Alfetta GT Turbo - Alfa Romeo Forum
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(Post Link) post #1 of 20 Old 4 Weeks Ago Thread Starter
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Alfetta GT Turbo

Please someone talk me out of this idea. I've found an Alfa 75 turbo engine, its a 1.8, just like the 1.8 in my Alfetta, but has fuel injection and an extra 30% power. I have a notion to make a modern turbodelta. I realise this is total madness, but I just can't help myself. I must be sick in the head, I know it will likely break the transaxle, the radiator won't take the heat, and the turbo wil no doubt burn the new paint off the bonnet and boil the brake fluid, but I want it WANT IT.
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(Post Link) post #2 of 20 Old 4 Weeks Ago
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I'm in the do it side of the argument, I've always wondered what my gtv would be like with a bit more welly, you know you want to.
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(Post Link) post #3 of 20 Old 4 Weeks Ago
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Do it, do it!
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(Post Link) post #4 of 20 Old 4 Weeks Ago
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So are you talking 156 bhp, could you not put a transaxle from a gtv6 in along with the radiator?
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No one ever regretted forced induction - thatís a fact.

You can always put it back to standard when the fire is out.
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(Post Link) post #6 of 20 Old 4 Weeks Ago Thread Starter
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I can feel a purchase coming on. Better do it before october 31, as after that no doubt there will be duty+vat+hassle+delay.
I am now thinking that the oil pan can have an oil return adaptor plate bolted on the side, I don't really need the turbo casting one. Plus it will be a nice ornament for the two years or so it will take me to get a 'roundtuit' .:0
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Other than the clutch, the transaxle was fundamentally the same, so that will be fine. I donít think the V6 rad was any bigger. So that will be fine. Add an oil cooler if youíre worried. You will probably cook the front brakes if you use it hard - they are absolutely tiny when compared to modern cars.

Do it. And make it a 2 litre while youíre in there.... :-)
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May I contribute a counter argument. Restore the Alfetta GT to original condition then go look for a 4C. Once you experience one youíll never look back and you wonít destroy a perfectly good GT into the bargain.
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Originally Posted by 147Alfaguy View Post
May I contribute a counter argument. Restore the Alfetta GT to original condition then go look for a 4C. Once you experience one youíll never look back and you wonít destroy a perfectly good GT into the bargain.
Interesting choice, I'm not sure a 4c will be in my budget for a long time though. I've spent a while getting the car back to near original condition, but I really miss fuel injection, and then this turbo engine came up, and well, it is the same block...
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(Post Link) post #10 of 20 Old 4 Weeks Ago Thread Starter
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Oh, I've stumbled across a twinspark engine for sale in Italy, I'm thinking this might be easier, and cheaper all round. But how do I make sure I don;t get ripped-off ? I can imagine by money goes into a foreign bank account and then .. zip. nothing. Any ideas? Can PayPal help ? is there an agent I can use?
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Originally Posted by alfahaze View Post
Oh, I've stumbled across a twinspark engine for sale in Italy, I'm thinking this might be easier, and cheaper all round. But how do I make sure I don;t get ripped-off ? I can imagine by money goes into a foreign bank account and then .. zip. nothing. Any ideas? Can PayPal help ? is there an agent I can use?
Road trip to Italy - still nice and warm there for a good few weeks...
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(Post Link) post #12 of 20 Old 4 Weeks Ago Thread Starter
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So I'm just about to try to transfer some money for the 1.8 Turbo, when I get an email with someone offering me a 2.0 Twinspark ,, argghhh. Just out of curiosity, I wonder if I can use my exisiting 1975 1.8 block and transfer the internals of the 1985 1.8T - since the capacity and engine number are the same, there is no need to do any DVLA paperwork...
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(Post Link) post #13 of 20 Old 3 Weeks Ago
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I bought a TS engine from Greece and paid Paypal without issue. Paypal have successfully come into bat for me with a few disputes with commercial vendors but I dont know how it would go against a private account holder. anyway, better than no fallback.

TS is great in a 105 as a sort of wannabe GTA but in an Alfetta, a turbo sounds more exciting while still of historical relevance. It will be a more complicated/expensive conversion however and think about insurance - nobody is going to dyno your car after an accident to check the exact power of a modified engine, but a turbo is pretty hard to miss.....
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(Post Link) post #14 of 20 Old 3 Weeks Ago Thread Starter
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I've decided to go TS after all. Mainly due to lack of time, as I believe it will be easier and quicker to fit a TS that comes complete with wiring loom, compared to having to make my own loom, which might be fun, but will take forever . I've driven many miles behind a TS getting a solid 31mpg, they have incredible low end torque. I even replaced the head gasket on one with 160k on it, where the liners had no sign of wear. Contact me if you need/want a Turbo as I know a guy in Germany who has two of them, and I need to make amends since I backed out the deal at the last minute, I'd like to find him a new buyer.
-Hazel
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I think you have made the correct decision!

The turbo will require quite a bit of bespoke fettling (ie £££) to set it up and get it running properly and even then, you will have the problem of heat.

I think a decent spec twinspark gives you better bang for your buck.

Out of interest, how much was the 75 turbo engine going for and what did it include/exclude - inlet, exhaust manifolds, wiring harness, etc?
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Alfahaze, the 1.8 engine was the best of the lot...1.3, 1.6, 2.0 and with the original cams, not those supplied to england! It was also a very balanced package with the brakes, suspension and transmission and had low unsprung weight and balanced weight distribution. The original GT was also the rarest and coolest with many features the later cars did not have so if it is a good car then i would say keep what you have.

