 BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time... |
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| tazz9924 |
 Aug 31 2020, 08:39 PM
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#2941
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Senior Member  Group: Members Posts: 703 Joined: 31-May 15 From: Mooresville NC Member No.: 18,779 Region Association: None  |
Congrats! who knew art could roll!
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| Cracker |
Aug 31 2020, 09:08 PM
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#2942
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States 
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What a long road Chris - way to stick with it, pal!
Tony/Cracker |
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| Chris914n6 |
Aug 31 2020, 10:27 PM
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#2943
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Jackstands are my life. Group: Members Posts: 3,318 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
Love the build and glad to see you made it to this point, but...
NEVER NEVER NEVER NEVER NEVER press the gas pedal when starting an EFI car. Never ever! In fact, give it a few seconds after startup to stabilize before pressing the pedal at all. The ECU is recording a baseline for air temp & pressure & stuff to calculate idle speed. The Holley should be self learning after initial setup. Also, pulling the key out only engages the steering lock - no electrical involved. And if it hasn't been mentioned yet, the pump running for only a few seconds is normal. Part of EFI programming. I usually do a 3 second pause when turning the key from ON to START to build pressure, then the engine fires quickly. If it's been a few weeks I have to cycle a few time before I don't hear 'burps' in the tank. QUOTE(tygaboy @ Aug 29 2020, 04:17 PM)  1 step (pedal?) closer to (IMG:style_emoticons/default/driving.gif) (IMG:style_emoticons/default/driving.gif) (IMG:style_emoticons/default/driving.gif) ! And starting it is now officially a non-event! https://www.youtube.com/watch?v=lNHZMd0tg_Y |
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| Krieger |
Aug 31 2020, 10:35 PM
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#2944
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Advanced Member Group: Members Posts: 4,707 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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You did it! Congratulations! (IMG:style_emoticons/default/smilie_pokal.gif) (IMG:style_emoticons/default/smilie_pokal.gif) (IMG:style_emoticons/default/smilie_pokal.gif)
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| jd74914 |
Sep 1 2020, 12:26 AM
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#2945
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
Awesome!! Sounds great from here!!! (IMG:style_emoticons/default/drooley.gif) (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/first.gif)
QUOTE(Chris914n6 @ Aug 31 2020, 11:27 PM) NEVER NEVER NEVER NEVER NEVER press the gas pedal when starting an EFI car. Never ever! In fact, give it a few seconds after startup to stabilize before pressing the pedal at all. The ECU is recording a baseline for air temp & pressure & stuff to calculate idle speed. The Holley should be self learning after initial setup. Please clarify? No aftermarket ECU I know of has control logic like that...those doing barometric correction from MAP sensor take a baseline measurement between key on and crank usually. Totally agree you shouldn't need any pedal to start, but it's not because there is some calculation happening. High idle speed may be by design until warm. |
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| Cairo94507 |
Sep 1 2020, 06:01 AM
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#2946
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Michael Group: Members Posts: 9,750 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California
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That is so exciting. I am sure you will have the brakes, throttle, etc., dialed in in no time. Congratulations on a major milestone. (IMG:style_emoticons/default/smilie_pokal.gif) (IMG:style_emoticons/default/beerchug.gif)
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| Olympic 914 |
Sep 1 2020, 06:31 AM
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#2947
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Group: Members Posts: 1,663 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States
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Congrats... (IMG:style_emoticons/default/piratenanner.gif)
Remember the feeling of driving mine for the first time in 20+ years. |
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| Andyrew |
Sep 1 2020, 07:37 AM
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#2948
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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Awesome!!!! HUGE congrats!!!!!
