[Terry Syd]

Interesting. I have taken a few runs with the M2 on my 2.4 TD and it also works quite well.

I would be very interested in seeing a dyno run with the DO1 installed pre-turbo and the DO2 post-tubo.

If it was possible, I'd also like to see a run with a DO1 pre-turbo and a DO1 post-turbo. In other words, having the same flow rate as your present system.

I'm using my intuition here (and a bit of previous experience), but I think the DO1 pre and post turbo may give better power at the lower RPMs one normally uses around the streets. I also think the DO1 pre-tubo will open up your wastegate at the higher revs and you will pick up some power on top end.

[Dust]

How hard was it to find the MPV in manual? I did a search here on Japan used car sites and I don't see a single one.

[rmpmla]

TS,
we have almost same engine size. have you tried using the DO3? coz' my kit comes with DO3 and thinking of testing it but i'm afraid of over-injection.

i would also like to try and dyno a pre(DO1) / post (DO2) turbo set up.

will keep you updated once stock of DO1 arrives to the dealer here in Manila.

[rmpmla]

Originally Posted by Dust

How hard was it to find the MPV in manual? I did a search here on Japan used car sites and I don't see a single one.

Not so hard to find it here because the 96~98 model MPV was sold here with only manual transmission. whereas those Japan domestic MPV are with 2.5 li TDI with automatic tansmission. while US released are with V6 gasoline with automatic transmission. i guess its more of marketing strategy

[Terry Syd]

Take a look in the diesel section of the forum and you will see a thread I started on the Toyota 2.4 TD.

Yes, I have run a M3, however the nozzle insert was wrongly machined and I substituted the insert from a much larger nozzle. I am sure that it wasn't atomising properly, so my previous testing wasn't that accurate.

I have tried the M1 pre-turbo and an M2 post-turbo and the combination works well on my machine (check the thread). Perhaps I could get better low-end with and M1/M1 combination, I don't know, that's why I was wondering if you would give it a try.

The Toyota diesel runs hot, so I will stay with the bigger M2 post turbo. I may put on the motor controller to be able to tweak down the pump a bit. That way when I get up on the highway and the engine is running 3100rpm, I can tweak the controller up to the higher flow rates, also when the engine temperatures start to rise I can have a bit more flow available.

[rmpmla]

TS,
very informative thread you got there. i'ill push thru with the pre-turbo M1 and post turbo M2 once parts needed are sorted out.

i think this is also the best set up for me. a finer mist of M1 at the pre-turbo may help reduce wear on the turbo impeller plus aid the post-turbo M2 for the cooling effect.

BTW, the water suction at the pre-turbo nozzzle is also my worry as i understand that there is vacuum on the pre-turbo track. would a check valve be effective in stoppping the suction of water? coz' opening of check valve will be of the same flow both for suction on pre-turbo and pump pressure. i was thinking of putting a solenoid valve instead, what dou you think?

[Terry Syd]

I'm going for a dual check valve system. There will be a check valve, then a 'Y' connector. After the 'Y' connector the lines will run towards each nozzle. The nozzle holder for the pre-turbo M1 will have a second check valve attached to it. This is to stop any dripping through the pre-turbo nozzle.

I've already tried it without the check valve on the pre-turbo nozzle and the system works fine, however I am concerned with long term erosion of the compressor wheel, so the extra check valve on the pre-turbo nozzle is my own addition to the system to address what I see as a potential problem.

The check valve on the nozzle apparently works to keep syphoning happening on a NA engine, so it will probably stop any syphoning on our systems.

[rmpmla]

Okay, now i know. will probably do the same once the pre/post nozzles are in place.

thanks for the detailed explanation

[Dust]

Might be something for DOA to offer in a kit where pre-turbo is recommended.

[rmpmla]

Originally Posted by Dust

Might be something for DOA to offer in a kit where pre-turbo is recommended.

that would be most welcome. anyway, the usual kit comes with 3 nozzles so its just a matter of adding 3 more parts ( 90 degree fitting, check valve, and y-connector).