Thanks for the input, I had considered that, the typical pistons for these motors at the moment have the ring at .300" below the crown which is good for an all around engine, but seems a bit much for a drag only setup. Detonation is a concern only to a point, The engines are tuned for very...
I work exclusively on mitsubishi 4 and 6 cylinder turbo engines and I have a few questions concerning combustion chamber and piston design. The stock combustion chamber on the engine is a pent roof design and the typical piston design used to date in these motors has been a round dish design...
Well I made the restrictor finally, took all the information given and came up with a decent result. It is going on the car today and racing next weekend. Thanks for everyones input!
I am building an engine currently for one of my customers who drives in the open rally class, The engine is a 4g63 Mitsu with a big 16G turbo. The class allows any engine mods to the stock block etc, as long as the compressor inlet on the turbo is reduced to 34MM. Since I have to make a new...
Thats good to know for the rest of the cranks we do. It is common for them to be like that from other venders, if it is better to use a radius, I need to look into that. Any suggestions as to how large a radius in comparison to the leading edge? Would it be optimum to match them or go a little...
The engine I am working with is a DOHC Mitsubishi 6g72 originally from a 3000GT twin turbo. It has a very strong shortblock from the factory with 4 bolt mains and a heavy forged crank. Destroked with custom Ti rods, it will end up having a rod ratio of 2.14:1 and be 1.2:1 oversquare. The center...
Thanks Pat and Phil, That sounds like a better option. I have plenty of dead rods to modify for that purpose. That definately sounds like the best way to go.
Thanks for the info, that is an idea I hadn't considered. I will try it out, sounds like it should work well. I was going to try using a surface grinder if I could find a decent method to clamp it, but this sounds like it should work fine.
Thanks again
We are building a destroked V6 by offset grinding the crank journals and having custom rods made. The new diameter of the journal is the same as another engine we work with often however the width of the rod is .200" less. If we wanted to use the bearings from that application, is there a good...
We are having custom rods and pistons made for a full out drag engine and are also planning to have the crank knife edged. We do this on a regular basis with the 4 cylinders we build however this engine is a V6 and requires a bit more work. The questions I have are.Is there a good way to...
Thanks TVP, that is very helpful. Probably the last question I have on this is the use of a floating Titanium pin, they are coated as well, I am guessing the correct way to do this would be with a bronze bushing or maybe some better material. I have read on here about using silicon bronze and...
Thanks, that is a good thing to watch for I may not have considered. Any thoughts on a coating combined with the polishing, or is that a bad idea. I am still also curious if anyone can say what coating would be optimum.
