Finally Upgrading After 18 Months Of Ownership

YamahaRick · Jun 2, 2026

I just ordered the Gearhead Kit as well as downpipes with cats from PPE. Found a nearby shop that will ceramic coat the pipes, as well as another good shop to do the install.

I have a dyno appointment tomorrow for a "before" run. I will also do an "after" run.

I've learned a lot from the forum, so thanks to all that contribute here.

YamahaRick · Jun 4, 2026

Received confirmation pipes and tune kit will both be here next Monday.

Had a baseline dyno run performed yesterday. Unsure how to interpret results in the graph provided, nor do I believe the numbers shown. My assumption was with a rating of 365HP at the crank wheel output would be quite a bit lower. The dyno was a Mustang brand.

My only concern is comparing before and after, so I am not worrying about it too much. I also had the guy send me a text file with raw numbers. Once I have it imported into Excel and formatted, I will post that.

Texas Marauder · Jun 4, 2026

IMO, torque looks high. My results on a Mustang dyno were 308 HP, 320 Torque, completely stock.

YamahaRick · Jun 4, 2026

Texas Marauder said:
IMO, torque looks high. My results on a Mustang dyno were 308 HP, 320 Torque, completely stock.

Aren't those very optimistic numbers (both mine and yours) for a stock configuration?

Texas Marauder · Jun 4, 2026

I don't know. 15% driveline loss on the HP seems reasonable.

Zpak · Jun 4, 2026

Texas Marauder said:
I don't know. 15% driveline loss on the HP seems reasonable.

View attachment 97720

I was always under the impression we’re closer to 20-25% loss.

Texas Marauder · Jun 4, 2026

All I'm saying is that IF the engine is 365 HP net and IF the dyno 308 HP is correct, that works out to approx. 15% loss. Maybe neither is correct. It's all a numbers game.

Finally Upgrading After 18 Months Of Ownership

YamahaRick

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Texas Marauder

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Zpak

Es Aich Oh!

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