Rb30det Rx7

[SICRX7]

Hi everyone i just had this idea to put my rx7 on a skyline forum haha im an idiot but anyway this is my RX7 S4 with a RB30DET engine it.

building for drift hopefully to be professional one day

Here are the specs:

Rb25 head, o-ringed, ported, bigger stainless valves, heavy duty valve springs, camtech cams(will put specs on picture)

adjustable cam gears (no VCT)

RB30 bottom end

o-ringed

forged CP pistons (8.5 comp)

spool rods

race bearings

copper head gasket

custom sump

oil filter relocation/cooler kit

custom engine and gearbox mounts

greddy (copy) inlet manifold

80mm thottle body

high mount turbo manifold

50mm external wastegate

To4z turbo (coming soon)

3 inch dump pipe then split into two 2-3/4 inch with two 4-1/2 inch canons

1000cc injecters

big fuel rail

1000hp fuel pressure reg

twin bosch 044 fuel pumps

1/2 inch fuel line

57 litre fuel cell

battery in boot

microtech LT12S

6 bosch coils seperate from engine

R33 gtst 5 speed

rx7 s4 turbo locker diff

coilovers

and other things i just cant think of at the moment

this is a 3 year long project so far and hoping to finish in a couple more months, it started as a s2 rx7 and i changed shells 6 months ago.

im currently in progress of painting it candy apple red, ill add some more pics after its finished painted. anyway here are some pics let me know what you guys think cheers.

[NZM.031]

thats a fantastic effort... but the only thing that comes to mind is WHY??? why would you take a light weight and perfectly balanced car like the rx7, take out the lightweight 13b capable of ridiculous power, and drop in a big heavy cast iron rb30??

[Just_Rb]

thats a fantastic effort... but the only thing that comes to mind is WHY??? why would you take a light weight and perfectly balanced car like the rx7, take out the lightweight 13b capable of ridiculous power, and drop in a big heavy cast iron rb30??

RELIABILITY

[Smoky]

RELIABILITY

RELIABILITY

Edited January 13, 2010 by Smoky

[SICRX7]

RELIABILITY

haha yeah i love rx7's and love rb's so yeah got it both ways lol plus a s4 rx7 is not light and needs torque dont get me wrong i still love rotors tho

[lawler]

Hell yeah thats awsome

[NZM.031]

i can dig that.. should hammer nicely.

RELIABILITY

coz rb's dont have any oil control problems causing catastrophic bottom end damage.

[lawler]

i can dig that.. should hammer nicely.

coz rb's dont have any oil control problems causing catastrophic bottom end damage.

While yes they do its easy enough to fix/reduce it.

Rotarys on the other hand running on 2 stroke helps but still you would have to rebuild it a heap making good power

[Noddy]

it will be interesting to see how this handles with an RB up front.

[NZM.031]

While yes they do its easy enough to fix/reduce it.

Rotarys on the other hand running on 2 stroke helps but still you would have to rebuild it a heap making good power

you should have a read of the "why do rotories suck" thread.. they arent as bad as the rep they have for being unpredictable and unreliable.. its all about calculations and driver care.. no different to any car or engine.. plus an rb26 rebuild can cost anywhere from $10000 to $100000.

its easy enough to fix/reduce a rotoray. rotors can be pulled apart, have the apex seals replaced, and put it back together like a sandwich. they have advanced greatly with the seal technology and dont have nearly as many dramas. you may have to replace the seals 5 times to the RB's 1, but its not that hard or expensive and the rewards of the rotary engine make it worth it.

making good power, and making usable power are 2 different things, you can have a ball breaking rotor that is on the limit and gets constantly flogged on dynos/strips.. or you can have a more sedate, well rounded street package that can have no dramas at all and is still ball breaking, but nowhere the limit of explosion.

it all comes down to engine building, tuning, and purpose.

[SICRX7]

what sort of power will i be making with a garrett to4z ball bearing turbo? because i want to make 600+HP atw, i cant go too big on the turbo because the car is for drift and dont want too much lag. GCG turbos said it wont get the power im after with a to4z but said i will with a t51r but that is too big and have too much lag wont it?

Edited January 14, 2010 by SICRX7

[Simon-S14]

600 hp and lag is a given mate. if you want to drift it go for something more sensible which will give you less peak power but more response and midrange torque.

[SICRX7]

yeah i know mate but i just want the figures on the dyno because thats what i built the engine for

[NZM.031]

so the car is for drift but the engine is a dyno queen??

for drift, a gtrs, 2530, td06, td07, etc, will all be fine. the rb30 should be able to spool up a bigger turbo nearly 1000rpm earlier, so a t51r might not be such a silly idea.. if garrett said your t04 wont make the power, than i guess they are the ones that would know.. but they make 400hp on a rotor, so maybe they dont know.

you cant have both worlds, you either want a ball breaking dyno queen, or a drift car that you can actually get out and thrash.

[SICRX7]

so the car is for drift but the engine is a dyno queen??

for drift, a gtrs, 2530, td06, td07, etc, will all be fine. the rb30 should be able to spool up a bigger turbo nearly 1000rpm earlier, so a t51r might not be such a silly idea.. if garrett said your t04 wont make the power, than i guess they are the ones that would know.. but they make 400hp on a rotor, so maybe they dont know.

you cant have both worlds, you either want a ball breaking dyno queen, or a drift car that you can actually get out and thrash.

yeah i understand i might just go with a to4z because a t51r would be overkill and have too much lag

[Mandingo]

Madness. Love it.

But seriously, area under the curve is much more important then having X amount of power for drift.

What inlet manifold do you run bloke?

Edited January 30, 2010 by Flipmo

[SICRX7]

Madness. Love it.

But seriously, area under the curve is much more important then having X amount of power for drift.

What inlet manifold do you run bloke?

hi buddy im running a greddy copy with a 80mm tb cheers mate

[SICRX7]

Madness. Love it.

But seriously, area under the curve is much more important then having X amount of power for drift.

What inlet manifold do you run bloke?

hi buddy im running a greddy copy with a 80mm tb cheers mate

[SICRX7]

Madness. Love it.

But seriously, area under the curve is much more important then having X amount of power for drift.

What inlet manifold do you run bloke?

im running a greddy copy with a 80mm tb

so i take it your a drift nut too

[r33_racer]

I farken hate you mate! Ive dreamt of doing that exact same project for so long. Ive always been torn because i love skylines as well.

Good luck with it though. Its looking awesome and im insanely jealous!

Question though? Have you beefed up those engine mounts anymore since the first pic of them. Where the two halfs join at the bend. It doesnt look to be very reinforced (gusseted) for the sort of weight that will be hanging off them. I know those drift cars can bounce around a fair bit on tracks and also when they run off the track and the hard suspension wont help it much either (though i am assuming you will be running hard springs as thats what most do when running *JAP* spec drifting coilovers.