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LuckyKid

PartsBadger - Miata #630

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Team PartsBadger - Miata Build Summary

 

Results:

Road America - DNF & 45/77  2:49.277

Sebring - DNF & 45/81  2:33.328

Road Atlanta - 2/77  1:42.687

VIR South - 35/49  1:21.483

Road America - DNF & DNF 2:48.797

Watkins Glen - 15th/108 & DNF 2:14.917

 

Suspension:

Most available from 5X Racing https://5xracing.com/c-425748-miata-suspension.html

Springs - 850/450 Eibach  *Moved to 900 on the LF.  

     Front PN: 0600.250.850  & 0600.250.900

     Rear PN: 0600.2530.0450 (Barrel)

Shocks - Bilsteins

Bumpstops - 5X Racing 36mm Race

Perches - Ground Control

Front Sway - Swapped as needed (RB hollow is 5lbs lighter and 30% stiffer than SM), SM, FlyinMiata, Stock and Drilled Stock

Rear Sway - Stock and SM

Bushings - Delrin (Contact me if you want some)

 

Alignment: 

Ride Height - 4.375" front and 4.875" rear

Camber - <2 degrees (Finding ideal setup, could be closer to 1 degree based on tire temps)

Caster - Max

Toe - Front (1/16 to 1/4 out), Rear 1/16" Toe In

Wedge - Track Dependent

 

Wheels/Tires/Hubs:

Tires: 245/40-15 RS4 (Hankook)   Hot Pressures around 24 PSI

Wheels: 15x10's  (15x9s seem just as fast and might be more durable in the event of curbing) Konig Dekagrams Seem Best So Far

Wheel Bearings: OEM Repack with Neolube

Wheel Studs: ARP

Hubs: Do not get Centric economy hubs or Timken.  Centric has a part number for good hubs, the economy one ends in E. Or go OEM.

 

 

 

Drivetrain:

Engine - JDM 99 Miata Swap - Shaved Head & Balanced (JDM has a BP5A Intake Cam & Square top Manifold)

Underdrive Pulley - Removed first race

Injectors - Reflowed by RC Engineering

Header - RacingBeat 4-1 (Highest HP outside of exotics)

Intake - Custom 12" PAX Headlight (21" is ideal - Relocating to high pressure area in front of radiator)

Exhaust - Springfield Dyno(Multiple Failures), Custom 2.5" and Kooks on backup, 2.5" seems too big diameter.  Added multiple hangers and chain to hold up exhaust.

Differential - Torsen Type II (Should be superior to Fuji type)

Transmission - 5 Spd (6 Speed was more trouble than it was worth)

ECU - Megasquirt PNP https://5xracing.com/i-23168697-megasquirt-pnp2-engine-management-system-for-1990-1997-miata.html?ref=category:1067653

Coolant Reroute - DIY

 

Dynoed at: 151HP with Pulley and SD exhaust (Before Road America)

Dynoed at 125HP w/o pulley and bad self tune (After Sebring) *edited for accuracy

Dynoed at 145HP with custom exhaust and good tune (Before Road Atlanta)

Dynoed at 133HP with exhaust cam retarded a tooth and valve spring issues (Before VIR)

Dynoed at 148HP - Added Port and Polish - 21" Intake 

 

Body/Aero:

Windscreen - (Abrasion Resistant Polycarbonate 1/4")

Top - TreasureCoast Race Top, Moved to Chop Top with Custom Fast Back at 15 Degrees (testing Road America Spring 19)

Wing - NineLives Racing - 64" - Moved to 68" with new fender width.  Mounted with Aerostruts vs. Plate.  Mounted 11.25" Above roof (Air is likely to separate along the center plane if mounted lower based on my research)

Airdam - 0.070" HDPE:  https://www.amazon.com/gp/product/B006K8HXGK/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

Splitter - 3/8" Birch Plywood, Alumalite 5" extension, Alumalite 2.5" extension

Flat Floor - Testing at Road America Spring 19.

 

We lost the wing at Sebring and the car lost 4.5 seconds a lap.

 

We lost the splitter and airdam at VIR South and we lost 5 to 8 tenths per lap.

 

The new fastback seems to reduce drag.

 

Electrical:

Harness - Stripped, Ignition Switch Removed

Battery - Braille 9# (Relocated to PAX Seat)

Lights - Diode Dynamics 3 x SS6, 1 x SS12

 

The car is in the mid 1900lb range.

 

For splitter templates FREE please PM me.

For delrin bushings please PM me.

