MCast - GT4 Race Conversion

Azeka1 · 08-12-2020, 11:14 AM

Awesome progress! I met the owner of the shop where your car is at while in VIR for BMW Race School. What are your plans with these cars?

Z4 = AER?
Z4M = C-Mod? GTS3?

M-Cast · 08-12-2020, 11:36 AM

Quote:

Originally Posted by Azeka1

Awesome progress! I met the owner of the shop where your car is at while in VIR for BMW Race School. What are your plans with these cars?

Z4 = AER?
Z4M = C-Mod? GTS3?

That is correct. The 3.0 will run in HP for testing in CCA and then focused on AER.

The Z4M is a C-Mod car for CCA, depending on Specs we might be in GTS3 or GTS2 in NASA. C-Mod is mostly based on displacement with no weight restrictions and the car is estimated to be around 2600 lbs with HP around 445/385 so I am not sure where that will land us.

3GFX · 08-13-2020, 08:20 AM

Fantastic progress, that rear suspension is glorious! Subbing to follow!

M-Cast · 09-13-2020, 02:31 PM

Been awhile since we have updated on this here, but making nice progress on both cars. Took the 3.0si out for its first shake down and it went very well after a few adjustments. The only complaint I have is the rev range and power. I am still waiting on the full exhaust and then I can add the epic tune. I am also going to swap out the six speed Z4 for a five speed which should also help. The car will be a great endurance car in the end as it runs all day with no issues.

I finally got the main car into the cage shop and the carbon body is being picked up for shipping to the US this week. Engine is almost finished with larger pistons, a little head work, adding a Tilton flywheel/clutch and went with bigger cams this round. I also added a larger oil-cooler from Zionsville.

M-Cast · 09-13-2020, 02:33 PM

Sorry for mixing them up, I have more coming on both cars.

racerbruce · 09-13-2020, 05:21 PM

M-Cast -
Thank you for updating the progress on both Z4's and the great progress pics; these are such great projects that some of us can only dream about.

pyshin · 09-14-2020, 04:58 PM

Thanks for the update!

Looks like the aero came in as well, excited to read your thoughts on quality and fitment.

Vanne · 09-17-2020, 01:36 AM

Great update, the kit looks really good

M-Cast · 09-20-2020, 07:13 AM

Found a decent picture of what the final kit will look like.

F360C · 10-08-2020, 08:57 AM

Quote:

Originally Posted by M-Cast

Found a decent picture of what the final kit will look like.

Really interested to see this kit installed on your car as like you said it is near impossible to find pics of it.

The final weight of the kit and how hard the install is will determine if it is worth me going this route too.

M-Cast · 10-08-2020, 08:03 PM

Quote:

Originally Posted by F360C

Quote:

Originally Posted by M-Cast

Found a decent picture of what the final kit will look like.

Really interested to see this kit installed on your car as like you said it is near impossible to find pics of it.

The final weight of the kit and how hard the install is will determine if it is worth me going this route too.

Quote:

Originally Posted by F360C

Quote:

Originally Posted by M-Cast

Found a decent picture of what the final kit will look like.

Really interested to see this kit installed on your car as like you said it is near impossible to find pics of it.

The final weight of the kit and how hard the install is will determine if it is worth me going this route too.

Finally got notice of shipping, I am hoping to have this car ready by the end of the year. The 3.0si is about 90% completed and planned for it first CCA club race in December

M-Cast · 10-08-2020, 08:06 PM

Quote:

Originally Posted by M-Cast

Quote:

Originally Posted by F360C

Quote:

Originally Posted by M-Cast

Found a decent picture of what the final kit will look like.

Really interested to see this kit installed on your car as like you said it is near impossible to find pics of it.

The final weight of the kit and how hard the install is will determine if it is worth me going this route too.

Quote:

Originally Posted by F360C

Quote:

Originally Posted by M-Cast

Found a decent picture of what the final kit will look like.

Really interested to see this kit installed on your car as like you said it is near impossible to find pics of it.

The final weight of the kit and how hard the install is will determine if it is worth me going this route too.

Finally got notice of shipping, I am hoping to have this car ready by the end of the year. The 3.0si is about 90% completed and planned for it first CCA club race in December

First picks before shipping

F360C · 10-09-2020, 08:50 AM

Quote:

Originally Posted by M-Cast

First picks before shipping

These pics are drool worthy!

racerbruce · 10-10-2020, 09:48 AM

GO M-Cast!
Such a build.

M-Cast · 12-04-2020, 12:27 PM

Finally received the kit in from Goke and am pleased to say the parts look great and come with all the hardware. Worth the wait, I am getting ready to look at moving forward with a group buy soon once I get volume pricing back.