The 1.8 engine can be tuned to 140hp easily retaining the 40 Carburettors with some head work and with 45s can go to 170hp+ with many tuners in england and europe specialising in it since it was an evolution of the 105 series engine and even have injection if required.

YEah the twinspark engine from the 75 is a good engine, but the engine in the 75 1.8 was a more rev happy and passionate engine, quite different from the alfetta 1,8 in head design and cams used.
The 75 twinspark had ventilated front brakes, a beefier propshaft and gearbox and an lsd combined to balance the whole package so why not get one of those already with everything you need there.

the alfetta turbodelta had lots of issues and became better with the 75 turbo and evoluzione but modern turbo cars are much better in performance.
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What issues did the alfetta GTV turbodelta have?

Given it was Alfa's first production petrol turbo, I presume heat related - am interested as I have one and not experienced any issues but then again, car is not driven much
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Originally Posted by arcbc88 View Post
...The original GT was also the rarest and coolest with many features the later cars did not have so if it is a good car then i would say keep what you have...
It is rare-ish, not sure if it is the coolest or most desirable, I'd say these versions are the gtv8, autodelta, SA3.0, calloway, or the Chapparal. Personally I would prefer a 1982 gtv6 with magnesium wheels and air con, as that is the spec of my first car, so has a special place in my heart. The alfetta GT is cool though, and I don't need to go fast these days, but I'd swap it in a heart beat for an 82 gtv6.
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What issues did the alfetta GTV turbodelta have?

Given it was Alfa's first production petrol turbo, I presume heat related - am interested as I have one and not experienced any issues but then again, car is not driven much
Hello Arguti maybe you have the red one bought in France few years ago. The GTV turbodelta used a KKK turbo which is not the best at spooling up or in terms of reliability. It also lacks an intercooler, the manifold is very crude and heavy, and the fuel supply is performed by a pair of Dellortos that is not as precise as injection and not easy to alter or setup.

Materazzi who developed the turbo engines of Lancia and Ferrari, notably for the 288 GTO and F40, made use of the then under contract the KKK turbo for the 208 Turbo of 1982 but switched to the Japanses IHI turbos for the 288 in 1983 with twin Behr intercoolers before it came out in 1984 after comparing both in design and build quality. The IHI's spooled up much faster and were produced with attention and fine tolerances. He then switched to a single IHI turbo and Behr intercooler for the GTB turbo of 1985/6 to superior effect. All these cars had injection and the 288 had bespoke digital electronic injection to better meter fuel.

The other aspect of the GTV turbodelta is that whilst this turbo was put in place no other alteration was made to braking or transmission or suspension (with option of stiffer rear springs and stiffer spica dampers). The increased torque at low revs puts added strain on the transmission couplings and gearbox and also the brakes but it was up to the owner to try to strengthen or improve them. This is Alfas way in not developing products.

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Originally Posted by alfahaze View Post
It is rare-ish, not sure if it is the coolest or most desirable, I'd say these versions are the gtv8, autodelta, SA3.0, calloway, or the Chapparal. Personally I would prefer a 1982 gtv6 with magnesium wheels and air con, as that is the spec of my first car, so has a special place in my heart. The alfetta GT is cool though, and I don't need to go fast these days, but I'd swap it in a heart beat for an 82 gtv6.
The Alfetta GTV6 production number is 22,500. The Alfetta GT 1.8/1800 was 21,948 and many of these were not properly cared for unlike the GTV6 so far fewer exist today. THe initial GT 1.8 had a different front grille and had a body coloured fuel flap covering the fuel cap unlike all other GT/GTVs which had an exposed plastic fuel cap. The interior of the intial GT was also differently trimmed with a wooden steering wheel. Mechanically the initial 1.8 had more sporting non emission 10548 cams designed for that engine (but not available in export markets or after 1976) as standard and also had the option of the 20% ZF limited slip differential in 1974/5 which was not again available on a production Alfetta GTV/GTV6 again. The Alfa 75 twinspark and 3.0 were the next production cars to intorduce them.
All the Alfetta GTVs are underrated and great roads cars. However the initial 1.8 had the best 4 cylinder engine and had 50/50 weight distribution with low unsprung weight and rak and pinion steering unlike the 105 it replaced.
THe GTV6 is a great sounding car and had a reliable engine, great for touring freeways at high speed across continents. However as a sports car its engine weight made it much more nose heavy and a successful period racer in England mentioned substantial adjustments had to be made to lower the engine to make it remotely competitive on track. It also had to my eyes less attractive plastic fenders/bumpers and less appealing rear light design compared to the original with inferior paint quality also.
The CAlloway Alfetta twin turbos were made in very small numbers in the USA and were not Alfa approved.
Alfa ROmeo did not have the money to develop the Alfetta GTV and as one ex Alfa Romeo engineer pointed out in an interview his team lamented the fact it was not replace with a car on a new platform since they were all derivations of the same alfetta chassis developed in the late 60s and launched in 1972. Still a great car and head and shoulders above its period peers in my opinion,
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Hello Arguti maybe you have the red one bought in France few years ago. Interesting stuff.....
Thank you, you are correct, I bought the red one in Paris, February 2014 along with the 75 Turbo Evoluzione - the 75 Evo has had to have the turbo replaced and exhaust manifold welded as I could not source a replacement manifold at the time - I now have 3 of them spare - 2 Evo and one plain 75 turbo one just in case!

Have you ever driven the South African GTV6 3.0?

To me, out of all of my Alfas, this is the pinnacle of the Alfetta series although not a perfect car by any means.
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