Hi, thought an update should be in order.
Well, first of all, the half cut I put a deposit on didnt "clear" in Japan, so I was offered another and that didnt clear so I have waited until now and still nothing. So, I am cancelling the order and will try and locate a local FTE. This is all very dissapointing because the VNT was something I wanted to play with. Oh well!
All is not lost however; I have designed and built a programmable controller for VNT turbos. My cousins race truck is the recipient of this 58lbs per hour turbo (which will be maxed out at 18:1 AF ratio) and true to my cousins std quality of work, the setup is just amazing. You guys would not believe how good it is but the photos do show it. I will not post any until I am approved to do so.
Anyway, after a mishap where we completed destroyed a turbo on the dyno before even doing a power run due to oil feed issue, hopefully we will have another turbo ready today for dyno on friday. Fingers crossed we will have massive power (in Australian diesel terms) with very little smoke. I hope to video the final power run after the VNT computer has been programmed.
12HT news:
Since I am pushed for time and had decided to go for a 1HDFTE myself, I told a very good friend about a bore and stroker option that I had guarded for the 12HT that I had worked out when taking all the measurements when I was building mine. The idea is to have a huge VNT hanging off the side and feeding 140cc of fuel @ 3600rpm and peak torque of over 900nm available from 1750rpm. Well, since the turbo controller is finished (but not truely tested...) and since he thought my idea was a good one (they arent always and the engine isnt built yet...) he with my help has gone ahead with it. The block is bored, the stroker crank has arrived, the block has been welded up a bit and clearanced, the head is ported with (much) bigger valves, custom head gasket etc and......about 4.8 litres!! Standard cam to be used to maximize swirl.
Should be a first eh?
I mentioned it to someone else and they said that "a guy" had put in 3B pistons into a 2H with sleaves. I find this improbable since 3B pistons are 102mm, 2H are 91 and there is 16mm between the cylinders on a stock engine. Sleeves or not, 5mm is way too little between the cylinders, especially a diesel with cast iron.
However, perhaps he meant 2B pistons. A very uncommon engine....but 97mm (2B std) pistons would work with sleeves. Anyway, thats not what I used in the bored and stroker 12HT, but could be an option for someone.
So, a few things to write about in the next month or 2.
Not the least is how well the vnt controller works out, especially in an off road racing envirnoment where the engine is punished for hours on/off the throttle.
Next project after this is complete is to remove the governer from a 12HT injector pump and install a servo rack position controller....and an energengy air cut..... I have also wondered if a variable cam phase controller (of a gasser engine) could be retrofitted to the front of the injector pump to vary timing with load and revs etc.
Cheers!
