Project: Savage Flux 5T

[Finnster]

LOL @ Bondo :) I know what my wife thinks about my "all-knowingness" and thinks I'm mostly "all-full-of-it".

I repeated a bit of what you guys said while I was typing.

Do you have any idea of the FDR needed on a 5T Flux?

The other problem I saw when I was looking at my Sav conversion was loosing the gear reduction of the tranny when going to a CD. The tranny has a ~2.2:1 reduction.

The bulletproof diffs are lower GR than the originals as well. 3.22 vs 3.42. With only a 3.22 reduction and no tranny, you need a big ass spur and small pinion to make a decent FDR. Of course, big ass spurs want to hang low out the bottom....

[Bondonutz]

Originally Posted by Finnster

Its worth noting too that there are two different idler gears for the flux tranny, and the new BP diffs lower the GR from the old diffs.
I'm not quite sure you mean by offsetting the tranny, as it entirely spans the TVPs and also serves as a brace. Two notches are cut in the TVPs for two nubs on the side of the trans case to rest on the TVP notches for support. Its pretty much locked in place.

Note, I'm not saying its not possible, just care has to be taken in gear and motor selection, and some planning in the mounting the motor mount so it sits low vs the tranny so more lateral movement is possible. I don't think anything larger than a 15 series can be used w/ the tranny and have any hope of fitting inside the TVPs.
Mike's new universal CD mount would work great on this app, and just ditch the heavy ass tranny all together.

This is where I'm at a disadvantage because I've never owned a Savy, So I'm stabbing in the dark with my ideas.

Originally Posted by Finnster

LOL @ Bondo :) I know what my wife thinks about my "all-knowingness" and thinks I'm mostly "all-full-of-it".


Do you have any idea of the FDR needed on a 5T Flux?

Well I pretty much agree w/the wifey. I'm just being repsectfull sir.

Sorry FDR ?? I'm a little slow sometimes.

[thzero]

Mmms.. you have a point there. Truggies are running a 4.3 reduction.

Originally Posted by Finnster

The other problem I saw when I was looking at my Sav conversion was loosing the gear reduction of the tranny when going to a CD. The tranny has a ~2.2:1 reduction.

The bulletproof diffs are lower GR than the originals as well. 3.22 vs 3.42. With only a 3.22 reduction and no tranny, you need a big ass spur and small pinion to make a decent FDR. Of course, big ass spurs want to hang low out the bottom....

[Bondonutz]

Originally Posted by thzero

Mmms.. you have a point there.

Agree, did not compute in my pathetic brain until quoted.

Edit, Pardon me for not thinking this through prior to posting.
What about a 1527/1500KV motor on say 8s with a CD, the gearing will still be ugly high for the application ?

[nitrostarter]

Originally Posted by Bondonutz

Agree, did not compute in my pathetic brain until quoted.

Edit, Pardon me for not thinking this through prior to posting.
What about a 1527/1500KV motor on say 8s with a CD, the gearing will still be ugly high for the application ?

Most definitely. 44,400 rpm's and a fast FDR sounds like a high speed running rig. The standard flux f/r diff ratio is 3.3 and the bulletproof is 3.22 so they are relatively high speed compared to Truggy(4.3).
In order to run a CD would would need a lower KV motor or big spur/little pinions, which tend to wear out faster. Even on 6s with that motor, you would need about a 15/51 pinion spur combo and still push 50+ mph.

[thzero]

Mmms, you'd need a different pinion for the front and rear diff. Instead of a 13 tooth pinion, you'd want to use a 10 tooth pinion. This would give you the same gear ratio with a center diff as a truggy. Or if using the bulletproof diffs, you'd need to run a 7 tooth pinion instead of 9 which would give you a 4.14 ratio so you'd need like a 47 to 52 tooth spur and a 11 or 15 or so pinion.

Basically you'd need someone to machine a replacement for parts #86031 or #102246. Or try and replace the diffs with something else. What is the ratio of the Cen diffs?

[Bondonutz]

Originally Posted by nitrostarter

Most definitely. 44,400 rpm's and a fast FDR sounds like a high speed running rig. The standard flux f/r diff ratio is 3.3 and the bulletproof is 3.22 so they are relatively high speed compared to Truggy(4.3).
In order to run a CD would would need a lower KV motor or big spur/little pinions, which tend to wear out faster. Even on 6s with that motor, you would need about a 15/51 pinion spur combo and still push 50+ mph.

Originally Posted by thzero

Mmms, you'd need a different pinion for the front and rear diff. Instead of a 13 tooth pinion, you'd want to use a 10 tooth pinion. This would give you the same gear ratio with a center diff as a truggy. Or if using the bulletproof diffs, you'd need to run a 7 tooth pinion instead of 9 which would give you a 4.14 ratio so you'd need like a 47 to 52 tooth spur and a 11 or 15 or so pinion.

Basically you'd need someone to machine a replacement for parts #86031 or #102246. Or try and replace the diffs with something else. What is the ratio of the Cen diffs?

Uuug, more comlpications
Maybe getting the Flux trans to work is best then.
Thank you for the explinations on the gearing aspect gentlemen.