Alfetta GT and GTV

[buzzed]

Hi all,

Don't think I have gotten around to putting up pics of my two Alfetta's before so here goes.

My Alfetta GT was bought about 1yr ago stock. I plan to keep it pretty stock...well at least I plan for it to be able to be returned to stock if need be!

Alfetta GT 1976 (photo shortly after putting wheels on)
Completed tasks:
Simmons 17*6.5 and 17*8.5 (rear gaurds were lipped by prev owner), new sumitomo tyres, 215 on rear, 205 front.
new vented disks front
solid new disks rear
overhauled calipers rear. (were sticking)
New clutch slave and master.
New brake master.
new engine mounts
koni yellows all round
new high voltage globes (can now see in the dark!)
Momo steering wheel (not in this photo)

Coming tasks:
Just purchased a twin spark lsd
Building a twin charged motor for it, lets just say it will be a 2l 8v motor with turbo, supercharger, intercooled and fuel injection...and its more than a pipedream, the engines on the stand and the parts are all in the shed slowly being assmebled...when I get time inbetween the race car! Target hp-200rwhp. Its low, but its the torque that will be impressive.


Alfetta GTV club car (building to fit into group S)
Full PACE motor - baffled sump, 48mm intake valves, 40mm exhst valves, race cams, 48mm webbers (new), ecurved dizzy etc etc. HP=150 at wheels on base tune
welded in cage (does not tie through to struts as this is not allowed in grp s)
lowered seat (I'm six foot six)
removed sound deadner (weight saving=13kg)
Pace extracotrs now fitted, white extractors will get tucked away for a rainy day.
konis
unknown rear springs (stiff)
uprated torsion bars
front mount oil cooler completed this weekend just gone.
And many many other things I have forgotten.

Basically the red GTV has taken me 1 year from when I bought it (and when I got it it was drivable to the point where I belted it around winton raceeway all day). I guess you could say one thing led to another and I just got a little carried away. But I am down to the little things now, like mounting gauges, making heat sheilds etc. I plan to take it to the sprints at the end of the month all going well.

[Echo Leader]

Wow, fantastic cars!

Some noteable items in those descriptions, too. 17x8.5 in the rear!! That's some serious wheel. They look really really nice. 215s must barely cover the metal, are you planning on some meatier rubber once the twincharger (!!!) motor is up and running?

And speaking of the twincharger....where are you in the design process? You've already bought parts so I'm guessing you have figured out how to integrate the two? This is an amazing project, I'd love to hear all about it!

[buzzed]

Haha, glad you like them.

Firstly on the wheel size - They actually had 245's on them to start with which came off my Fiat 124BC...and would you beleive they actually fitted (with ever so slight scrubbing when pushed hard...due to the rear end walking around a bit). The 245's were just too big for the alfa, actually I have a pic of the red car with the 245's stuffed under the guard (it is lowered) and the whole guard lip rests on the tyre :-). I went to 215 to get the correct profile and actually as you can see the tyre is not too bad a fit, I knew it would be a stretch, but I have plans to lower the car about 20mm in the rear, so I did not want much bigger.

Actually for putting power to the ground, wider tyre is not necessarily a better thing as the contact patch does not really increase that much as you would think, it just tends to change shape (ie get longer cross car and narrower for aft...with an end result of not much more tyre in contact with the ground). With the power levels I anticipate, ie modest, I don't expect to many issues with getting it down, once the lsd is installed. Actually I had a s3 RX7 (the first shape) with 500hp at the flywheel...that had issues with traction ;-), but then when I inslaled the lsd on that, it was amazing just how much poer could be put to the ground and that was on the same tyre. Of course wheel spin could be induced should you wish...


So my twin charger project is mainly driven by wish to try something more complex than a straight turbo conversion, been there done that, and want to learn something new. The thinking is that I will iliminate percievable lag whilst avoiding having to spin the supercharger hard up top in order to make good hp. Fuel consumption will be less than if I were to just use the supercharger alone. I will be running the elrtric clutch on the charger to switch it off at about 4000rpm (this point needs to be tuned once the system is running). The intent is to have some boost over lap between the two systems whilst avoiding a bump or dip in the torque curve.

I'm using a toyota sc14 (1.4 liters of air per rotation). I've been doing a bit of research on the VW 1.4 liter twin charge motor to try and work out their switching strategy. I have a few ideas of my own.

Since I have modest power aspirations at the moment I will run a t3 style garret turbo.

