midnightracr
Member
- :
- Mazda,MP3
Great thread. Now lets see if we can talk to Eagle to make us a steel crank
Forged Internals
- Thread starter TheJohnny
- Start date
true that!
You can buy the WRC hardened gears though... problem is they are 1000 dollars EACH... so a total of 5K for the full set... ouch.
But backing up... no one has shredded gears yet that I know of... lots of destroyed forks... a number of snapped axles... but I don't know of anyone (but that doesn't mean much!) that has actually sheared gear teeth from power or twisted shafts off yet... so the tranny hasn't been murdered yet...
I know the 427 hp drag PR P5 has blown trannies, but they didn't say what... and drag racing on fat ass radials is a bit of another thing though as well from simply making and using power for auto-x and just plain old fun.
You can buy the WRC hardened gears though... problem is they are 1000 dollars EACH... so a total of 5K for the full set... ouch.
But backing up... no one has shredded gears yet that I know of... lots of destroyed forks... a number of snapped axles... but I don't know of anyone (but that doesn't mean much!) that has actually sheared gear teeth from power or twisted shafts off yet... so the tranny hasn't been murdered yet...
I know the 427 hp drag PR P5 has blown trannies, but they didn't say what... and drag racing on fat ass radials is a bit of another thing though as well from simply making and using power for auto-x and just plain old fun.
Hey....well...I talked to him 2 weeks ago...HE BLEW THE ENGINE! And I mean, HE BLEW IT.TurfBurn said:
By the time I talked to him he didnt knew what happened. But the engine is completely gone: forged pistons and rods, head, block....everything. Although the tranny is still fine.
Well...he was running 40psi on the streets, so, it blew in one of those street races.
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- 09 370Z Nismo
ddogg777 said:
tripoint will take stock mazda shift forks and re-weld them by gusseting them (think of it as adding a strut bar, or bracing, to make it stronger). It cost me 100 for alll the shift forks, 1, 2,3,4, no reverse, no fifth gear. Costs 200 labor, 100 parts, tada. Took them about 3 days from order to finished, but they had the parts in stock. Tada, no problems, and it's the same thing they put in their world challenge proteges on speedvision. Just talk to Mark, he's the man
the forks all break on the actuator arm. There is a notch that allows one of the collars in the tranny to turn side to side inside of that arm on the fork, and then it also pushes the fork up and down on that arm. That's the weak point as it is rather thin there. By adding some material wherever they can, they can make it stronger and hopefully eliminate the breakage.
See what I circled in the picture.
See what I circled in the picture.
Attachments
If you fill that in with metal and remachine it and do something to reduce the severity of those notches (the small radiuses of the corners in that gap on the inside) will vastly improve the reliabilty of this part.
That and contrary to what I saw posted by someone in some thread on here a couple days ago... Gears are NOT meant to be slammed... So shifting light and rpm matching on the fall go a long way to protecting you from snapping that part. Keep in mind the thickness of that part is only about 1/8"-3/16" and you can get some serious forces in that tranny.... so pretty hard for it to hang on!
That and contrary to what I saw posted by someone in some thread on here a couple days ago... Gears are NOT meant to be slammed... So shifting light and rpm matching on the fall go a long way to protecting you from snapping that part. Keep in mind the thickness of that part is only about 1/8"-3/16" and you can get some serious forces in that tranny.... so pretty hard for it to hang on!
