JSRF Speeds + Calculator (data from 7thAce)

Thanks to the CXBX Emulator, we are now able to determine speed values by looking at the game's RAM.

A diagram put together by 7thAce. Link

More info:

Boost Drop +KTR / +KTW = 429 (not on diagram)

TJ = Trick Jump
FB = Frameboost
N2R = Next to Rail (Kis the rail after skating next to it and hopping on)
KTR = Kis the Rail
KTW = Kis the Wall
Drop = Falling off of something without jumping.

FB Modifier = 8/7
KTR/KTW Modifier = 10/7
Telephone Pole Jump Modifier = 1/2
Telephone Pole FB Modifier = 1/2 * 8/7 * 5/4 = 5/7

Speeds of Noteworthy Test Runs

YayodelaRiva - Kibogaoka Hill - Jet Dash - 1:15.41 (WR) Link
Initial Speed = 300 (Boost Drop)
+FB
+FB
+KTW
+FB
+KTW
+FB
+FB
+KTW
+KTW
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

New Speed = 2436 (9.7x Full Grind) (8.1x Boost)

Xano - Highway Zero - Jet Dash - 44.55 (WR) Link

Initial Speed = 300 (Boost)
+FB
+FB
+KTW
+FB
+FB
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

New Speed = 731 (2.9x Full Grind) (2.4x Boost)

Chuo Street - "Stall Launch"

Initial Speed = 240 (Boost Jump)
+KTR
+KTR
+KTR
+FB
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

New Speed = 800 (3.2x Full Grind) (2.66̅x Boost)

YayodelaRiva - Highway Zero - Jet Dash - 52.91 Link

Initial Speed = 200 (TJ)
+FB
+FB
+FB
+FB
+FB
+FB
+FB
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

New Speed = 509 (2.04x Full Grind) (1.7x Boost)

Jabro - Sky Dinosaurian Square - Jet Dash - 21.20 (WR) Link

Initial Speed = 300 (Boost Drop)
+FB
+FB
+FB
+FB
+FB
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

New Speed = 585 (2.34x Full Grind) (1.95x Boost)