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Just Another Damned Z Car Project Thread


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I used these folks. They were easy to work with. You can send them your unit to rebuild or buy theirs and send in a your core. They will also powder coat the booster if you like. Mine came back with a nice primer coat ready for paint. Very reasonable. Little over $100 a few months ago.

North

Power Brake Exchange, Inc. - San Jose, Ca. 
Phone: (408) 292-1305  Fax: (408) 294-6817

 

South

Power Brake Exchange, Inc. - Bell Gardens, Ca.
Phone: (562) 806-6661  Fax: (562) 806-3570

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Just now, Yarb said:

I used these folks. They were easy to work with. You can send them your unit to rebuild or buy theirs and send in a your core. They will also powder coat the booster if you like. Mine came back with a nice primer coat ready for paint. Very reasonable. Little over $100 a few months ago.

North

Power Brake Exchange, Inc. - San Jose, Ca. 
Phone: (408) 292-1305  Fax: (408) 294-6817

 

South

Power Brake Exchange, Inc. - Bell Gardens, Ca.
Phone: (562) 806-6661  Fax: (562) 806-3570

Thanks Yarb! I think it's a family operation. The kid spoke up on Facebook and said he was in SoCal...

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Have you thought about using the 15/16 Mc off the 79zx? I upgraded to the 79 booster and master cylinder on my 78. Bolted right in with clearance. The booster is the same depth but larger in diameter. Haven’t had the car on the road yet but what I’ve read it performs well. 

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1 hour ago, Yarb said:

Have you thought about using the 15/16 Mc off the 79zx? I upgraded to the 79 booster and master cylinder on my 78. Bolted right in with clearance. The booster is the same depth but larger in diameter. Haven’t had the car on the road yet but what I’ve read it performs well. 

I’ll look in to it, thanks!

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7 hours ago, conedodger said:

@grannyknot, my proximal problem is finding a DBW throttle body that has the proper bolt spacing to be bolted up to the L28 intake manifold. Mind measuring your bolt spacing? 😎

Do you mean the electric actuator that controls the throttle opening and closing? The one I'm using opens and closes 6 TBs

Edited by grannyknot
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On 10/8/2020 at 7:52 AM, conedodger said:

So Yarb, 

I looked in to it. Turns out I didn’t have to look far. That’s what is on the car now! 

@Yarb, indeed, that is what I just pulled off. I still think I will go with a 1" Wilwood. I'm going with bigger brakes too as I'm doubling my previous HP...

IMG_1494.jpg

Edited by conedodger
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Are you looking to upgrade the booster? From what I’ve read on different posts was that made a big difference with the willwood as well. Something to do with the brake pedal travel being shorter.

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Well, I have mine as a core and I would think a 73 240 would be less common than the later ZX's. Which size did you go with? I tore all of this out so I could refinish the engine compartment. I've owned the care for 40 years and I have painted the exterior 3 times. Once red, once yellow, then back to the original white but I've never painted the engine compartment and it looked so dirty after I did the last repaint. 

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I'm hoping to go Drive by wire (DBW) with this engine. If you've been following along, you know that I am using an N42 intake so I need to find a throttle body that bolts up and has the throttle actuator and throttle position sensor installed. It should be in the 70mm - 75mm range. Anyone know of such a beast? I know that HybridZ is probably the place to go for this, but I can't seem to log in and the email that I originally signed up with is long dead.

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Here's a couple pics of what I'm talking about. Not completely sure of the years of application, but it looks like this. The heat sink thingie on the right is the DBW actuator.

P1120303.JPG

And here's some pics from ebay, etc. The connector has six connections in it. I'm assuming the TPS feedback element is built into the same section, so some of the wires would be for DBW and some of the others are for TPS feedback.

So maybe you could move the actuator over to a different throttle body, or if there is enough meat, maybe you could bore this one out to your liking?
sentra dbw 5a.jpg

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Captain,

Modern TPS uses really two TP sensors to determine throttle position. It has one that measures the position from one direction, and a second that measures it from the other. That actually does look meaty enough to bore it and put a new butterfly in it. Thanks! 

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Glad to help.

So I went back through my notes, and I cannot be 100% sure that the mounting holes are the same as the Z intake manifold. I think they are, but my notes are inconclusive. I messed around with one of those in a junkyard, but (since I wasn't interested in DBW) I didn't buy it and bring it home. I believe I compared it to an earlier Sentra TB (which I AM positive is the same mounting pattern) and it was the same, but not 100% sure. Just don't want you to waste money on my account.

And same thing for the butterfly plate diameter. I believe it's the same 50mm as the stock Z plate, but can't guarantee it. In this case, it would be better if I were wrong and it were actually larger...

In any event, might be worth a trip to a junkyard to get some measurements?

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13 minutes ago, Captain Obvious said:

Glad to help.

So I went back through my notes, and I cannot be 100% sure that the mounting holes are the same as the Z intake manifold. I think they are, but my notes are inconclusive. I messed around with one of those in a junkyard, but (since I wasn't interested in DBW) I didn't buy it and bring it home. I believe I compared it to an earlier Sentra TB (which I AM positive is the same mounting pattern) and it was the same, but not 100% sure. Just don't want you to waste money on my account.

And same thing for the butterfly plate diameter. I believe it's the same 50mm as the stock Z plate, but can't guarantee it. In this case, it would be better if I were wrong and it were actually larger...

In any event, might be worth a trip to a junkyard to get some measurements?

It shouldn't be a problem Captain. I made a foam core template of the gasket so I can go into the Pick and Pull with proof before I buy!

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