Synchromesh Gearboxes Suck. Racers Use THIS Instead

If you have watched any form of professional motorsport you will have seen drivers shifting through gears at lightning speed often without even lifting their foot off the throttle. How?

Andre runs us through what a synchromesh gearbox is and why it cannot shift as fast as a dog engagement gearbox. As well as shift speeds of 30 to 80 milliseconds depending on the setup, a dog box can also be set up to sequentially shift through the gears by either manual or pneumatic actuation, and sometimes even both options are on hand via paddle shifts and a strain gauge fitted shift lever.

If this video looks familiar to you that is because it is from RaceCraft, a company we merged into HPA back in 2020 and the content is too good to not post up on this channel 😎
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TIME STAMPS:
0:00 - High-end Motorsport
0:10 - 'Conventional' Gearbox: Syncromesh
1:09 - Faster Way: Dog Gears
1:53 - Shifting Speed
2:14 - No Clutch!
2:38 - H Pattern OR Sequential
2:58 - Sequential Gearbox Setup
3:28 - Free Stuff
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FREE LESSONS:

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LINKS:
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TAGS:
#highperformanceacademy #dogbox #gearbox #gearshift #dogengagement #sequential #learntotune #enginebuilding101 #dontletthesmokeout #wiring101 #dieseltuning #datanerd #gofasterwithdata #racecraft #learndriveoptimise #motorsport #buildtunedrive

[hpa]

TIME STAMPS:
0:00 - High-end Motorsport
0:10 - 'Conventional' Gearbox: Syncromesh
1:09 - Faster Way: Dog Gears
1:53 - Shifting Speed
2:14 - No Clutch!
2:38 - H Pattern OR Sequential
2:58 - Sequential Gearbox Setup
3:28 - Free Stuff

[ATomRileyA]

Great video explaining things.

I used to have a car with a CAT engagement gearbox so it would only go into the right gear when it felt like it and sometimes it was taking a nap and would not respond.

DOG's are better and tend to be better at following instructions :)

[MightyTubbyTuba]

I always wondered but never actually looked it up, thank you for the short informative video!

[noahwhite]

Another excellent video guys! Thank you for all your hard work!!

[JETZcorp]

Dogboxes makeva lot of sense to me, because it's how basically all motorcycles work. Synchros are still mysterious to me.

[MichaelFarrell-nozw]

Great video! I've never 100% understood how dogs work, got it straight away here.

[PreludeDude]

Thank you for this video and clear vision into dogboxes! I'd like to ask what gear selector is preferred for a transmission like this, for street and track driving since it will be a actuated off a switch?

[enoswhitaker]

Same as a motorcycle transmission shifter forks and gears.

[chippyjohn]

I would love to see an in depth video of the Hollinger factory. Not a lot about them on the internet.

[Runmeerkat]

Is it common for the selector ring to pop out when you go from full to 0 load?

[stevemcilroy.]

Might sound like a stupid question, but can chipped teeth on dog gears be repaired, or are the gear kits knackery after that point?

[denimpantz]

You know, it always interested me how drivers in NASCAR shifted the H pattern without the clutch. Now I know why.

[MadsKongsved]

You don’t need an ECU controlled torque cut, a lift of the throttle pedal should suffice.

[claymore]

You don't need to use the clutch when you upshifting but you have to use it when downshiftibg

[Marko-hrrj]

You have a regular manual gearbox without Synchromesh. The so-called non-synchronized manual gearbox that was used in the 70s in f1

[smokestrong]

what about straight cut syncromesh gears? I heard they're not as noisy

[grpltdot]

they should remove the synchros from sport manual cars

[nospeedlimits]

Dogbox is non sense on streetcars cause it ruins quickly.. as far as racecars, dogbox is much less effective than sequential box.. more, lots of racecars use synchrmesh with straightcut gears or less pitch gears to split forces. Transmission style cannot beat huge engine horsepower!