LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently April 27, 2024, 8:23 pm

Board index » Build Logs » The Builders Log

All times are UTC - 5 hours [ DST ]



Post new topic Reply to topic  Page 8 of 11
  [ 153 posts ]  Go to page Previous  1 ... 5, 6, 7, 8, 9, 10, 11  Next
  Print view Previous topic | Next topic 
Author Message
RTz
PostPosted: November 19, 2023, 10:12 am 
Offline
User avatar

Joined: July 7, 2011, 12:17 am
Posts: 550
Location: Oregon City, OR
Miatav8,MstrASE,A&P,F wrote:
May bonk yer noggin' if you get tagged from the rear or side on the forward swept style bar. It does look better forward swept.

Yes, mine is much the same. I was driving walking speed through a crowd of people while leaving a car show and one passerby sarcastically commented "of COURSE you just HAVE to wear a HELMET". I tipped my head/helmet firmly into the hoop loud enough to make a good 'craaack'. Passerby says "Ooohhhh, okay".

_________________
Peace, Ron
Top
 Profile  
Reply with quote  
doommachine
PostPosted: November 19, 2023, 10:48 am 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
Miatav8,MstrASE,A&P,F wrote:
doommachine wrote:
https://www.instagram.com/reel/CzzIJbXPSOS/?igshid=NzBmMjdhZWRiYQ==

Video update


May bonk yer noggin' if you get tagged from the rear or side on the forward swept style bar. It does look better forward swept.



I don't think it to be likely with my build. I have the longer cockpit space but am only 5'7". going to have my seat a bit forward when actually driving but able to slide back for easier ingress egress due to my disability. The height is plenty high to allow a helmet to clear a broomstick test. Also my plates are pretty large compared to some others so it is further back than it may first appear. All in all I don't think it will be an issue, but ya never know.
Top
 Profile  
Reply with quote  
tibimakai
PostPosted: November 20, 2023, 2:47 am 
Offline
User avatar

Joined: January 14, 2021, 12:19 pm
Posts: 463
Location: San Dimas, CA
This is how I cut my tubes for fish mouth.
For straight angle cuts, I use the vise base, that can be set at the right angle.


You do not have the required permissions to view the files attached to this post.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress
Top
 Profile  
Reply with quote  
Miatav8,MstrASE,A&P,F
PostPosted: November 20, 2023, 7:21 am 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 8045
RTz wrote:
Miatav8,MstrASE,A&P,F wrote:
May bonk yer noggin' if you get tagged from the rear or side on the forward swept style bar. It does look better forward swept.

Yes, mine is much the same. I was driving walking speed through a crowd of people while leaving a car show and one passerby sarcastically commented "of COURSE you just HAVE to wear a HELMET". I tipped my head/helmet firmly into the hoop loud enough to make a good 'craaack'. Passerby says "Ooohhhh, okay".


I'd say, "That's not what your mom said" since I'm so mature and sophisticated (for a mech). Then he kicks the car. There are no winners here. Try not to get any on you. :lol:

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12
Top
 Profile  
Reply with quote  
RTz
PostPosted: November 20, 2023, 9:48 am 
Offline
User avatar

Joined: July 7, 2011, 12:17 am
Posts: 550
Location: Oregon City, OR
Miatav8,MstrASE,A&P,F wrote:
I'd say, "That's not what your mom said" since I'm so mature and sophisticated (for a mech). Then he kicks the car. There are no winners here. Try not to get any on you. :lol:


:mrgreen: :mrgreen: :mrgreen:

_________________
Peace, Ron
Top
 Profile  
Reply with quote  
doommachine
PostPosted: November 25, 2023, 1:56 pm 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
can anything be done in the rear with the X roll canter. I got the front what seems to be pretty good, but still trying to get design more or less figured out geometrically before I make up the jig

Need to figure out how much camber gain I want but not sure how much roll I will have.

Doommachine 11162023
Top
 Profile  
Reply with quote  
doommachine
PostPosted: November 25, 2023, 4:33 pm 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
https://instagram.com/stories/matthew.k ... E2YTYwMA==

Video update. Getting differential positioned and suspension pickup points figured out. Since I am using a 225/45r15 I have to have the pickup points 2.5" higher than plans. That puts the loer arm level at 5" ride height
Top
 Profile  
Reply with quote  
RTz
PostPosted: November 25, 2023, 4:54 pm 
Offline
User avatar

Joined: July 7, 2011, 12:17 am
Posts: 550
Location: Oregon City, OR
In case you aren’t aware the two little notches circled below area a designed-in failure point intended to save the unibody of damage from minor accidents. Power improvements sometimes cause the diff to break in that location. With the Duratec I expect you’ll be making a good bit more torque than a stock Miata so it may deserve some attention. Inexpensive weld-in reinforcement plates are available.


