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  1. JMcDonough

    Official Pay it Forward thread :)

    Few parts that are free to a good home: - Autometer Phantom fuel gauge AutoMeter Phantom 2-1/16" Fuel Gauge PN 5714 0 ohms empty, 90 Ohms full. Compatible with many GM Vehicles. Working when removed last year. Bench tested and still functions as expected. Prior owner drilled a small additional...
  2. JMcDonough

    SBC or LS1 and Average Cost of LS Swap?

    From the hotrod article (car weight is listed in each engine's section): LS7: 3,420, LS3: 3,334, LS327 (iron block): 3,386, ZZ4: 3,360, ZZ383: 3,360, ZZ427: 3,520, ZZ572: 3,560 LSX454: 3,448 From some forum posts about the article, there's speculation that the LS7's dry sump system (tank, extra...
  3. JMcDonough

    SBC or LS1 and Average Cost of LS Swap?

    Complexity and how much the weight difference matters is somewhat subjective. Again, I advocate adding it all up (parts needed and costs). I did that with a BMW I intended to LS swap, planned and added up all the parts, collected about half, then decided against the swap when the competitive...
  4. JMcDonough

    SBC or LS1 and Average Cost of LS Swap?

    Good thread. Lots of good input and I've enjoyed reading all the responses. A few suggestions and some additional perspective: To get an accurate answer on the cost for either option, you really have to do the research to find all the parts/pieces, add it up, and add a bit more for unexpected...
  5. JMcDonough

    24x sbc crank trigger conversions

    See the link on the first page/post. Exists, just kinda pricey.
  6. JMcDonough

    24x sbc crank trigger conversions

    John's post in Paul's CP build thread reminded me of this and I wanted to post an update now that I'm running MS2 port EFI w/ 8 coil wasted spark on a gen1 SBC. Cliff notes version: Works great. Still more tuning to do, need to figure out a good tach output, but no real surprises during initial...
  7. JMcDonough

    Be prepared, C-Prepared Autocross (1981 Camaro)

    I’m running an MS2 with crank trigger wheel on a gen1 sbc. V-belt pulley system, DIY autotune trigger wheel (should have found one with proper SBC bolt holes). Some of the aluminum crank pulleys have enough material on the back that they could be milled down the thickness of the trigger wheel...
  8. JMcDonough

    C6 Z06 wheels

    I bought two sets of used OEM polished (not chrome) C6 Z06 wheels in 2018/2019. One set was in pretty rough cosmetic shape for $320. Other set came with junk tire but were nice for fitment. They are much nicer (still not flawless) and set me back $600. Initially I wanted to use C6 Grandsport...
  9. JMcDonough

    C6 Z06 wheels

    https://nastyz28.com/threads/post-up-your-big-wheeled-cars-aka-17s-or-larger-and-add-your-backspacing-info.147147/page-83#post-3754309 Brake rotor flange to flange width in the rear is ~62.5" +/- 0.2" to fit the 19x12's without a spacer. Before cutting off the front suspension, I did...
  10. JMcDonough

    Detroit Speed weld in subframe connectors

    Another + 1 the solid subframe bushings and aligning everything prior to bolting or welding to the subframe. I'd also recommend modifying the subframe connectors to bolt to the front subframe instead of welding. Ability to remove the front subframe is very convenient and the rigidity sacrificed...
  11. JMcDonough

    Master Cylinder and Booster Advice

    I don't recall modifying anything for clearance. I did use it in combination with their hydraulic clutch m/c bracket. The DSE brackets spaced the booster the right distance so the rod connects to the pedal without issue (right diameter to fit stock pedal, used stock stud and clip). Pics...
  12. JMcDonough

    Master Cylinder and Booster Advice

    I pieced together a DSE style setup using their bracket, 09-13 C6 m/c and booster. AES corvette parts in Michigan is a good source for used parts. I went new on the booster since rock auto had them for not much over used. I have C6 base brakes up front and stock 2012 Mustang discs (Ford 8.8) in...
  13. JMcDonough

    Autocross / SCCA Solo 201 - How to Improve

    Good point - Andy Hollis has a nice top 10 mistakes: https://forum.miata.net/vb/showthread.php?t=44932 To your point, #s 9 and 10 from the above link:
  14. JMcDonough

    24x sbc crank trigger conversions

    I plan to sandwich the trigger wheel between the crank pulley and the damper, as shown in the msextra forum post above. Using the DIYAutotune 3 wire hall. Will make a custom bracket to mount the hall sensor and yes - shimming of the other accessories/pulleys will be required. I'm only running...
  15. JMcDonough

    24x sbc crank trigger conversions

    I found some sequential w/ 24x discussion on the msextra forums during a recent search on sbc trigger setups: https://www.msextra.com/forums/viewtopic.php?f=131&t=40358 The most experience folks (Matt Cramer, James) recommended using a 60-2 or 36-1. The vortec distributor for cam sensing...
  16. JMcDonough

    Autocross / SCCA Solo 201 - How to Improve

    Hi Mike, Thanks - looking forward to crossing paths and talking 2nd gens at more events in the future. That was both the car's and my debut in CAM-T. Did you run into issues on Day 2? We made it through all the runs, but not without a number of learnings - some of which are relevant for this...
  17. JMcDonough

    Autocross / SCCA Solo 201 - How to Improve

    Another 201 topic - PAX/RTP aka Index, and while we're at it, PSI (ProSolo Index) You can find the official PAX #s here: http://solotime.info/pax/index.html There's a whole history around this set of number, how it came to be, how it evolved over time, etc. I won't go into all the detail, but...
  18. JMcDonough

    Autocross / SCCA Solo 201 - How to Improve

    If you have never autocrossed before, see the Autocross 101 thread. So you've done this a few times, maybe a season or two and you want to get "better", whether its the driver, car, or both. Autocross 201: What matters the most, in order: - Driver performance - Tires - Car (dimensions...
  19. JMcDonough

    Autocross / SCCA Solo 101 - Where to Start

    There's been some recent chatter on the suspension forum section and elsewhere here about autocross, however I didn't see a good primer thread so - that's the goal with this one. Initial plan is to make 201/301/401 threads/posts as well, so folks who've tried it and want to improve have a place...




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