Search found 546 matches

by Duk
Thu Mar 28, 2024 3:09 pm
Forum: Race Cars and Track preparation
Topic: Adrian’s lightweight Giant Killer 2.0
Replies: 10
Views: 1647

Re: Adrian’s lightweight Giant Killer 2.0

820Kg's??? :shock:
That's INCREDIBLY light for a steel body car that isn't the size of a shoe.
Need some pics.

See the Alfaholics have made a carbon fibre body for the 105 GT Junior.
by Duk
Thu Mar 28, 2024 2:57 pm
Forum: Performance
Topic: V6 12v Individual Throttle Body
Replies: 15
Views: 10206

Re: V6 12v Individual Throttle Body

How's your 3D printing game, Z-man?
Design and print a decent plenum chamber in nylon. Just make sure there aren't any large flat surfaces.
It might look a bit like a dogs breakfast, but you don't look at the plenum when you're driving the car.
by Duk
Mon Mar 25, 2024 2:17 pm
Forum: Race Cars and Track preparation
Topic: "Patches" MD's Final Racing Project
Replies: 126
Views: 45959

Re: "Patches" MD's Final Racing Project

MD, I think there also needs to be emphasis on a pumped oil supply for the ring and pinion gears, rather than relying on conventional splash/carry lubrication.
Same thing for the main output shaft bearing that wears the thrust load from the pinion gear.
by Duk
Wed Mar 20, 2024 5:27 pm
Forum: Race Cars and Track preparation
Topic: "Patches" MD's Final Racing Project
Replies: 126
Views: 45959

Re: "Patches" MD's Final Racing Project

Structurally reinforcing the transaxle to keep clearances correct, does sound like 1 of the most important thing that can be done. Making the main bearing plate from a block of alloy steel like 4140, me thinks, would be a very good idea. Having a pumped oil supply with, at a minimum, a feed line for...
by Duk
Wed Jul 12, 2023 7:31 pm
Forum: Fuel, Electrical & ignition (stock Bosch)
Topic: Driveshaft driven Alternator
Replies: 4
Views: 2324

Re: Driveshaft driven Alternator

I've thought about it. And had similar ideas about putting the starter motor down there, too. But it doesn't look like there's enough space down there for it, without doing some pretty nasty modifications to the body/floor. It would be pretty cool if magnets could be embedded into the clutch flywhee...
by Duk
Mon Sep 14, 2020 6:09 pm
Forum: Introduce yourself - Gallery
Topic: Steve's 3.0 24v supercharged GTV
Replies: 38
Views: 30109

Re: Steve's 3.0 24v supercharged GTV

Zamani,

I reckon I found that picture on Mendes website for IMSA Alfa parts. It's been in the Alfa pics folder a long.
by Duk
Thu Aug 27, 2020 7:21 pm
Forum: Introduce yourself - Gallery
Topic: Steve's 3.0 24v supercharged GTV
Replies: 38
Views: 30109

Re: Steve's 3.0 24v supercharged GTV

Dropped spindles would certainly improve geometry and travel too ! I do have two sets of front spindles & hubs, but I've never felt brave enough to trust them being cut up and re-welded to give the necessary extended lower section. Perhaps instead of drop spindles, look at doing an upside down ...
by Duk
Mon Jul 06, 2020 3:51 pm
Forum: Suspension, Steering, Wheels, Tires
Topic: SZ/RZ rear suspension mounts
Replies: 6
Views: 4945

Re: SZ/RZ rear suspension mounts

A good picture.
by Duk
Mon Apr 20, 2020 5:14 pm
Forum: Engine
Topic: 24v swap missing info
Replies: 2
Views: 3653

Re: 24v swap missing info

With regards to inlet manifold design, I'd suggest that you look at very capable normally aspirated engines. Notably the Ferrari 458 and the 991 chassis Porsche 911 GT3. Both make about 125hp/litre and the Ferrari engine achieves a BMEP number of 15+. Importantly, neither of them use ITBs. If you co...
by Duk
Fri Sep 07, 2018 6:11 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 20602

Re: Which would you choose and why?

Does anyone know of a suitable liner material other than grade of cast iron that usually gets used?
If a stronger, stiffer steel type of material could work as a cylinder liner, then it might be more suitable for a high stress application even with a thin wall thickness.
by Duk
Wed Sep 05, 2018 7:10 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 20602

Re: Which would you choose and why?

How far could the capacity of the 2 litre motor be taken? With 2.2 or more litres of engine and a well sized (as small as you could get away with) turbo, you'd broaden the torque curve of the engine noticably. Really speeking, if you were able to add 10% more engine capacity, then you should be able...
by Duk
Tue Aug 28, 2018 4:55 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 20602

Re: Which would you choose and why?

Going by what Jim has said, you might aswell start with the Holden (GM) 3.6 litre engine. All aluminium with continuously variable valve timing for all 4 camshafts. Jammed into the now dead local Commodores, they move those barges OK. Modified for more power and in a much lighter car, they'd make de...
by Duk
Mon Aug 27, 2018 6:11 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 20602

Re: Which would you choose and why?

Got a friend with a 420hp turbo TS powered 75 street sedan. His words : "Mostly undrivable./unusable power". Without knowing a lot more about it, I'd guess he's got a pretty sizeable turbo on there. Probably of the GT30 variety? Fairly sizeable turbo on a fairly small capacity engine does...
by Duk
Sat Aug 25, 2018 3:39 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 20602

Re: Which would you choose and why?

I've asked similar questions in the past. Obviously a turbo'd 3 litre V6 will give the highest average torque, even if peak HP is kept the same as a 2 litre. If the car's weight is kept within reason, it would be effortlessly fast pretty much everywhere in the rev range. Effortlessly fast in a strai...