Rb30det/tt Gtr Conversion Thread

[Marko R1]

not sure what u would expect @ 20psi, however i made 405awkw @ 23psi = approx 450rwkw

without my cams and porting by proengines i'd be down maybe 40awkw

[purpleskyline]

thanks for the heads up on the plate, ( proengins)

well had a go at making a wedge, first attempt nearly lost my finger, with the grinder.

but got there in the end, god 2mm one side 10mm the other side then drill out the center to fit over the thread.

but all on now and straight, all gaps the same to water pump studs 4mm, so well chuffed.

piccy

[purpleskyline]

has anyone used these turbos

T70 TURBO VL MANIFOLD 50MM WASTEGATE

sold on ebay. just wondering if that might be better than my hks2530

[purpleskyline]

anyone on here use these

[T04GTR]

so, rd28 engine mounts solve the bonnet clearance issue? or is there something else? ive tried reading it all but no definative answer.

[shanef]

you cant use any other engine mount dave, because as it is there's 2 parts of fook all clearance between the bottom of the diff and the cross member. i posted a pic in here somewhere showing how close it sits

[bubba]

Yeah with the sump adapter there's not a whole lot of clearance to the cross member (I've only worked with an R32 GTS4 but for all intents and purposes should be the same).

[Marko R1]

so, rd28 engine mounts solve the bonnet clearance issue? or is there something else? ive tried reading it all but no definative answer.

if u are enquiring about an rb30 in a gtr, u need to use the same mounts. u can slot the mount holes but not recommended due to lack of clearance

[T04GTR]

ok cool. just gotta figure out how im going to fit my s372r borg warner turbo in there...

[shanef]

forward of the shockie tower and make the mani as low as possible

[T04GTR]

but..

[N1GTR]

lol i gain an extra 200kg (stagea) over a gtr but my bonnet shuts without an issue with covers on and twin turbo pipe on I'd still rather lose 200kg and need less power lol.

I have been thinking about running twin gtrs turbos now instead of -5s, i think they are -10s from memory? I remember someone on here runs them on a 30 setup and wondering what the drivability is like? i want around 500hp at wheels mark on 18-20psi. Im running a freshened bottom end but still stock rods and duratech cast pistons, so still around the 8:1 comp ratio. I dont care if the thing blows to bits i wanna see how long it will last My head is stock 26 with no port work and stock cams at the moment which wont help either, but bolt in cams are always a future option.

Ive got GTRS's, i want to swap them for dash 5's in the next month or so.

What rear does your set have?

Drivability is pretty much perfect as Marko said. Only things id change are turbos and cams

ok cool. just gotta figure out how im going to fit my s372r borg warner turbo in there...

Harden up mate, iraqi sand dune nissan patrol racer style right out the bonnet level with the roofline

[Roy]

but..

...i cant see a turbo in that shot Dave, interesting that you have chosen to go NA on your RB26/30. FARK ME!

[cactus]

Maybe someone get shed some light on my current set-up and the issues I am having...

Im running a built RB30 bottom end with standard 25 vct head. The old set-up was running a GT3082r (0.82r) with 6 boost and supporting mods and made 280rwkw @ 17psi. This is through a built 5speed auto, fully manualised with 4500rpm stall.

I then changed to a GT35R with the same mods. On 11psi, the car made 246rwkw @ 7100rpm. We then upped the boost to 18psi, however the car only went 260rwkw and stopped making power after 6000rpm (sharply).

Any ideas what this could be? A few people have mentioned valve float but I also dont know how to verify this.

[bubba]

What size rear housing on the 35R and what size exhaust? cat? sounds like a restriction..

[cactus]

What size rear housing on the 35R and what size exhaust? cat? sounds like a restriction..

.82r ... its the exact same housing as the older 30R but just machined out to fit the larger exhaust wheel. No cat, just a muffle towards the end of the system (being a 3" mandrel).

[jet64u]

Amazin how far Rb26/30's come since this thread was 1st opened,

[jet64u]

Looks tuff

[Marko R1]

What size rear housing on the 35R and what size exhaust? cat? sounds like a restriction..

hubba bubba!!! that avatar of yours is a MAJOR distraction, fark me

[bubba]

hubba bubba!!! that avatar of yours is a MAJOR distraction, fark me