carmudgeons.com  

Go Back   carmudgeons.com > Automotive Forums > Going Faster

Reply
 
Thread Tools Display Modes
Old 02-03-2018, 07:00 PM   #41
Nick M3
Relic
 
Nick M3's Avatar
 
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,438
How is the MX-5 transmission so heavy?!?!?
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Nick M3 is offline   Reply With Quote
Old 02-03-2018, 07:10 PM   #42
rumatt
Mugwump
 
rumatt's Avatar
 
Join Date: Oct 2003
Carmudgeonly Ride: E46 330i, Chevy Colorado, Tesla Model 3
Location: NY
Posts: 17,475
Can you help me untangle the wires behind my television entertainment center?








But seriously. Holy shit man. This is intense. I'm staring at the wiring shots thinking maybe you're just messing with us.

Thanks for documenting this. It's really cool to watch.
rumatt is offline   Reply With Quote
Old 02-03-2018, 07:51 PM   #43
clyde
Chief title editor
 
clyde's Avatar
 
Join Date: Oct 2003
Posts: 26,599
I'm not sure those that don't know JV personally really understand what things like "I've checked every wire a bunch" really mean.

The built car is going to be amazing in execution. I so, so, so, hope the performance matches.
__________________
OH NOES!!!!!1 MY CAR HAS T3H UND3R5T33R5555!!!!!!1oneone!!!!11

Team WTF?!
What are you gonna do?
clyde is offline   Reply With Quote
Old 02-03-2018, 08:17 PM   #44
bren
lawn boy
 
bren's Avatar
 
Join Date: Oct 2003
Carmudgeonly Ride: e46m3, f25x3,C5 Z06, C4 Vette, 06 CTD Ram, and a trailer
Location: Maryland
Posts: 14,029
Quote:
Originally Posted by rumatt View Post
Can you help me untangle the wires behind my television entertainment center?
bren is offline   Reply With Quote
Old 02-04-2018, 01:53 PM   #45
Alan
Carmudgeon
 
Join Date: Apr 2005
Posts: 4,646
Quote:
Originally Posted by rumatt View Post
Can you help me untangle the wires behind my television entertainment center?


But seriously. Holy shit man. This is intense. I'm staring at the wiring shots thinking maybe you're just messing with us.

Thanks for documenting this. It's really cool to watch.
Lol hat is funny

Also agree with the comments ... very cool to watch. It really amazes me that John is literally building his own car ...
Alan is offline   Reply With Quote
Old 02-05-2018, 08:27 AM   #46
John V
No more BMWs
 
John V's Avatar
 
Join Date: Apr 2005
Carmudgeonly Ride: Ram, MS3, CX-5, RX-8
Location: Glenwood, MD
Posts: 14,753
Quote:
Originally Posted by Nick M3 View Post
How is the MX-5 transmission so heavy?!?!?
It's big?

The NC 6-speed is a pretty stout transmission, so maybe that's it? I don't really know. The RX-8 6-speed is essentially the same transmission with different gear ratios and a different bellhousing bolt pattern and it weighs the same.

Interestingly the K-Miata folks have come up with an adapter to use a 320Z with the Honda K motor. I would actually have loved to do that with the RX-8 but it would be a lot of work and the FC/FD RX-7 transmission is strong. My only concern is availability - RX-7s are getting old and it's getting harder to find transmissions. I think at some point I'll probably have a Jerico in the car but for now this will be a good solution.
John V is offline   Reply With Quote
Old 02-05-2018, 08:30 AM   #47
Nick M3
Relic
 
Nick M3's Avatar
 
Join Date: Oct 2003
Location: Bethesda, MD
Posts: 12,438
Quote:
Originally Posted by John V View Post
It's big?

The NC 6-speed is a pretty stout transmission, so maybe that's it? I don't really know. The RX-8 6-speed is essentially the same transmission with different gear ratios and a different bellhousing bolt pattern and it weighs the same.

Interestingly the K-Miata folks have come up with an adapter to use a 320Z with the Honda K motor. I would actually have loved to do that with the RX-8 but it would be a lot of work and the FC/FD RX-7 transmission is strong. My only concern is availability - RX-7s are getting old and it's getting harder to find transmissions. I think at some point I'll probably have a Jerico in the car but for now this will be a good solution.
I’m utterly puzzled as to why Mazda would put such a big, heavy, stout transmission in the Miata, though. I mean, the Getrag 420G is quite a bit less than 110lbs. for example.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Nick M3 is offline   Reply With Quote
Old 02-05-2018, 08:51 AM   #48
John V
No more BMWs
 
John V's Avatar
 
Join Date: Apr 2005
Carmudgeonly Ride: Ram, MS3, CX-5, RX-8
Location: Glenwood, MD
Posts: 14,753
It could be because of the whole PPF thing. The transmission case has to be rigid and strong enough for the moment arm tying the transmission to the diff.

But yeah, I don't know.
John V is offline   Reply With Quote
Old 02-09-2018, 08:00 AM   #49
lemming
Western Anomaly
 
lemming's Avatar
 
Join Date: Oct 2003
Carmudgeonly Ride: White Orca
Posts: 16,582
the wiring alone looks daunting.

and did I see that you're gong to put a turbocharger on too!?
__________________


lemming is offline   Reply With Quote
Old 02-09-2018, 09:06 AM   #50
John V
No more BMWs
 
John V's Avatar
 
Join Date: Apr 2005
Carmudgeonly Ride: Ram, MS3, CX-5, RX-8
Location: Glenwood, MD
Posts: 14,753
Yes. Turbo on a 2.5L Duratec four cylinder running E85.

It should be good for 500-550hp at the crank before any detuning. Assuming I can get the car to ~ 2,600lbs or a little under, 4.7-5.2lbs/hp seems like it should move out pretty well while not upsetting the chassis balance or Cg of the RX-8 platform.
John V is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:51 PM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Forums © 2003-2008, 'Mudgeon Enterprises - Site hosting by AYN & Associates, LLC