Wayne's boosted 8 project

[Mr Spiller]

Right
Current hit rate is 10 hits and a sip of bud

Be quite Merry soon
Shoulders aching
Nearly there


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[Mr Spiller]

Ohhh that’s tight - just fits tho
Needs to be lower , such a waste of space



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[clive]

Couple of things.

Use the RX-8 box as the first four ratios are the same as an FD box with fifth just a little higher.

Don’t use the 6 speed box, I broke 4 and 2 while mapping !

Grant you can use an FD box in an 8 or visa versa, by changing the bell housing and tail shaft cover, so every thing stays in the correct places.

For 350 brake, stay with 1680 secondary’s and the lilac coloured 550cc for primarys (you will also find good MPG when off boost)
You wont need any more injector for that and I only use 1680 / 850's for 520 brake   

p.s. have 5mm off each flange face and that would help but I still think the sump will sit too low. ( I flattend two sumps on track)

[Grant Monkhouse]

Couple of things.

Use the RX-8 box as the first four ratios are the same as an FD box with fifth just a little higher.

Don’t use the 6 speed box, I broke 4 and 2 while mapping !

Grant you can use an FD box in an 8 or visa versa, by changing the bell housing and tail shaft cover, so every thing stays in the correct places.

For 350 brake, stay with 1680 secondary’s and the lilac coloured 550cc for primarys (you will also find good MPG when off boost)
You wont need any more injector for that and I only use 1680 / 850's for 520 brake   

p.s. have 5mm off each flange face and that would help but I still think the sump will sit too low. ( I flattend two sumps on track)

What do you have to change if you use an rx8 gear box bell housing on the fd gear box? Will the clutch need changing?

I'm definately going to get an rx8 5 speed gear box as fd ones sell for a lot more

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[clive]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.   

[Mr Spiller]

Couple of things.

Use the RX-8 box as the first four ratios are the same as an FD box with fifth just a little higher.

Don’t use the 6 speed box, I broke 4 and 2 while mapping !

Grant you can use an FD box in an 8 or visa versa, by changing the bell housing and tail shaft cover, so every thing stays in the correct places.

For 350 brake, stay with 1680 secondary’s and the lilac coloured 550cc for primarys (you will also find good MPG when off boost)
You wont need any more injector for that and I only use 1680 / 850's for 520 brake   

p.s. have 5mm off each flange face and that would help but I still think the sump will sit too low. ( I flattend two sumps on track)

Clive
Good idea
You mean shave the bush on the engine mount ? I like that I’ll try it . Sump is currently same height as the Greddy on my 8 . so it’ll run another 10 mm lower , I could get some harder compound bushes made I guess .
I don’t suppose you kept any templates for the the intake manifolds you had Built . Judging by the photo you added it seems to work a treat ?


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[Mr Spiller]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

I agree
I’ve been through 2of the 6 speed boxes in my 8
3-4 gear starts grinding /  falling apart
I’ve used the 5 speed box and it was brilliant , real strong .
Only problem in the 8 , the jump between 3 and 4th was huge and it struggled to gain momentum in 4th


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[Grant Monkhouse]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

Just looked at ebay for how much GD gear boxes are up for sale, 500 quid.

5 speed rx8s are 100-150

6 speeds are 250

Think I need to look at running rx8 stuff and sell the fd gear box

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[Mr Spiller]

Another question
Is it shorter clutch slave  cylinder or oil filter housing  location ?


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[Grant Monkhouse]

Couple of things.

Use the RX-8 box as the first four ratios are the same as an FD box with fifth just a little higher.

Don’t use the 6 speed box, I broke 4 and 2 while mapping !

Grant you can use an FD box in an 8 or visa versa, by changing the bell housing and tail shaft cover, so every thing stays in the correct places.

