Car Feature>> The Rb25 Mazda Roadster

Let's cut to the chase. I've never been in any car that accelerated as hard as this hairdresser's car and I've been in a lot of fast cars in my time as a speedhunter. Most of the really fast cars I've experienced were race cars of some sort. But this Mazda Roadster is born and bred to be a street car, putting down killer times at the drag strip is just a part time job for this little guy. 

I came across this car while perusing the pit lane of the Irwindale Thursday Night drags with fellow Speedhunter, Mike Garrett. At first glance, I thought, "Oh wow a drag spec Miata! Would make for a great spotlight…" But upon further investigation and viewing what was underneath the hood, I knew I had to revisit this car again for a full feature. 

Seven years ago, Cris purchased a completely stock classic red 1990 Mazda Miata. After high school, the car started its journey into the fast the simple addition of a Greddy turbo kit then to a fully built 1.6L motor. But that didn't feed Cris' appetite for horsepower. Luckily, a friend who is also a professional drifter, Chris Kregorian, blew up his RB powered S14 and offered it to Cris.

This month, we've seen some pretty amazing drag racing machines already, but what we haven't really seen yet is a really cool street tuned drag car. This Roadster definitely checks off all the right street car boxes. It is pretty rare to see a car designed to be a groin-pleaser in the corners be built up to do the same, but in a totally different discipline. 

This badge in the rear gives you a glimpse of why this car is as fast as I've proclaimed. 

This monstrosity is what lays inside the engine bay. It's an RB25DET from a Nissan R34 NEO Skyline. Imagine 711 horsepower and 581 ft/lbs of torque, on Q16 VP race fuel, in a car that weighs in just around 2500 pounds. A Greddy plenum intake manifold sits to opposite to the custom made turbo manifold. A Greddy fuel rail with 660cc Seimen's Deka injects and Greddy intercooler was also installed. 

Inside the engine is a set of 87mm Supertech 9:1 forged pistons, ARP headstuds, ARP mainstuds, ACL Calico coated race rod bearings, and a ACL Calico coated race main bearings. 

You can't expect to drop in an RB motor hoping it'll fit, so a lot of custom made parts had to be created. It took Cris and his brother two months to create motor mounts, transmission mounts, the drive shaft, the 3" full exhaust system, wiring harness. Lastly, the firewall itself had to be modified for the engine to fit!

The GT3582R dual ball bearing Garrett turbo is tucked neatly under the custom made manifold. The manifold may not look to be heat wrapped by professionals, but it definitely does the job.

You can listen to me wax beautiful poetry after experiencing the brutality of this car here.

The result of 711hp and 581 ft/lbs (the right lane on the time slip)? An 1/8th mile gone in 6.3 seconds and at 115mph! 

Cris will be tackling the 1/4th mile next month in Fontana at the Battle of the Imports. He's confident that the car can pull a 9.5. We'll see…. :)

A normal 1.6L Mazda rear end would blow up at such numbers. So it was replaced by a Cadillac CTS pumpkin with a CTS-V LSD inside.

The fully stripped interior houses the usual race car upgrades: Sparco Evo bucket seats, Sparco steering wheel, Sparco Aluminum pedals, Autopower 5 point racing harness and an Innovate Motorsports Wideband.

This homemade shift knob with a duct tape wrapped red button is another glimpse to its power….

In the trunk sits a 75 shot of NX wet nitrous, giving it an extra 85 horsepower at the top of the power band. A quick squeeze of the red button sends this car from zero to halfway across the globe in the blink of an eye. 

When you do 6.3 @ 115mph, any bit of chassis stiffening to get the power down on the ground helps. So, a Moss Motors rear strut bar helps do just that. A piece of the bar was cut off to its easier to grain access to the rear strut for quick dampening changes. Ghetto, but it works.  

A six point roll cage was also put in for safety and chassis stiffening. 

