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  #941  
Old 09-27-2019, 03:55 PM
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Little update on the EFI project.

I've now had the car running for about 3 months and I've put 525 miles on it including a SCCA Autocross event 2 weeks ago. I've uploaded about 17 or so new tunes to the ECU and I'm fairly certain this last one is close to as good as it is going to get. I'm SUPER happy with the found mid range power that came with it. I just filled the tank and figured 13.06 MPG on a tank that not only included many WOT Highway On Ramp blasts while tuning but also 4 long Autocross runs and very little highway cruising time. On the way to get gas today, I made several 1st gear launches and hard pulls with less than 4 gallons in the tank and still ZERO fuel starve issues. I'm a very happy camper so far, so happy I made the swap to EFI.

Here's a picture of Barney doing Street Car things...



And here are a couple of pulls I made on the way home. Sorry about the shaky cell phone video but it's all I had...



I made some more adjustments to the rear suspension, lowered the ride height and stiffened the sway bar. Hope to get a chance to test some slalom moves out in a parking lot somewhere before our next race Oct 13 but if not, I'll dial it in more then. I think I'm moving the right direction though. I KNOW forward grip is better with this setup than with the 600# rear springs.
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  #942  
Old 10-03-2019, 12:52 PM
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Did some Hard Parking last night...

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  #943  
Old 10-14-2019, 12:53 PM
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AZ Region SCCA Solo put on an awesome event yesterday with one of the best courses I've run on in a while. A Nationals quality course 30 minutes from home, that's hard to beat. I was a bit apprehensive walking the course as it was mostly large sweepers and straights and I've been tweaking my rear suspension setup for slaloms, not sweepers. Thankfully though the changes were good and the car handled pretty well...well enough in fact to finish 13th in Pax out of 130 drivers and 18th in raw time. Given the caliber of drivers and cars in this Region, I'm very happy with that. The latest tune in the Holley EFI really woke it up in the mid range and I can say now with certainty it makes more power everywhere than the carb and dual plane intake setup ever did. I also ran the fuel tank down to about a 1/4 tank and never once did it starve for fuel, Carl Cassonova's Vaporworx setup just plain worx!

We even had a little fun in the Time Only runs swapping keys, I handed Barney's keys over to Mathew for a run while I scooted the M-T Pockets Monte around the course in exchange. Mat and Ray really have that car running faster now, I need to start watching my back as they are coming for me. Tommy still has us covered though as he finished 6th overall in Pax in his Camaro.

Here's a clip of my fastest run, check out the top speed in the straight across the middle of the course!! We race again with SCCA Nov 3rd at AMP and then Nov 15-17 at Good Guys in Scottsdale. Let me know if you want to come watch and possibly go for a ride along.



Here are the top 30 finishers sorted by PAX just to give you an idea of the cars and drivers we ran with yesterday.