Planning on starting initial fitment in the coming weeks. The 3.0si is coming back from the cage shop this weekend and heading to Roebling next week for its first race.

pyshin · 12-04-2020, 12:45 PM

Awesome! Can't wait to participate in the group buy.

ANILE8 · 12-23-2020, 10:08 PM

Quote:

Originally Posted by M-Cast

New Rear Suspension is in and should have this back to a rolling chassis so I can get it back to the fab shop next week.

Why did you only go for poly subframe bushings and not solid?

M-Cast · 12-25-2020, 05:06 AM

Quote:

Originally Posted by ANILE8

Quote:

Originally Posted by M-Cast

New Rear Suspension is in and should have this back to a rolling chassis so I can get it back to the fab shop next week.

Why did you only go for poly subframe bushings and not solid?

Quote:

Originally Posted by ANILE8

Quote:

Originally Posted by M-Cast

New Rear Suspension is in and should have this back to a rolling chassis so I can get it back to the fab shop next week.

Why did you only go for poly subframe bushings and not solid?

The AKG 75ds are marble hard but also provide some protection. I have solid trans mounts but use the 75ds on the motor and subframe. We have seen way to many guys come back with cracked subframes after contact on track. The benefit of solid vs the AKG reds is not noticeable except for less damage.

racerbruce · 12-26-2020, 06:57 AM

Wowie M-Cast!
For the unlearned, a few questions....

-Is the kit CF or fiberglass?
-Estimated weight savings?
-Appx cost?

Regards
Racebruce

M-Cast · 12-26-2020, 11:19 AM

Quote:

Originally Posted by racerbruce

Wowie M-Cast!
For the unlearned, a few questions....

-Is the kit CF or fiberglass?
-Estimated weight savings?
-Appx cost?

Regards
Racebruce

It's a big weight savings off the OEM parts.

https://sxmotorsports.com/z4-perform...ckages/z4m-gt4

I am putting together multiple versions and mod packages for those who are I interested. The prices include import taxes and shipping to the US.

We have been able to cut 200 to 300 lbs out of car with no problem. More depending on usage and how much you want to spend.

Just as a reference for every 100lbs we cut its equivalent to about 25 to 35hp

racerbruce · 12-26-2020, 11:22 AM

Quote:

Originally Posted by M-Cast

It's a big weight savings off the OEM parts.

https://sxmotorsports.com/z4-perform...ckages/z4m-gt4

I am putting together multiple versions and mod packages for those who are I interested. The prices include import taxes and shipping to the US.

We have been able to cut 200 to 300 lbs out of car with no problem. More depending on usage and how much you want to spend.

Just as a reference for every 100lbs we cut its equivalent to about 25 to 35hp

Wowie M-Cast!
And to think that the weight savings is located high in the car and how this must affect its center of gravity and enhanced handling....wow!

Vanne · 05-29-2021, 01:48 AM

Hey bud, you need to update this thread. Pics of those arms and new wing are sublime.
Those arms are sex on a stick mate.
Hows the build coming along?