Lately, there's been all this talk of stance. But really good stance doesn't have to be super low with wheels that fit just perfectly. This Roadster has an insanely aggressive stance and its stance is brought to you by Tein Flex.

If it the car wasn't grinning ear-to-ear so much, it would eat school children for breakfast –with Nutella.

Mmmm… beefy.

Work Equip 003s top off the car's overall look. The front houses a set of 15x8s where the rears house a set of 15x10s wrapped with Mickey Thompson 26/10 full drag slicks! The rear quarter panel has fender flares molded into the body to give the car an overall cleaner look. Don't want those rear slicks to stick out so much, do we?

After seeing so many super slammed Mazda Roadsters lately, it a nice change to see something a bit different. 

After the photoshoot, Cris and his friends decided to show me just what this car was capable of by demonstrating the art of the burn out with full on drag slicks! Beautiful. 

The car was not be built like a top tier racing team. It's a bit ghetto in some places, yes. But the short cuts that Cris and his brother took on this car were nothing that sacrificed this car's main goal: to fling all internal organs as far back into the bucket seat as physically possible on acceleration. Did it achieve that goal? Ask my organs yourselves. They're stuck on the back of that red bucket seat still. 

-Linhbergh

Engine Specs: R34 Rb25det NEO skyline engine

-GT3582R dual ball bearing Garrett turbo
-SPEC Twin plate clutch

-Greddy Intake Plenum manifold

-Greddy Fuel Rail

-Greddy timing belt

-Greedy intercooler

-Greddy radiator cap

-660cc Seimens Deka injectors

-Twin Bosh 044 Fuel pumps

-(8AN) Fuel steel braided lines

-87mm Supertech 9:1 forged pistons

-ARP headstuds

-ARP mainstuds

-ACL calico coated Race Rod bearings

-ACL calico coated Race Main bearings

-87mm Cometic Metal head gasket

-NX Wet nitrous system (single fogger)

-Aeromotive Fuel pressure Regulator

-GM Rear End

-6 point Full Roll cage

-55mm KOYO radiator

-AEM EMS 

-OEM rods

-OEM crankshaft

-OEM cams

-OEM valvetrain

-OEM oil pump

-OEM RB25 Transmission

-ORIGINAL Motor mounts

-ORIGINAL Transmission mount

-ORIGINAL Turbo headers

-ORIGINAL Drive-shaft

-ORIGINAL 3'' Full exhaust System

-ORIGINAL wiring harness

-ORIGINAL headlights

Interior Specs:

-Sparco Evo seats

-Sparco Sterring wheel

-Autometer Oil press, Boost, and Water Temp Gauges

-Autopower 5-point Seat Belt Harness

-Innovate motorsports Wideband

-Sparco Aluminum Pedals

Exterior Specs: 

-Work Equip 15×10 15×8

-Tein Flex coilovers

-M/T full drag Slick 26/10 tires

-Suspension techniques Sway Bars

-Cusco Front strut bar

-Moss Motors Rear strut bar

-GTR Gun metallic Gray paint

-Custom Rear Panel Flares

-50lbs sand bags

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64 comments

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2

this is a rice burner!!!!

3

saw this on the dyno:)

5

rice burner that'll smoke the big bad muscle guys

6

thats an RB26DETT is it not because it looks nothing like my RB25 in my car

7

It doesn't look like a RB25 indeed... valve cover is from an RB26...

8

Miatas are not real cars.

10

This may be one of my all time favorite cars...I would like...no love, to see this car stanced though!

11

i would stuff a rotory engine in there and got just as much power and kept it all mazda...and it wouldve been lighter...that engine is just as heavy as the car..lol

12

"hey bro what motor should i put in my mx5 a gala 12 or a gala 24"

lmaoooo

it looks like a 26? just the rocker cover?

13

Wicked machine. By the way, there's a bit of a typo under the 1st interior shot.

14

dirty yet super clean

15

So, tell me why it needs a GTR badge when the motor and nothing else on the car is from a GTR? Fucking get it off.

