Big Power. What Are The Cons For Over 300rwkw

[JB]

Valve spring and clutch for me at 260rwkw

I am now over 300rwkw (310rwkw) but have dialed it back down to 300rwkw as I have concerns in the strength of the T5 box.

I will keep you posted fingers crossed. The rest of the car is running stock components, so far so good.

To be honest JB I dont think that the factury 6 speed is any better. Sometimes I get gear crunching going into third. I thought it was just my driving but my brother has the same problem when he drives it. I dont think the 6 speed can handle much more power but I could be wrong.

Yeah, I am not sure myself

All I know is the T5 is not overly strong with various members getting different results out of them.

I was looking at a T56 as Ben from Mal Woods and others believe that it will hold the power alot better than the T5.

Bruce is now running 390rwkw and has installed a T56 and it seems to be handling that power well, so from that and a couple of othersw experiences with the T56 I would say it's the next step above the T5, as No one has got past 330rwkw with the T5.

With that being said the T56 whilst seeming to be able to handle the power better than the T5, still has very similar issues with bearing noise, not wanting to go into gear and so on. Maybe just a trait again of some of the ford put in their cars.

If I was you try changing your gearbox oil to Castrol Transmax Z, this will no doubt improve your shift and I would suggest help it engage the problem gear you are having. This is what most people including myself have done.

There is a thread on which is the best oil to use under Mal Wood Autos, have a read.

Thanks for the advice JB.

I might get the mechanic to drop the gearbox oil at the next service and try out the Castrol.

All your questions should be answered in this thread:

http://www.fordxr6turbo.com/forum/index.ph...ndpost&p=189914

Cheers

[badxr6]

No one has got past 330rwkw with the T5.

I think that APS' current test mule HGAG falcon xrt still uses the T5 transmission and it has over 500rwkw. I believe they mention the secret is with the clutch but can't confirm. Perhaps this car is only used for dynos and testing so it doesn't take much harsh treatment...

Have you tried a heavy duty clutch JB?

hey Steve, that car is an auto form the last time I checked? Happy to be corrected.

Then again if he is running 500rwkw odd then with a T5 I am very interested on how he has!

Mate have already got a cushion button clutch in, the factory one was slipping at 260rwkw and scorched the flywheel. The one currently in will be coming out in the next week or so as the centre is too strong for the car. Another similar setup will go in with a softer centre.

Pic of what is currently in the car.

same as mine jb and if you only doimg dynos the t5 would be quite ok

[badxr6]

So far we’ve heard that the internals can’t cut it, yet we are seeing more and more cars push over 330rwkw and they still appear to be running OK.

well I had to do the clutch after a couple of months with 290rwkws and then when it was at 330kws the gearbox got noisy and lasted 12 months unill I got it upto 360  then she broke third gear so in went the t56 and up the power to 397rwkws and yes the engine is still stock but I will be taking it out in the next 2 weeks to put some rods etc. so it will be interesting to see how she looks inside

Thanks Bruce. Be sure to post your findings on the condition of the engine internals.

How do you drive your car? Hard or easy?

get driven hard in second and third on the steet and then hard at the drags

[Geeseman]

Anyone else with experience of part failure or excessive wear?

[OwnaXR6T]

stay tunned for a post from me regarding something else that people are over looking maybe. It nothing to do with engine, depending on word from melbourne where the work was done. It is meant to be garenteed. And if they don't cover it I will be revealing who they are and what has happened to insure noone uses them for this type of upgrade.

[JB]

stay tunned for a post from me regarding something else that people are over looking maybe. It nothing to do with engine, depending on word from  melbourne where the work was done. It is meant to be garenteed. And if they don't cover it I will be revealing who they are and what has happened to insure noone uses them for this type of upgrade.

Keep us posted mate

[Pretzel]

Anyone else with experience of part failure or excessive wear?

<{POST_SNAPBACK}>

Have had Clutch fry over 300, and then at 300 the T5 had become very second hand !

Driven relatively hard all the time though !

Pretzel

[Geeseman]

Thanks Pretzel

Yes, Owna, keep us informed as to how the 'part' in your car goes and if you are able to get it fixed under warranty.

So far it appears that the main problems with these cars over 300rwkw are:

Engines - Potential for throwing rods. Dependant on how hard car is driven and under what conditions

Gearbox. Autos and manuals definately need work over 300rwkw. We understand some have gone the T56 route while others still use the T5 with better clutch with varying degress of success.

Btw auto owners, we have a repairer in sydney that will soon supply a new gear set in addition to band upgrades. This should allow the autos to make way over 300rwkw

[Johnny G]

Bit of an extension on the thread..... but... would be great if we could post up the auto repairers / builders worth their salt in Bris / Syd / Melb.... and what they have up their collective sleeves with new bits and ideas that make the 300rwkw barrier "not so much a worry" in terms of abliterating the innids of the box in question. Mine's just turning over 25Kk's, and has that noisy sad sound associated with ............ and yes - it's booked for an fluid change. Can hardly wait to see what's in it.....

As another thread suggested recently - auto's are strictly 20,000 k fluid changes.

[cdm]

At what point are people changing the internals? And what to? Are people using the rods from the gas engine or going custom aftermarket? What about forged pistons? When and how much?