HF-mx5t's gt3076 @30psi with 7speed BMW m4 DCT gearbox..
 

just a few pics of my 99% finished 400+ whp project na mx5(german sold cars were called mx5 in 92 )

started out as a modified greddy kit a few years ago..
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diy ic pipes, link , 440cc, all the normal bits.. running 15psi boost. Soon got tired of having just beeing a little slower that the regular porsches etc on trackday events. upgrades had to be done..
Tossed the 1.6 engine. put in a 1.8 from a protege, did not have a inlet manifold for a miata, so i buildt a quick and dirty diy one.
engine had carrillo rods, wiseco pistons, a t3/4 turbo, tial 38mm wg etc..
was running 22-23psi boost.. suddenly the porsches was not a problem.. would easily slide past a 996 gt3 on the back straight.. annoyed the hell out of the porsche guys, lotuses etc..

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engine had a coolant reroute 750cc injectors etc too.. but the workmanship on the header was not good, and the quality of the materials were not good either.. also had issues with heatsoak of brake components in the enginebay..

time to redo everything

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build a better header downpipe combo, for the gt3076 turbo.modified a enthuza 3" system with vband etc.
redid the coolant reroute a bit. better heat shields, rerouted brake lines.6 speed tranny, 3.6 torsen, afco's +++
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Engine internals are still the same, balancing of the engine is better, the head fully ported, and running maruha cams.
Engine mangement changed to a autronic sm4 1.09 and chevy ls2 coil setup.
Ran the engine like this a bit last year.. testing things out.. works GREAT.
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then some Inlet manifold changes.. redid the entire thing.
billet runners for the new manifold. watercut flange
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dual chamber design (sort of like the old grB cars. we have been using this design with great success on 520whp race/rallycross spec saab engines, cosworth engines etc) and running a 70mm tb.
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Attachment 203957 ready for the trackdays... almost :P

some finishing touches left a lot of places on the car.. but it almost there..
thanks to fm by the way, for great support on the afco setup..
Keith, i got all my parts installed, hoping to drive the car in a few days now.. will let you know how the 650/400 setup works :P

the speclist of this car has spiraled out of control the last few years, and i cannot really keep track of what has been done.. but i think the dash is one of few parts not touched.

First trackday test was in july..

sportscar club of norway had a trackday today.. lots of great cars.

Lotus exiges, porsche GT2, radical, 4rotor rx7. ++++


the car is a monster.. .65 bar boost. 3rd gear powerslides uphill on r888 tires, and set a laptime of 1min7 seconds. my friends GT2 with some ruf tuning(550hp, 780nm) did a 1.05something using r comps, racing suspension etc.



cant wait to get it properly tuned.. im expecting it to keep up with the modified GT2.


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http://hiip-photo.com/nsv300609/images/IMG_2564.jpg

http://hiip-photo.com/nsv300609/images/IMG_2531.jpg
My dad was a very quiet passenger for the last set of laps for the day.. while i was chasing my friends 4 rotor rx7

NEW WHEELS!!

lovin the black 15x9 6ul rims with r888 tires :D

http://i165.photobucket.com/albums/u...oshoot/069.jpg
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my first attempt at some decent looking shots of the car in its current spec.
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also. a clear shot of the engine in current spec all heat shields etc in place...
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also.. a very small clip of a testdrive near my garage..



Kind of a massive first post in the build theads.. but hey.. its almost finished now :) Hope you guys like what you see.


dyno time VERY soon. hoping for 400+


Harald F

WOWWWWW:eek5:

I am inspired to go big turbo in the future. Love your car man. It is an absolute pleasure to look at. I can only imagine driving it. I'm sure its on par with JayL's car which I absolutely drool over.

You should post more often:D

Gotta love builds that don't leave you in suspense. Build it first show it complete, Awesome car! Must be a blast to drive.

BRAVO! :winner: You win!

Wow that is one seriously nice MX5!!!!

Damn...nice build.

noob

!!!lol^ the truth, can be a bitch.... Welcome and awesome car!!

I know right, everyone knows that location for the air filter is horrible.

Let boost be at 20 psi. The temp gain with turbo is about 14/15F per psi, or about 300°F.

On a 90°F ambient day, ambient absolute would be 90 + 460 = 550F.
The charge temp absolute would be about 550° + another 300° from the turbo, which comes out to 850°F

Density would degrade by 65%: 550/850 = .64

The pressure ratio at 20psi is 2.36.

So, with the heat from the turbo, then the 236% more density from compression will be degraded by 64%: .64 x 2.36, or to about 1.51. Thus a huge chunk of the density/power was lost and the system is 300°F closer to knock.

With a 90% efficient IC, .90 of the 300°F temp rise will be taken out, or about 270°F removed, thus leaving a net gain of 30°F. This would leave a density loss of only 6% from the heat, or a net gain of 2.36 x .94 = 2.24, or an overall gain of 224% rather than the 151% without the intercooler.

This assumes the filter is in a position sourcing ambient air. Behind the radiator is one of the worst places, the temperate sourced from that area is going to be closer to 150-190°F.