I am running fuel injection curtisy of a camira here in aus which is a Holden (other GM products out there probably also run a similar setup). The benefit of this set up is that the whole unit cost about 100 dollars inclduing loom, manifold, computer injectors, fuel rails throttle body etc etc. And on top of that its tunable! You do however need to adapt a crank angle setup to the computer and for that I use a lada nica crank angle sensor setup. All this has been done before on this forum by a freind of mine in Adelaide, so he has kindly walked me through the process. It is a bit of mucking around with finding bits as would you beleive lada niva stuff is actually getting expensive?!! The manifold has to have the flange modified, but the ports line up in the right places which is very handy. I have actually thought about lining up a sr20 nissan manifold to the alfa head and seeing how close they are as they have heaps of after market stuff available that gives you lots of options (eg greddy, nismo etc).

Oh almost forgot, I plan to use rx7 s4/5 injectors, they flow 550cc and plug stright into the camira manifold....and they are 30bucks each second hand.

So I'm off today to cut and shut this flange so I'd better get a move along.

Feel free to fire questions or even better give me suggestions / help!

I'll add acouple of pics to the first post to show more of the GT and the rather laughable fit of the 245 under the red GTV

[gtv27]

can you post some more shots of the gt - it looks awesome with those wheels on it.

I'm using delco on my GTV6 and its a good thing, provided you can get somebody who knows Kalmaker to tune it properly.

That induction setup sounds very ambitous and will be quite something if you manage to pull it off. Wouldn't a vortech work for that also? Maybe you could find some aircraft cabin pressuring pumps and hydralicly power them (oh, no, that's been done before GTaSA )

[buzzed]

Yep I know someone who tunes factory computers so not an issue.

What picks do you want of the GT? I dont have so many pics of it actually.

[gtv27]

A low front 3/4 shot would show the wheels off nicely. Is a bit rare to see big wheels on early model cars, but I think your combo looks great.

[buzzed]

I'll snap one off when I get a chance.

I like big wheels on old cars...when done tastefully. I also can appreciate the period look as well with fat rubber and smaller diameter rims.

The rear could actually fit a 9.5inch rim under the gaurd with carefull offset measurement. It would all have to go inboard...but would look very mean I reckon....will do this once turbo/supercharger are hooked up.

[GeeTV]

Umm.. OK, now i want an Alfetta GT!!

[smestas]

very nice looking cars you have. What kind of headers are those on the red GTV?

[buzzed]

They are custom headers, no brand stuff. I now have pace headers and so the white ones are on the shelf gathering dust :-). Still one day I might popo them back on something as they look great and perform well.

[buzzed]

Actually I'll make a point of putting up a few pics of the gear I am accumulating for the turbo/supercharger conversion. I'm getting more and more confident I can make it work. Just bought a set of low comp pistons so now with a static comp ratio of 7.5:1 I will be able to get a little more serious with the boost. Next step is to review options for block stiffening...while trying to avoid the 5k mono block option...!

[79GTV]

Love the Alfetta GT!

Wheels look great! Always loved the car in silver with the chrome!

I'm looking at getting some simmons wheels for my 1979 GTV. Just wondering how the wheels fit. Any issues at the front when turning to full lock etc?

Cheers,

Dave.

[buzzed]

Hi glad you like the wheels. Simmons can give you what ever offset you want, so there is no problem with getting the wheels to fit.

On mine, the car has sagged a smidge on the driver side front (will fix it soon). This means that there is a point when applying full lock, that one wheel ever so slightly grazes the guard on the front right, it is prob sitting 20mm lower on driver side. Other side is fine.

A 17inch rim is not ideal for handling, I mean its good and traction is better than standard...way better, but with in my opinion, 15 or 16 inch rims would give you better handling and more compliance in the tyre....depends what you intention is. I have a set of simmons in 15inch which are 8 inch wide! Fit like a dream on the car, and one day I'll get around to painting them dark siler so set of the car...at the moment they are gold centers. Anyway I digress.

Be prepared to pay for the privledge though, these wheels are around the 650-700 each, depending on sizes etc. I got them with tyres second hand for 2500...they were in exceptional condition though...still, a lot of money for a little Alfetta. :-)

[Garth&Kel]

wicked alfetta very nice

[gtv27]

I'm with you on wheel sizing. I have 17's on my gtv6 and the tyre sizing is a pain the butt 205/45 is the only size I can find with the right load rating (88)

16's would have been better in hindsight as there would have been a wider variety of tyres available and the real-world handling would have benefited from a bit more rubber on the road and a bit more compliance in the sidewall.