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Author Topic: Waste gate control?  (Read 2689 times)

Reply #15November 13, 2021, 09:16:52 pm

scrounger

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Re: Waste gate control?
« Reply #15 on: November 13, 2021, 09:16:52 pm »
For sure ORC. Not much of a world beater, mine.

Hard to build boost without a pressure drop.

It actually runs okay now but thought maybe just a little more.

I found through experimentation that bigger bore exhaust is great for high rpm numbers but throttle response and low end are quite another, besides I just put a new headpipe on last summer. :)
M2 Jetta TD.  Northern Missouri

Reply #16November 16, 2021, 02:04:06 pm

phaetonv10

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Re: Waste gate control?
« Reply #16 on: November 16, 2021, 02:04:06 pm »
It's either a k24 or a k14.
Boost is fed through the metal line.
The 6mm screw is to adjust preload on the wastegate spring.

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Reply #17November 16, 2021, 03:28:58 pm

scrounger

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Re: Waste gate control?
« Reply #17 on: November 16, 2021, 03:28:58 pm »
Thanks
I was thinking it was a k24 from the description above. Plan on taking it for a drive this afternoon.

Have increased the preload a mm.
M2 Jetta TD.  Northern Missouri

Reply #18November 17, 2021, 05:05:37 pm

scrounger

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Re: Waste gate control?
« Reply #18 on: November 17, 2021, 05:05:37 pm »
Finally was able to do a test to see if the boost changed, with one turn in on the wastegate control, It went up a pound. The car felt like it came up faster.
I was getting a boost starting at 25mph in 3rd and 30mph in 4.

Since "normal" is 9.4-10.3 and I am getting 9psi now and can really feel it come on, I think I will leave it alone for now.

My run consisted of picking up 600 pounds of animal food. Wasn't nearly as peppy on the way back.

« Last Edit: November 17, 2021, 11:53:43 pm by ORCoaster »
M2 Jetta TD.  Northern Missouri

Reply #19November 17, 2021, 11:54:20 pm

ORCoaster

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Re: Waste gate control?
« Reply #19 on: November 17, 2021, 11:54:20 pm »
Glad you got some results from all your efforts.

Reply #20November 18, 2021, 04:06:40 pm

scrounger

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Re: Waste gate control?
« Reply #20 on: November 18, 2021, 04:06:40 pm »
Had a road trip and really like the way the car runs. It is so much quieter,  At low speed, I can run 1 gear higher than it did before the last fueling change. Even though I can't see how the max boot setting would be a factor, at low speed there is only a couple of pounds that start at lower rpm.

Ran it to about 85 for 20 miles No overheating or other weirdness.
« Last Edit: November 19, 2021, 12:45:01 am by ORCoaster »
M2 Jetta TD.  Northern Missouri

Reply #21November 19, 2021, 02:05:40 am

fatmobile

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Re: Waste gate control?
« Reply #21 on: November 19, 2021, 02:05:40 am »
Nice.
 What kind of boost were you getting at 85?
Got an EGT gauge?
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Reply #22November 19, 2021, 08:20:10 am

scrounger

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Re: Waste gate control?
« Reply #22 on: November 19, 2021, 08:20:10 am »
I think around 6-7 but honestly don't remember looking at it too much ,maybe at 2/3rds the way to the floor. I think one time when accelerating I had the pump to the floor. for a few seconds. Going down the road at 70 it has about 3-4 with steady fuel.

No EGT, one of the reasons I don't want to change boost or fuel too much. The mixture control still has safety wire on it. I did rotate the diaphragm on the boost enrichening 180°  moving the fueling cone from lean but didn't rotate the star wheel under it. I am not aware of smoke when accelerating.

Most of my driving is under 40 on rally style lightly traveled roads, Most of the time I don't see other traffic, occasionally there is other traffic, kids, horses, a good place to get the motor up to temp before turning onto 2 lane blacktop roads. The biggest change in driving is surprisingly at low speed part throttle going up hills. It is easier to feel seat of the pants. Seems odd as most of the changes that I have made seem to on the higher end. I do feel boost a lot lower.

Overall happy with it. I imagine the economy has been affected some. Cant have power  without fuel.

M2 Jetta TD.  Northern Missouri

 

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