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Rb Into A 30

infulleffects
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OUTATIME Community Regular

OUTATIME

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dropped an rb20 into my r30 the other week. used rb30 (r31) engine mounts and bolted right up. used the l24 gb xmember and that bolted up. just had 2 bend it slightly to line up with the studs. bit dodge but all gd. other option is 2 make a custom one.

and 4 the tailshaft i used a c210 manual shaft with the l24 centre bearing housing and that all bolted up fine.

now have pulled it all out again to put it into a dr30. all same but have 2 make custom gb x member cos fj mounts r way off. also used the r30 l24 engine xmember...

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skybt1 Community Regular

skybt1

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i modified engine mounts and made a gbox x member so everything clears to pass engineers.

engine will fit with standard r31 mounts but has no clearance with the l24 engine x member.

If you want to do it just to thrash around its easy, if you want to do it properly you need to make mounts.

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infulleffects Rookie

infulleffects

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Um it has currently got an l20et in it.

Am wanting a bit more power that it can offer, so dropping a 25det in.

The 17s are DTM frifts, 8" front 9" rear, and the other photo has the old 2 piece hartgers, 15 by 7"

Yea had guesed that I will need to do a custom gbox mount, but if I can get away with the rb30 engine mounts that would be good. Was also thinking of just getting a one-piece driveshaft made up maybe, funds permitting.

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r30kansai Collaborator

r30kansai

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Both my conversions were previously L20ET, I didn't change the mounts or crossmember or Gbox crossmember, everything bolts straight in using original mounts, just have to get the driveshaft shortened.

The L20 crossmember and mounts are different to the L24. Assuming the RB25 uses the same cross and mounts everything should bolt straight up.

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OUTATIME Community Regular

OUTATIME

Posted
Posted (edited)

i just used the l24 (manual) 1, on rb30 box. was massive budget conversion and just used what parts i had. i did elongate the engine cross member where the mounts bolt on so the sump would have clearance.

Edited by OUTATIME
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r30kansai Collaborator

r30kansai

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Does anyone know if the RB25 uses the same mounts as an RB20 for engine and gearbox, I think they do but I can't confirm it.

I have heard that the FJ20 models do need a change in cross members.

It was covered some time ago, a quick search should bring it up.

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infulleffects Rookie

infulleffects

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yea all rb stuff is interchangable and has same mounting I believe. Am going to use an rb30 box anyway since 25t ones are massively overpriced. Well until it blows anyway.

Well I may have to take some pics of the conversion then when I do it, just for future reference.

How do the 30s go with the rbs? Being a lot lighter than 32s I could imagine quite well...

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Factory 5 Mentor

Factory 5

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Well its definitly easier to work on with an RB, plus parts are easier to come by, more aftermarket parts available, plus a few thousand more in production than the L20 so theres HEAPS of second hand shiz about.

when you look at the weight of the R32, R33 and the HR31, then the weight of the R30.... the Kw per kg factor comes in and the R30 wins, as long as you have the brakes, suspension and tread to match.

my mates 190kW oz R31 haf a RB30e+t, whent like the clappers, lit up in nearly every gear, looked great, BUT had stock brakes and shit lowered springs, so in a straigh tline it was insane, as soon as ya needed to slow down or take a corner, either locked up, got sideways, or brakes faded

so make sure you do the WHOLE deal, not just under the bonnet!

seeing as i just got offered a complete RB25de setup for $400, im considering it thats for sure...

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infulleffects Rookie

infulleffects

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well its got d2s all round atm, the 4pots and 280mm rotors up front, and wen the engine gets dropped in I will do the 2pots on the rear, so stopping and cornering should be alright. only thing that may be a little low is the tread width on the rear...only 235 atm.

planning on getting adjustable castor rods, and doing all bushes too.

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ydr030 Mentor

ydr030

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Posted
  r30kansai said:
Does anyone know if the RB25 uses the same mounts as an RB20 for engine and gearbox, I think they do but I can't confirm it.

I have heard that the FJ20 models do need a change in cross members.

It was covered some time ago, a quick search should bring it up.

same 4 engine, and if u go 20 box to a 25 box, same. ive said this before and dont wwant to cause another dispute. fj cross member way off. mr 30 cross member fine. o and 30s wit rbs go alot better than ne L series motor.

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works 510 Experienced

works 510

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Posted

I recently just starting doing a rb25 convo into my ceffy and have found the 25 mounts to be different to the rb20 mounts

(I had to use the rb20 mounts as the 25 mounts were going to sit the motor on a funny angle)

But at the same time, I pulled a rb25de out of a car the other day and the mounts looked identicle to my rb20det mounts...

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infulleffects Rookie

infulleffects

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So... does anybody have the pinouts for the l20et ecu handy that they could email to me? And maybe the 25det ones if someone here has them for some reason, but I will ask in the later model section if no-one does.

The engine should be arriving later this week....yusss :P

Cheers guys

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