Richie Rich's ZHP build thread

[johnrando]

Awesome shop and updates. Love how you pulled the birthday card for what YOU wanted to do.

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[ItsRichieRich]

Awesome update, and that's a helluva shop you have access to.... wow.

Could the stumble / hesitation be from VANOS? From Beisan Systems (link):

"What are the symptoms of a failing vanos?
Overall loss of torque and power, particularly in the lower RPM range, < 3k. Bogging then surging at 3k RPM. Uneven power distribution and RPM transition. Engine hesitations in the lower RPM range, < 3k. Louder idle and intermittent idle RPM hiccups. Difficult takeoffs. Loss of power and bogging when AC on. Increased fuel consumption."

Got any more photos of that prerunner?

I must say, I am pretty fortunate to have access to our shop. We use to be a full on service and repair shop in Escondido but my boss sold that company a few years ago to focus on manufacturing tools. He had 2 in ground lifts installed for when we do R&D, video instructions and for our personal cars. He's a tool nut so we have access to ALL types of tools.

So my "stumble/bog" issue is resolved after getting the DME updated. What's weird is, the shop foreman (who we are really good friends with) told me that the DME might crash, and if it does, they won't cover it. I took the gamble anyways and it worked out. I am still going to address the vanos since it's probably due for it anyways at 107k miles. I have yet to go through a fillup as the previous owner handed me the car with a full tank, but I will take note of gas milage.

Here is a few shots and a quick video we did with the prerunner:

That is one sweet shop and truck! Also nice front sway bar, Hotchkis being hollow saves weight over the solid options

Thanks, pretty fun vehicle to drive haha. I am going to get a match rear sway bar now.

Awesome shop and updates. Love how you pulled the birthday card for what YOU wanted to do.

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She was happy, but not all at the same time

[BMWCurves]

+1 to what everyone is saying - very cool shop, I am thoroughly envious.

Glad you fixed your stumble - at what RPMs did it usually occur? And was it at wide open throttle or...?

[ItsRichieRich]

+1 to what everyone is saying - very cool shop, I am thoroughly envious.

Glad you fixed your stumble - at what RPMs did it usually occur? And was it at wide open throttle or...?

Thanks! Once things start to clear up, I think I will propose a SoCal ZHP meet up at the shop.

The stumble issue happens around 2.5k rpm till about 3k. After that, it was good. It happened whether it was partial throttle or wide open (wide open was more noticeable). I will be addressing the vanos next as it's due. I reached out to the previous owner to confirm and he said he has not done it yet.

Side note: Is there a physical difference betwen the ZKW and AL headlights? I am getting ready to install my angel eyes/halos and noticed that my headlight covers have ZKW on the passenger side and AL on the driver side. I didn't look to much into it, but my OCD is killing me and I need to have matching headlights. Wanted to have matching headlights before I started the angel eyes.

[johnrando]

You mean outside size or the internals (where you'd put the angel eyes)?

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[ItsRichieRich]

You mean outside size or the internals (where you'd put the angel eyes)?

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Honestly, every aspect. Just trying to see if I need to change the whole headlight (passenger side since it's ZKW) to AL. Or if they're all the same, get the projector from TRS and call it a day. But I don't want to get the projectors from TRS if the housing is different or the high beam reflectors are different.

[sillieidiot]

Thanks! Once things start to clear up, I think I will propose a SoCal ZHP meet up at the shop.

The stumble issue happens around 2.5k rpm till about 3k. After that, it was good. It happened whether it was partial throttle or wide open (wide open was more noticeable). I will be addressing the vanos next as it's due. I reached out to the previous owner to confirm and he said he has not done it yet.

Side note: Is there a physical difference betwen the ZKW and AL headlights? I am getting ready to install my angel eyes/halos and noticed that my headlight covers have ZKW on the passenger side and AL on the driver side. I didn't look to much into it, but my OCD is killing me and I need to have matching headlights. Wanted to have matching headlights before I started the angel eyes.

Not really. Just the bottom of the headlight. But you can just swap the mount that it sits on and they will work fine. Totally interchangeable.

[sillieidiot]

Honestly, every aspect. Just trying to see if I need to change the whole headlight (passenger side since it's ZKW) to AL. Or if they're all the same, get the projector from TRS and call it a day. But I don't want to get the projectors from TRS if the housing is different or the high beam reflectors are different.

oops didn't see this. Yeah the insides are different. Different projector bowls, different mounting. They use different ballasts/igniters. The bulb is the same. I'm pretty sure the high beam bowls are different as well. I remember ZKW being like plastic and AL are ceramic.

[Will]

Thanks! Once things start to clear up, I think I will propose a SoCal ZHP meet up at the shop....

Please do!

[ItsRichieRich]

oops didn't see this. Yeah the insides are different. Different projector bowls, different mounting. They use different ballasts/igniters. The bulb is the same. I'm pretty sure the high beam bowls are different as well. I remember ZKW being like plastic and AL are ceramic.

Is there a part # for the AL headlight brackets or do those typically come with the headlights? I ask because my car has AL on the driver side and ZKW on the passenger side. Looking for a used set of AL to replace the passenger side ZKW. From what I can see on RealOEM, bracket part #s are the same but they don't disclose the bracket fitment.

Please do!

I'll probably start a thread unless you know of a thread I should revive?