Wayne's boosted 8 project

[clive]

I meant 5mm off the lower inlet and 10mm on the upper flanges.

You will need to pull the engine to make a bulge in the bulkhead to get the oil filter in , never said this was going to be easy 

[Mr Spiller]

I meant 5mm off the lower inlet and 10mm on the upper flanges.

You will need to pull the engine to make a bulge in the bulkhead to get the oil filter in , never said this was going to be easy 

Ha ha
Honestly I thought that’s what you meant
However graham who was down last night for a cuppa was convinced you meant the engine mounts .
I’ll look into the filter , seems to clash with the slave too
Thanks Clive


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[Jamie R]

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

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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Morning Wayne,

Interesting point on the gap between 3rd n 4th.
I bought a 5 speeder for the rotus, and obviously if you’re running a huge turbo you probably won’t notice the gap so much with super torque delivery.

I’m hoping the lightness of the rotus will overcome that gap a bit. I was just wondering what diff you were running while you had the 5 speeder in? If you had an r3 diff or the earlier rx8 diff.

Again I bought an r3 one to close the gaps up a bit. But I’ve not ran anything yet do I don’t have anything to compare it to


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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

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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Morning Wayne,

Interesting point on the gap between 3rd n 4th.
I bought a 5 speeder for the rotus, and obviously if you’re running a huge turbo you probably won’t notice the gap so much with super torque delivery.

I’m hoping the lightness of the rotus will overcome that gap a bit. I was just wondering what diff you were running while you had the 5 speeder in? If you had an r3 diff or the earlier rx8 diff.

Again I bought an r3 one to close the gaps up a bit. But I’ve not ran anything yet do I don’t have anything to compare it to


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Jamie
You’ve made my day
This is something I do know a bit about
Standard 4.4 diff with 5 speed box will show around 112 mph on the dash speedo in 3 rd gear
I tried the R3 diff with the 5 speed and it’s down to around 95 mph
I’d stick with the 4.4
I done a comparison in Mallory park where Matt had  R3 diff and 17 inch wheels which then roughly equates to a 5.1 .
From the tight  hairpin I’d be first gear with the 4.4 diff
He was second gear . From there we would change gear near enough in same place but I was  always one gear lower
So bottom of straight he was 5th gear and I was 4th
Gerard’s bend he was 4th I was 3rd
I’d that makes any sense ?
What size wheels will you be running ?
And what weight will routs be ?


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[Jamie R]

I’m running 17” steels I can’t remember the tyre size off top of my head but wasn’t a million miles away from the stock rx8 circumference. Maybe just a taller sidewall.

I’m aiming for around 850kg. Slightly lighter than a stock lotus elan.


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[Mr Spiller]

I’m running 17” steels I can’t remember the tyre size off top of my head but wasn’t a million miles away from the stock rx8 circumference. Maybe just a taller sidewall.

I’m aiming for around 850kg. Slightly lighter than a stock lotus elan.


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I don’t think you’ll notice the drop from 3rd to 4th with that weight .
Could save some money and use standard diff and 6 speed box I suppose


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[Jamie R]

I’ve got both options

The 8 I’m driving round in will be a parts doner eventually

Got 2x 6 speeders and 1 x 5 speeder

Got 2 x 4.4 diffs and 1 x R3

The world is my oyster lol


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[Mr Spiller]

I’ve got both options

The 8 I’m driving round in will be a parts doner eventually

Got 2x 6 speeders and 1 x 5 speeder

Got 2 x 4.4 diffs and 1 x R3

The world is my oyster lol


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For road use I’d stick with 4.4 and 6 speed box


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[Jamie R]

Noted


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[Mr Spiller]

I always know the manifold needed to be adapted slighty
Maybe quite a lot or I’ll never get around a corner

So I do I bite the bullet and get turblown or similar  cast one or is a made up one just as effective
I can get this one adapter and welded very well


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[Grant Monkhouse]

You've noticed the steering rack is in the way of the turbo manifold? I also have this crap problem. Mine is hitting on the universal joint.

My solution is going to be to put a "dimple" into the rear housing pipe where the UJ hits. My pipe diameter is quite large so should be perfectly fine, what diameter is your piping as you don't want to choke it too much if the piping is small.

Solution 2, get a left hand drive chassis

The turblown ones are very expensive I don't know if they will even work on rhd still

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[Grant Monkhouse]

I have this issue which I'm guessing is same as yours?

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[Mr Spiller]

I have this issue which I'm guessing is same as yours?

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Mine much tighter than that , I’ll get a better photo later
If it’s the same UJ as the RX8 I shaves the corners off on my Greddy kit
Saved a good 10 mm and I was not that bothered it it did touch it slightly
That was on the inter cooler pipe tho


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[Mr Spiller]

It’s a bit tight
One bolts snapped so it’s off now re drill - tap and loosen up
It was a bit stiff too


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[Grant Monkhouse]

It’s a bit tight
One bolts snapped so it’s off now re drill - tap and loosen up
It was a bit stiff too


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I rekon you can modify that a little bit? Cut the straight piece out and use some 45s to negotiate around the UJ?

What diameter is that UJ, it looks slimmer than mine as mine was off the mx5 rack

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