The Mung Blue! Revisited. TURBO!

[Sunray]

So I took the motor out today and did a little tear down. Bearings not that bad but scored from foreign material entering, oil pump not that bad, journals on the crank are perfect.






Noticed a funny collection of shimmering metal in the oil pan. Popped the inlet off the turbo and found excessive radial and lateral play. The turbo is buggered and seems to have sent material into the motor.





Used turbo = fail.

[UtahSleeper]

Well, that sucks. But atleast it wasnt a fresh built motor, right? Going to just replace the bearings?

[Sunray]

No stock in Canada for 0.010" undersize bearings I just found out today. Even if I pony up for fast shipping they won't be here on time.

I'm considering dropping the original short block into the car, stock cam and all just to run the event.
Guy in Vancouver has a T28 GTiR used turbo to get through the event but after its clearly time to pay the bucks for a new ball-bearing unit.

[hemilove]

that blows man i hope you can get it going soon hey sunray can you do me afavor and show me how you have your 3 bar map sensor roughted on the megasquirt please

[Sunray]

http://www.youtube.com/watch?v=DreWJrlm ... el&list=UL

So I started out a few days before the event with my engine out and apart. Ended up firing it back together due to lack of bearings available in time. Some Dk members really helped out with offers of parts (thanks Gary!) and Matt even dropped a used turbo with me just before the event and it got me through!

Headed out Friday and missed the 7am ferry even though I was there almost and hour early. Had to drop a cat for my wife with a lady at a random Shell station on hwy10. Weird when out of nowhere Pete come walking up.

Got to Pitt Meadows and did my 3 runs of test and tune just before the rain started and never let up all night. Soaked to the bone.

Soe datalogging session throughout the weekend revealed that my injectors are a pinch too small and that the boost creeps to 10psi at 6000rpm+. Car pulled hard but now needs more grip. Made for some fun driving!

Saturday saw me in the first run group driving a semi-wet track. Makes for cool dori but not great times. later groups made much better times on r-comps in the heat.

We did a buffet social event at a local pub saturday night, got very little sleep.

Sunday was put-up-or-shut-up day! Ran in the third heat and times were very very improved. Overall there was 117 drivers, 28 or so in my group. When the dust settled I had 5th fastest time in group and PAX index putting me in 9th.

Saw some wicked cars, met some cool people, and the car did not break, win! Did the Scion FRS equalizer on sunday and the car felt just like my old corolla except for the incredible braking which in one corner buggered me for having the top time. One mistake and its done-just one run each.

Hopefully might come out there agin in the future, enjoy the vid!

Carlos, my map sensor in built into the ms3, do you want pics of the hose routing?

[hemilove]

isnt it in the ms2 v3.0 also???? i think it is but i dont know bc i did the build but then i read about it and dont know if i now need to install one if i have a lil hose plug that comes out of my ms2 v3.0

[Sunray]

Pretty sure my on-board one is 2.5bar. I simply ran vibrant hard plastic line with a small bit of tight fitting rubber at the port.

[hemilove]

Pretty sure my on-board one is 2.5bar. I simply ran vibrant hard plastic line with a small bit of tight fitting rubber at the port.

ok i will see what i can come up with

[AE25]

After 30 minutes or so of actual driving the oil pressure drops so that it can only reach 25lbs or so. Starts at 75 psi and drops.

This may not be relevant to your pressure probs at high rpm.. but i've had plenty of 3tgte pumps give out random high/low pressure at cold start and hot idle. Turns out it's usually caused by the pressure relief valve bore is worn and allows the piston to jam shut when cold. (causes high pressure on startup). You may be able to feel a ridge around the bore after this has happened alot. The valve drain hole routes back to the intake side of pump rotor (sucks piston to side of bore?) and it's this side of the bore that wears out. you'll get low idle pressure when the piston can move off center from the seat. and you can see the seat is no longer concentric with the bore. Pretty much all the old pumps i've checked so far have had an oval bore
Good thing with 3tgte pump, the top housing containing pressure valve is interchangeable with 2tgeu and maybe even pushrod too so can swap the 3tgt pump rotor and pickup over.

wish i'd seen your garrett conversion sooner! seems i had all the same issues doing the conversion. still had to cut the engine mount for oil drain clearance. although i made the manif to turbo adaptor thicker and used cap screws. luckily had plenty room for 3" dump pipe in E7 chassis with rack and rhd.
some pics of it here http://toycrazy.net/tech/3tgte-t28/

question about the ms3... i've bought all the hardware incl ms3x expander. about to get into soldering. Curious as to whether you found someone with a base map to start from? or did you adjust all the settings using the guidelines to get a stable idle, then go from there?

[Sunray]

After 30 minutes or so of actual driving the oil pressure drops so that it can only reach 25lbs or so. Starts at 75 psi and drops.

This may not be relevant to your pressure probs at high rpm.. but i've had plenty of 3tgte pumps give out random high/low pressure at cold start and hot idle. Turns out it's usually caused by the pressure relief valve bore is worn and allows the piston to jam shut when cold. (causes high pressure on startup). You may be able to feel a ridge around the bore after this has happened alot. The valve drain hole routes back to the intake side of pump rotor (sucks piston to side of bore?) and it's this side of the bore that wears out. you'll get low idle pressure when the piston can move off center from the seat. and you can see the seat is no longer concentric with the bore. Pretty much all the old pumps i've checked so far have had an oval bore
Good thing with 3tgte pump, the top housing containing pressure valve is interchangeable with 2tgeu and maybe even pushrod too so can swap the 3tgt pump rotor and pickup over.

wish i'd seen your garrett conversion sooner! seems i had all the same issues doing the conversion. still had to cut the engine mount for oil drain clearance. although i made the manif to turbo adaptor thicker and used cap screws. luckily had plenty room for 3" dump pipe in E7 chassis with rack and rhd.
some pics of it here http://toycrazy.net/tech/3tgte-t28/

question about the ms3... i've bought all the hardware incl ms3x expander. about to get into soldering. Curious as to whether you found someone with a base map to start from? or did you adjust all the settings using the guidelines to get a stable idle, then go from there?

Thanks for the insight! I will be taking a very close look at this issue once again.

For my ms3, I first calibrated all the sensor settings, used the base that comes preloaded with the intitial firmware, and then set the basic settings.

I did a basic tune by "feel" and memory. I got away with it because I diagnose and repair brand new vehicles everyday so I was able to anitcipate the engine's requirements fairly easily. Then once I was confident with it I gave the wideband more authority and did a few autotine sessions with tunerstudio. Then forever fine tuning each time I change things or don't like how it feels.