SUPERCHARGED NC Racer Project!

Miata Parts, Intakes, Superchargers, Headers, Exhausts, Shocks, Springs, Sway Bars, Brake Kits, Autocross and track mods.

Re: SEMA SHOW....NC COSWORTH SUPERCHARGER COMPLETE!

Postby trickytrev » Wed Aug 02, 2017 3:41 pm

Brian just wondering how those big throttle bodies coming along if at all
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Re: SEMA SHOW....NC COSWORTH SUPERCHARGER COMPLETE!

Postby Brian » Wed Aug 02, 2017 4:59 pm

trickytrev wrote:Brian just wondering how those big throttle bodies coming along if at all


We had a problem with the car that took a lot of time to chase down. Got the car working right again and will get back to the TB testing.
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Re: SEMA SHOW....NC COSWORTH SUPERCHARGER COMPLETE!

Postby Brian » Mon Nov 20, 2017 6:51 am

Autocrossed our Supercharged 07 Yesterday, this great project can still WIN.
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Re: SEMA SHOW....NC COSWORTH SUPERCHARGER COMPLETE!

Postby Brian » Mon Dec 04, 2017 7:31 pm

Proof of life for this project of many years, two SCCA events in a row, two wins!



One video looking back...prior event.


One video looking forward...event yesterday.
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Re: SEMA SHOW....NC COSWORTH SUPERCHARGER COMPLETE!

Postby Brian » Sun Dec 17, 2017 5:39 pm

END OF DAY/SEASON UPDATE...Season came down to the LAST event, which is exciting enough, but after all competitors completed 2nd runs we were down 1.5 seconds on the day and about 1 second for the season! We closed the gap with 3rd runs but both this last event and the season came down to the LAST RUN of the season. This great old NC project ended up on top by a few tenths with the very last run of the year...thanks to our SCCA buddies for the fun!
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Re: SUPERCHARGED NC Racer Project!

Postby Brian » Mon Feb 26, 2018 11:00 am

Update on World's Oldest Supercharged NC.

Part of our secret sauce to the result over 300 hp with just 2.7 pulley was an HKS ignition booster that got us a good 15hp. We put that on the car and took it off during several dyno days...and it added a good 15 or more hp every time. And....it finally died, and that item is long out of production. So, we started over, testing some Holley LS coils, didn't get much today...went from best of 305 on stock coils up to 310 hp. More work to do. Also hope this setup solves issue we have at track days when this car gets hot.

Nonetheless thrilled that this old girl still can lay down the big numbers....this was a unicorn full race build, not a typical 2.0 with effective compression of just 9 to 1, we are over 11 to 1 with this motor and every trick in the book that Cosworth could add at the time including billet crank, forged rods and pistons, ported and flowed big valve head, race bearings, on and on. Duty cycle was intended to be 25 hours of racing and then pull for fresh rings and we have NEVER done it because it keeps making good power, been in the car 10 years now.....best race motor I have ever had.
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Re: SUPERCHARGED NC Racer Project!

Postby Brian » Fri Sep 14, 2018 6:19 am

This project at LAGUNA for MRLS event!

Time to see if the prototype ignition has cured our issues with this car here. In the past it runs fine cold here but once hot the stock ignition would cut out, seems we were boiling both the coils and the ECU. So we are here with new ignition setup and ducted fan on the ecu (and heatsinks on the ECU case) to see if we can run it hard all weekend.
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Re: SUPERCHARGED NC Racer Project!

Postby DanielS172 » Sat Sep 15, 2018 8:59 am

Brian,

You mentioned that your ECU has a cooling duct. I noticed during the install of my Koyo rad that the battery and ECU have what appear to be air ducts, but they don't fit well with the Koyo rad. Are these necessary for a mostly stock car?
2006 with NC3 front end | OEM hardtop | full header/exhaust | FM stage II suspension and Wilwood LBBK | Blackbird Fabworx GT3 roll bar | TRMotorsports FF10s.
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Re: SUPERCHARGED NC Racer Project!

Postby Brian » Sun Sep 16, 2018 5:18 am

It's only proven to be an issue with boosted raced cars like ours. Nonetheless, doesn't ever hurt to cool electronics.
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Re: SUPERCHARGED NC Racer Project!

Postby Brian » Sun Sep 16, 2018 5:18 am

Starting last day of the all Miata Laguna event, thanks to customers who stopped by our more humble display this year, it's been a great weekend so far. There was a ton of NC love for us at the event since we made the choice to bring just 1 car this year instead of the usual 4, and we made that 1 car an NC. Thanks to all the NC owners who came to say hello and check out this classic project NC of ours.

Happy to report our Supercharged Silver 07 had a great first day, gave rides to lots of customers and some members of the Press. Didn't bother bringing out the aero bits we have for this car (like double element rear wing we have for it) and it still cruised as quick as 1:37 with passenger on two year old tires, most laps in the 1:40 to 1:44 range depending on traffic....there was a ton of traffic in the B group, much more wide open in A.

It has been a few years since I pushed this car here and it took me three sessions to get back in sync with the feel of it but by end of day was having a great time driving it track edge to track edge. The only real issue first day was tire rub, could have used some spacers in the rear to keep the 38mm 17x10 setup from rubbing inside at the corkscrew and needed tall bumpstops all around which we typically install for Laguna and just didn't have time before the event to get that done. Ryan Passey keeps some packers in our general track box that have a cutout so they can snap onto the shock rods and I did add two per side at the front after first sessions and that helped the rub a lot but the rub still had me taking a more conservative line at turn 6 and the Corkscrew to reduce the rub.

Testing potential new NC ignition setup and so far that is working great. Customers with boost and north of 250 hp have reported they are at the limit of stock ignition system and it has been an issue on this project car for many years with me roasting the stock coils every few thousand miles in track use. On the car currently is essentially a Corvette coil and wire setup, perhaps take it all the way to finished product if it continues to perform well.
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