Rb25 Conversion Sitting High

[ti2l]

Hi all...

sorry if this topic has been covered but had a quick search and nothing popped up.

so i have had the RB25 in the car for a while and the motor is sitting fair bit higher than the RB20.

Have swapped to an rb25 cross member and mounts and still sits high, cant get strut brace on, bonnet has been raised at the rear prior to conversion so it still closes..

any suggestions on how to drop the motor as i heard 25 cross member should sort it out.

cheers

Brenton

[beamstas]

Forward facing plenum?

[ti2l]

na not yet but more concerned about bringing the motor down lower than just for the sake of throwing on a strut brace.

only using the strut brace as a guide

[blind_elk]

I have this same conversion, and everything fits fine. Which engine supports did you use?

[ti2l]

i am using the 25 engine mounts, 25 mount brackets and 25 cross member...

[astrotristan]

you can use 39mm range rover engine mounts, they are available thru repco

however the sump might sit quite low...

hmmmm

[ti2l]

range rover mounts... havent hear of that one before.. worth a shot...

so will they bolt up to the 25 mounting brackets and cross member?

[astrotristan]

uuummmm pass...

i know that people use them to fit rb25s into 180s, i havnt done the conversion myself

however one of my mates is doing the conversion, he might be able to shed some light on it when he gets on the net tonight

[ti2l]

yeah if you could find out that would be good

[The Dan]

Just use the RB20 rubber mounts and elongate the holes on the cross member so instead of two holes, there is a long slot. Make sure you get the engine close to central when going back in. That should drop the engine by 20mm.

Or put your 32 crossmember back in and just use the RB20 mounts with that.. EASY

[blind_elk]

Yes, I think I am using the RB20 rubbers and RB25 legs. But no mods were necessary to get them to fit together.

[ti2l]

was running the rb20 mounting brackets, cross member and mounts and motor was sitting higher than it is at the moment so that a no go...elongating holes may be the option

[JonnoHR31]

use 32 everything and it'll sit exactly where the stock 20 does. always use the mounts that go with the car, not the engine

Edited February 1, 2010 by JonnoHR31

[ti2l]

yeah that was my assumption and how it was when i did the conversion...... except the motor was sitting high...

[niran]

hey man

i am also using rb20 mounts for everything, mine fits fine.. for the gearbox i used the rb20 mounts also however ive heard there are 3 types (A,B,C) im using the type b ones and they fit exaclty.

Edited February 1, 2010 by niran

[ti2l]

have heard there is variations on the mounts and cross members for the 20....

i am still running the 20 gearbox... and as said previously was originally running the 20 cross member and mounts and brackets.. but motor was sitting really high with this... was told the 25 cross member and mounts will sit lower... put it in and not so

heard someting about cefiro cross member but unsure on truth in this

[The Dan]

You are doing something wrong. Your 32 is the same as every other 32 on the planet. Use the Alloy mount brackets or the steel ones from the 20, it doesn't matter. Just make sure you use the RB20 rubber mounts and it will fit properly. The block and head height is identical.

Where is your strut brace touching?

[blind_elk]

Silly point, but the legs (between block and rubber mount) are side-specific, ie a RH one and a LH one. You haven't swapped them have you?

[The Dan]

Silly point, but the legs (between block and rubber mount) are side-specific, ie a RH one and a LH one. You haven't swapped them have you?

They don't go on the other way.

[ti2l]

nope nothing is on the wrong side....

find it kinda difficult to do something wrong with it dude....

my thoughts are as previously stated with 3 different types of engine mounts i may have one that sits differently..

when i was speaking to a few mechanics (well known workshops) before i did the conversion they told me that its not uncommon for them to sit high for some reason and it just seems to vary from one to the otehr.. he didnt understand it either.

as i said previously i have tried using both combinations ie all 20 bits and all 25 bits...

both sit high... the strut brace sits on the intake plenum and sits around 10mm or so above the strut tower..