My new 1.5 tuned engine.

Greek · Jul 7, 2010

Some historic Data

Well , as you know , i was looking for a way to increase the performance on my white QV 1.5 Sprint preferably by installing 1.7 8v ideally with mech tappets. After quite some time and with lots of luck i was able to locate and have (for free) one such an engine and as an added bonus with reprofiled cams. Unfortunately , cylinders were to worn and would need complete overhaul so , due to financial reasons , the project was canceled once more. At least i have kept the heads with reprofiled cams & mech tappets along with the dished pistons and maybe in the future pair it with a 16v block .

At the same time in my misfortune i got real lucky because i was given (for free again) a race spec/prepared 1.5 engine that was stored in a warehouse for quite sometime. The engine has Alquatti dual lobe cams with bigger valves, ported intakes and other stuff.

So we got the engine to my friends in the workshop and we are in the process of reviving it after all this years. So i am going to have lots of pictures during the process for everyone to see.

Greek · Jul 7, 2010

Ralfa116 · Jul 8, 2010

Great present

Thanks for sharing your finding!
Wish I would get such an engine too. I always wanted to improve my Alfasud 1.5ti, but the only thing I managed to do until today is some work on the heads and 40''s Dellortos.
Go ahead and share your experiences with us.

Greetings
Ralf

lesthegringo · Jul 16, 2010

Interesting to see the pictures, however I have some questions over the preparation.

The valves don't actually look bigger than the largest 8v valves fitted to the later 1.7 engine, and they also look very much like they are recessed into the head. When on full lift, this looks like it will result in shrouding of the valve; I am assuming they have kept the valve seat very narrow, if you intend to use this as a road car remember that narrow valve seats will not last a huge milage.

I'd be interested in seeing the shape of the valves, to see if they are standard or not.

The other thing I noticed is that the con rods are completeley unmodified, which is unusual for a race engine. Normally the excess material would be removed to lighten them, and also the beams would be dressed to remove the rough surface, even if they are not polished. This would be for reliability.

Can you post pictures of the inlet ports, valves, flywheel and the crank for me to see? I'd like to know what they have done

Les

Greek · Jul 19, 2010

Ok, i went to the workshop last evening and i didn't had good news once more. It seems that after the polishing on the cylinder , some water damage was reveled on one of them so we cannot use the block unless we machine it and use bigger pistons. This is not an options snce the pistons were also machined to handle the aggressive cams.

Some photos so that we can see the differenc between good and damaged cylinder.

This is the perfect one after the polishing..
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010318.jpg
Closer one..
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010316.jpg

And the damaged one...
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010317.jpg
Closer one...
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010315.jpg

So we are now in the process of finding a good block , either a 1.5 or a 1.7 since i have both heads. Good thing is that i am not in a hurry to finish it as my current engine runs well.

We also took apart the heads with the alquatti to refresh it a bit and be ready for the new block.
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010319.jpg
http://i84.photobucket.com/albums/k25/xGreekx/New engine/14072010320.jpg
(Hope this is what you wanted Les or i can take more if they havent packed it).

As for your comments Les , about the engine mods.

This engine was not prepared by a pro like AHM Motosport but a mechanic so i am guessing the mods were not so extreme. I think , he had this engine in his normal everyday car , he just was racing in Alfa Trofeo events once in a while. He also commented that he wanted to drive it as easily as a normal car and he has managed it as the idle was very steady and the power output similar to normal up to 4000 rpms. But i will take your remarks under serious consideration.

My new 1.5 tuned engine.

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