Engine Specific Info and Questions > mTDI Mechanical TDI Conversions
not impressed with mtdi in mk2 golf
damac:
its taken me a year to get to this point after lots of research and working on it myself. right now i have just taken the car up and down a road in 1st and second gear. i just got my gauges installed and need to wait a few days for windshield install to dry.
i have an alh with rover 300 pump stock, stock injectors, and holset he2000wg with a boost controller allowing peak boost at 20 psi. boost gage is taking reading from the turbo charge pipe?
i think i have the car timed at 1.54mm. not allot of clack. no puffing smoke at idle and it starts right up with no glowplugs in 50 degrees. there is some hazy smoke when i stomp on it in the driveway.
i am using sp auto intercooler/radiator.
cars oil pressure after warmup cycle reads 24psi at flange idle.
coolant temp reads 197 with sender in side head fitting and it took some driving and a while to warmup in driveway before this first fan cycle hit. using the heater cools temps even lower, heat isn't hot hot but from what i read its normal for these engines.
so these initial runs are just making sure everything works, not leaking, etc. im thinking its healthy, i can hear the turbo whistle, i have no exhaust on right now. i assume since boost builds fast i don't have leaks.
i have not hit 1000 egt yet when stomping on it.
i think i have felt the rev limiter in this application at those times where car hits a wall. i can hit it at idle too with foot down to the floor. i have seen 6psi on boost gage when doing that.
so i peeled out and revved hard in 1st gear, seems stronger than my rabbit 1.6td. second gear if i pounded into it and stomped on pedal continued. im not sure how strong this is and if it will hold up on hills better than rabbit at this point. what scared me is with car rolling in second gear and stomping on it there is a dead zone which reminds me of times with the rabbit. i was hoping for maybe a pause and then building boost but its really gutless down low. im not sure if thats just second gear with the 02a diesel tranny im using or what. im worried i will be driving at times and not be able to recover it was very wierd feeling. couldn't see starting in second which is kind of what i was trying to do with a slow rolling start.
just wanted to check in with people smarter than me.
i am curious if its normal for the car to boost so high with stock rover pump settings? what psi is the max for stock alh engine?
what happens in my case if you add fuel and did the governor mod without upping the boost?
i want to get great mileage with this car and commute 260 miles/day. my drive is pretty much freeway with zig zags and transitions where i need to have some power to pass, etc. mostly hope to travel at times so i can keep the car steady cruising at 80mph
libbydiesel:
I assume you are using the ALH hub and sprocket. The LR hub is installed with the slot/hole lined up when the keyway on the pump shaft is pointing at the delivery valve for the #4 injector line. The ALH hub needs to be installed with the keyway pointing at the #1 delivery valve (shaft rotated 180°). Is there any chance you missed that step? It will start and run 180° but will be a lackluster.
damac:
thank you, i did do my reading on that one and had the dial gage in when mounting and pinning the alh hub to the rover pump. i also shimmed and drilled the timing plug hole on the pump so i could fit the alh timing tool pin in there instead of letting something wobble around. so im pretty sure im good there.
i wouldn't call 1st gear lethargic at all. and maybe not even second when stomping on it. for some reason i assumed i might be able to start off in second gear just rolling and stomp on it and have the car rev out, then hit boost and climb. my rabbit 1.6td seems like it would do better in this case off the bottom. but that car stock is also a slug when chopping the throttle and trying to get back into boost. many hills i have been on i had to keep the pedal to the floor to maintain up a grade, etc.
it just really sticks out to me, i shall see what happens i guess when i really get to drive it i am just worried. i guess this is a drawback to the vnt turbos in these cars right? i won't be able to play around at low rpms as much and will need to attack like with the rabbit.
i am hoping i can get to 70-80mph speeds fast when merging onto freeway in 4th gear i assume? i also hope while cruising in fifth gear that i have the ability to regulate some power with the throttle, unlike the rabbit which is all or nothing.
libbydiesel:
--- Quote from: damac on March 05, 2018, 03:01:51 pm ---thank you, i did do my reading on that one and had the dial gage in when mounting and pinning the alh hub to the rover pump. i also shimmed and drilled the timing plug hole on the pump so i could fit the alh timing tool pin in there instead of letting something wobble around. so im pretty sure im good there.
--- End quote ---
In your response you do not say anything about making sure the shaft keyway was pointing at the #1 delivery valve when setting the plunger lift so I want to make sure you really get what I'm saying. You can get the same plunger lift reading 4 times per pump shaft revolution - once for each injector. The rover hub/pin is set for VW's #4 injector. In order to correctly time the VW, though, you need to set it for the #1 injector. This means that the VW hub needs to be installed rotated so the slot is 180° from where the slot was in the Rover hub. Are you sure that you aligned the keyway slot in the pump shaft with the #1 delivery valve prior to adjusting to your 1.54 plunger lift? If not, and the hub is 180°, it will still start and run but will not have the power it should.
As far as off-boost performance, the ALH should give off-boost performance similar to a 1.6TD when it is boosting full stock boost. With decent fueling and 20lbs of boost in a mk2, that car should really rip.
damac:
the keyway when finding tdc with gauge was pointing towards the top rear delivery valve looking at pump installed installed in the car?
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