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> BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time...
tygaboy
post Mar 9 2022, 09:44 AM
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QUOTE(Chris914n6 @ Mar 9 2022, 12:18 AM) *

One little issue I see.

The air temp sender is usually located in the air box which is a controlled environment. Where you have it, it is likely to heat soak at lights and run lean or get wet, cool from evaporation, and run rich.


@Chris914n6 - Thanks for the observation, I really do appreciate it as there's plenty I don't know! The location wasn't without some thinking - I noodled on it and spoke with my tuner. Here's the current thinking:
- The MAT sensor used to sit between the ITBs, directly under the engine lid grill. So in an "even worse" location - and it didn't create any noticeable issues.
- My tuner said that with the Holley speed density model, MAT location ends up having a small impact on getting a good tune. I was surprised to hear this but I'm no tuner.
- Once I fab the air box, the sensor will be installed in a more traditional location. So in the final version, it shouldn't be an issue.

And you know me and transparency: I'm learning as I go. If any of this creates problems, I'll post about it.
Thanks again!
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tygaboy
post Mar 10 2022, 07:17 PM
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Results are in:
Short version IT RUNS!!!!

Longer version:
The remote tuning session was a huge success! It took about 3 minutes for my tuner to assume control of my laptop, download the updates into the ECU and setup/configure the specific sensors I'm running.
Then he says "OK, so is it ready to start?" I glace around the car and look at all the changes I've made since it last ran and I'm like: (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/wacko.gif) (IMG:style_emoticons/default/unsure.gif)

"Sure!" I say, with all the bravado I can muster. And I turn the key one click to ignition hot. The fuel pump whirs to life, the H20 pump starts pumping- as does my heart! I think to myself "OK, here we go - I hope you got all this stuff right.." and I advance the key to "start".

Urrrr, urrr, urrr, VROOOM! It fires right up like it had been running 20 minutes ago. A total non event.
OK, so then we spent about 20 minutes adjusting the fuel map and a bunch of stuff I'd never seen before and the day closes with a 775 RPM idle and nice, snappy (DBW) throttle response!

I will say, I did take care with all the wiring and fab work in this round of changes but I'm always amazed when what I did actually works. And yes, EVERYTHING works!

@andyrew @cairo94507 thanks for your votes of confidence - you proved to be spot on.

Next step? (IMG:style_emoticons/default/driving.gif)

See you all at WRC 2022!
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markhoward
post Mar 10 2022, 09:00 PM
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Everything works! Not a bit surprised!! Must feel good to be back up and running!!!
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Shivers
post Mar 10 2022, 10:15 PM
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(IMG:style_emoticons/default/smilie_pokal.gif)
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Andyrew
post Mar 10 2022, 11:01 PM
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Heck ya!!!!! Some more road tuning and you’ll be golden!!!

You’ve done a heck of a job Chris!!! Congratulations!
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Retroracer
post Mar 10 2022, 11:31 PM
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nice !!! Always to good to get things back running again after changing things out.

So - time for a at least 3 airbox design iterations before WCR 2022 (IMG:style_emoticons/default/smile.gif) ?

- Tony
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tygaboy
post Mar 11 2022, 12:14 AM
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QUOTE(Retroracer @ Mar 10 2022, 09:31 PM) *

nice !!! Always to good to get things back running again after changing things out.

So - time for a at least 3 airbox design iterations before WCR 2022 (IMG:style_emoticons/default/smile.gif) ?

- Tony

@Retroracer Tony - you know me well! (IMG:style_emoticons/default/biggrin.gif) I'll be starting on V1 soon...
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tygaboy
post Mar 11 2022, 12:15 AM
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And I can't leave my momentous "starting day" with no pic. My friend Bill stopped by and I couldn't resist snapping this pic. Zoom in and check out the paint on his Speedster. Unreal.

It was a lovely day at the Red Barn...


