8v 2l Twin Charged -my Little Project

[PSk]

Quote:

Originally Posted by bcal My tailshaft has been shortened both ends, reversed, nuts and bolts mixed up and has never been balanced. Though I did have the welding done at professional driveline shop. I may be game but I'm not stupid.

[Duk]

A side by side comparison off an XR6 turbo rubber dognut and an Alfa Guibo has the Falcon 1 a fair bit bigger. May post a photo when I have more time .

[Biba69]

Those considering the Falcon donuts did take a look at the inner working of the Alfa donuts did you not? I would be surprised if there are three on the Falcon's driveshaft, but suspect just one as there is on the Alfa Spider's and GTV's. If I'm correct it would then have a completely 'hollow' interior. And again if so, I can guarantee they will never work on an Alfa transaxle car.

I will say that if someone starts with a 'pretty' clean sheet of paper, is a good (as in experienced, gone to college) engineer, it should be possible to come up with a different driveshaft design altogether for the transaxle cars which 'might' be able to use readilly available off-the-shelf donuts.

The two piece driveshaft is pretty hefty. Since there is both a flywheel on the engine, along with one built into the clutch assembly, I suspect the cars would benefit from a considrably lightened driveshaft - providing it is giving nothing away strength wise. Carbon fiber? Aluminum? However, you'll also notice these aren't just tubes on the Alfa's, but have tapers unlike most (if not all) front engine/front transmission cars.

Some years ago I exchanged emails with a fellow knowledgeable with the prop shafts for helicopters. The photos he sent me showed a sandwiched type of 'joint' in the shaft which would have some of the characteristics of a rubber donut though I doubt it would have the shock absorbing characteristics of one. I would surmise the more power an engine has, the more 'give', along with strength in the driveshaft assembly it would require to survive for long.

Biba

[ToonRboy]

Not to get back on topic, but twin charged has been used successfully in the past

YouTube - Victory By Design - Alfa Romeo 158 "Alfetta"

400+HP on just 1.5L - not much info on the block design tho... I imagine serious modifications would have to be made to your nord to contain these pressures.

[buzzed]

That was a pretty awsome clip! It's two superchargers though, not turbo and supercharger, even though the end result is similar...perhaps if they had used my proposed setup...they might not have needed as many pitstops...and might have beaten the merc's :-).

So what do people think this car should be called when it is done? My brother is a graphic artist for movies, so I'll get him to design the badge, I'll then have it made.

I note someone had a cool name idea on this thread: autodelta evo B4.

I thought perhaps: 116 tsc special (ie twin supercharged special)

Any other suggestions?

Pistons and rods have been ordered...6 weeks to delivery.

[5yearplan]

Alfetta GTSC 2.0

[Biba69]

AWESOME STEALTH CAR in 64 point type.

No?

Ya gotta have some fun with it.

Biba

[buzzed]

heh heh, Biba I'll think about that ;-)

whats Italian for twins?

Oh well, I am sure this is the least of my concerns right now!

No updates at this point, other than I got a 2 liter head to play around with on the weekend. Might use it to port out and just see how far it can be taken out....learn a bit.

[braddo]

I think the early 70s supercharged prototypes were referred to as GTA-SA (SA for sovralimentato), so maybe

GTV-SA or GTV-TSA

Or maybe just 'T Sovralimentato' (don't want to give it away with 'turbo'!)

What's sleeper in Italian?! Dormiro?

Fantastic project, by the way, and an interesting read even though a lot of the tecchy stuff if above my head!

Brad

[buzzed]

Nice I like the sound of that, you are right, I don't want to give it away at all, sleeper is certainly my intention with this project.

[ToonRboy]

Doubt it'll be a sleeper. I mean, with that SC whirring away, there'll be no mistake she's forcefed. You know, like the guys who get the aftermarket Blitz BOV that whooshes on every shift...kinda' hard to say "turbo, what turbo?"

Anyhow if, I mean, when you get it running, I'm sure a name will come to mind...

[braddo]

My guess is it would still be quiet(ish) at rest or when cruising up to lights. And even if people hear something and assume there's some forced induction and 200hp under the bonnet, that still makes it a sleeper!

I can just imagine the looks on Holden/Ford drivers' faces when Buzzed blows them into the weeds. It makes me giggle. I love sleepers!

Brad

[lenus]

A blitz BOV and a sc whirring away are completely different things.

Just because it has a sc whine doesn't mean it's -not- a sleeper. Fact is, the gtv is an unknown car and people who does know what they are, probably know they normally aren't capable of that much.

But when people go and stick all this noise and crap onto their skylines and stuff you kind of expect them to perform, and when they don't they look like idiots.

A BOV doesn't make a car fast, infact, I once read somewhere that an atomospheric BOV actually increases turbo lag, so what's the point of having all this noise?

I remember a while ago now, maybe 2 years, when I first got my 4-door sud with the 1.7 and twin 40's on it, that thing hammered. I used to just drive with the filters off, and at idle there would be a bit of a whistle that came from the engine bay.

This skyline rocks up next to me, it was bright orange, had the most ridiculous wing ever and was just littered in fast and the furious style stickers, it was pretty much the biggest rolling advertisement ever (read: wank).

I was sitting there, with a smile on my face at the red light (as you do when you drive an alfa... I mean c'mon, who isn't happy when they drive an alfa) and the passenger of this skyline says to me "oi, what are you smilin about, in your pos car, why don't you buy a real car" - typical aussie really?.

Anyway long story short, I took off, gave it a boot full and got a 1 car jump off the line - which they couldn't have been expecting but then when he realised he had a challenge he tried to bridge the gap - to no avail.

I took him at the next sets of lights as well - turns out it wasn't a turbo'd skyline.

So the point is - people don't listen for noises at idle, people look at the car.

This alfetta could have the biggest v8 in the world with the loudest supercharger in the world - if it doesn't stick out of the bonnet - its a sleeper.

Re: badging, how were the turbo delta fetta's badged back in the 80's?

I liked the GTSC 2.0 though.

If you are going to go for anything that is long, the name has to be in italian and really long in true alfa fashion.

[Greg Gordon]

It's possible to make the supercharger really quiet. Have you ever heard the supercharger on a Buick Park Ave. It's almost totally silent.

Greg

[Biba69]

Since a kid I've always had an American dictionary (though it was mistitled 'English' - meaning in our version a wing is a wing rather than a fender). So then I had to get a real English dictionary when I bought my Riley. Am I now going to have to get an Australian one - and please don't tell me that New Zeland has their own language/spelling also?

I figured out 'skyline'. Rather charming term. But what's a BOV in American?

Unnh, are the rear window aftermarket louvers for the Alfetta GT/GTV6 considered 'skyline'?

Biba