OTP Tuning LLC

05/26/2026

05/22/2026

Got some polishing to do on front runner / fuel rails, and pinstriping valve covers white to match outside, in final assembly on this k5 ls swap!

05/15/2026

Big things coming!!

Deposit sent, waiting on build time! Should be ready in about 2-3 months!

And a slight shop expansion while we're at it! 🤣

05/11/2026

Summer coming fast! Don't wait till last minute to get on schedule for some vintage air!

Also get on schedule for any wiring, efi conversions and much more!

05/09/2026

Finally talked this customer into ditching the FITECH and going with HOLLEY, he'll never turn back now!

Don't let anyone talk you into getting fitech or aces or any other cheap aftermarket junk! Go with quality!

05/05/2026

Love a good k10!

5.3/th350 P59 pcm. Always a blast tuning these, however there's always a downfall to using the non electric transmissions with factory pcm. Without a speed sensor there are several tables you lose.

You lose the range sensor, (pcm doesn't know if in park or drive) this can allow the throttle to dip when going from park to drive.

You also lose a speed sensor unless installing an aftermarket one. Losing this can also make throttle dip when coming to a stop because you lose some of the seperate airflow tables (specifically green/blue DBW pcm)

Also a tight converter can make the throttle dip a lot more dramatic.

Recommended if wanting to use a mechanical transmission or older manual to use a p01 (Red/blue) if wanting to keep the factory style pcm.

HOLLEY IS ALWAYS BETTER 😂🤘🏻

05/02/2026

Quick little remote tune for my guy in Kentucky Johnny Martin

Thank you sir for the business as usual!

4.8
TSP CHOPacabra cam 214/222 .550/.550 108 LSA
Brawler porter 243 heads
Longtubes

04/29/2026

80s Malibu rewire, final assembly and tune on the LT/6l90e swap coming soon! 👀

04/24/2026

Got this nice 442 tuned and ready to go!

Previous shop had the shift points way out of wack. Your 4l60e/80e should not be shifting into overdrive at 15mph 😂

During the WOT tuning we found out the stock 25lb injectors were running out up top, swapped in the 50lb flex fuel injector for a broader range!

04/18/2026

Installed a new full body harness from American auto wire, and Dakota digital VHX gauges on this LS swapped suburban!

Nothing like some new wiring to start the summer off!

04/16/2026

Another tune done for Patrick Stewart @ Stewart's Custom and Body !

5.3 / Sloppy stage 2 cam 4l60e