16

aint that an rb26 head?

17

wow that is sooo nuts, I'm truly impressed! It'll earn the trophy of most interesting thing I've seen today. Seeing it's owned by a normal person makes me want to give even more props. You see the potential for more but they've already done a lot and it's looking great!! Keep up the good work!!!

18

Desktops please!

19

Awesome write-up! Love the last mod. I love to see features on cars like this

20

Why RB ????? Great spec list! =)

21

Tight. thats where Tony Fuchs garage is at.

22

finally a Miata that needs overfenders...

23

don't like the gtr badge seeing as the motor is out a gts.

i think because its a neo spec r34 rb25 it has the more modern (rb26 vc) But don't quote me on that.

also I think the reason he put this motor in the car above all the other choices is the fact that HE GOT IT FOR FREE!.



Cool ride and would def be a surprise to see on the street. I wonder if the setup works on the street

24

That does look like RB26 rather than RB25

25

Bad Ass... One of the dopest miata's by far

26

haters gonna hate :) grats on the awesome build.

27

simply stunning

28

why ... o god why would you do this ... p.s its a rb26 not 25 can tell by the valve covers unless he put a 26 head on the 25. .. but then why would he put gtr badges on?

29

Why does it have a GT-R badge when this car has a RB25, rather than a RB26? Dumb

30

Check out the cam sensor it have 2 intake and exhaust =D !

31

looks like a rb25 with 26 valvecovers..not sure if real r34 neo has wrong cam angle sensor unless he changed cams...but nice...

32

thats pretty sweet. i love engine swaps like this.. this makes me want a miata, thats a first

33

cool engine setup!

34

I love this car! All import MX5 is nice. I have seen a lot of LS swapped MX5's and this is just sick!

35

this thing is ridiculous. 100hp is scary enough in the rain in a miata.

36

put that sh1t sidewaysssss

37

The amount of haters in this thread is amazing. Most these people can barely put a new set of wheels and coilovers on and here they are talking trash about this car. They obviously have no idea how much work goes into custom fabrication of this type. Sure its not a mazda engine, the rb is heavy, and some of the stuff was done as a short cut.. but there is no way you can deny the hard work that went into this car.



lawlz

38

that engine should tear that little car to bits.. its a show of good workmanship under the bonnet - love the tyres track shot at the end.. i'm surprised!! is this thing street legal??!!

39

it's an rb25, look at the inlet cam... it is a variable timing cam, the rb26 doesnt have that

41

actually the setup wasnt for free, and if you read carefully on the article where linhburgh states "You can listen to me wax beautiful poetry after experiencing the brutality of this car HERE." CLICK ON HERE, ITS BECAUSE IT WORKS IN THE STREET.



the GTR badge issue will no longer be a problem being that a fully built RB26 is going in SOON!!!!..........

42

look it up on youtube RB25MIATA

43

where is this car in stock form without the slicks? got pix?

44

i like it!! it could look better with some details taken care of tho.

but i love engine swaps like these, pretty coo props, and good luck in that upcoming drag challenge

45

Funny a rb25det neo is quite different. looks like it has a rb26 head on it.

46

this is greatness in a car, why ppl hate so much on craftsmanship

48

Wallpaper of the burnout at the bottom!

49

sick ass car. known chris for a long time. that car is badass and gave many people run for there money. not normal to see a miata with a huge tire, thats when you realize somthing is not right here. lollllll



keep up the good work......................

50

Who did the paint job? its really good!

51

PINKS ALL OUT!!

52

It goes to show that the Mx-5's original engine has insufficient potential and a Skyline's power unit had to be implanted. It's an RB25, not RB26 so only the rocker covers are from a GTR!



A hairdresser's car with a GTR badge, definitely gay. Probably need all that power just to get away from the embarassment of being seen in such a car.



Great craftsmanship though!

