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The awesome thing about the 14 bolts is how easy they are to set up. Pretty sure whatever you got in the front won't be nearly so easy.

Hows that new gearing working? I have a full float 14 bolt with 3.73's in it. It has an ARB locker. not sure I could put in a 3.42. At least without replacing the locker.

Got my block back today, and my new crank should be here Monday. Pretty stoked. Think I'll file off all the sharp edges I find anywhere on the block. Should keep me busy on Sunday. :)

I get what you are saying. My point was that in the head the thicker mass of the precup is heat sinked and will only get so hot while the thin area around the nozzle will get red hot. This temperature differential is where the problem occurs. The new stuff must be really tough or designed...

Would you say the boom was caused by preignition of the fuel not going through the pumps but rather carried on the air? Or just flat out too much cylinder pressure? If I was doing anything that radical I'd be retarding the timing. The faster the flame rate the more retarded it would be. Honestly...

Not sure why you are telling me this. I figure just about everyone knows this. The exception is the glow plug on cold start. We may have to agree to disagree on that since I believe it works two fold. It heats the air but the compression still does most of that work. It glows red hot and the...

Pfft. You know you can't trust a shop. ;) If you want to know what is in there you have to put it there yourself. This is the same reason I build all my own engines. So far I have had a LOT better success than my dad has and he is the one that taught me engine repair at the age of 9 and 10...

I claim zero knowledge of nitropropane. It sounds like it might be bypassing the injection pump. If that is the case you were really gambling. How did you control the timing? What compression ratio were you using? Sounds interesting to be sure.

That is a little cryptic. I had thought of titanium pistons a long time ago right after I thought of steel pistons. Cost of titanium would always be an issue. blowing a hole in one should never be an issue.

Titanium pistons? why they last only 5 minutes. That stuff should be pretty tough.

Ahh I love a good test. Anyone care to wager what will happen? Anyone got spare precups for the experiment? Anyone got any idea as to measurements to test the results? I'll be building an engine stand and putting a 4L80E on behind but I will have no way to actually load it down. Be good for...

Just for giggles has anyone actually seen a broken precup? I presume those cracks could get so bad they would eventually go all the way through.

The only precups I have seen that were not cracked were the older smaller ported precups. The T-cups I am reusing for this build are already cracked. Not too badly. I'd prefer the newer diamond cups but no idea where to find them. Why would you insulate the precup from the head? You need to do...

Any part directly exposed to fire will get coated. The idea being to keep the heat on the fire side and allow the precup to be cooler.

Hmm I am not sure I follow completely. It is long well known that heat energy lost to the head and the piston and cylinder wall is lost efficiency. Every IC engine is a giant heat pump. If that heat gets cooled off you lose power and efficiency. The interesting thing about the precups is two...

I agree. I suspect that is one reason why I have never really had starting problems with my 18:1 pistons. Just goes to show if you built it right there is very little drawback to using those pistons in an IDI engine. This engine I am building now will also have 3 coatings on each piston. The...

I'm scratching my head here big time because while I have rebuilt many engines over the years I do not consider myself the "expert" that I would expect diesel depot to be. That being said I do know that bearings are held in by the crush factor, which is very much built on size. In short mixing...

Where is that drool emoticon when you need one. hehehe You should have said it was Bill. He is just northeast of me here in WA. Little much for an afternoon drive but not terrible. One different bearing did that? Must have been before he started using coatings on everything. I am thinking of...

I have a 350 ml nozzle in the manifold right between 2 runners so feeding 2 cylinders. 4 altogether and it seems to be a bit much. 250 psi pump feeding them. I'd like a 120 ml nozzle but I can't find any.

Whoa that sounds like a whole lotta fun though. Curious question though. Did you guys clean up the castings and enlarge the oil return areas? Did you use a high psi film strength oil in a lighter weight for the run? hehehe I got a engine block that would be perfect for you guys. lol it has zero...