Whats all this '@' stuff....  Twit!

I dont actually know other than there will be thread rolled types or cut, either would
be fine for something like this, as its not holding the wheels on!

Thread rolled would be stronger and have the advantage of being a nicer surface finish
and more suited to the ageing process, stripping wise. Mass production prefers thread
rolling sometimes, either by design or simply due to the speed and waste issues making them.

I will have a look at work if you like as we use a lot of these in various lengths.

Would need the length of threaded areas each end and overall length ?

I put longer studs on mine for some reason Burtons comes to mind but could be wrong

Just down the road from me is my mate Adam who runs A-Jays VW Services, and he said that if I could check the tappets whilst it was cold and get it down to him, then he would show me how to set the carbs up. At the moment, I am running solid lifters in there, but it was a very quick and easy job to check and adjust them. After a few turns of the starter, the engine burst into life with a few pops and bangs and after a minute or two to warm up, I gently trundled down the road scaring just about every old lady I went past with a loud BANG! and into Adams workshop. I was quite amazed how well it drove considering the carbs had literally been bolted on with nothing touched.





The linkages were disconnected and then each of the mixture screws was adjusted to an equal setting of one and a half turns, the throttle stop screws were backed off completely and the engine started up. Adam had a simple airflow meter that sat in the top of the venturi and showed how much air was going through. By adjusting the mixture screws and the throttle stop screws, it was not long before all four venturis were giving the same reading. The linkage needed a bit of fettling, as one side was a little long, but by the time it was reconnected, the engine really sounded sweet and smooth. The timing was checked, and the Vacuum confirmed as working correctly, which was a bit of a surprise as nobody thought it would.

An hour and a half later, I was driving what felt like a very different car back home. I had not bolted the air filters back on yet, so needed to get it home to complete the assembly before I take it for a very eager spin.

I guess you have your studs now, I have some but thought I would show something we
do that not all seem to.

The small pip of a diameter on one end is useful as it bottoms out when screwed fully home,
which helps a lot to stop the threads binding when tightened down...

Its a mod that can be done quite easily to studs that don't have this feature...

Thats clever - not seen that one done before 

No, I have not got my studs yet, only just measured them

In an ideal world, I would have 4 of these:

M8 stud with 10mm threaded to go into the head, 65mm of shank, and 15mm of threaded the other end for the nuts and washers - 90mm overall

Yes, its something that I haven't seen anywhere else and
is certainly worth having, its busy, but I will try to make four during the week

Peter

Yes, its something that I haven't seen anywhere else and
is certainly worth having, its busy, but I will try to make four during the week

Peter

You are an absolute star   

Thank you   

Filter tops bolted on, and I have also connected the crankcase breathers as well. I`m not keen on the breather system going into the top of the filter like this, because I don`t want the crankcase fumes to be fired straight into the venturi, but there is precious little space anywhere else to attach these. I have made sure that the breathers are pointing at the space between the venturi and not directly at them. I have also connected a breather to each side, just to make sure everything is kept even.





I took the car for a little blast, and it did highlight a bit of a problem with my linkage. My linkage is exceptionally smooth with no play whatsoever, but that does mean that it didn`t actually return as quickly as I would have hoped. The Alfa Romeo throttle return springs are not quite man enough for the linkage as I have it, so you can see that I have also added a third return spring to the Hex Bar itself, which has made all the difference.

I have often wondered about the way many kits have crank case breathers that route
back into the filter.

On my Beetle the crankcase breathes into a separator area just beneath the oil filler cap.

Any oil mist reforms on the walls and drains down a tube to the rear and towards the ground where it exits,
there is another tube that goes upwards to the air filter box, upwards being the key word, no oil ever
gets there though as it drains down the other exit tube.

Isnt there not another slightly better way to do this on twin carb setups, it all looks a bit iffy thats all and not very well thought out.

Would some nice mods to the generator pedestal be something that could be looked at?

Maybe 

I have often wondered about the way many kits have crank case breathers that route
back into the filter.

Crankcase breathers usually go to the filters as parts of the emissions - granted not something we are that fussed about, but its something to do with burning the unwanted gasses rather than venting to the atmosphere

Would some nice mods to the generator pedestal be something that could be looked at?

Not on a T25 lump - No   

Working round the back of the car has reminded me of another little annoyance I have going on. My oil dipstick is not a great fit, and does not seem to want to stay in place. After a good belt down the road, I often find it sticking out a bit. Not far, probably less than 10mm or so, but enough for me to want to push it back in every time. Found a great cure using an old brake shoe spring.





A bit of heatshrink on there just as a visual reminder, else when I check the oil I am going to be equally frustrated that the dipstick is now stuck in the hole.

Hi Dave, glad your up and running again I never had any trouble with the dip stick staying fully in with that engine but it does blow out with my new engine when I give it plenty of rev's I have put a little spring on mine also

Rob

Dave, I can't remember where I got them from, but I bought some springs that hook under each end of the hex linkage and give a massive boost to the return on the arms.

Have a look around and I'll check my old copies of ultra vw - I think they may have been covered in there.

That would be much appreciated - it could still do with a bit more 

I'm having trouble the details here.


The spring I use is in the 4th post on here
http://www.thesamba.com/vw/forum/viewtopic.php?p=7851984

But I cannot find a link to one for sale.