53

how many dumb ppl are there commenting in this feature. ITS NOT A 26!!! you can put 26 rocker covers on a 25 they swap straight over and with big power and boost you need to so you can put baffles in the covers.



if you dont know what you are talking about dont try to comment making corrections.



on the topic of the car it would be mental to drive. but im skeptical that its making 771hp with only 660cc injectors and only with a 3582R. is the 771hp with nos? post dyno sheet.

54

wow crazy setup

55

Thanks Everyone for the support on my car! Specially those who make the feature more interesting to read!... It is an RB25Neo, there are internals from an Rb26 like Rods, oil squirts, Oil Pump and many other small things that didnt need to be mentioned before. The RB26 is coming really soon...!!!... I know its a crazy swap, but I and Speedhunters like it!... thanks again!



Dynosheet... http://i1015.photobucket.com/albums/af271/rbmiata/RB26%20miata/IMAG0078.jpg

Street tires... http://i1015.photobucket.com/albums/af271/rbmiata/RB26%20miata/jpeg-2.jpg

56

its a rb25 with 26 head/cover right??as the intake shows no 6 throttle..its a 25..

57

Must be an Rb25det from an R33... look at the Cam angle sensor.. oviously from an R33... as NEO engines have completely different Cam angle sonsors.... different drive also so impossible to change... and then hes just put rb26dett cam covers on, which bolt straight up

58

this motor is surely not an NEO engine.... Neo's have a different cam angle senor for starters (different drive so cannot be just easily swapped over...), and they do not have a VCT oil return to the block like this has.... Its an R33 Rb25det..... how can the owner not know this??? unless hes trying to trick people.... but do the research yourself, thats a r33 motor

59

man.,.who gives a s*&% if its a neo or 26 the thing is that is a crazy swap that none of us have seen before!!!

im not gonna sit here and talk S*&%$ i rather just appreciate this guys originality instead of hate on it.

if you cant build one faster or better then shut up cuz i know i cant!!!



ENOUGH SAID..

60

NZ... ur analogy is perfectly right when talking about an R33 engine. U seem to know stock rb's pretty well, but it seems as if u have never combined parts around the rb engines... The vct oil return line was purposely machined for a better oil recirculation to the block(if u have a neo u could see that it has a return plug on the block)... The cam sensor is easy to replace when you know how to shim the buckets for a 25 camshaft and then just swap it in... we r not trying to trick anybody, actually we are just trying to show car enthusiast like u, how is not about knowing a factory engine, but how experience and machining make a difference in a motor be different from everyone... engine, works, car works, make ur mind work!

61

NZ... ur analogy is perfectly right when talking about an R33 engine. U seem to know stock rb's pretty well, but it seems as if u have never combined parts around the rb engines... The vct oil return line was purposely machined for a better oil recirculation to the block(if u have a neo u could see that it has a return plug on the block)... The cam sensor is easy to replace when you know how to shim the buckets for a 25 camshaft and then just swap it in... we r not trying to trick anybody, actually we are just trying to show car enthusiast like u, how is not about knowing a factory engine, but how experience and machining make a difference in a motor be different from everyone... engine, works, car works, make ur mind work!

62

AGREED WITH BOTH CRIS FROM ORIGINAL AND NZ BUT WHILE YOU GUYS ARE DEBATING ON THAT, WE UPLOADED SO YOU GUYS CAN CHECK OUT THE BURNOUT VIDEO AND THE STREET PASS VIDEO ON YOU TUBE

BURNOUT VID: http://www.youtube.com/watch?v=7hect0t4qTQ&feature=related

PASS VIDEO: http://www.youtube.com/watch?v=GaAEj3H5gu4

INCAM PASS: http://www.youtube.com/watch?v=BwEB-wta_og&feature=related





NISMONIGGA@ ORIGINAL

64

It's ok.. except for that GTR badge and that RB26 covers... on an RB25! :/ It's a poser wannabe on another level.

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