Maybe a cam lever for the throttle? Clutch being an on/off switch is kinda normal for big power clutches. Exhausts and fresh engines are typically really loud when first started. Mine was also incredibly loud, but was running lean. Also cold starts are always loud. It sounds fine in the video I think you'll get used to it (IMG:style_emoticons/default/smile.gif) |
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| Cracker |
Sep 1 2020, 08:02 AM
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#2949
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States
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[quote name='Andyrew' post='2847625' date='Sep 1 2020, 09:37 AM']
Clutch being an on/off switch is kinda normal for big power clutches. It is not a big clutch, actually...its the MC I spec'd out and run in my car. It didn't occur to me that Chris isn't needing a short throw for quick shifting and/or the accompanying pedal effort would be an issue. Changes are in the werks... Exhausts and fresh engines are typically really loud when first started. Mine was also incredibly loud, but was running lean. Also cold starts are always loud. Umm, that engine IS broken in...completely! (IMG:style_emoticons/default/happy11.gif) |
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| Andyrew |
Sep 1 2020, 08:20 AM
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#2950
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California
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[quote name='Cracker' date='Sep 1 2020, 07:02 AM' post='2847633']
[quote name='Andyrew' post='2847625' date='Sep 1 2020, 09:37 AM'] Clutch being an on/off switch is kinda normal for big power clutches. It is not a big clutch, actually...its the MC I spec'd out and run in my car. It didn't occur to me that Chris isn't needing a short throw for quick shifting and/or the accompanying pedal effort would be an issue. Changes are in the werks... Exhausts and fresh engines are typically really loud when first started. Mine was also incredibly loud, but was running lean. Also cold starts are always loud. Umm, that engine IS broken in...completely! (IMG:style_emoticons/default/happy11.gif) [/quote] Ah that's right it was your old race engine.. still it'll tame itself down (IMG:style_emoticons/default/smile.gif) at least in his head (IMG:style_emoticons/default/smile.gif) |
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| preach |
Sep 1 2020, 09:13 AM
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#2951
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Ridge Runner Group: Members Posts: 1,029 Joined: 27-March 10 From: Live Free or Die Member No.: 11,513 Region Association: North East States
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Congrats Chris!
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| Chris H. |
Sep 1 2020, 09:19 AM
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#2952
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Senior Member Group: Members Posts: 4,030 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest
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Congrats Chris! It sounds great. Also nice work on the wiring. If you haven't been through it there is no way to describe how mind-bending it is.
PS don't you wish the Speedhut gauge needles would park themselves at "0" when powered off like stock gauges rather than freezing where they are when you turn the key off? That's my ONLY minor complaint. |
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| tygaboy |
Sep 1 2020, 09:30 AM
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#2953
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914 Guru Group: Members Posts: 5,290 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California
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@Chris914n6 @jd74914 Thanks for the comments. Before we get too far into things, let me say that the ECU is running the tune that it got when it was on the engine dyno with the incorrectly wired IAC connector. See the "first drive" post for details about that. And I doubt there was any time spent even trying to tune off-idle behavior.
I happily confess haven't even connected my laptop to the ECU so I don't know if it's in learn mode or not. In terms of my approach to this: After all the "first time" work I'd done creating that engine harness, fabbing the fuel lines and water lines, etc, I just wanted to prove out that the engine would run and nothing leaked or burst into flames! (IMG:style_emoticons/default/wacko.gif) With that part complete, I couldn't resist the 100 yard "drive"! Now it's on to making it "work". That means focus on the tune. Today I hope to get the software loaded and my laptop connected to the ECU. First thing is to download the currently loaded tune and see what's what. I started this build with hardly any fabrication experience and I'm happy with how my skills progressed and the results I'm getting. Now it's time to do the same with the electrical and software stuff! I'm sure I'll be asking for help so please keep the comments coming. Thanks much! |
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| tygaboy |
Sep 1 2020, 09:45 AM
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#2954
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914 Guru Group: Members Posts: 5,290 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California
