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Index > @ the Pickup Bed (General Topics) > Thread: Torsion strength calculations for the REPU - How much Torque(NM) can it take?
Thread: Torsion strength calculations for the REPU - How much Torque(NM) can it take?
mazdafun


1st Gear
Posts: 22
posted March 12, 2013 07:01 AM

Torsion strength calculations for the REPU - How much Torque(NM) can it take?

Hi all.

Has anyone ever calculated the stiffness of the REPU frame? I am changing my engine to a 13B Turbo, and have to prove that the frame has the torsional rigidity to take the new engines 248 Nm (going for a S5 TII).

Have anyone calculated this before?

Do anyone have a body manual shoving the factory measurements of the frame?

I am sure the frame can handle this. I just have to put the numbers down to support my claim to the "DMV".


       
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Jeremiah


Revvin Up
Posts: 56
posted March 13, 2013 07:28 PM

Why would the DMV even need to know what sort of horsepower you have anyway? Tell them a low number, doubt the character behind the desk even knows what a turbo is. Bull shit them...

       
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mazdafun


1st Gear
Posts: 22
posted March 14, 2013 08:27 AM

Trying to "do the right thing", for once

Hi.

I am trying to do the right thing for once, and got the ball trown back at me. I will compare the BT-50 frame with the REPU. The BT has a diesel engine with 330 Nm, and if the frame is similar construction, the argument is strong that the 250 Nm will do just fine in the REPU-frame.

       
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Slinky


Revvin Up
Posts: 56
posted March 21, 2013 05:45 AM

are you suggesting the rotary is going to put out to much torque?... :P My repu has a built toyota motor swap putting down well over double the stock torque or the factory motor and there are no issues...I'm about to do a small block swap...which is going to be more torque then this truck will know what to do with.

people have been doing courier small block swaps forever and i haven't herd of any issues with tweaking frames, throwing steering outa whack...should be fine with newer rotary swap. if all else fails, box in the frame, throw some cross bracing and gusseting in and call it a day. :)
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74 Mazda Repu-20/22r toyota hybrid swap (working on 302/T5 swap)
83 Mazda rx7-302 swap,t-56, N2o
82 Mazda rx7-460 swap, 4 speed, working on boost
78 Ford F-250 4x4-420 hp 400M, C6, 7" lift
83 Toyota Celica GTS-gutted (future 20/22 home)
86 Ford Ranger 4x4-1/2 ton axle's, 63"leafs, vw TDI swap
53 GMC 1/2 ton Pickup-Vortec 5.3 swap, T350, 9"
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admin


Administrator
Posts: 446
posted March 21, 2013 08:58 AM

quote:
are you suggesting the rotary is going to put out to much torque?... :P


mazdafun has to put up with much more than US DMV's since he's in Europe (Norway)...

We don't have to perform such calculations or be that detailed in the states when doing engine swaps.

Anyway, the best I could find is the rigidity of other Mazda rotaries:

Mazda Rx-8: 30,000 Nm/deg
Mazda Rx-7: ~15,000 Nm/deg

If you have a chart or lookup site at the Norway DMV, maybe average a Toyota truck, Nissan, and other Mazda trucks?
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Slinky


Revvin Up
Posts: 56
posted March 22, 2013 03:56 AM

quote:
quote:
are you suggesting the rotary is going to put out to much torque?... :P


mazdafun has to put up with much more than US DMV's since he's in Europe (Norway)..


That would explain a lot. From what I have seen Repu's where only sold in the U.S....


____________
74 Mazda Repu-20/22r toyota hybrid swap (working on 302/T5 swap)
83 Mazda rx7-302 swap,t-56, N2o
82 Mazda rx7-460 swap, 4 speed, working on boost
78 Ford F-250 4x4-420 hp 400M, C6, 7" lift
83 Toyota Celica GTS-gutted (future 20/22 home)
86 Ford Ranger 4x4-1/2 ton axle's, 63"leafs, vw TDI swap
53 GMC 1/2 ton Pickup-Vortec 5.3 swap, T350, 9"
83 VW Cabriolet-16vaba-T swap
95 VW Golf-Harlequin Project
81 Chevy El Camino-Gutted (5.3 vortec victim)

Facebook.com/NWMetalWerks

       
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