 

 

52441763_1212078602281233_2213267703567745024_o.jpg

 

Tech Points:

 

After Swap 350

Air Intake 0

Wing & Mounting Structure 10

Splitter 10

Airdam 10

Diffuser 10

Brake Cooling 0

Exhaust -

Brake Pads 0

ECU 0

Header 25

Radiator Screen 0

Coil Overs 40

Bushings 0

Wheel Spacers 0

Interior Bulkheads 0

Metal 23

DIY Coolant Reroute 0

1.8L Fuel Tank 0 (In Swap)

Fiberglass Chop Top 0 (OEM Profile)

Drivers Window Vent 0

4.3 Diff Ratio 0

Radiator Ducting 0

Total 487

 

Diffuser - Tech Email

Coolant Reroute - Tech Email

Flywheel - Tech Email

Shocks 2x

Front Calipers 2x

Front Rotors 2x

Rear Calipers 2x

Rear Rotors 2x

Engine Paperwork

 

Swap Rules

Engine & Intake Manifold

Coil Pack Adapter

Coolant Temp Sensor Adapter

Throttle Cable Adapter

Edited by LuckyKid
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Base VPI - 300

Swap - 50

Header - 25

Suspension - 40

Sway Bars - 40

Splitter - 10

Air Dam - 10

Wing - 10

Floor? - 10

495 with the floor by my calculations. 

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1 hour ago, Wink said:

Base VPI - 300

Swap - 50

Header - 25

Suspension - 40

Sway Bars - 40

Splitter - 10

Air Dam - 10

Wing - 10

Floor? - 10

495 with the floor by my calculations. 

 

don't forgot the diffuser, and the differential.

Edited by MoparBoyy

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23 minutes ago, Originalsterm said:

Would the new top be additional points for material as well?  I'm curious how that all works in the real world.

 

I don't think so, but I'm not a miata guy...I know they now have to use a higher vpi for a platform swap

 

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1 hour ago, Originalsterm said:

Would the new top be additional points for material as well?  I'm curious how that all works in the real world.

 

1 hour ago, MoparBoyy said:

 

don't forgot the diffuser, and the differential.

Diff is no points because of the swap, having to start with 1.8 value lets you use 1.8 diffs. 

 

We have been told anything added to the top that takes it outside of the stock hard top general shape(see our homeade top) is charged as material points.  In our case, we built the cage when tops were 700pts back in the day and cannot really make one work with how the cage is without redoing it. 

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14 minutes ago, hotchkis23 said:

 

Diff is no points because of the swap, having to start with 1.8 value lets you use 1.8 diffs. 

 

ahh ok, so you have to start with the NA8 car then with engine swap gets you to 300 plus the 50.  you get the fuel tank of the NA8 and the diff.

 

I'm new to Miata's and don't know much about em.  Just picked up a NB2 with 44k on it a few months ago.  just did flyin' miata shocks/springs and sway bars.  fun little commuter car!

IMG_20190214_171907.jpg

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2 hours ago, MoparBoyy said:

 

don't forgot the diffuser, and the differential.

 

 

My question is if you take the '99 and newer vvti miati motor and swap it aren't you now at a vpi base starting point of 350pts?

 

I thought the only car that was exempt from the platform swap rule were 944's...

 

 

Edited by Racer7x

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16 minutes ago, Racer7x said:

 

 

My question is if you take the '99 and newer vvti miati motor and swap it aren't you now at a vpi base starting point of 350pts?

 

I thought the only car that was exempt from the platform swap rule were 944's...

 

 

No, think e30 vs e36.  Still a 3 series, but a different platform.  NA6 and NA8 are considered the same, NB, NC, and ND are all different platforms of Miatas so if you start with one of those chassis, you start with their points.

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51 minutes ago, Racer7x said:

 

 

My question is if you take the '99 and newer vvti miati motor and swap it aren't you now at a vpi base starting point of 350pts?

 

 

99 doesn't have VVT.  my 2002 does though

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5 hours ago, Wink said:

Base VPI - 300

Swap - 50

Header - 25

Suspension - 40

Sway Bars - 40

Splitter - 10

Air Dam - 10

Wing - 10

Floor? - 10

495 with the floor by my calculations. 

Add Diffuser - 10pts

Add Square Top Intake - 50pts

Add BP5A Cam - 50pts

Add some points for the non-OE shape hard top? - 5pts?

 

610pts from what I see.  

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21 minutes ago, Alchemy Autosport said:

 

Add Square Top Intake - 50pts

Add BP5A Cam - 50pts

 

J Spec BP4W came with those parts

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20 minutes ago, Alchemy Autosport said:

Add Diffuser - 10pts

Add Square Top Intake - 50pts

Add BP5A Cam - 50pts

Add some points for the non-OE shape hard top? - 5pts?

 

610pts from what I see.  

 

Wouldn't allowing the JDM motors rule they passed cover the cam since the motor is a JDM motor?

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36 minutes ago, Wink said:

J Spec BP4W came with those parts

 

36 minutes ago, Jab31169 said:

 

Wouldn't allowing the JDM motors rule they passed cover the cam since the motor is a JDM motor?

BP4W -'99 Miata engine is 140hp advertised.  3% of 140 is 4.2hp.  The square-top intake mani and cam are worth more than 4.2hp.

 

image.png.ba86720423312d59a6beb660bdfeafe3.png

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Wow, this got a lot of replies.

 

These were our points more or less the last few races.

