[VGSON]

Curious: Ive reached out to a vendor/shop about making an bmw n54/55 to sbc trans adapter. goal is to have th400 for drag racing and a tremec to replace our less than ideal manuals.

I want the manual since it will hold more power, shift better, and 6th gear would allow you to cruise at a much lower rpm. these can be pulled from junkyards or bought new with many different gear sets.

TH400 would allow transbrake and tons of gear options. Pulling front wheels on launch and less shifting. plus its relatively cheap comparatively

More interest, cheaper…..anyone?

[LA1Z24]

Or you could just build a ZF8 and have 2 overdrive gears and will bolt in no custom fabrication or wiring. It can be built stronger than a manual transmission. There is a ZF8 trans brake kit available as well

[VGSON]

zf8 speed cost more, weigh more & can have hiccups during runs. Hence why big power racers/cars move to powerglides and 3spds.

This is a solution for those making a dedicated race car with a lot of power, while also being cost effective. junkyard parts and local speed shop can build it or you can..or get a custom one for half the cost of a zf8. if you want overdrive, then a 4l80e is an option too. along with many gearsets

t56/tr6060..or a dogbox..for those who want to shift. or add a sequential to the mix..our manual transmissions dont have a solution yet.

[-Eidos]

Originally Posted by VGSON

Curious: Ive reached out to a vendor/shop about making an bmw n54/55 to sbc trans adapter. goal is to have th400 for drag racing and a tremec to replace our less than ideal manuals.

I want the manual since it will hold more power, shift better, and 6th gear would allow you to cruise at a much lower rpm. these can be pulled from junkyards or bought new with many different gear sets.

TH400 would allow transbrake and tons of gear options. Pulling front wheels on launch and less shifting. plus its relatively cheap comparatively

More interest, cheaper…..anyone?

I'm currently exploring options in this space too as my 3rd gear is grinding now.

Grannas Racing is doing development on a T56/Tremec conversion for the f-series b58 manual trans. I believe the B58 manual trans is a variant of the GS6-45BZ used on N55s and S55s.

Another point to consider is the factory gear position sensor. The ECU relies on this for auto rev matching, boost/torque by gear, etc.

[LA1Z24]

Originally Posted by VGSON

zf8 speed cost more, weigh more & can have hiccups during runs. Hence why big power racers/cars move to powerglides and 3spds.

This is a solution for those making a dedicated race car with a lot of power, while also being cost effective. junkyard parts and local speed shop can build it or you can..or get a custom one for half the cost of a zf8. if you want overdrive, then a 4l80e is an option too. along with many gearsets

t56/tr6060..or a dogbox..for those who want to shift. or add a sequential to the mix..our manual transmissions dont have a solution yet.

You don't know what you're saying man. The ZF is found is many cars including trackhawks, hellcats, etc. There are no issues with this transmission. In fact it is ubiquitiously known as the best torque converter transmission ever created. How you could say a TH400 is better is beyond me.

The fastest "stock" bmw in the world, a 23 M240i, runs 8 seconds on a zf8. I dont hear him complaining about hickups. In fact, that guy previously build a 340i with a ZF that also slayed everything it raced.

[VGSON]

Originally Posted by -Eidos

I'm currently exploring options in this space too as my 3rd gear is grinding now.

Grannas Racing is doing development on a T56/Tremec conversion for the f-series b58 manual trans. I believe the B58 manual trans is a variant of the GS6-45BZ used on N55s and S55s.

Another point to consider is the factory gear position sensor. The ECU relies on this for auto rev matching, boost/torque by gear, etc.

Nice i see they do a lot of mk4 supra parts. My buddy has a 1000hp capable 340, but is limited for same issues. He’s awd and manual(nervous about turning it past 750 or so). Also a n54 drag build which is what we’re looking at the th400. Cars already built motor, stripped, and caged..just needs a big single and a trans. Im rwd n55 & wanting a t56 magnum or similar. I believe the gear position sensor could be worked around using the bmw sensor and a lil engineering. I’m wanting a t56 for my m2 eventually. There’s also very expensive replacements or little to no upgrade options for manual guys.

[VGSON]

Originally Posted by LA1Z24

You don't know what you're saying man. The ZF is found is many cars including trackhawks, hellcats, etc. There are no issues with this transmission. In fact it is ubiquitiously known as the best torque converter transmission ever created. How you could say a TH400 is better is beyond me.

The fastest "stock" bmw in the world, a 23 M240i, runs 8 seconds on a zf8. I dont hear him complaining about hickups. In fact, that guy previously build a 340i with a ZF that also slayed everything it raced.

Thanks for chiming in. This obviously isnt for you. Take care