Sam's build thread

[sambb]

Simon K I think the problem now is that there's only 1 or 2 good threads at the bottom and a tap wont fix the ones above them. They werent threaded, they were pulled. I just paid 300 odd bucks to get that core re bearing'd and rebalaced too. An utter waste of $ and effort. I have another CHRA spare that I could put in its place , its more that now I'm not keen on going to all that effort all over again to put a 110,000km core in thats been oversped/tuned its whole life. Just kicking a can at the moment really but ill get over it. I could spend another 3-400 bucks on refurbing that too but at this stage that'll feel like dead money. Thats why if I'm going to double do it, I want something that I'll be happy with for the longterm but not too big to kill my cast conrod >100k km engine which is also why I'd not looked at a GT2860 but yeah I do suppose that from an efficiency/temperature point of view there's an advantage.
Its hard to go past a K0# turbo for bolt in convenience - its just which one? F21, K04, K03/K04. Short on dollars (al this years tyre money will have to go into this) which is why a K04 with the tune to go with it (+FPR) is a cheap easy way in and then later I can add the fuel pump, injectors 3in MAF, pre turbo WI injection and have scope for improvement. Anyone got a straight borg-warner K04 tune that doesn't cost APR money?

[simon k]

Simon K I think the problem now is that there's only 1 or 2 good threads at the bottom and a tap wont fix the ones above them. They werent threaded, they were pulled. I just paid 300 odd bucks to get that core re bearing'd and rebalaced too. An utter waste of $ and effort.

I see.... I guess you're not asking for solutions, but helicoil? tap it to the next thread size up?

though I don't even know where the 'water inlet tower banjo' bolt is, or what the metal is...

[Sydneykid]

I see.... I guess you're not asking for solutions, but helicoil?

I'm with Simon, I'd heli-coil it, but only if it is beyond liquid thread repair. Keeping in mind that water jacket bangos don't carry a lot of pressure, just a typical cooling systems 20 psi or so. As a result "a couple of threads" may well be enough. But just in case I'd look at something like Loctite Form-A-Thread, I've used it with great success a number of times. If I remember rightly it's now called Loctite PC3967.



Cheers
Gary