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Discussion Starter · #1 ·
anyone know a good alfa mechanic in adelaide??? looking for a rebuild of a 1.5 twin carb, i have some new parts (gasket set, bearings, etc)including some 1.7 pistons that i'm thinking of using, but no time to do it myself :( . any help would be greatly appreciated as i have been sitting on this for two years and all i want to do is drive the thing, after i've fitted a nice exhaust of course.
 

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Discussion Starter · #2 ·
well i've pulled the heads off, as well as anything else that got in the way, found something very interesting, the heads are quite chocked with carbon deposits but the the cylinder bores are perfect, and when i say perfect i mean they still have the honing marks on them. So what now?? fit new rings and hope for the best or get a precautionary hone on the bores, just in case. btw the reason for the rebuild was a case of extreme accidental over revving (off the clock) when throttle jammed wide open mid gear change, it straight away had a ticking noise that would only appear when engine was warm to hot. i suspected a cracked ring as a bent valve should tick when cold as well. oh well out with the pistons and see what we find.
 

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Discussion Starter · #4 ·
yup i phoned your recommended mechanic and he was full of good ideas as what to do and not do, i also phoned a mechanic that i knew from when i was in the alfa club. He had some similar ideas and some diff, anyway the heads i'm sending away to be rebuilt and get the ports polished and match ported to the inlet manifold, i am also toying with the idea of some warm cams, the guy that i know has some in his workshop but they are of the twin lobe style, i wonder if i could use them with the 40mm valves from the later engine, late model heads with early model cam boxes, are the valves the same length???
 

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Discussion Starter · #6 ·
in fact he has two pairs of cams, both twin lobe, i know that one set is a copy that he had made up by wade cams, i think he said they were to autodelta specs but i may be wrong. i found on the net a while ago that piper and tornado cams do cams for the sud/sprint/33 but i dont know anything about them as far as performance, maybe someone from the u.k. can comment on them????
 

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Discussion Starter · #11 ·
i did consider a 1.7 for a while, i looked all over oz and could not find a 1.7 twin carb. so i bought the last set of 1.7 pistons from the spare place with the idea of boring the 1.5 out to create a 1.6. i had been told that this worked a treat and was very revvy. however i have now come to the conclusion that i want something reliable and easy to get parts for, so i am going to stick with the 1.5 and warm it up a bit.
the sump is off and one piston is out, i was surprised to find a crossed drilled crank, i was led to beleive that it was only the early suds that had these?????
 

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Discussion Starter · #14 ·
update, heads have been ported and two new valves fitted (the ticking noise was two very slightly bent valves), all valves were lapped in. As for cams, well the cost compared to performance compared to how much i am prob going to dive when finished equals no cams, we were quoted around the $700 mark. On the plus side picked up a set of ansa extractors. The block is stripped and awaiting to be sonic tested and bored to fit 1.7 pistons.
 

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Discussion Starter · #15 ·
further updates, the block has been sonic tested then rebored so that the wall thickness is as close to even as possible (1.7 pistons going in) also had it decked to up the compression ratio, unfortunately the locating dowles got damaged on removal so have to find new ones or make new ones. Just have to finish lightning and polishing the rods then it will be time to put back together. Just looking into what to do about the oil sump, do i baffle existing, enlarge existing or run tubes from heads to sump, or all three, decisions decisions, any other ideas anyone????
 

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Discussion Starter · #19 ·
engine completed and in, once i got the leads in the right order (doh got 2 and 4 crossed) she fired up no worries. Its done about 70km so far and no issues which is a relief, so its about time to start thinking exhausts
 

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Discussion Starter · #21 ·
yup engine in car and running but extractors not fitted as yet, they still need to be cleaned up and sprayed in flame proof paint. As for the benefit, i was told approx 5 hp. They wont go on till i get the exhaust done and then i will get an overall comparison, standard headers and exhaust against aftermaket headers and exhaust. i am going to slightly modify the headers by getting them cut at the y point and getting a larger section welded on to match up with the 2 1/4 system planned
 

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Discussion Starter · #24 ·
cheers for the support, yup s works in background. Been playing with the electrics and i am astounded as to how this stuff ever works, there appears to be 3 relays to control the headlights/foglights, and whilst i have it all working not sure if foglights are right. When they are switched on the mains bar the parkers go off, this happens for low and high beam. In the owners manual it suggests that when the foglights are on it will switch off high beam if they are on but leave the normal headlights on. Anyone got any insight as to the correct operation??
 
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