 

Tech Points:

 

After Swap 350

Air Intake 0

Wing & Mounting Structure 10

Splitter 10

Airdam 10

Diffuser 10

Brake Cooling 0

Exhaust -

Brake Pads 0

ECU 0

Header 25

Radiator Screen 0

Coil Overs 40

Bushings 0

Front Sway Bar 20

Wheel Spacers 0

Interior Bulkheads 0

Metal 10

DIY Coolant Reroute 0

1.8L Fuel Tank 0 (In Swap)

Fiberglass Top 0 (OEM Profile)

Drivers Window Vent 0

4.3 Diff Ratio 0

Radiator Ducting 0 (repurposed)

Total 485

 

Diffuser - Tech Email

Coolant Reroute - Tech Email

Flywheel - Tech Email

Shocks 2x

Front Calipers 2x

Front Rotors 2x

Rear Calipers 2x

Rear Rotors 2x

Engine Paperwork

 

Swap Rules

Engine & Intake Manifold

Coil Pack Adapter

Coolant Temp Sensor Adapter

Throttle Cable Adapter

 

Moving forward we changed the following:

 

Front Sway Change to Stock Drilled : from 20 to 0

Flat Bottom: +10

Fastback: +10-15?

 

 

 

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1 minute ago, Alchemy Autosport said:

 

BP4W -'99 Miata engine is 140hp advertised.  3% of 140 is 4.2hp.  The square-top intake mani and cam are worth more than 4.2hp.

 

image.png.ba86720423312d59a6beb660bdfeafe3.png

 

They are worth more with the other mods for sure, but the factory HP rating is within the 3%.  

 

107 kW / 146 PS / 143 hp (JIS net) of power

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Doesn't this fall under not being the same construction as the USDM engine?? 

 

Those parts were not offered on the USDM 99 engine, in fact that cam didn't come to a Miata until the 2002 Mazdaspeed Miata, at least from what I've read.

 

I'd get a ruling from tech on that to be safe..

Edited by hotchkis23
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1 minute ago, hotchkis23 said:

Doesn't this fall under not being the same construction as the USDM engine?? 

 

Those parts were not offered on the USDM 99 engine, in fact that cam didn't come to a Miata until the 2002 Mazdaspeed Miata, at least from what I've read.

 

I'd get a ruling from tech on that to be safe..

Ahh hah! Another area more definition is required. Construction is quite a vague term, isnt it?

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1 minute ago, LuckyKid said:

 

They are worth more with the other mods for sure, but the factory HP rating is within the 3%.  

 

107 kW / 146 PS / 143 hp (JIS net) of power

Very interesting!  From what I understand, the BP5A differences to the BP4W are the Square-Top intake, the Intake Cam and the 3-2-1 exhaust header and the internals are all the same.  I am curious to what the JIS to SAE HP conversion is.  Also, there are different emissions standards in Japan (more strict, as we know) so I have to imagine they choke the engines more in the ECU.  I am not attempting to call you out.  I think its smart!

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7 minutes ago, Alchemy Autosport said:

Very interesting!  From what I understand, the BP5A differences to the BP4W are the Square-Top intake, the Intake Cam and the 3-2-1 exhaust header and the internals are all the same.  I am curious to what the JIS to SAE HP conversion is.  Also, there are different emissions standards in Japan (more strict, as we know) so I have to imagine they choke the engines more in the ECU.  I am not attempting to call you out.  I think its smart!

We just bought it since it was the most readily available at the time.  We never thought we would be competitive with the 1.8L and assumed we'd be ecotec by now.  Our plan was just to start with the 1.8L since its what we knew, get the car dialed in and swap to ecotec before Road America.  With Mazda contingency is on the table we are sticking with it for now.   Even a blind squirrel finds a nut!

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Parts Badger Team,

 

I appreciate your transparency on this. When we saw times at Sebring of 2:33.xx and we had Preston Pardus, Jim Drago 2x, Todd Buras (All Spec Miata National Champions), myself, and some other Spec Miata front runners that have properly built A class cars ... we were skeptical of how you were running three seconds faster than my best time of a 2:36xx.  Not saying we are all Lewis Hamilton out there, but I think its safe to say we know how to drive Miatas, so we knew it could not have been three seconds worth of talent.  You didn't have to share everything, but it definitely brings to light that the standard for A class should be set at, so thank you. Looks like we have some work to do on the #412 Level One Miata.

 

P.S.: Love to see so many 5xRacing parts on the car :) 

Thanks again,

John Davison

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21 hours ago, hotchkis23 said:

Doesn't this fall under not being the same construction as the USDM engine?? 

Those parts were not offered on the USDM 99 engine, in fact that cam didn't come to a Miata until the 2002 Mazdaspeed Miata, at least from what I've read.

I'd get a ruling from tech on that to be safe..


From what I have heard, the "same construction" basically means that it is not a change of block material or SOHC to DOHC. It is left rather vague because it is not meant to be particularly restrictive since you are still claiming correct engines rated HP. 

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