All great things have a beginning

[Grant Monkhouse]

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

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[clive]

Sorry Grant, the racks no good for you, it a fluid NC rack so you wont gain anything    

[Grant Monkhouse]

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

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[clive]

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!.

[Grant Monkhouse]

Iv got one already left over from when I stripped the mx5

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[Grant Monkhouse]

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

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[Grant Monkhouse]

Just need some super glue now

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[Grant Monkhouse]

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

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[Mr Spiller]

Very neat


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[Grant Monkhouse]

Just purchased some low comp 8.5:1 rotors

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[Mr Spiller]

Just purchased some low comp 8.5:1 rotors

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Ok
What does that mean to normal people ?


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[Grant Monkhouse]

Just purchased some low comp 8.5:1 rotors

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Ok
What does that mean to normal people ?


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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.

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[Mr Spiller]

Just purchased some low comp 8.5:1 rotors

Sent from my VOG-L09 using Tapatalk

Ok
What does that mean to normal people ?


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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.

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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 ?


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[Grant Monkhouse]

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 ?


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Theu come from the series 4 rx7, 84-88 I think

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[Grant Monkhouse]

Hopefully be able to get my rotors looking like this

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