The 2H/12H-T/1HZ/1HD-T/1HD-FT Gturbo Alternative Tech Thread

[diby 2000]

Has any one seen or heard about these?

MMP Turbos

I have spoken to Luke and I think I may purchase soon.
Are there any specific questions I should ask first?

 

[gerg]

Id be asking for references from previous owners who can describe its performance or better yet a video or dyno so you get a clear idea of its "improvement". Not everyone's idea of improvement is desirable. Also, ball bearing turbos are in the vast majority of cases unrebuildable. Id clarify that and the cost of rebuild and if there are special oil requirements.

 

[diby 2000]

Cool thanks @gerg
I will ask for a dyno print and possible reference.
I was told it makes 14psi @1650rpm, not sure at what AFR that is, I will ask. As far as I can see that is an improvement over my stock CT26. Reaches >25psi by 1900rpm and can hold >35psi to redline I'm told.
Made 238AWHp and 545nm of torque @ 25psi on a 1HD-T.

As for the ball bearings and rebuild he makes the bearing cartridge in house but I will ask about rebuild price.
He did say no special oil required. Oil restrictor is incorporated. If engine oil pressure is above 45psi on a warm idle, then extra restriction is needed.

Any other questions I'm keen to learn.

 

[gerg]

Those are some impressive figures. See if you can get what compressor he's using or at least its dimensions as it almost seems too good to be true with response and rev range like that. AFR is a good question as a dirty tune can cheat a lot of performance out of a turbo. Get your engines oil pressure numbers at hot idle and operating rpm and double check its not going to short the turbo oil with his restrictor as our older motors tend to run lower pressure than many other vehicles. Depending on your numbers he might modify the restrictor to ensure adequate flow through the core. Ball bearing turbos are a lot less tolerant of too much flow, but no turbo is tolerant of too little flow. Your in AUS so mountains aren't much of a problem for surge, but do ask if hes plotted the compressor for higher altitude such as guys here in Colorado or New Zealand who run 5000ft+ and are much more at risk for surge than say yourself.

 

[diby 2000]

It does seem to good to be true.
I have spoken to people running big (TD05 20g) turbos telling me 35psi by 2400rpm. But their spool AFRs are in the 15-16 range. Not what I'm looking for.
He has told me the compressor is an 11+0 blade with extended tips. 53.5mm inducer and 70.5mm exducer. 0.6AR with antisurge slots.
Turbine is Nickel Inconel, 58.5 Inducer and 55.5 exducer. No AR given but its using a CT26 based housing for bolt up.

 

[Dougal]

Has any one seen or heard about these?

MMP Turbos

I have spoken to Luke and I think I may purchase soon.
Are there any specific questions I should ask first?

Never heard of them but the pic shows they've got the right turbine design. Unsure of sizing and that sizing dictates the flow limits.

20G and 18G compressors are too big for normal use.

 

[diby 2000]

The other fact I remember Luke saying was that the bearing and shaft will safely and happily spin to 165000rpm holding thrust loads of >45psi in other turbos. I found this speed quite impressive also.

20G and 18G compressors are too big for normal use.

Please don't get me confused. I think he said this turbo is GT30 (or GT28 i can't remember) based.
The others I have spoken to are running other TD05 based turbos.

You say 18G compressors are too big for regular use?
I have no experience, but I'm led to believe that would be a reasonable size for a direct injected 1H motor. Relegating the 16G for indirect injected. Can you please elaborate on that a bit more?

 

[Dougal]

You say 18G compressors are too big for regular use?
I have no experience, but I'm led to believe that would be a reasonable size for a direct injected 1H motor. Relegating the 16G for indirect injected. Can you please elaborate on that a bit more?

Because surge. Direct injection or indirect has no bearing on surge.

There are two different 16G compressor wheels.

 

[gerg]

At those pressure rations the 16g large wouldn't even come close to 3000rpms ? haven't mapped it recently, but that is a ton of boost for that kind of flow.

 

[thermionix]

18G ok on 1hd-fte?

 

[ForealBoreal]

The only difference between a big 16G (16G6) and an 18G is a larger inducer on the 18.

 

[diby 2000]

Because surge. Direct injection or indirect has no bearing on surge.