So, let's compare:

perfect conditions; 90°F ambient + 30°F after intercooler + 460°F = 580F
unideal conditions; 90°F ambient + [(190°F intake + 300°F turbo addition) x 90% intercooler] + 460°F = 599F

550/580 = 6% density loss or overall gain of 224%
550/599 = 9% density loss or overall gain 217%

So if you dynoed at 350rwhp with the filter behind the radiator, you have a potential of a 25rwhp gain if you simply moved the air filter to somewhere that would source ambient air.

hopefully i did the math right....but you get the idea NOOB.

Nice build. Wheres your downforce? When you have it you'll beat that GT2

That is very bad ass how are you getting by tuv?

version 1 was pretty awful.
version 2 was a big improvement
version 3 is not as bad as 1, but has room for upgrades to cooler air.


edit: dont get me wrong, the build is awesome and has way more power than my sorry ass car! :)

I'm just being funny Holmes.

Awesome work Harald! :bowdown::bowdown::bowdown: :bigtu:

I think he is in Norway - so that lucky bastard ;) doesn't have to get the bloody TÜV. I think his car is imported from Germany or something like this...

Greets

If someone ever wants to know if Absurd flow will make big numbers, theres your answer.

really nice. i like this one a LOT!

they are even worse than in germany here.. my car is highly illegal.. :P

btw.. i know the filter is in a bad spot.. just havent had the time to fix stuff yet..

and even if i have only a few posts on this forum that does not mean i dont know what im doing. so shut the fuck up about the noob stuff. or show me your version of a diy turbo kit thats better.. asshole :P

btw.. dynoed 396.6whp. and 440+nm torque at the wheels today on a rototest dyno, even with the sucky filter placement. on gas similar to us 93 octane..

bloody hell the car is fast..

sorry this is the best I can do and it's not faster cuz my built motor is still in boxes. the picture is missing COPs and the mazdaspeed triangle brace.

http://gallery.y8s.com/d/17046-2/DSC02740.JPG

btw, I'm just pullin your noob chain. :)

Nice built , I saw your thread in M.net.

Welcome to a real forum.:hustler:

Hey Harald; don't take it that seriously!

y8s is a really nice guy. Plus, as you can see by the pics of his engine bay; he also knows his shit.

:D
not bad y8s..
sorry for the answer.. but hey when your first response is like that, expect to get an answer back :)

thanks for all the positive remarks too guys.. :)

What clutch and pressure plate are you running?

sex on a stick with wheels!

We won't tell anyone then... ;)

I don't think someone is thinking you don't know what you are doing - cause your car is a blast! Keep up the good work!

Greets from the TÜVing Germany

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forgot to post the dyno sheet. the red/blue lines are the first pull. at lower boost setting etc.. the yellow/orange is the later one. 23psi boost

Glad to see you over here now as well. Welcome. No worries, newb bashing is the norm over here :)

I also just noticed the flex joint on the EWG-to-DP joint. I like that. Very, very nice car. Bonus points for the screw-the-man illegal nature of it as well :bigtu:

couple of pics..

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80mph 3rd gear , going uphill :) blacktracking from both rears.. further up the hill, the track has a soft left turn, that is done with the same amount of powersliding, but in 4th gear :) Doing this in almost all corners is NOT the fastest way around a track, but lots of fun :) laptimes while i was learning to drive this monster, is withing 1 sec of my friends trackday prepared GT2 porsche 996.

This car is awesome. I wish I had the amount of money and skills to put into this as you have. Get some Aero mods! Splitter, Wing?

Speaking of Aero, a splitter, a wing, and a diffuser would do wonders for you car.

i could have swore I posted on this thread...odd. But this setup is beautiful!! I am going to copy your dual-plentium intake manifold design, it is very good IMO.

thanks :)

and yes.. the dual chamber setup works, we have been using it on several cars now..


aero mods.. yes. the car will get some aero mods for track use this winter..

btw.. here is a small inboard clip..

http://i165.photobucket.com/albums/u...h_PICT0014.jpg

1-2 gear is totally useless so i tried not getting hard on the gas, but it would still rip loose. .. 3rd gear was flat out, but will still spin all the way out.. but this is on a ver cold day, with slightly damp roads..
on a hot summer day, it will hook up like crazy even in 2nd gear..

with the 3.63 diff and 6speed, the 4th gear will go to 113mph, 5th gear to 140mph.. etc. and i pulls STRONG in all gears. at any speed :D

theres something cool about outdragging a 911 with a "ruf" sticker on the back, and then getting to see the owners face :D

1. Good job taking MY advice (Aero) :giggle:
2. Holy shit the speedo needle just jumps on the last three gears, must feel nice.
3. I want to see videos of the you and the 911
4. Im so envious :facepalm:

When you get that car track sorted, you need to call Top Gear and offer it up for some Stig time on their track. It would be sweet to see a Miata placed high on their board.

