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Author Topic: R25/R28/R30?  (Read 7106 times)

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cem_devecioglu

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Re: R25/R28/R30?
« Reply #15 on: 15 February 2012, 22:26:48 »

must admit I cant drive miggy in relax mode after conversion.. its always like I escaped from hell.. hope you wont ;D
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JamesV6CDX

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Re: R25/R28/R30?
« Reply #16 on: 15 February 2012, 22:28:27 »

You'd have to declare it as a modification - 'most' mainstream insurers will let you have a couple of modifications (though they'll charge accordingly depending on your age), or switch to a specialist like Adrian Flux/Sky/etc

I'm going to enquire tomorrow.... :y
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albitz

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Re: R25/R28/R30?
« Reply #17 on: 15 February 2012, 22:42:32 »

Please report your results James.It wold be interesting to know how much difference it makes. :y
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tigers_gonads

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Re: R25/R28/R30?
« Reply #18 on: 15 February 2012, 22:47:27 »

I've been running a R25 / 3.7 diff with a 3ltr for the past 2 years without problems.

Averaged about 25mpg on petrol / 22 on lpg with 90% of my time in traffic with a heavy load in the back.
Still get 28+mpg at 75 ish on a motoway.

Hth
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JamesV6CDX

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Re: R25/R28/R30?
« Reply #19 on: 16 February 2012, 09:42:10 »

just one question. I note the clutch kit part numbers are different between 2.0 and 3.2 etc. Does that mean the flywheel etc from a 2.0 donor would be no use? Cluch plate on 2.0 is 220dia, and 240 on 3.2.....
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cem_devecioglu

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Re: R25/R28/R30?
« Reply #20 on: 16 February 2012, 10:06:25 »

I used 2.5 vectra single mass flywheel from F25 .. (mine is 2.5)
 
dual mass flywheels and kits are expensive.. imo there may be someone using 3.2 manual in the group ..
 
so they may be able to tell..
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serek

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Re: R25/R28/R30?
« Reply #21 on: 16 February 2012, 11:30:04 »

just one question. I note the clutch kit part numbers are different between 2.0 and 3.2 etc. Does that mean the flywheel etc from a 2.0 donor would be no use? Cluch plate on 2.0 is 220dia, and 240 on 3.2.....

need use parts from v6 as propshaft on 2.0 different too
2.0 flywheel wont fit V6

twiglet

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Re: R25/R28/R30?
« Reply #22 on: 16 February 2012, 12:02:24 »

Is this free manual box up by Swindon by any chance?  ::)

Yes mate.  I still haven't been able to organise collecting it, so it's yours if you want it?
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JamesV6CDX

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Re: R25/R28/R30?
« Reply #23 on: 16 February 2012, 12:07:24 »

Is this free manual box up by Swindon by any chance?  ::)

Yes mate.  I still haven't been able to organise collecting it, so it's yours if you want it?

Only if youre certain mate? That would be a huge help. Am passing Swindon Sunday!
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twiglet

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Re: R25/R28/R30?
« Reply #24 on: 16 February 2012, 13:22:12 »

Is this free manual box up by Swindon by any chance?  ::)

Yes mate.  I still haven't been able to organise collecting it, so it's yours if you want it?

Only if youre certain mate? That would be a huge help. Am passing Swindon Sunday!

Absolutely mate.  I told Joff I'd collect it weeks ago, and I feel bad that I haven't been able to.  If you can make use of it mate, it's all yours.

Can I leave you to arrange things with Joff?
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It doesn't matter how far you push the envelope, it will always be stationery...

JamesV6CDX

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Re: R25/R28/R30?
« Reply #25 on: 16 February 2012, 15:34:53 »

Cheers - PM sent to Joff!

With regards to the electrical side of this work... I understand the 3.2 differs to what's in the guide, being DBW and all that...

How is the ignition timing retard, starter inhibitor, and other such electrics set up, to configure the car as a manual?

Has it been confirmed whether Tech2 input is required, what changes need to be made, and if Tech2 is capable of doing this?

Cheers,
James
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bootie

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Re: R25/R28/R30?
« Reply #26 on: 16 February 2012, 15:52:40 »

R25 is supposed to be fine in a 3.0/3.2. Only difference was shot-peening of the gears on the R28.

It's not like an auto box where the clutches have to be sized for the torque output.

Are these boxes similar to the Omega A (Carlton) as they were named the same R25 and R28. Named for max BHP they could take. ie R25 = 250 brake. The only difference was, as stated, the R28 was shot peened to enable it to take up to 280 brake.

I'm guessing that all three on the Omega are hydraulic clutch operation. On the Carlton the R25 was cable then you had an in between which was designated R25/28, same internals as the R25 but with hydraulic clutch, then the R28 which was hardened gears and hydraulic. So would that make the R30 capable of dealing with up to 300 brake?
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Kevin Wood

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Re: R25/R28/R30?
« Reply #27 on: 16 February 2012, 16:40:25 »

My understanding is that the designation is torque in Nm, i.e. 250 or 280 Nm. A 3.2 puts out about 280 Nm of torque, IIRC.

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bootie

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Re: R25/R28/R30?
« Reply #28 on: 16 February 2012, 17:19:26 »

 :-[ yes of course torque, not BHP.......how embarrassing.... Thanks for keeping me right :y
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JamesV6CDX

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Re: R25/R28/R30?
« Reply #29 on: 16 February 2012, 19:26:11 »

So I just need to firm up the electrical aspects - the mechanical ones are otherwise no problem :y

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