VR38 build

[GTR1993 4]

Hi guys,

Looking for a bit of a guide. I have a complete R35 GTR that I stripped down, the vr38 has a Samsonas sequential being it backed by a 32 GTR transfer case, 32 GTR with quaife in the back and quaife and albins gear set in the front diff.

Cut a long story short I have a bit of a build thread on another forum but I'm trying to sort out the parts for my VR38. I already have G25 660 .72 externals for it and I'm looking at approx 1200hp crank maximum on E85.

My thought process at the moment is

Carillion rods with carrs

CP pistons

ARP main studs?

Aged 625 ARP head studs

Kelford 272 cams and springs.

Motor runs motec m150 and daily dry sump pump but but is tba as I am trying to find some room in the front of this thing. I have a Waterman mech already that I will run this in the back with a cable. 

My question is do I run pistons on the stock bore and select the correct clearance piston skirt. That is option 1

Option 2 is run the small dry Darrin liners so it is a simple known quantity with approx standard bore pistons. I like this option also bit is preference 2.

Option 2 is not what I want and that is to run MID liners. I'm not sure I want to pull that much alloy out of the block.

If anyone has some experience please give me a hand. Unfortunately I am burning hours designing up custom dry sumps and bell housings for this thing and would like to not reinvent the wheel with this.

Thanks

 

[GTR1993 Topic Author 4]

OK I will keep this as a bit of commentary about what I discover with this build as it seems not many people know or they like to keep the info close.

Firstly there seems to be a fair amount of misinformation about the lining on the bores. Most places call it Nikasil with is an electroplating process used for motorbikes etc. They can get layers of it and it can be honed etc. More importantly this coating can be re-coated easily by places in Australia. Anyway, the skyline bores are not electroplated, from my understanding it is plasma sprayed which I am guessing is much like metal spraying shafts etc to build them up if they are worn, I see this in the mining industry all the time. 

Anyway, on the block is numbers 1, 2 or 3 referencing what size your bore is from the factory. In my case it is 222222 but could be any combination of numbers. For the first build of the motor (motor is 40k kms and not hurt) I am going to go with Manley pistons in 2 size to suit standard bore. I am undecided about the rods, Manley or Carillo, probably Carillo. I will also go main studs as I can line bore it no issue. I want to go head studs, unsure if the aged 625 are needed, and more importantly unsure if they will distort the bores slightly as I can't bore or hone the cylinders. I will investigate further.

I am pulling a head off and bringing it to a guy to see what it flows and see what is needed for 1200 hp, probably not heaps. I am going to run the Kelford 272 cams with this combo.

If this goes pear shaped and I want to bore the block I will use Darton dry liners. i am not game to go for a full wet sleeve straight up.

I will post pics as I go. 

[KiwiRS4T 590]

I fear not many members have an R35 GTR to play with and I suspect most modified VR38s are built in the big workshops.

Interested to follow your progress though!!