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Old 02-03-2017, 12:05   #2191
TimC
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Liking those drive flanges Donald. Great way to loose rotational and unsprung mass.

Are you on fabricated arms to match the subframe too?
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Old 02-03-2017, 12:24   #2192
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Liking those drive flanges Donald. Great way to loose rotational and unsprung mass.

Are you on fabricated arms to match the subframe too?
Every little helps!

The wishbones are made bespoke for the subframe as the roll centre has been corrected and it has adjustable anti-dive. The wishbones weigh 1.7kg each with the bearings
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Old 03-03-2017, 14:00   #2193
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Any plans for carbon discs to save a little more weight? Plenty of road going stuff running them now. Not going to be cheap though!
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Old 03-03-2017, 14:56   #2194
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Any plans for carbon discs to save a little more weight? Plenty of road going stuff running them now. Not going to be cheap though!
Rubbish from cold. They need a serious amount of heat. Donald needs instant bite for the hills.
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Old 03-03-2017, 15:50   #2195
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Yes i kind of need good brakes for the first corner after launch and we dont get a chance to put any heat into the brakes before launching. The XP8 and DBA disc combo is brilliant even when everything is cold, but the disc thickness is way OTT for hillclimbing.

I have thought about using non vented discs as i rarely get the brakes hot on a hillclimb, but some sprints would need the vents. Spaceframe tiddles will use smaller discs and calipers as she will be around 650kg and won't need anything too big or heavy
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 04-04-2017, 16:04   #2196
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The wiring loom is nearing completion and should be back with me in a week or two. I decided to go with paddleshift since the ECU and wiring now supports it. This was going to be something for the future but I decided I may as well do it now while i'm changing so much on the car.

The system uses a compressor and accumulator for the air pressure for the moment but in the future I will have a refillable 200Bar bottle in the car without the compressor. I should get 3 or 4 runs from one bottle fill and have a diving air bottle here for the air jacks I can use to fill the on-board bottle. For the moment the compressor system will be ok (but heavier than I would like it to be )

I've done away with the gearlever and linkage and mounted the gear actuator on the gearbox. The bracket was very tricky to make as it's so far above the nearest bolts to hold it. I ended up with 2 carbon brackets and an aluminium strap to make it as rigid as it needs to be. The bottle inside the car is on a carbon bracket, again bespoke, and very strong. I'm not keen on that coming loose inside the car should I have a shunt

There's still much to be done and it looks like the car won't be ready until nearer the middle of May. Until the loom arrives I can't finish fixing the hoses to the car securely and everything will need a good clean and polish as it's put together.
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 04-04-2017, 16:12   #2197
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Stuff "Tiddles"

How is your SD1
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Old 04-04-2017, 16:20   #2198
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Nice work Donald
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Old 04-04-2017, 16:24   #2199
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Stuff "Tiddles"

How is your SD1
I sold it last week as I had an offer i really couldn't refuse

Have bought another Twin Plenum to use and not worry about getting dirty. I took a year out from Tiddles to do the restore so now it's Tiddles time. The SD1 will be a road toy until I restore it to concours
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 04-04-2017, 17:57   #2200
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How come you didn't go for an electromechanical system?
They can be programmed to change gear smoother than the air systems as they produce maximum force instantly, then back off as the stroke moves.
http://www.xap.fr/en/xap-products/ac...rbox-actuators
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Old 05-04-2017, 12:46   #2201
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How come you didn't go for an electromechanical system?
They can be programmed to change gear smoother than the air systems as they produce maximum force instantly, then back off as the stroke moves.
http://www.xap.fr/en/xap-products/ac...rbox-actuators
I'm not too keen on the electric solenoids TBH. Perhaps things have changed but the electric actuator systems i've seen have needed large/heavy units to provide the force needed, and all have had issues around that area. I'm also being careful with current draw on the batteries, hence why I'll move from the compressor to a total loss HP bottle and regulator in future.
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 05-04-2017, 13:14   #2202
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Donald

Do you have any photos of your front subframe and control arms: would love to see masterpieces.
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Old 05-04-2017, 13:17   #2203
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Donald

Do you have any photos of your front subframe and control arms: would love to see masterpieces.
No, sorry. Last time I let photos of the rear subframe out someone copied it and started selling them. I have too much invested in the front subframe and wishbones to allow that to happen again! Photos will be shown when I have 10 units ready to post out
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 07-04-2017, 04:14   #2204
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Thank you Donald

I am happy to agree with your assessment.
Although tempted to ask for replica ��
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