26 replies to this topic

[salamiman]

Hi All,

 

Looking to improve diff strength & for ease will try the Banjo 28mm spline Truetrac route.

 

Have spoken to 3 different diff builders & all of them reckon they can take up to 400 RwHp.

 

Has anyone had any experience good or bad with the SCW or Harrop truetracs?

 

Thanks.

[I'm a Red Motor fiend]

I run an SCW centre and his axles. No complaints so far, straight forward fit.
400 rwhp for the centre maybe, crown and pinion will grenade well before then.

[salamiman]

Thats what I thought, but Spoke to 3 reputable shops about the truetrac banjo or BW conversion.

I queried One that is thrown around here a bit, Diff technics sydney, told him i might eventually put a 400hp 308 behind a manual box, recons it would do it easy, has seen the banjo-truetrac take up to 500hp & its the easiest way to go.

Mentioned using the V8 yoke & larger 3.08/2.78 diff centre carrier as its stronger.

Think the guys name was Con?

Diff king in Melb & SCW in Syd said very similar things.

[salamiman]

I know you like to push your car a bit Adam, what do you thrown at your diff setup, hard shifting, sideways fangin on corners, burnouts, all of the above......?

& how often.

[N/A-PWR]

Never blown a Bango or axle @ 200 plus HP,

 but torque is the pressure.

Need a good dual clutch or a strong auto to snap something

Edited by N/A-PWR, 01 December 2023 - 08:38 PM.

[salamiman]

Too true.
Autos are usually gentler on diffs, so are smaller tyres, only running 225s on the rear.so even if I have abit of torque, the wheels will probably spin first.
Back to the original question harop or SCW any difference?

[N/A-PWR]

Too true.
Autos are usually gentler on diffs, so are smaller tyres, only running 225s on the rear.so even if I have abit of torque, the wheels will probably spin first.
Back to the original question harop or SCW any difference?

 

Great Answer.

I say SCW for next size up,

 or pay the Brand price

 

edit:

Personally,

Legs is best in a light Tory,

 and I would get this for $1,075 bucks now:

https://www.ebay.com...tm/265261236435

Edited by N/A-PWR, 01 December 2023 - 09:48 PM.

[claysummers]

That is tempting. But I got a shortened BW cheap. Open wheeler but.


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[salamiman]

That is cheap at the moment.

Thought I seen Chinese knockoff true tracks for BW diffs around 500 bucks correct?

My thought is for two grand. get a stronger diff, easy conversion. I'm not into burnouts too much drive fairly aggressively otherwise I think it should last fairly well and in the end could always sell the axles and centre as I don't think they'll ever break.

[Shiney005]

I just bought a Trutrac through Harrop. I was steered away from SCW because of their (lack of) customer service.

[grumpy xu1]

That is cheap at the moment.

Thought I seen Chinese knockoff true tracks for BW diffs around 500 bucks correct?

My thought is for two grand. get a stronger diff, easy conversion. I'm not into burnouts too much drive fairly aggressively otherwise I think it should last fairly well and in the end could always sell the axles and centre as I don't think they'll ever break.

Apart from good sticky tyres on a track surface, nothing is going to be harder on it, than a burnout, as in decent burnout.

[salamiman]

thanks for the input fellas

[I'm a Red Motor fiend]

I know you like to push your car a bit Adam, what do you thrown at your diff setup, hard shifting, sideways fangin on corners, burnouts, all of the above......?
& how often.

Mate I've hardly had this bloody motor running since it was built. One stuff up after another.
Currently have the cam out and putting my Clive 191A back in.

It's ultimately up to you but if you can put up with the less than ideal customer service from James at SCW, maybe go with him? That way you can get billet axles from him also to suit.
His product is good and you will eventually get it.

[claysummers]

Bloody red motor camshafts. My mate has now gone steel roller cam. Changes everything.


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[Statler]

Consider having a new thick walled tailshaft made . 

[salamiman]

I know we all love our little sixes, giant killers ,but maybe the idea of a mild 308 wasn't such a bad idea. Only time will tell to see how I go, happy with its performance at the moment. Running a 35803 crow cam.
Have ordered the bits through SCW.

[yel327]

I know we all love our little sixes, giant killers ,but maybe the idea of a mild 308 wasn't such a bad idea. Only time will tell to see how I go, happy with its performance at the moment. Running a 35803 crow cam.
Have ordered the bits through SCW.

 

If I ever get an LC-LJ it'll be a 308. Just higher compression, larger valves, a roller cam, decent springs and Quadrajet Sniper. Or a VN-VS top end on a 308.

[Grumpy72LJ]

I will be chasing one of these banjo centres if I can get one. But there will only be 200hp and no burnouts. Too old…

[salamiman]

I will be chasing one of these banjo centres if I can get one. But there will only be 200hp and no burnouts. Too old…

Your never too old! 

[Adz1604]

I run a SCW centre 3.08, with his 28 spline axles and extended studs from nice products Sydney. I use synthetic oil, had no issues and is quite. James did use quality bearings and lapped the gears. I had it built in 2021 and the wait time was longer than expected but everything was at that time.
One thing I will say if coming out of a corner and and too much right foot is used the tyres will hook up you will go wherever the rear tyres are pointed.

[yel327]

I run a SCW centre 3.08, with his 28 spline axles and extended studs from nice products Sydney. I use synthetic oil, had no issues and is quite. James did use quality bearings and lapped the gears. I had it built in 2021 and the wait time was longer than expected but everything was at that time.
One thing I will say if coming out of a corner and and too much right foot is used the tyres will hook up you will go wherever the rear tyres are pointed.

Reminds me of my teenage years riding Honda ATC’s, only with those you just lifted the inside tyre (by leaning out on a corner) and it’d steer. Can’t do that with a car unfortunately!

[salamiman]

Bit of feed back on the SCW trutrac & 28 spline axels.

 

Built a 308 banjo housing up,with 336 gears(278/308 housings apparently stronger & happend to have one).

 

New axels were firm to get into the new centre, had to tap in with some firm taps with the handle end of a 3lb hammer.

 

Used 80/90 castol gear oil as per eaton specs, although 70/140 lsd oil was advised, but not confidently, by SCW.

 

Getting a little gear noise when cruising, so might try the LSD stuff down the track.

 

Other than that, not much to report.

[RallyRed]

Good feedback.
Re: the oil. Not sure why people want to suggest LSD oil in a Tru Track?
Always thought the LSD oil was about friction modifiers/ or lack of same...to make it work wth the clutches/ cones inside a LSD?.
Tru tracs do not have clutches.
Happy to be corrected, and I guess he's a diff shop, and I'm not.

Edited by RallyRed, 05 April 2024 - 04:06 PM.

[salamiman]

Rally, did you have any noise from your trutac when running one?

 

Also be interested on anyone elses thoughts on the correct oil for a trutrac?

[RallyRed]

No mate, silent.
That said, It was only in service for 6m or so, before we went for a Detroit Locker instead.
I have found, clearly, that for track use/ high cornering speeds, unless the rear axle assembly is baffled, the CW & Pinion will get oil starved and get noisey real quick, regardless of the centre being used.

Edited by RallyRed, 05 April 2024 - 07:55 PM.