My understanding from what I have read is that they used the same brakes as a normal 2000cc GTV but with different pad material specced. It was a pretty simple turbo conversion and is simple enough to replicate, the most expensive and difficult bit being the exhaust manifold.

 

Just to let you know why i might be asking this question, i'm trying to find the biggest set of brakes that were fitted to an Alfetta 2l within standard production. Racing limitation say technically i can't run V6 discs and calipers cos, to my knowledge they were never installed onto a 2l Alfetta. PLEASE someone prove me wrong on that point and i'll be happy!!

 

This answers your question? The Group 4 GTV 2L Turbodelta had Singlecaliper AP Lockhead brakes. I am not sure of the size of the discs. Possibly they were the same as on the GTV6, although the GTV6 used twin calipers on each wheel.

 

Australian 'Turbodelta" conversions ran a"holden commodore type sliding caliper with a lockheed ' formular 3' -vented disc

 

Hi!

The AP Lockeeed CP2270/71 is one of the historic brake calipers in AP/Lockeed range.

Here are the specifications sheet in AP website:
CP2270 - 144S4QR

My friend Luis' 75 1.8 Turbo Evoluzione (a car built by JollyClub) has a similar setup, but uses the CP2361 caliper, ( CP2361 - 96S4QR ) and looks nice. The drivers who drove the car when it was a period racer said it outbraked most of the rivals...





Best regards

 

how so much power difference between the two cars

 

Greetings: While they both seem to have the same hardware, the boost on the Rally version is twice that of the Stradale. 1.8 vs 0.9 bar.

- Michael

 

The hp numbers were more than I thought for both the stradale and the rally version. 175hp is more than the 75 turbo had in stock form isn't it?

370hp is very impressive for the time in a rally car, but if the 0-60 was only 5.8s it can't have been very useable power

 

Engine internals were *not* the same. There was a lot of work done to make the rally cars hang together with that amount of boost. Cooper-ringed liners set into the head....

 

THe HP figure for the Rally Turbodelta shown above are a bit optimistic! The Group 4 Turbodelta only achieved 310-315 HP!

 

The truth is out there somewhere, GTV6 SA! Have here the official press release from alfa Romeo for the 1980 competition Turbo Delta. The above copy was from a present article about the Turbodelta. Here the owner claimed 370 hp. Well, he could say whatever. Your 310-315 Hp. could be right.

 

..... Have here the official press release from alfa Romeo for the 1980 competition Turbo Delta.......

Hi Gabor
do you have more official documents about the Turbodelta? I'm very interested in all information's about the normal street Turbodeltas. I own a very original 1979 Alfetta Turbodelta. She was one of the very first cars, which was converted by Autodelta...

Andy

 

the HP is not the figure that raised my eyebrow but the 420 ft/lbs or torque?

i had a set of turbodelta GR4 campy's and they where 15inch. i think the early NA GR2 cars came with 13 inchers

 

Does anybody know the body measuremets of the Gruppo 4 Alfetta Turbodelta, specialy the wide front and rear??

 

Andy,

I'm not sure where I found this, and you may have seen it already but:

 

Hi K76

Thanks! Interesting Diagramm!

Andy

 

Andyro: The turbodelta street car was not much more than a turbo engine installation in a regular Alfetta GTV 2000. A small number were produced so that the group 4 car got homologated for racing. I think also you could get the turbo parts for installation in turbo less cars.

A guy here in my country bought a complete new Giulietta Turbodelta engine(175hp) and installed it in an Alfetta GTV. Was a nice car. The engine is still around but the body is gone.

Here a Turbodelta page from your home country:

http://www.alfetta-gtv.ch/dat/serienmodelle/5.html

 

Andy,

Do you know if the Turbodelta received any chassis upgrades such as bigger torsion bars, sway bars etc?

 

According to my info they just took cars with different colours straight from the production and inserted the 2L turbo 150hp engine. The hood was matte black and with vents. The rest of the car was original 2L, also commented in a test. However harder springs and dampers could be ordered as aftermarket.

quote from the above link:

Auf Wunsch waren härtere Dämpfer und Federn zu bekommen.