Category Driver Car Best Raw Time Pax Time
SPM Brian Peters 2017 Chevrolet Camaro 1LE 45.428 36.706
SPM Doug Rowse 2017 Chevrolet Corvette 45.214 36.940
SPM Dave Schotz 2020 Toyota Supra 46.088 37.239
SPM Steve Eymann 2016 Chevrolet Corvette Z06 46.572 38.049
Open Tommy Tommerdal Chevrolet Camaro 47.280 38.155
SPM Jason Bucki Camaro 47.489 38.371
SPM Ron Bistrais 2007 Ford Shelby GT 47.073 38.412
SPM Elliot Speidell 1995 BMW 325is 45.221 38.574
SPM Dennis Riehle 1970 Chevrolet Camaro 46.646 38.623
SPM Kenneth Mitchell 1989 Chevrolet Corvette 47.038 39.089
Open Cameron Schotz Toyota Supra 48.393 39.102
Open Lance Hamilton 1985 Chevrolet Monte Carlo SS 48.454 39.102
Open Josh Johnston 2006 Mini Cooper JCW 49.286 39.133
Open Sean Dickinson 2010 Chevrolet Corvette 48.346 39.354
SPM Scot Spiewak 2007 Chevrolet Corvette Z06 47.617 39.570
Open James Frink 2014 Subaru BRZ 49.932 39.646
Open Scott Urich 2015 Volkswagen Grand Tourer Injection 50.606 39.776
Open Dave Young 2017 BMW M2 49.229 39.777
Open Chris Groppi 2013 Subaru BRZ 49.356 40.126
Open Matthew Edwards 2014 Ford Mustang 50.549 40.288
Open Doug Osborne 2015 Volkswagen Golf R 49.063 40.428
Open Martin Lippincott 2000 Mazda Miata 51.414 40.463
Open Kim Kemper 2016 Porsche GT3RS 47.544 40.507
Open ChrisSteele 2012 Mini Cooper S 51.079 40.557
Open Mathew Leon 1978 Chevrolet Monte Carlo 50.325 40.612
Open TimBergstrom 1993 Mazda Miata 47.418 40.637
Ladies Kathi Van Der Werf 2018 Porsche Cayman GTS 49.988 40.840
Open Todd Anderson 2016 Scion FRS 50.698 40.863
Open Harry Berzes 2016 Mazda MX5 GT 50.881 40.959
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  #944  
Old 10-14-2019, 04:50 PM
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Awesome Lance! So when you mentioned Nov. 3 at AMP, your not referring to Atlanta Motorsports Park, you’re referring to Arizona Motorsports Park, correct?
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Old 10-14-2019, 06:12 PM
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Correct...
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  #946  
Old 10-15-2019, 10:45 AM
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Enjoyed that run Lance!
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  #947  
Old 10-18-2019, 09:54 AM
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This shot shows how hard the car is digging a bit better I think...

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Last edited by SSLance; 10-18-2019 at 09:57 AM.
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  #948  
Old 11-01-2019, 12:31 PM
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More tuning on the Holley. Found and corrected several issues which created the touchy throttle and have it MUCH better now. Super easy to be very smooth on throttle now. Also added some enrichment on MAP rate of change which it didn't have before, helped tremendously with tip in power. Can't wait to race it again Sunday.

Video for attention...



Had a pretty scary hung throttle while testing yesterday. Had a green light with no traffic in front so made a pretty hard hit in first and second gear, then the throttle hung wide open going to third. Pedal was on the floor so I immediately hit the key to switch it off. After I caught my breath while still coasting, I started it again with same result. Once stopped I pulled air cleaner but didn't see the culprit, fiddled with throttle cable and all seemed good so I started it again and it was fine. Once I got it back home, I discovered this...



The screws holding the throttle position sensor had come loose, one completely gone and the other finally loose enough that the shaft jumped the slot in the sensor and the sensor held the throttle open. Yes, the replacement screws got a dose of loc-tite upon reinstall and yes, throttle application is much smoother now.

I was running a datalog during the hung throttle...finally got up the nerve to look at it.

The green line is RPM... At least I know my rev limiter works now...

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Old 11-01-2019, 01:55 PM
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Wow..... Scary indeed.
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  #950  
Old 11-04-2019, 08:32 PM
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Spent the day yesterday throwing Barney around another AZ Region SCCA Solo autocross course testing the recent changes made to correct the touchy throttle issue and I can report it is MUCH better...almost Quadrajet smooth once again. Thanks to all of those that helped diagnose and tweak the oddities that created the issue. The car ran great, rear end stayed under it for the most part and the engine made fantastic power everywhere.

Now if only the driver could do his part... The course was tough, it required patience, something I don't have much of as you'll see in the video. The real strange thing though was I ran a 54.541 on my 3rd run...AND my 4th run...using two completely different strategies... Both runs are in the attached video.

Now off to SEMA for a couple days... See a bunch of you there...

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