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Oh, and now that it does run, many of the "what ifs" have left my head. We all know that nature abhors a vacuum so I suddenly find myself thinking about the hardest decision yet:
Which color do I paint it? I'm a fan of blue and I'm going around on: the car's factory color (Anacona Blue Metallic), something more modern (early 2000s Subaru WRX blue) or something simple like Oslo blue. Then there're things like Aventurine Green from the current Porsche palette. It looks GREAT with gold wheels, but so do any of the aforementioned blues... Decisions, decisions. (IMG:style_emoticons/default/idea.gif) Well, I have a while before I need to decide. |
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| Nogoodwithusernames |
Sep 1 2020, 11:46 AM
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#2955
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Member Group: Members Posts: 236 Joined: 31-May 16 From: Nor-Cal Member No.: 20,051 Region Association: None |
Congratulations on the first drive! That's awesome! (IMG:style_emoticons/default/driving.gif)
Regarding color, one of my personal favorites is gulf theme especially on a GT car. Though I may be biased since that's the combo of my Squareback and 914 colors (blue VW and orange Porsche so combined they must be even better right??) Of course you'll always be driving too fast for anyone to see what color it is anyways so who cares! (IMG:style_emoticons/default/poke.gif) QUOTE(tygaboy @ Sep 1 2020, 08:45 AM) Oh, and now that it does run, many of the "what ifs" have left my head. We all know that nature abhors a vacuum so I suddenly find myself thinking about the hardest decision yet: Which color do I paint it? I'm a fan of blue and I'm going around on: the car's factory color (Anacona Blue Metallic), something more modern (early 2000s Subaru WRX blue) or something simple like Oslo blue. Then there're things like Aventurine Green from the current Porsche palette. It looks GREAT with gold wheels, but so do any of the aforementioned blues... Decisions, decisions. (IMG:style_emoticons/default/idea.gif) Well, I have a while before I need to decide. |
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| andys |
Sep 1 2020, 12:18 PM
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#2956
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None
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QUOTE(Andyrew @ Sep 1 2020, 06:37 AM) Maybe a cam lever for the throttle? Clutch being an on/off switch is kinda normal for big power clutches. Chris, A throttle cam can be profiled to any number of shapes and/or engagement schemes. Slow tip-in helps an awful lot to getting throttles to make initial movement. I did notice an odd appearing linkage angle on your throttle pedal that might be a source of undesired lever ratios. I don't know, but it might be worth a look. My clutch engagement is very much like an on-off switch as well. I played with hydraulic ratios, but it never seemed to make much difference, though I suppose it depends on how far from optimum one might be. Over-travel can damage the pressure plate, so it would be helpful to know the finger travel to dis-engage. I'm using a QuarterMaster 8 1/2" bronze/ceramic disc. It's very abrupt, and takes some choreography to get a smooth launch. Must admit, it is annoying on the street. On my next teardown, I'm going to consider switching over to a KEP clutch setup, and since I'm running a stock LS1, I will opt for a disc that has a Marcel spring to make it street friendly. Congrats on your first drive! Andys |
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| AZBanks |
Sep 1 2020, 02:24 PM
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#2957
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Senior Member Group: Members Posts: 1,062 Joined: 7-December 05 From: New River, AZ Member No.: 5,245 Region Association: Southwest Region
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I like the factory color on your car.
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| preach |
Sep 1 2020, 06:13 PM
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#2958
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Ridge Runner Group: Members Posts: 1,029 Joined: 27-March 10 From: Live Free or Die Member No.: 11,513 Region Association: North East States
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That (IMG:style_emoticons/default/drooley.gif) gold special 930 gold...
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| Cracker |
Sep 2 2020, 05:46 AM
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#2959
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Advanced Member Group: Members Posts: 2,148 Joined: 2-February 10 From: Atlanta (area) Member No.: 11,316 Region Association: South East States
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Liquid Blue (Ford GT). Just a thought...
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.clubcobra.com-11316-1599047205.1.jpg) |
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| 914forme |
Sep 2 2020, 06:03 AM
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#2960
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None
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(IMG:style_emoticons/default/agree.gif) That is the best picture I have seen of that car, camera location and shot perspective is spot on. (IMG:style_emoticons/default/drooley.gif)
Now get sorting, you got this! |
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