Realistically though, they probably get a million offers a year for test cars. But you never know... :D

Yeah but technically his would be a car is somewhat rare, or unusual, and it would be interesting to test. The main complaint about the miata is its lack of power, and how ofter do you come across one with 400whp. If it put a 911 ruf on its ass like he claims I would give it a shot and try, the worse you can get is a no. :dunno:

How not to autoX

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just coming out from a 360degree turn around a barrel , got really wide and almost hit the wall
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go in to the slalom section WAY fast.. like 20mph to high

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flip 180 and kick the cone away with the rear wheel..

The newfound power caught me of guard, and i entered the slalom part at probably 20mph faster than i should have ended in a big spin and hit the cone backwards :P

got my act together and posted the best laptime of the day right after this 3 second improvement from my last personal best :)

call me when its ready.

man that is a nice setup really like your IM

thanks, spent a lot of time on the IM.
Still modifying the car . installed a osgiken diff(the torsen was just about dead after one season , the engine and wide r888's are putting a lot of stress on the drivetrain).

also got a gtc200 wing for the car. Making a front splitter for it too.. and probably putting hoosier R6 tires on it for trackdays..

I'm sure many here would be interested to hear how much better you like the OSGiken diff compared to the stock torsen. There has been a bit of discussion lately on differential options for high power cars, including the OSGiken.

well, im atleast hoping the osgiken does not detonate as fast as the torsen.. the worm gears inside the torsen were showing signs of damage after 5000 miles of very hard use. and the inside wheel was slipping in 3-4gear turns.. im really looking forward to testing the osg diff. but right now we have about 70cm snow. so it will have to wait a few months :)

and too think, all that work and Hyper's miata is still faster than yours because its not weighed down by a turbo :laugh:

Just screw some spikes into your tires and go for it! I'll bet you would be the first to race a 400 HP Turbo Miata with a OSGiken diff on ice. It will be groundbreaking or at least somethingbreaking :giggle:

What are your front brakes?


My understanding of the theory behind the dual chamber manifold is that it's basically like the turbine inducer, but unwrapped from the snail into a straight log. It takes the rapidly moving intake charge and discharges it through a slot to the slow-moving, high-pressure charge in the manifold very efficiently, with little turbulence.

theory is that it also distributes the flow very evenly across the entire "log"

we have buildt similar manifolds on everything from 600whp saab engines for racing, to "mild" streetracing bmw e30's. with very good results.

front brakes are hispec 4pot calipers over something im guessing are the corrado g60 discs. using ferodo pads. mazdaspeed master sylinder and brake booster. goodwin rear disc upgrade. all in all a very confidence inspiring setup. car easily does over 200kph on a very small track and it still feels safe to brake very late.

Mazda MX5

Says your kit uses "D" calipers. Don't think it's the Corrado rotor, as if I recall, that is only 280mm.

Ran the numbers today, and it looks like you're really front-biased, about the same as if you just put the '01-05 Sport brakes on the front, but not the rear. You'd have a lot better brake balance if you either changed to the C calipers with 34.6mm pistons on your current setup, or changed to the actual Sport brakes on the rear, with a 35mm piston. With the larger gain from the Sport booster as discussed by Keith over at M.net recently, you should be okay for effort with the smaller front pistons and have a righteous pedal feel.

put in a sensor at one of the rear wheels today, so the ecu will have a proper speed reading of the rear axle. also putting in sensors up front. experimenting with gear based boost, variable traction control :)

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What is that sensor using for a reading? aka what is giving it a signal? the brake rotor mounting spots coming within a certain distance?

I am looking into setting up a telemetry setup for my car to get it dialed in (and make traction control) and this would be essential

it is seeing the metal backside of the wheelbolts as they go by the sensor at around 1.5mm distance.

I only wish you made more video's of this beast. I've watched and drooled over your old ones 100 times already

hey fuck you :P from cali i see? you guys dont have winter :P

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a 400whp miata is not exactly suited to the conditions we have in winter.


give me a few months, and i will start posting some vids again :D getting the gopro HD too..

Oh shit:giggle:

Ok I get it:)

BTW, just HAVE to share this vid.. friends of mine made a GHETTO dyno, to learn how to tune their even more Ghetto rides.. thing is tho.. they use cheapass solutions. but this shit actually works.. rear mount turbo ls1 in a 200sx s13 :D

YouTube - Driftfun and Haga Homemade Dynotest LS1 s13 2010

heres a vid of the car before turbo :)
Powerdrift Norwegian License day 2009 on Vimeo

That's awesome:D

Its ghetto, but it works, so its awesome.

oh man that was so ghetto and awesome

The dyno is awesome even though many will say it's not safe, etc. I had visions of a similar device once. If you install a flywheel of some type to the drive axle input (output) it will greatly increase the inertial load available to simulate the dyno load. It could even be a complete drivetrain with the transmission (different load gears) and use a flywheel there.

they are already using the air brakes .. planning other additional ways of adding more resistance..

I did notice the brakes were still on there. ;)

took the engine out today.. dooing som small mods..

brace between the downpipe and transmission.. changing the wastegate to a V band unit. fixing a small leak near the oilpan, general checkup etc..

pics of the downpipe brace..

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3mm stainless steel. solid as hell.

also included are some general pics of the engine, and specifically the coolant reroute setup on my engine.
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I love that motor :fawk:. We need more videos of this thing!