For 350 brake, stay with 1680 secondary’s and the lilac coloured 550cc for primarys (you will also find good MPG when off boost)
You wont need any more injector for that and I only use 1680 / 850's for 520 brake   

p.s. have 5mm off each flange face and that would help but I still think the sump will sit too low. ( I flattend two sumps on track)

Clive
Good idea
You mean shave the bush on the engine mount ? I like that I’ll try it . Sump is currently same height as the Greddy on my 8 . so it’ll run another 10 mm lower , I could get some harder compound bushes made I guess .
I don’t suppose you kept any templates for the the intake manifolds you had Built . Judging by the photo you added it seems to work a treat ?


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I think Clive using a lower inlet manifold from racing beat? Then custom upper?

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[Mr Spiller]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

Just looked at ebay for how much GD gear boxes are up for sale, 500 quid.

5 speed rx8s are 100-150

6 speeds are 250

Think I need to look at running rx8 stuff and sell the fd gear box

Sent from my VOG-L09 using Tapatalk

5 speed you’ll pick up for £50.00 , easy if not cheaper
6 speed are £150.00 normally as they stick them in Mk 2 escort rally cars


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[Grant Monkhouse]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

Just looked at ebay for how much GD gear boxes are up for sale, 500 quid.

5 speed rx8s are 100-150

6 speeds are 250

Think I need to look at running rx8 stuff and sell the fd gear box

Sent from my VOG-L09 using Tapatalk

5 speed you’ll pick up for £50.00 , easy if not cheaper
6 speed are £150.00 normally as they stick them in Mk 2 escort rally cars


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£50? From lads that are breaking cars?

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[Mr Spiller]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

Just looked at ebay for how much GD gear boxes are up for sale, 500 quid.

5 speed rx8s are 100-150

6 speeds are 250

Think I need to look at running rx8 stuff and sell the fd gear box

Sent from my VOG-L09 using Tapatalk

5 speed you’ll pick up for £50.00 , easy if not cheaper
6 speed are £150.00 normally as they stick them in Mk 2 escort rally cars


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£50? From lads that are breaking cars?

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Yep
Let me know if you need one
Pete on RX8 OC struggles to sell them
He’s a good friend , they don’t break so no one buys them


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[Grant Monkhouse]

You use the stock RX-8 push type clutch with the RX-8 belhousing or  FD bellhousing if you want the pull type .

Also RX-8 boxes have a kinder life with less power going through them.

I worked out that you are forever  hearing about S1 and R3 boxes dieing but not 192 boxes.

Just looked at ebay for how much GD gear boxes are up for sale, 500 quid.

5 speed rx8s are 100-150

6 speeds are 250

Think I need to look at running rx8 stuff and sell the fd gear box

Sent from my VOG-L09 using Tapatalk

5 speed you’ll pick up for £50.00 , easy if not cheaper
6 speed are £150.00 normally as they stick them in Mk 2 escort rally cars


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£50? From lads that are breaking cars?

Sent from my VOG-L09 using Tapatalk

Yep
Let me know if you need one
Pete on RX8 OC struggles to sell them
He’s a good friend , they don’t break so no one buys them


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I think I got my subframe from him, comes from stroud?

As for the oil filter, if its tight for space I would get a relocation kit, as you don't want to be struggling to change filter, which we do often on these, even more so on a track car.

I remember changing the oil on my rx8 and it was a pain in the arse and that was a stock engine bay

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[re japi]

Yeah, 6 speeds are crap. Even tho its based on mazda box, its not, its built by Aisin. 5 speed is basically the same that FD has. However, 6 speed from R3 is built by Mazda and its quite strong, but they are rare.

Clive had a good point on those clutch types. I recommend that you choose RX-8 type. Reasons :
-its easier to modify
-you can buy 8's bellhousings cheap
-with that power, 6speed it is not an option
-with that power, you will destroy boxes, so its better to destroy cheap 5 speed boxes than FD boxes


Also, some one said, Im not sure tho, that 8's boxes PPF mounting area is stronger than FDs box

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