Author Topic: All great things have a beginning  (Read 24400 times)

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #735 on: November 27, 2020, 03:26:49 PM »
Started cutting the crap off the rack but got bored quickly, simply don't have a big enough chisel

So I decided to start cutting pipe instead for the front end

With a little bit of CTAD (Cable Tie Aided Design)

Cut the lower bar also and started cutting and notching the support bars to go between the upp and lower but my drill decided to set on fire

Don't know why people need those fancy tube notchers, iv managed just fine with a hole saw, set square and a tape measure

Progress haulted for now however I need my drill for work tonight ffs going have to steal my dads

Sent from my VOG-L09 using Tapatalk


Offline clive

  • MRC Founder
  • Administrator
  • Major Contributor
  • *****
  • Location: Kent
  • Posts: 11,560
  • Karma: +31/-0
    • View Profile
    • http://mazdarotaryparts.com
Re: All great things have a beginning
« Reply #736 on: November 28, 2020, 01:50:55 PM »
Sorry Grant, the racks no good for you, it a fluid NC rack so you wont gain anything :(   
All the best Clive

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #737 on: November 28, 2020, 02:50:39 PM »
Sorry Grant, the racks no good for you, it a fluid NC rack so you wont gain anything :(   
Just a standard nc rack? I'm going to be swapping back the the nc subframe as the rx8 rack won't work without a lot of cutting and faffing around.

Plus the nc rack is a lot smaller and lighter

Sent from my VOG-L09 using Tapatalk


Offline clive

  • MRC Founder
  • Administrator
  • Major Contributor
  • *****
  • Location: Kent
  • Posts: 11,560
  • Karma: +31/-0
    • View Profile
    • http://mazdarotaryparts.com
Re: All great things have a beginning
« Reply #738 on: November 28, 2020, 05:21:12 PM »
Sorry Grant, the racks no good for you, it a fluid NC rack so you wont gain anything :(   
Just a standard nc rack? I'm going to be swapping back the the nc subframe as the rx8 rack won't work without a lot of cutting and faffing around.

Plus the nc rack is a lot smaller and lighter


I thought the NC and RX-8 rack mounts would have been the same so bought this one off ebay and found it mounts completly different!.
All the best Clive

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #739 on: November 28, 2020, 06:56:15 PM »
Iv got one already left over from when I stripped the mx5

Sent from my VOG-L09 using Tapatalk


Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #740 on: November 29, 2020, 02:56:58 PM »
The term measure twice cut once couldn't have been a better rule to live by today last piece of tube...

Good job iv got some box to use

Sent from my VOG-L09 using Tapatalk


Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #741 on: November 29, 2020, 03:56:29 PM »
Just need some super glue now

Sent from my VOG-L09 using Tapatalk


Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #742 on: November 29, 2020, 03:58:12 PM »
Going to cut 2 more upright as I can use those for mounting points for the rad and fuel cell, there's a bit of angle to the top to the bottom which I'd fine for the rad but not for the fuel so will have space the top out a little bit

Sent from my VOG-L09 using Tapatalk


Offline Mr Spiller

  • MRC Full Club Member
  • Major Contributor
  • *****
  • Posts: 814
  • Karma: +3/-0
  • Just joined!
    • View Profile
Re: All great things have a beginning
« Reply #743 on: November 29, 2020, 04:18:32 PM »
Very neat


Sent from my iPhone using Tapatalk

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #744 on: December 04, 2020, 12:47:06 PM »
Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk

Offline Mr Spiller

  • MRC Full Club Member
  • Major Contributor
  • *****
  • Posts: 814
  • Karma: +3/-0
  • Just joined!
    • View Profile
Re: All great things have a beginning
« Reply #745 on: December 04, 2020, 04:45:36 PM »
Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk
Ok
What does that mean to normal people ?


Sent from my iPhone using Tapatalk

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #746 on: December 04, 2020, 05:41:21 PM »
Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk
Ok
What does that mean to normal people ?


Sent from my iPhone using Tapatalk
Prety much same as piston engines really.

