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Bonnet Clearance With Rb30det In Gts25t

Lithium

By Lithium,
in Engines & Forced Induction

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Lithium Grand Master

Lithium

Posted
Posted (edited)

Hey guys, sorry if this has been covered somewhere - I have done quite a bit of trawling and there is HEAPS of information on building RB30DETs and even information on squeezing the RB30 into an R32 in such a way as to not get clearance issues but I've not found anything specific on the R33 (which obviously has a different engine bay and factory deck height), and I figure there are bound to have been people who have tried here so someone should be able to provide an easy yes/no answer and I am sure someone else would do the same search.

Are there any clearance issues when putting an RB30 bottom end under the stock RB25 head in an R33 GTS25t when retaining the stock plenum/cross over pipe, are there any basic mods to make it work, or is getting a forward facing plenum imperative to making it work?

I quite like my turbo setup etc, the stock plenum and exhaust manifold are definitely capable of making the power I want... I am more looking at the 3litre for reliability (addressing oil control and having a fresh engine as well as the fact the 30s are tough) as well as the obvious huge boost in power delivery of having a 3litre are the big motivators for looking into this as the car is primarily daily driver vs drag/track. The added cost of having to change manifolds, piping etc would sway my decision on whether I'd go RB30 or not.

Cheers,

Lith0r.

PS, I just realised/remembered there is an RB30DET area and this probably should be in there but can't move the post myself ;)

Edited by Lithium
Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

yes there are clearance issues. Yes i have had to change stuff to mine to make it fit with the stock plenum.

No i wont tell you if you cannot search, paypal me $100 and i will give you the information.

Bet that search button is looking like a better option now ?

Lithium Grand Master

Lithium

Posted
  • Author
Posted

OK my apologies, I could swear I had read the RB30DET guide and that it talked about space in an R32 GTSt - not an R33. I had another read and it answers my questions perfectly. Maybe I did something blonde like interpreted a useage of "GTST" somewhere as meaning an R32, over here R33 "GTSt"s tend to be referred to as "25T"s. Either way my bad.

Cheers for the help guys

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
OK my apologies, I could swear I had read the RB30DET guide and that it talked about space in an R32 GTSt - not an R33. I had another read and it answers my questions perfectly. Maybe I did something blonde like interpreted a useage of "GTST" somewhere as meaning an R32, over here R33 "GTSt"s tend to be referred to as "25T"s. Either way my bad.

Cheers for the help guys

Search works quite well then :banana:

I will PM the mods and tell them its working again

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