Interesting Build - Quest For Mid 9 Second Streeter

[Martin Donnon]

An interesting build which we have been commissioned for. Take 1 x well used, 70,000km 09 ADM GTR and build it into a reliable daily driveable and mid 9 second package. First up to strip the car....

Dropping both engine and transmission out of the vehicle its time to start stripping them down and begin the process of making something ultimately more power and much stronger. Already this GTR with a small turbo upgrade on 98 octane fuel put down 385kw at the rear wheels

The stock engine although have a few kms under its belt was near perfect internally, with not a mark on the bores...which kind of makes the whole 80,000km rebuild thing look like the internet myth that it really was. This old girl looked like she could have gone another 100,000km without batting an eyelid

The new powerplant is a Greddy 3.8 litre combination we have put together with forged pistons/rods, head studs, and HKS head gaskets. This engine should have no trouble supporting 25 - 30 psi of boost pressure reliably - should it be required.

On top of the tough bottom end we are putting a set of Stage I cylinder heads, lightly ported, cleaned, and freshed in line with the rest of the engine.

Next we will finish the engine and build a tough and reliable transmission to hold the 550+rwkw this combination needs to put down

[domino_z]

Awesome, keep the pics coming Martin

Are you going to put a cage in it to get the official time slip? Also wheel and tyre combo will be critical for the pass, what have you got planned?

[Wardski]

Subscribed

[Martin Donnon]

Engine was buttoned up today and most of the ancillaries put back onto it getting ready for installation back into the subframe. At the moment we are also rebuilding the bell housing to remove that annoying rattle many GTRs suffer from and toughen up the installation some. Everything is on track in this department - and notice the extended sump - important for high horsepower GTRs that may just well see a track.

With the engine being finalised its time to lay out the newest generation GReddy twin turbo kit featuring the cast manifolds to avoid any chance of cracking under high engine loads. It looks like a nice setup, but having a fair bit of experience with the GReddy kit we are making some of our own little engineering changes to make it even better!

[GT-R OZ]

Martin what the condition of the transmission like after 80,000km? Was it using the OEM fluid?

[Martin Donnon]

The transmission had covered 70,000km and to the best of my knowledge had been on factory fluid all its life. While the gearset was in ok condition the selector pistons were rounded and worn which meaned we had to use our new WR35PC (Piston Clip) to ensure that these didnt turn and cause errors during operation. This is one of the reasons that the transmission was in fault mode when the vehicle was shipped to us (not a local Aussie car). Here is a picture of our fix -

This is very similar to the 'Nissan TSB caps' used when these transmissions wear prematurely under warranty. Note the transmission in the picture isnt the transmission out of the car, its a dummy up for the sake of the photo

[Martin Donnon]

Another part of the build we have undertaken for this car is the complete overhaul of the troublesome and noisy factory Nissan Bellhousing assembly. We modified it complete to make it fully floating so that it could never give any drama in the life of the car from here on in. Replaced the bearings, clips, sleeved it etc. It will be and remain to be totally silent now

If this kind of repair work isnt undertaken whilst the engine is out the bearings and crankshaft can be damaged long term.

[domino_z]

good to see we have a local source for transmission/drivetrain repairs - i think most aussies are still adverse to mod'ing due to the stigma of the first US gearbox issues

ive read about the bell housing tsb in US, what exactly are the symptoms or noises to look out for?

Edited July 25, 2012 by domino_z

[Wardski]

ive read about the bell housing tsb in US, what exactly are the symptoms or noises to look out for?

Extra loud rattles....

[Martin Donnon]

Got on track today with the installation of the GReddy turbocharger system on the GTR engine. This is a very neat install due to the kit being JDM and therefore engineered around RHD cars where most of the American product uses LHD as a base and generally runs smack/bang into the steering column of Aussie cars. Dont ask us how we know this! (much hair missing)

Greddy TD06 turbochargers using the latest generation cast iron manifolds. If you are putting turbos on your R35 then ensure you have cast manifolds....as getting at them if something goes wrong is an engine out job and takes a little time

Large 20G turbine wheels should flow enough air to see north of 550awkw without overly stressing the engine

Twin external wastegates mounted nice and tight to the bellhousing will keep the backpressure in the manifold down and the power up!

[GT-R OZ]

God that looks magnificent!!

[Martin Donnon]

Heat shielding on the turbo system, on both the inlets (which we do) and the exhaust manifolds....

[Wardski]

Nice. This is where I am heading in a year or so.

[domino_z]

Martin can you overlay this dyno onto your own WR600 dyno plot to compare how the greddy turbo's come on boost vs mod'd stock turbos

[g35me]

Martin can you overlay this dyno onto your own WR600 dyno plot to compare how the greddy turbo's come on boost vs mod'd stock turbos

Yes this interests me too.

[Jonny_r35]

Nice. This is where I am heading in a year or so.

I thought you weren't going to modify? This set up does look interesting....

[Marko R1]

awesome & subscribed

[R31Nismoid]

I thought you weren't going to modify? This set up does look interesting....

Everyone says that

[dan_the_man]

Maybe a strange question, but is this going to be driven on the street?

[Jonny_r35]

Everyone says that