Zebra's 2010 Mra Gts-t Build

[zebra]

Hey Guys....I figured I may aswell throw this up here....cause well Im bored

After much discussion and thought I decided I'd give MRA a shot - http://motorracingaustralia.com.au/

The car will be pretty basic as I just want to go out an race rather than spend the next 2 years building the car.

So here's a basic run down on what the car has now.

ENGINE:

Standard Internal RB25DET

Stainless Exhaust manifold with 38mm Ext Gate

KKK K27 Turbo with a .6AR exhaust housing (its tiny)

Greddy Copy Plenum and standard throttle body

3" Mild Steel Turbo back exhaust

Suspension:

Tein Super Streets

Adjustable Rear upper Arms

Adjustable Caster Rods

I was going to change the Super Streets for somthing a little more track orientated, But I remeber the Success that the Mark Berry / Russel Newman 32 GTR had running them, so I decided to leave them.

In the next week or two I'm going to order a Bond Mild Steel Half Cage (MRA regs require a CAMS Spec Full cage) So I will have the rest of the cage finished off before the 2010 season starts, and once im game enough to hack into my dash for the cage

Im pretty sure ive got a fixed back seat sussed (sparco Sprint V) just going to have a sit in one before I make my decision.

Im yet to decide on what ECU I will use...Sold my PFC Pro when my old engine went POP, DOH!...considering just getting a Toshi Re-map

Injectors will probably be S15 SR20DET 450cc Jobbies as im only aiming for 250-260rwkw on this motor.

Any way enough rambling time for pics.....

Heres how it sits at the moment.

Engine Completed

First Start

And my surge tank.

Ill Have some more pics later today

[Redsuns88]

nice mate,

keep it up..

[zebra]

Cheers Mate

Car goes in to get the dump pipe made up tomorrow.

[N1GTR]

Mmmm somethings wrong, i cant see an RB30 there.......whats the deal?

Hahaha

[Duncan]

good to see.....lots of club cars coming in NSW atm

[zebra]

Rb30 Will be the next engine im thinking steve-o

Cheers Duncan, I got tired of watching from the pit wall and telling everyone how much id love to be out there.

[zebra]

Stevo- was thinking last night that once the car is a full track bitch that its gonna cop a VQ30det, all alloy 3L V6 Turbo with a GT3076 hanging off the side

Also does any one know if 33 GTR rear sway bars will fit the gtst?

I know the front wont.

Heres a few more pics...while im waiting for the tow truck to arrive

And Here is the reason for this new engine....

[Redsuns88]

juicy

[Risking]

Stevo- was thinking last night that once the car is a full track bitch that its gonna cop a VQ30det, all alloy 3L V6 Turbo with a GT3076 hanging off the side

Also does any one know if 33 GTR rear sway bars will fit the gtst?

I know the front wont.

Heres a few more pics...while im waiting for the tow truck to arrive

And Here is the reason for this new engine....

thatd possibly be the worst thing you could do to that car. Stick with the RB25/RB30/RB26

The cost to change the engine over will outweight any benifits and there is far better support for the RB engine than the VG.

You have to remember your trying to build a race car. The simpler you make things the easier it becomes. Go stuffing an engine into a hole it was not meant to be in and your asking for a world of pain.

Custom parts can't be found easily at the race track. Atleast with an original engine there is some hope of getting the right parts when something breaks from a repco or supercheap etc.

If your prepared to carry a mirrad of spares around then go for it but really there is nothing wrong with the RB and id forget the VG idea before it even gets off the ground.

[zebra]

VQ Brad VQ...like this

[Risking]

Yeah sorry I did read VQ but had VG on the brain.

Same applies still. Dont do it.

[zebra]

she'll be a while off yet before I decide what to do....havent even driven the car with this engine on the road yet lol...although i did scare a little kid and his mother driving out the driveway to the tow truck this morning.....zero exhaust and 3000 revs FTW haha

[Risking]

shouldnt have to decide. Drop the V6 idea before you even begin.

Id considered it a few times over the years and never done it for a few very good reasons. Money not being one of them.

The RB works perfectly in the chassis

Transmissions are cheap and easy to get for the RB (try buying an upgraded VQ tranny for a decent price)

No custom one off parts that might fail and cant be replaced at the track

Single sided exhaust system keeps thermal management to a minimum and also weight

Plenty of off the shelf parts for the RB, bottom ends etc are so cheap and easy to get (again price a VQ)

Management is simple and easy to get

Not to mention the outlay to have things made like tailshafts etc etc.

My oppinion is that youd spend a tad over 10 grand converting to a VQ roughly. That 10 grand would more than cover a decent dry sump system for your existing RB and also cover alot of the rebuild parts you'd need to make it sturdy.

Also saving alot of headaches and drama come time to race it and break it.

Just my oppinion. Like you say long way off but id be changing direction now.

I considered using a VQ40 pathfinder engine in my current GTR but gave the idea away and went back to the old faithfull RB26. There is just no reason to make the change in a chassis that works so well with the RB

[zebra]

Yeah fair call....mmm dry sump.

I know what you mean about bottom ends been cheap....my "race" bottom end cost 200 bucks lol and has better oil pressure and less blow by at idle than my old built motor ...what a sack of crap that was.....biggest waste of 6 grand ever

[N1GTR]

Considering you've already got an RB25 head, id be going the rb30 bottom end for sure, just forged pistons, good oil setup, and still the same turbo

Is the head youve got ok or is it stuffed?

[zebra]

i hope its good...its on the car now lol

yeah im gonna see how this turbo goes with the little exhaust housing (was on B-mans Fj20 before i bought it) if i dont like it, the bigger .9 ar housing is about 400 bucks.

But im told this turbo made 312rwkws on a rb20 so we should be good for my 250kw target.

Rb30 would be nice though...might have to have alook at the local wreakers

[zebra]

hmmm old pics dont work so heres some new ones

Found out why the car was idleing funny....both cams were out by around 20 degrees

so thats fixed now

[Duncan]

ahh don't worry about the motor Andrew it is the least of your issues. just get something bolted together that works, get it tuned up....then turn it down 20% for safety and mid range pull.

then....start on all the stuff that adds up but makes a much bigger difference than outright power....

bushes

shocks

springs

brakes (F&R)

diff centre

safety gear (seats, harnesses, cage, kill switch etc)

wheel alignment (including testing)

wheels

tyres

tyres

tyres

tyres

you get the idea

[zebra]

hahah yeah, seat is next, then cage, theres also not enough adjustable bits in the front end so ill look into some cusco upper arms, then sway bars...my god the list gets bigger everyday haha

[Duncan]

I know you've got a long way to go yet, but unless your budget is "ample" stay away from stuff like cusco. It is top shelf quality with a price to match.

Instead....head down to just jap and check out what they have