Understood.
How close to surge will an 18G get on a 1H?
I assume low low rpm. Like 1400 - 1600?

I assumed the direct vs indirect was the fuel ability to promote spool rate.

 

[ForealBoreal]

Well it depends on the pressure you are planning on running the turbo. No point in running a 18g at 15lbs when the 16G will be more efficient.

Again you can't just chuck one turbo on because it's "better"
It depends on your goals and performance you are after.

 

[Mcreight911]

Well it depends on the pressure you are planning on running the turbo. No point in running a 18g at 15lbs when the 16G will be more efficient.

Again you can't just chuck one turbo on because it's "better"
It depends on your goals and performance you are after.

Well said
And if your pump is standard or not .
A custom td05 18g with corectly setup pump is quite drivable for a daily even with a clean tune . Do you prefer a snappy responsive setup from low revs or can you live with a bit slower boost building and a silky smoth power delivery .

 

[Wildnlost]

Here are a couple vids of my Mamba hybrid CT26/td05-18g with 9 blade exhaust wheel and GTX 11 blade compressor. Stock air filter housing. Tmic. Very cold -22C. Elevation 1785 ft. Truck is a little stiff because of the cold weather. In 2WD. 32" tires. 4.10 gears. Seems to pull pretty good no surge. Flat foot off the line.

Driveabiity is alot like the stock turbo other than the extra boost. Passing another vehicle on the hiway is much easier. Having rebuilt the top end with a little porting seems to have helped the off boost performance as well. Runs strong only a puff of smoke when stomping it from idle I haven't touched pump since it was rebuilt. The oil at this temp affects spool a bit for sure. The air density is excellent though. Only ran in the cold weather so far. Might be different in summer..

Another vid of cruise at 100kph and then slowly depress the go pedal.

 

[diby 2000]

I have a bit more info on these MMP Turbos ball bearing replacement CT26, more still to come.

Also, ball bearing turbos are in the vast majority of cases unrebuildable. Id clarify that and the cost of rebuild and if there are special oil requirements.

I can clarify that it is rebuildable, by Luke as me manufactures the components, for a couple hundred dollars.

Also the exhaust housing is 0.46 AR but with a larger than stock turbine as mentioned above.
The compressor wheel is based on a garrett 3071 series 2 with mods, mainly to push the surge line further left.

 

[vwluv10338]

I posted in their FB thread but they did not get back to me with prices. Any idea on a price?

I have a bit more info on these MMP Turbos ball bearing replacement CT26, more still to come.


I can clarify that it is rebuildable, by Luke as me manufactures the components, for a couple hundred dollars.

Also the exhaust housing is 0.46 AR but with a larger than stock turbine as mentioned above.
The compressor wheel is based on a garrett 3071 series 2 with mods, mainly to push the surge line further left.

 

[diby 2000]

Warranty is international 12 months unlimited K's.
There is also the possibility of a group buy if there is enough interest.
He already has stockists in California, Alabama, Japan, Ireland, England and every state & territory in Australia.

I have also asked about a 'Bolt in kit' including hard lines for oil and water. If the interest is there this is also an option.
Same turbo will suit 1HD-T, 1HD-FT and 1HD-FTE.

Disclosure
I'm not affiliated with anyone, just came across this post on Facebook and made some phone calls.

PM me if your interested in a group buy.

 

[diby 2000]

I posted in their FB thread but they did not get back to me with prices. Any idea on a price?

I have been quoted RRP of AU$2250 but this month special of AU$1950 delivered.
NOTE this is without wastegate actuator which he will include for AU$180 (Garret or Turbosmart, I cant remember.

If a group buy goes ahead it could be a couple hundred cheaper than the discount price.

 

[slosh]

I may be interested in a bolt in kit. I've been holding off purchasing turbo until I get some time to sort an intercooler and gauges for 1hdft. I would like a reliable 25...ish psi turbo (preferably proven) to last a couple of hundred thousand km. Used as daily driver on hilly backroads, occasionally towing up same roads.
I was set on a GTurbo BB. Although I am fully confident in their after sales support, the "bad batch" stories have got me wondering if perhaps there may be a higher quality performance option out there?

There now seem to be several turbo builders offering similar power gains as GTurbo- but for me the question is which one will last the longest?