You do not have the required permissions to view the files attached to this post.

_________________
Peace, Ron
Top
 Profile  
Reply with quote  
GTIspirit
PostPosted: November 28, 2023, 8:47 pm 
Offline

Joined: November 26, 2023, 6:37 pm
Posts: 9
Location: Southeast Michigan
doommachine wrote:
Build cost tracker link: https://docs.google.com/spreadsheets/d/ ... sp=sharing
Instagram updates: Matthew.Kohl.90

Been poking around the forums and FB page and it is time to start up my build log.

My name is Matt and I am located on the central coast of California. I am Building a 442 chassis based on Haynes, Voduu, and McSorley plans

Parts: NB miata uprights, Differential 4.30 ratio, Brakes, steering, and other bits
NC miata 5 speed transmission and drive shaft
2.5L Duratec engine,

I have a bad left knee so some design adjustments may be made to facilitate ingress/egress due to my poor lower left leg extension strength and limited knee flex of about 110 degrees

as of 8/14/23 I have completed my build table and the steel was delivered today! Major parts to be sourced within the next few months from nearby wrecking yards and other parts from KineticVehicles.

My Dream many years ago now, was to build and sell these cars after I retired. However, in 2016 I was in a significant motorcycle accident and the dream seemed dead forever. I had picked up my 4th miata (2016 ND) in mid 2020 but it wasn't getting enough drive time and I didn't really feel like laying out the money to get it really track ready. So about a month ago now I put the ND up for sale, started collecting tools and source material, and am going to take a crack at making this nearly lost dream come true!


Great thread! :cheers:

How will the NB differential hold up behind the Duratec 2.5l?
Top
 Profile  
Reply with quote  
doommachine
PostPosted: November 29, 2023, 5:46 pm 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
Will be fine. The 5-speed with go before the diff. As people mention about the notch being source of failure, that is cars on track or in a collision. People put significant power through stock diffs. And the 2.5 will top out aroind 260hp after full mods down the road. Starting closer to 200-210.

I will probably have plates welded onto my diff carrier, but not that concerned
Top
 Profile  
Reply with quote  
GTIspirit
PostPosted: November 29, 2023, 7:50 pm 
Offline

Joined: November 26, 2023, 6:37 pm
Posts: 9
Location: Southeast Michigan
Great to know! One of the concerns from GBS about using a Duratec 2.0 in place of the NB 1.8l on their USA SVD kit was NB rear diff capability. They thought the limit was around 200hp. My goal was slightly more moderate, maybe 180hp, so this gives me confidence in putting a slightly built Duratec 2.0 with NC trans ahead of an NB diff.
Top
 Profile  
Reply with quote  
doommachine
PostPosted: November 30, 2023, 9:25 pm 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
That os totally.unfounded. tons of people run 250+ hp on stock diffs. The 5-speed can shred itself at that level, but having been a miata person for pver 20 years, I don't think it is a big deal at all. Under specific conditions the case can fail at that notch, but it is under specific conditions of heavy load, usually under competition or impact
Top
 Profile  
Reply with quote  
RTz
PostPosted: November 30, 2023, 9:54 pm 
Offline
User avatar

Joined: July 7, 2011, 12:17 am
Posts: 550
Location: Oregon City, OR
I’ll second Doom’s thoughts. 200hp isn’t going to break the diffs internals. What breaks things is torque plus traction (or shock loads). Plenty of Miata’s are making more than 250 ft/lbs of torque and the diffs holds up long term. I wouldn’t be concerned until far past the 300ft/lb mark. Transmissions are the first to go at elevated torque numbers (typically reliable until you exceed 250 ft/lbs). The weak point is the notches in the mount and that can easily be mitigated.

_________________
Peace, Ron
Top
 Profile  
Reply with quote  
Briggs2
PostPosted: December 1, 2023, 7:54 am 
Offline

Joined: October 19, 2023, 8:40 am
Posts: 18
Sorry if you covered this before. Are you using a NC 5 speed trans or a NA/NB? If using the older model 5 speed, how did you adapt it to the Duratec?

Thanks!
Top
 Profile  
Reply with quote  
doommachine
PostPosted: December 3, 2023, 7:13 pm 
Offline
User avatar

Joined: July 8, 2023, 2:08 pm
Posts: 158
Location: Atascadero, California
Briggs2 wrote:
Sorry if you covered this before. Are you using a NC 5 speed trans or a NA/NB? If using the older model 5 speed, how did you adapt it to the Duratec?

Thanks!


NC 5-speed and nc driveshaft. The adaption to the NB diff will happen with the driveshaft when I have it shortened
Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 8 of 11
  [ 153 posts ]  Go to page Previous  1 ... 5, 6, 7, 8, 9, 10, 11  Next

Board index » Build Logs » The Builders Log

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 13 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
POWERED_BY