J. Mills Tuning

J. Mills Tuning Automotive Performance & Repair. We do it all. From small repairs, to big repairs. Contact Info: (919)494-2711

You can email us at. [email protected]
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We do Engines, Transmissions, Motor Swaps, Turbo Kits, Fabrication & In House Dyno Tuning.

Stock bottom end LS Vtec. Tuned on Haltech and pump 93.Red dyno graph = stock port cylinder head. Blue dyno graph = Perf...
06/05/2026

Stock bottom end LS Vtec.
Tuned on Haltech and pump 93.

Red dyno graph = stock port cylinder head.

Blue dyno graph = Perfect Circle Engines ported cylinder head.

Im positive that we could have broken 200 whp but this vehicle is not built or meant to be put on "kill". This is a 24 hour endurance racecar. Instead of making peak power we are looking for it to last a long time.

GSR / Flex Fuel Tuned/ Haltech.Low compression piston & rod engine. In the end the fuel system stopped us because it's m...
06/05/2026

GSR / Flex Fuel Tuned/ Haltech.
Low compression piston & rod engine.

In the end the fuel system stopped us because it's maxed out (1000cc's & a factory fuel system).

The red dyno graph is pump 93. The blue dyno graph is 54% ethanol content (what we received out of the pump 🤷).

Some local pump e85... 😬
06/05/2026

Some local pump e85... 😬

1995 Toyota Supra.2jzgte with a t56 transmission swap. Borgwarner s366 turbo.Flex fuel tuned on Haltech. Red graph = pum...
06/02/2026

1995 Toyota Supra.
2jzgte with a t56 transmission swap.
Borgwarner s366 turbo.
Flex fuel tuned on Haltech.

Red graph = pump 93.
Blue graph = 74% ethanol.

06/02/2026

So you know ..

I just returned from getting pump e85 for a customer's vehicle. The round trip to purchase the fuel took me 58 minutes total.

An hour of my time at work cost $140. The ethanol cost me $33.98.

$173.98 for 10 gallons of e85 is ridiculous. I think you guys should plan ahead and bring your own ethanol 🤷

Dyno comparison.Stock 2jzgte intake manifold and throttle body VS a Plasmaman intake manifold and throttle body (Toyota ...
06/02/2026

Dyno comparison.

Stock 2jzgte intake manifold and throttle body VS a Plasmaman intake manifold and throttle body (Toyota Supra).

Both pulls were done on 24 psi using a Borgwarner s366 turbocharger and pump 93.

Red = Stock intake.
Blue = Plasmaman intake.

Personally I wouldn't mind the loss of power and torque down low to gain that much up top.

We have a B series transmission in for diagnostic & repair. If your manual transmission in your Honda or Acura needs rep...
05/29/2026

We have a B series transmission in for diagnostic & repair. If your manual transmission in your Honda or Acura needs repair, let us know. We can help.

www.millstuning.com

J Series swapped Mazda Miata. Tuned on Haltech. J35a4 engine. Stock Miata transmission.We cut the tuning short due to a ...
05/28/2026

J Series swapped Mazda Miata. Tuned on Haltech.
J35a4 engine. Stock Miata transmission.

We cut the tuning short due to a battery voltage issue and high fuel injector duty cycle. Nonetheless it still did great.

I mentioned using a Haynes Repair Manual to a customer the other day. They never heard of such. There is a whole generat...
05/27/2026

I mentioned using a Haynes Repair Manual to a customer the other day. They never heard of such. There is a whole generation of car enthusiasts out there that know nothing about these books.

2001 Honda Accord. F23a engine. Red dyno graphs = Stock engine computer. Blue dyno graphs = Chipped ECU tuned on HTS.Not...
05/27/2026

2001 Honda Accord. F23a engine.

Red dyno graphs = Stock engine computer.
Blue dyno graphs = Chipped ECU tuned on HTS.

Not huge gains over the factory ECU 🤷

Address

22 Eric Medlin Road
Franklinton, NC
27525

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+19194942711

Website

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