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HybridZ

San Antonio 3.1L Z


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The 40s are great. Still tweaking and messing with jets. I bought these used and after the cleaning and drilling out a couple of jets I should have bought new ones..

 

Also bought the Innovate Wideband 02 meter. I can't image trying to figure the jetting procedure with this tool. 

 

 

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I bought the Eibach springs which lower the car relative to the stock springs. I took out the Tokico springs I've had on the car for years. They really lowered the car more than I wanted and had a really stiff ride. Very happy with these Eibachs....Good ride and no problem with large speed bumps. I woundn't use them for a track only car but great for the street. Pic attached.

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Have about 4,000 miles on the motor now. Carbs are really tuned well, running 34 degrees all in.

Tested the compression, engine warm and carb wide open.

#1 170

180

180

175

180

182

 

Good numbers. Using the Schneider stage 2 cam, so don't know how much of an impact overlap has on static compression numbers.

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Thanks! In a spot where if I I lean it out for better idle I get popping on over run. So, it's a balance act currently. Still looking at different options on idle jets but great improvement since replacing the leather seals. Steady AFRs

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My outside passenger door handle is broken. Taking off the door panel and wow.....Now, the previous owner (married couple) were pretty cheap. Like owning a daily driver for 32 years, using spare carpet for floor mats and respraying the car, twice.....Hell, if you can't spend the cash for new floor mats on a car you paid off 27 years ago, that saying something.

Here's what I found behind the door panel. Freaking duct tape...My god, that would not be much to fix right.

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Edited by steve260z
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Hey Steve... I really enjoyed reading your build thread. You did a great job capturing your progress, challenges and breakthroughs. I had several smiles this morning with my coffee.

 

Triple DCOEs have a steep learning curve indeed! I assume you have 34 or 36mm chokes / main venturis in your 40 DCOEs? With a stroker... 34-36mm chokes are mandatory. I'd say 34mm for your build, as the 36mm don't offer much power gain and the 34mm have better drivability.

 

Cheers, my friend. Nice work!

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Well, thanks!!! I've had a grand time working on the project and positing the various pics. Ya, I'm running 36 chokes. Now, I think I have some 34s round here and reading your post (think it was yours) regarding the small increase in power verses 34s, I'll probably put those back. I do have the 36s dialed in pretty well. I currently have the other problem hanging around regarding the strange dying issue. Need to solve that problem first. You know these cars, something new always pops up regardless of how small it is.

Thanks for the smiles......

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After 10 minutes of driving, when I come to a stop the car will act like its going to die or will die. This occurs about 50% of the time. If this does not occur I can let the car idle in the driveway and it will start acting like its going to die and will eventually within the next 30 minutes. I can then restart in the car with about a 4 or 5 second crank. Now, if its not in this state of just dying I can turn the car off and restart with a 1 or 2 second start...I think the clues lie here in this 4-5 second crank to start. Now, I've but a voltmeter on the battery as the car dies and the meter reads a consistent 14-14.3 volts while running and dying. When the car dies I can still hear the carter fuel pump running. When it dies the O2 meter will drop down to about 10 AFR from the usually 12 at idle. Now, not sure if this richness is caused by the actual problem or just the result of low bouncing idle at the point of dying which would mess with the vacuum signal the carb sees. Obviously I'm freaking stumped. As mentioned above the 4-5 second crank time on restart is interesting. I've been thinking maybe the fuel is getting too hot, pump is crapping out (only 5K miles on it), all kind of esoteric different Weber ideas and many other ideas...

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Ok. I've laid down a basic return line to see the results. So far so good. The rubber fuel line certainly feels cooler. Was pretty hot. I had the line running in front of the motor, the fan blowing on it with hot air. Its just a quick fix. If this works I"ll do a more professional job. Here's a quick video. 

 

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I put the 34mm chokes back in to compare to the 36s I've been running. On a different thread some flow measurements showed very little difference between the two when fitted in DCOE 40s. Not on my car....34s didn't rev as quickly and produced slower acceleration. 

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