With lower comp you reduce the likelihood of detonation, albeit you will most likely make less hp with a lower compression ratio you can make it back up with a bit more boost pressure

Plus if you think about it a lower comp engine has more volume to fill with air and fuel

F1 turbo cars used to run low compression and big boost but iirc they started limiting the amount of boost they could run so to counter act the lower boost pressures they increased the compression ratio to make hp. Obviously they used magic fuel too to suppress any det.

The low comp rotors are slightly heavier than other rotors, however that means they can have material removed which I intend to have the rotors side clearence, lightened, scalloped and balanced.

The scalloping will lower the compression also, and if I get the face of the rotors machined too that will lower the compression also.

From what iv been googling, you tubing the machining of the rotor faces is a great thing to do as it just gives that bit of. Gap between the face and the rotor housing if under high boost the rotors decide to wobble a bit.

Sent from my VOG-L09 using Tapatalk


Offline Mr Spiller

  • MRC Full Club Member
  • Major Contributor
  • *****
  • Posts: 814
  • Karma: +3/-0
  • Just joined!
    • View Profile
Re: All great things have a beginning
« Reply #747 on: December 04, 2020, 05:57:28 PM »
Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk
Ok
What does that mean to normal people ?


Sent from my iPhone using Tapatalk
Prety much same as piston engines really.

With lower comp you reduce the likelihood of detonation, albeit you will most likely make less hp with a lower compression ratio you can make it back up with a bit more boost pressure

Plus if you think about it a lower comp engine has more volume to fill with air and fuel

F1 turbo cars used to run low compression and big boost but iirc they started limiting the amount of boost they could run so to counter act the lower boost pressures they increased the compression ratio to make hp. Obviously they used magic fuel too to suppress any det.

The low comp rotors are slightly heavier than other rotors, however that means they can have material removed which I intend to have the rotors side clearence, lightened, scalloped and balanced.

The scalloping will lower the compression also, and if I get the face of the rotors machined too that will lower the compression also.

From what iv been googling, you tubing the machining of the rotor faces is a great thing to do as it just gives that bit of. Gap between the face and the rotor housing if under high boost the rotors decide to wobble a bit.

Sent from my VOG-L09 using Tapatalk
That does make sense
I remember some early piston turbo engine being a lower compression
So where do they come from or are they made ?


Sent from my iPhone using Tapatalk

Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #748 on: December 04, 2020, 08:17:18 PM »
Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk
Ok
What does that mean to normal people ?


Sent from my iPhone using Tapatalk
Prety much same as piston engines really.

With lower comp you reduce the likelihood of detonation, albeit you will most likely make less hp with a lower compression ratio you can make it back up with a bit more boost pressure

Plus if you think about it a lower comp engine has more volume to fill with air and fuel

F1 turbo cars used to run low compression and big boost but iirc they started limiting the amount of boost they could run so to counter act the lower boost pressures they increased the compression ratio to make hp. Obviously they used magic fuel too to suppress any det.

The low comp rotors are slightly heavier than other rotors, however that means they can have material removed which I intend to have the rotors side clearence, lightened, scalloped and balanced.

The scalloping will lower the compression also, and if I get the face of the rotors machined too that will lower the compression also.

From what iv been googling, you tubing the machining of the rotor faces is a great thing to do as it just gives that bit of. Gap between the face and the rotor housing if under high boost the rotors decide to wobble a bit.

Sent from my VOG-L09 using Tapatalk
That does make sense
I remember some early piston turbo engine being a lower compression
So where do they come from or are they made ?


Sent from my iPhone using Tapatalk
Theu come from the series 4 rx7, 84-88 I think

Sent from my VOG-L09 using Tapatalk


Offline Grant Monkhouse

  • Karma Chameleon
  • Global Moderator
  • Major Contributor
  • *****
  • Posts: 5,005
  • Karma: +1/-65535
  • I am awesome
    • View Profile
Re: All great things have a beginning
« Reply #749 on: December 04, 2020, 09:40:12 PM »
Hopefully be able to get my rotors looking like this

Sent from my VOG-L09 using Tapatalk