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XRAY T4'21 Spec

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01-05-2021, 07:39 AM

#121

freebird

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Quote:

Originally Posted by Sortafast

the largest difference I’ve noticed has to do with the top plate and motor mount / T brace assembly.

I’ve been having a lot of fun experimenting with the flex settings between those items and have found the car to be very responsive to those changes.

Im hearing other things too........... TJ tells! lol

01-05-2021, 09:02 AM

#122

NEED-MORE-SPEED

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Hello everyone... I wanted to share an update from the T420 to the T421 that isn't specified. The shock shafts are 1mm shorter on the 21 car from the 20.

Keep this is mind if your looking at replacement shafts or have additional T420 shocks already prebuilt for testing to put on the 21

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01-05-2021, 10:21 AM

#123

mr.rev

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Good info, thanks. PSS users will find this a welcome update.

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01-05-2021, 10:24 AM

#124

Dan

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So PSS users, what spacing are you guys using for the bottom of the shock to the top of the eyelet. 9mm? 8.5mm? 8mm?

I know Hagberg recommended running 0.5mm shorter but that was with the T4 20 shafts.

01-05-2021, 10:33 AM

#125

Sortafast

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Quote:

Originally Posted by Dan

it’s the threaded area that got shorter. Use what you would have before.

01-05-2021, 10:56 AM

#126

NEED-MORE-SPEED

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Quote:

Originally Posted by Sortafast

it’s the threaded area that got shorter. Use what you would have before.

I could be wrong from my measurements as I did measure/compare just the threads as well... The threaded portion is .5mm shorter and the non threaded portion is .5mm shorter for a total of 1mm shorter shaft. Suppose we can get another set of eyes and calibers on the case just for confirmation lol

01-05-2021, 12:14 PM

#127

Sortafast

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Quote:

Originally Posted by NEED-MORE-SPEED

You have me wondering if you got an older shaft somewhere along the line.. I know how we can check!

01-05-2021, 05:10 PM

#128

theproffesor

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So what are the 52mm ESC shafts supposed to offer over the 51?

01-05-2021, 05:25 PM

#129

NutDriver

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Quote:

Originally Posted by theproffesor

So what are the 52mm ESC shafts supposed to offer over the 51?

1mm more! (sorry. had to)

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01-05-2021, 06:35 PM

#130

theproffesor

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Quote:

Originally Posted by NutDriver

1mm more! (sorry. had to)

that’s what she said!

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01-05-2021, 07:22 PM

#131

KE4PJO

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Quote:

Originally Posted by theproffesor

So what are the 52mm ESC shafts supposed to offer over the 51?

They will help steering on exit of turn but sacrifice a bit on entrance...

01-06-2021, 04:49 AM

#132

NEED-MORE-SPEED

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Quote:

Originally Posted by theproffesor

So what are the 52mm ESC shafts supposed to offer over the 51?

To keep things simple... 52mm drive shafts will give the car more corner speed in higher grip conditions while making the car easier to drive as well. Basically helps polish and refines the overall steering to help maintain maximum traction, thus providing more overall steering and a smoother driving experience.