08-12-2020, 11:14 AM	#45
Azeka1 Lieutenant 286 Rep 431 Posts Drives: E86 M Coupe Join Date: Jun 2017 Location: NJ iTrader: (2) Garage List 2013 BMW M3 Competi ... [0.00] 1995 BMW M3 IP Race ... [0.00] 2006 BMW Z4M Coupe [8.00]	Awesome progress! I met the owner of the shop where your car is at while in VIR for BMW Race School. What are your plans with these cars? Z4 = AER? Z4M = C-Mod? GTS3? __________________ 1995 E36 M3 \| BMW CCA Club Racer - IP #34 \| Gray / Blue / Orange \| 261WHP \| 2,700lbs 2013 E92 M3 Competition 6MT Slick Top \| AW / Fox Red \| 2006 E86 M Coupe \| Silver Gray / Imola \| JRZ RSTWO \| APR Aero \| Sparco Seats/Belts \| Weichers Cage Gone: 2017 Audi Q7 \| 2011 E93 328i 6MT \| 2014 Audi A6 \| 2010 VW CC 2.0T \| 2011 G37 S Coupe 6MT \| 2004 G35 Coupe \| SW20 MR2 Widebody Turbo
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08-13-2020, 08:20 AM	#47
3GFX Captain 723 Rep 912 Posts Drives: 2003 BMW Z4 3.0i Join Date: Sep 2015 Location: Ontario iTrader: (0)	Fantastic progress, that rear suspension is glorious! Subbing to follow!
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09-13-2020, 02:31 PM	#48
M-Cast Lieutenant 708 Rep 506 Posts Drives: 2007 M Coupe Join Date: Nov 2015 Location: Atlanta GA iTrader: (4) Garage List 2007 E86 Coupe [0.00] 2006 Z4 3.0si Coupe [6.00] 2002 330 CI [0.00] 2018 BMW 240M [0.00] 2007 M Coupe [10.00]	Been awhile since we have updated on this here, but making nice progress on both cars. Took the 3.0si out for its first shake down and it went very well after a few adjustments. The only complaint I have is the rev range and power. I am still waiting on the full exhaust and then I can add the epic tune. I am also going to swap out the six speed Z4 for a five speed which should also help. The car will be a great endurance car in the end as it runs all day with no issues. I finally got the main car into the cage shop and the carbon body is being picked up for shipping to the US this week. Engine is almost finished with larger pistons, a little head work, adding a Tilton flywheel/clutch and went with bigger cams this round. I also added a larger oil-cooler from Zionsville. Attached Images
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09-13-2020, 02:33 PM	#49
M-Cast Lieutenant 708 Rep 506 Posts Drives: 2007 M Coupe Join Date: Nov 2015 Location: Atlanta GA iTrader: (4) Garage List 2007 E86 Coupe [0.00] 2006 Z4 3.0si Coupe [6.00] 2002 330 CI [0.00] 2018 BMW 240M [0.00] 2007 M Coupe [10.00]	Sorry for mixing them up, I have more coming on both cars. Attached Images
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09-13-2020, 05:21 PM	#50
racerbruce Brigadier General 3850 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	M-Cast - Thank you for updating the progress on both Z4's and the great progress pics; these are such great projects that some of us can only dream about. __________________ Racerbruce
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09-14-2020, 04:58 PM	#51
pyshin Private First Class 111 Rep 160 Posts Drives: 97c2 Join Date: May 2020 Location: socal iTrader: (1)	Thanks for the update! Looks like the aero came in as well, excited to read your thoughts on quality and fitment.
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09-17-2020, 01:36 AM	#52
Vanne Down Under!! 1621 Rep 4,294 Posts Drives: 2007 Z4MC Join Date: Mar 2013 Location: Dubai iTrader: (4)	Great update, the kit looks really good __________________ 2007 EuroSpec Z4///MC - Building/Developing Z4 GT3 Powered by
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09-20-2020, 07:13 AM	#53
M-Cast Lieutenant 708 Rep 506 Posts Drives: 2007 M Coupe Join Date: Nov 2015 Location: Atlanta GA iTrader: (4) Garage List 2007 E86 Coupe [0.00] 2006 Z4 3.0si Coupe [6.00] 2002 330 CI [0.00] 2018 BMW 240M [0.00] 2007 M Coupe [10.00]	Found a decent picture of what the final kit will look like. Attached Images
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10-10-2020, 09:48 AM	#58
racerbruce Brigadier General 3850 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	GO M-Cast! Such a build. __________________ Racerbruce
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12-04-2020, 12:27 PM	#59
M-Cast Lieutenant 708 Rep 506 Posts Drives: 2007 M Coupe Join Date: Nov 2015 Location: Atlanta GA iTrader: (4) Garage List 2007 E86 Coupe [0.00] 2006 Z4 3.0si Coupe [6.00] 2002 330 CI [0.00] 2018 BMW 240M [0.00] 2007 M Coupe [10.00]	Finally received the kit in from Goke and am pleased to say the parts look great and come with all the hardware. Worth the wait, I am getting ready to look at moving forward with a group buy soon once I get volume pricing back. Planning on starting initial fitment in the coming weeks. The 3.0si is coming back from the cage shop this weekend and heading to Roebling next week for its first race. Attached Images
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12-04-2020, 12:45 PM	#60
pyshin Private First Class 111 Rep 160 Posts Drives: 97c2 Join Date: May 2020 Location: socal iTrader: (1)	Awesome! Can't wait to participate in the group buy.
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12-26-2020, 06:57 AM	#63
racerbruce Brigadier General 3850 Rep 3,004 Posts Drives: 21 X3 & 13 335is E93 Join Date: Dec 2009 Location: Seattle iTrader: (1)	Wowie M-Cast! For the unlearned, a few questions.... -Is the kit CF or fiberglass? -Estimated weight savings? -Appx cost? Regards Racebruce __________________ Racerbruce
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05-29-2021, 01:48 AM	#66
Vanne Down Under!! 1621 Rep 4,294 Posts Drives: 2007 Z4MC Join Date: Mar 2013 Location: Dubai iTrader: (4)	Hey bud, you need to update this thread. Pics of those arms and new wing are sublime. Those arms are sex on a stick mate. Hows the build coming along? __________________ 2007 EuroSpec Z4///MC - Building/Developing Z4 GT3 Powered by
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