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Dion
post Mar 11 2022, 05:10 AM
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Wow man, awesome! Drive the hell out of it now! Did someone say air box? (IMG:style_emoticons/default/first.gif)
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Cairo94507
post Mar 11 2022, 08:18 AM
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@Tygaboy - OK, now you get to take it for a nice ride and enjoy all that work. WCR is going to be a blast. (IMG:style_emoticons/default/beerchug.gif)
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76-914
post Mar 11 2022, 09:12 AM
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Congratulations Chris. When it's finished you'll experience the male version of "empty nest syndrome" and want to start another. (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Mar 11 2022, 09:53 AM
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QUOTE(76-914 @ Mar 11 2022, 07:12 AM) *

Congratulations Chris. When it's finished you'll experience the male version of "empty nest syndrome" and want to start another. (IMG:style_emoticons/default/beerchug.gif)


@76-914 Kent, you're hilarious!! You said "finished"... (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif)
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roundtwo
post Mar 11 2022, 04:08 PM
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Fantastic Chris- looks like I came by a day too soon- had no doubt you’d getting going without major bugs. Incredible electrical work. (IMG:style_emoticons/default/piratenanner.gif)
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tygaboy
post Mar 14 2022, 09:12 AM
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Boring pic? Not to me. We are back on the road!
Just a brief test run to capture some data in the ECU that the tuner uses to, well, tune.

The short update is classic good news/bad news.
Let's start with the bad:
- First, it isn't really that bad. The tune needs work - and we were expecting that. When we did the first tune session, I'd left a major vacuum port unplugged and because chasing that allowed the engine to warm up a but, it ended up masking settings needed at "totally dead cold" start up. As it stands, I have to blip the throttle a bit for 30 seconds or so else it struggles and mostly dies.

- Next, it's not smooth right off idle and the pedal isn't as responsive as I think I want it. When I try and blip in a heel/toe, the blip doesn't do much.

Now the good:
- The DBW pedal is a joy, particularly compared to the cable/ITB set up. It feel like I'm driving a new car.
- The pedal response is programmable so I've no doubt we can set it to feel and respond just how I want. Plus, these tuning sessions are training for me to be able to learn how to be self-sufficient - for example, I'll know how to program the pedal on my own going forward.
- The new exhaust sounds really nice. It's actually quiet at idle.

In short? We're getting there.


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mikey63
post Mar 14 2022, 10:02 AM
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That's one hell of a accomplishment Chris!!!
Now put some miles on it!!!
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tygaboy
post Mar 15 2022, 07:33 PM
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This morning's remote tuning session addressed the currently known issues. It had rained last night and was still cold/damp when we wrapped up. Dave, my tuner, asked if I was going to drive it. I figured with the crappy weather situation I'd pass. But in the end, I couldn't resist. Dave's guidance was keep it under about 4500 RPM - and I always do as I'm told...

OMG. I'd swear it pulls harder and is more "driveable" than the ITBs ever were. And the pedal is like butta! And the tune isn't even complete.

I'm very happy.

I plan a few more drives to gather more data and get additional seat time so I can provide more detailed and thorough feedback. More as we make progress.

Oh, and I added some LED interior lights in the foot wells that come on when the doors are opened. I swear, it's like a luxury car. (IMG:style_emoticons/default/lol-2.gif)
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bkrantz
post Mar 15 2022, 09:11 PM
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Congrats!

So just a few minor things on the punch list?
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Krieger
post Mar 15 2022, 10:04 PM
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Nice! Sounds like all your improvements were worthwhile! (IMG:style_emoticons/default/beer.gif)
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Cairo94507
post Mar 16 2022, 07:14 AM
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@Tygaboy - WCR here we come! (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Mar 16 2022, 10:49 AM
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Party at the Red Barn! Apparently, even the insects are interested in seeing the 914 and its new set up! (IMG:style_emoticons/default/laugh.gif)
So yesterday, I'm working away on my car when I suddenly notice there's been a growing sort of "buzzing" noise. I turn around and there's a LARGE swarm of bees hanging out RIGHT outside my shop door! Yikes!
I immediately close everything up and thankfully, they didn't make it inside. However, they did decide the gutter area just above the side door would be an excellent spot to establish a new hive.
Zoom in on that first pic and you'll get an idea just how many visitors there are...!

A quick call to the local bee keeper society and John heads right over - in a very cool '54 Chevy pick up!
Anyway, he thought he'd enticed them into a bee box but when he came back last evening to collect them, the colony had decided they REALLY did like that gutter. He's back this morning with his bee vacuum and some other bee herding tools.
As Bullwinkle said "This time, for sure!" Fingers crossed!
Never a dull moment at the Red Barn...


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