 

I can't speak for the rest of the world but a prominent car racer/dealer here in Australia (John French) fitted the Autodelta kit to a bunch of cars here in Brisbane. As far as I know only very small numbers were fitted elsewhere in AustraIia (I saw one advertised years ago and I own a/the sedan fitted with the kit). I don't know exact numbers for the John French Turbodelta - I suspect it is single digits - I owned #2, I know where #1 is (I saw a #8 or so - can't remember exactly - was a long time ago). Anyway - the Autodelta content of the kit was limited to the exhaust manifold, turbo, wastegate, inlet plenum, cross pipe, brake rotors and hats. In this country the brake calipers fitted were Girlock as used on local General Motors Commodore (not very exotic, but effective - sliding caliper, big single piston - huge pads). I'm not 100% sure but I believe all the John French cars were fitted with Bilstein shocks - but no other suspension mods. They also had 15 x 7 Simmons 3 piece alloys fitted (also obviously an Australian local thing). My understanding (happy to be corrected!) is that this was pretty typical - the Autodelta kit was the engine mods - and bigger brakes only - though the latter seems to have been "localised" so far as calipers go. Beyond that what was fitted seems to have been up to the dealer/customer.

 

Thanks for interesting info, Darryl. Seems that in your country you had the Turbodelta only as kits.

In my opinion the kit should additionally have low compression pistons of CR 7:1 instead of the standard 9:1. Also the carburettors were different as they had pressurized float chambers, so either a rebuild kit or complete new carburettors.
About the Girling brakes I really can´t say anything. Could be they ordered it from Autodelta or bought it locally. Usually when Autodelta upgraded the brakes for racing they used 4 pot AP calipers.

 

Hi - forgot to mention the boost kit on the carbs. You are probably right about the pistons- though perhaps not as low as 7:1? I can't remember exactly what was in my original car. To fill in the other details I do remember: there was an electric fuel pump and a Malpassi regulator to keep the fuel pressure a few lb above the pressure in the plenum. The dizzy was locked. The cars with the kit fitted "stock" (as I know it) had less than impressive off-boost power and not a great top-end. The torque curve looks about right - engine felt really strong in midrange but not elsewhere...

Oh - and the brakes are Girlock - not Girling - though I think the companies may be related? Girlock seems to be the US rather than British/European co? Anyway the brakes were those used here on relatively larger/heavier 6 and 8 cylinder cars. I suspect it was a local decision to use something easily and economically available - not just the calipers but replacement pads. Despite the crude design they actually work pretty well on such a (relatively) light car.

 

Interesting thread this, Darryl seen your post on the local alfa forum with the guy who has your engine in his 79 GTV.

The link below is one for sale in South Australia its another kit I presume on an 83model, claims to be one owner asking $ 12000 ono

Used Cars for Sale | ALFA ROMEO GTV www.drive.com.au

 

The link below is one for sale in South Australia its another kit I presume on an 83model, claims to be one owner asking $ 12000 ono

Used Cars for Sale | ALFA ROMEO GTV www.drive.com.au

The owner (quoted below) should do some research:

Only 3 of these cars were sold in Australia and my car is now likely to be the sole remaining Alfa GTV autodelta turbo in the world.

Still - the fact his car exists is interesting news to me at least. Thanks for posting...

 

Hi!

A bit off topic....

Does anybody know the code of the colour the works Gp. 4 Turbodeltas were painted?
It's a dark red but I'm no shure...

Regards, Alvaro.

 

Any one has scanned the Homologation papers for the 1980 Gr 2 or GR 4 GTV Turbodelta or a link to get this info ?
Thanks
S. Rokkos

 

Hi Guys i'm from canberra and would like to buy a alfetta sedan turbodelta is anyone selling?i would be restoring so the condition doesn't have to be perfect.thanks regards joseph 0413195836

 

na way you will get a factory turbodelta in australia

 

Define factory. If you mean "none built in the Autodelta factory, by talking cars delivered from Alfa and fitting the Autodelta bits", then I agree (well - I think you are probably right - but you never know what someone may have imported over the years).

If you mean none built with the exact same bits, supplied by Autodelta, but assembled here as a dealer (or Alfa distributor) fitted option on new cars, then you are wrong.... I am aware of at least (all Alfetta GTVs):

My old John French Turbodelta (#2)

2 Other John French Turbodeltas (#1 and another I don't recall the number of but I have a vague idea it was #6)

Another turbodelta GTV - not John French - that was for (reluctant) sale recently - exchanged a few emails with the owner - car sounds like it may even have the cooper-ringed head that was used on the full rally cars - not always fitted to the "kit cars".

A John French Turbodelta that has been on one of the car sales web sites for a long time (that said, I can't be sure it isn;t the one I don't remember the number of)

So far as sedan versions go - I have a fair bit of doco on mine (it used to be owned by Peter Dowling) and it was always referred to as "the" rather than "a" Autodelta sedan. As far as I know there were no others fitted with the Autodelta bits from "new". Over the years its had a few bits replaced with non original parts, so I'm certainly not going to claim/pretend it is "factory" now - it might have been once.

As I've been at some pains to point out to you, the turbodelta setup from "factory" for the homologation specials wasn't fantastic out of the box - so a lot of surviving cars will have been modified by now.

And no, the sedan isn't for sale.