 155tq

Address

7200 73rd Street North
Pinellas Park, FL
33781

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm

Telephone

+17632633966

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