Sunray wrote: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.
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.
AE25 wrote: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?
Users browsing this forum: No registered users and 2 guests