Search found 536 matches

by Duk
Fri Sep 07, 2018 6:11 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 875

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: 875

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: 875

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: 875

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 tend to b...
by Duk
Sat Aug 25, 2018 3:39 pm
Forum: Performance
Topic: Which would you choose and why?
Replies: 30
Views: 875

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...
by Duk
Fri Jan 26, 2018 8:49 pm
Forum: Gearbox, Clutch and Driveshaft
Topic: transaxle upgrade's
Replies: 53
Views: 9092

Re: transaxle upgrade's

I was having a look through my Haynes manual for the Alfetta's and it shows needle bearing rather than bushes in those older gearboxes.
by Duk
Fri Dec 08, 2017 8:38 pm
Forum: Gearbox, Clutch and Driveshaft
Topic: transaxle upgrade's
Replies: 53
Views: 9092

Re: transaxle upgrade's

Excellent!
by Duk
Sun Nov 26, 2017 2:18 am
Forum: Other
Topic: Alfa SZ ES30 3,5L AHM UK @ Goodwood
Replies: 1
Views: 267

Re: Alfa SZ ES30 3,5L AHM UK @ Goodwood

Shweet!
But the video needed to be much longer! 8)
by Duk
Mon Nov 20, 2017 5:56 pm
Forum: Site Administration & announcements
Topic: 1-Year Notice of Forum Closure (End of 2018)
Replies: 25
Views: 1418

Re: 1-Year Notice of Forum Closure (End of 2018)

[quote="4SFED4"]Any consideration of monetizing the site to offset costs?[/quote] I for 1 am totally against this appoach to running a forum. There becomes a conflict of interests and that very rapidly intrudes into the freedom of speach we all enjoy here. I was once instructed to alter, (Alter, not...
by Duk
Mon Nov 13, 2017 6:25 pm
Forum: Site Administration & announcements
Topic: 1-Year Notice of Forum Closure (End of 2018)
Replies: 25
Views: 1418

Re: 1-Year Notice of Forum Closure (End of 2018)

Lets do everything we can to keep the forum alive and the excellent information that lives here available for many more years to come. I'm sure that most people are more than happy to make contributions to cover the cost of any move to a different platform. But I really believe that it needs to stay...
by Duk
Mon May 01, 2017 8:25 pm
Forum: Gearbox, Clutch and Driveshaft
Topic: driveshaft conversion
Replies: 378
Views: 58133

Re: driveshaft conversion

Something I've been thinking about for a while based on some of the things that have been posted on various forums by guys like MD, but also Richard Jemmison over on AlfaBB. MD says that 1 rubber coupling at the engine is a minimum. Richard says that 2 couplings are required if you use a solid centr...
by Duk
Sat Apr 22, 2017 8:28 pm
Forum: Performance
Topic: Inlet Manifold Design
Replies: 125
Views: 52517

Re: Inlet Manifold Design

The Ferrari F360 manifolds only have 2 different states not 3 like the Porsche system.
by Duk
Fri Apr 21, 2017 8:34 pm
Forum: Race Cars and Track preparation
Topic: The Orange Cab -MD's New Racer
Replies: 253
Views: 40403

Re: The Orange Cab -MD's New Racer

Looking the business there MD! 8)
Any more development work for the Cab planned? Maybe some more aero work like under trays and splitters?
Looks like the steering colum mounts could be made a bit more sturdy.
by Duk
Fri Apr 21, 2017 7:22 pm
Forum: Performance
Topic: Inlet Manifold Design
Replies: 125
Views: 52517

Re: Inlet Manifold Design

It seems like the Porsche Varioram is probably the most devoted variable harmonics inlet manifold. It uses 3 different stages of dual length and divided plenum chambers. Long runners/divided plenums, short runners/divided plenums and short runners joined plenums.
by Duk
Wed Apr 19, 2017 5:26 pm
Forum: Performance
Topic: Inlet Manifold Design
Replies: 125
Views: 52517

Re: Inlet Manifold Design

Dual length manifolds so seem more common on engines with fixed camshaft timing. But Toyota did use interlinked dual plenum chambers on some of its 6 cylinder engines, both straight 6 and V6 without any form of variable cam timing. And there was that Nissan engine I posted a pic at the very beginnin...