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The 4 Door Gts25T. With An Rb30E :/

Cheddle
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Cheddle Enthusiast

Cheddle

Posted
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Thought id share my project for both sharibg experience and gaining some.

I have a s1 4 door 33 that started life as an automatic 2.5t. It was converted to manual and imported in 2000. Since then whilst in the hands of the previous owner it snapped a rod and an epic 30det was built for the car. After several years of bad luck and skids the previous owner decided to part it out, i brought the rolling shell minus box, engine and radiator.

I have a s3 manual gx 31 that is my daily and shortly to be my donor car...

Next week im putting the rb30 box and engine into the r33... As a strictly budjet project.

Ill be posting up some pics as i go as well as sharing pointers about.interchangability that i come across duribg this rare and retarded conversion... With 4.36 diff gears however im sure it will be interesting.

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toffy Veteran

toffy

Posted
Posted

aha , it was you that bought it! , nice :) , are you planning on rego? might want to check with authorities before putting the rb30e+t? in to make sure it can be done . A friend of mine tried putting an older motor in a car he was building and found he couldn't get it passed for rego ( just a heads up :) )

Cheddle Enthusiast

Cheddle

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Technically patrols came with rb30s untill slightly after the r33 was made... So it should be ok on paper... Its currently regoed with a 25det. I dont plan on changing it to be honest. If push came to shove it could be engineered without a problem. I had an engineer approve a 95 vs commodore with an rb25det s1 engine from an earlier 33.

Conversion starts on sunday but ill put up some pics soon.

At this stage i dont think ill turbocharge however ive been dreaming of supercharging, response and torque is the aim here but so is keeping to a very low budget. Have to see if it spins the 245`s on the back lol.

toffy Veteran

toffy

Posted
Posted

Ahh yep , didn't know it was still rego'd , all sweet then! :ph34r: . rb30 will love 4.3 diff gears and 245s! , i doubt you'll need a supercharger for response . I was gunna buy this car myself but couldn't find anywhere to put it (when i did it was too late :P ) . what you doing with the leftover bits of r31?

Cheddle Enthusiast

Cheddle

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Ahh yep , didn't know it was still rego'd , all sweet then! :ph34r: . rb30 will love 4.3 diff gears and 245s! , i doubt you'll need a supercharger for response . I was gunna buy this car myself but couldn't find anywhere to put it (when i did it was too late :P ) . what you doing with the leftover bits of r31?

the left overs are being given to Phil Parnell for payment, hes the one doing the conversion for me

Cheddle Enthusiast

Cheddle

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conversion under way:

exhaust, im please to say, lined up perfectly

gearbox cross member was not interchangeable

tail shaft was not interchangeable

r31 radiator does not fit, its too tall.

all ancillaries bolted up, inc air con.

wiring yet to be done

XRATED Veteran

XRATED

Posted
Posted (edited)

Ha ha ha... nice one.

Throw a lumpy cam and some more compression at it (along with the right exhaust) and get a really unique sound for a 33.

Good luck

Justin

Edited by XRATED
  • 2 weeks later...
Cheddle Enthusiast

Cheddle

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Updated: r33 n/a tailshaft fitted, so did the standard r33 gearbox crossmember. The wiring was litterally 4 wires at the ecu side using the whole r31 engine loom with the r33 relays. Ended up chopping off the r31 altenator plugs and using them on the r33 body loom.

I have not hooked up the speedo or tacho yet but i have a jaycar speedo corrector mk2 that im hoping will work to correct the change in diff ratio.

Ill post up some vids and pics over the easter break

Cheddle Enthusiast

Cheddle

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update: speedo worked with the speed correcter, massive 40% difference due to gearing! lol simply used 12v+ from r33 gearbox loom, made an earth and then ran the signal wire to the cabin to the adjuster and then straight to the back of the dash. FYI, for those using a Jay car speed correcter MK. 2 with an r33 you need to use the 8.2v JP1 setting and then use the AC JP5 setting... should work a treat!tacho cannot be driven by the stock tacho output from the r31 ecu, i will most likely piggy back it off the CAS or i will make some kind of relay style circuit to convert the signal to run the tacho

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Cheddle Enthusiast

Cheddle

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Im happy with how it performs. With the short gearing its nice and zippy. Feels very flat but as soon as you stomp it the powers there. Took down my mates auto s-vz no worries. Im thinking of keeping it na but tuning it to push the peak torque up the revs a bit just to make it a bit more powerful. First thing ill be doing. Besides a general tiday up and maintenance is a nistune ecu and some dyno time.

XRATED Veteran

XRATED

Posted
Posted (edited)

Before you get it tuned bang a cam and extractors in it.... One of my r31's many many many years ago, we threw a cam and chip (allready had extractors) at her and she really came alive.

I recently saw a shot on here somwhere of a rb25de manifold with twin tb's.. Similar to the 5lt walkinshaw manifold. There may be something in that too.. I'd be tempted to go two 50mm vg30 tb's. Or even try adapting a gtr intake set up to the 30??? Very unique either way.

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You comming to the track day?

Cheers

Justin

Edited by XRATED
Cheddle Enthusiast

Cheddle

Posted
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Posted

that looks a whole lot like Skitr31's engine bay! 150rwkw running an rb25det tune... noice

at the moment cash is tight so i wont be coming to the track day unfortunately.

im unsure what way to go yet, boosted, n/a 30e head or n/a 25de head... either way the car needs a tidy up before i start blowing wads of cash on making it go fast!

XRATED Veteran

XRATED

Posted
Posted

30e+t , if your aim is under 300rwk , nice and simple (and cheaper )

That's what I said at the track day... today.

Nice simple precision billet 5557 with wastegate and manifold adapter. Nistune, VL-T injectors etc...

J.

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