Jekyll & Hyde Performance

Jekyll & Hyde Performance Custom stand alone and stock ECU calibration. Specializing in late model GM, Ford, Mopar applications. Bolt ons to complete builds offered.
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Operating as usual

03/01/2021

Pullied down this 2017 Roush equipped Mustang and added a JMS boost pump. Car made a solid 688rwhp. Brought the 2 step down a tad and should be ready for the track next weekend.

02/10/2021

Check out this Japanese spec right hand drive 1990 180SX kicking out 313/[email protected] psi.

02/10/2021

2005 CTS V with a CAI baseline was 338/349 and ended up with 364/368.

C7 corvette with P1SC came in for some upgrades previously making 614rwhp STD. We added LT4 HPFP, LT4 injectors, DSX aux...
02/08/2021

C7 corvette with P1SC came in for some upgrades previously making 614rwhp STD. We added LT4 HPFP, LT4 injectors, DSX aux pump, DSX flex kit. On our preliminary 93 runs we gained tons of power but 5k+ we seem to be are reaching limitations on the valvetrain and having major valve float. Set back for sure but we will get it sorted and back on the rollers hopefully in a few weeks.

Sometimes you have to step outside for some fresh air 😁. 76mm turbo on a 6.0 built for boost with 4L80 going in a 1950 F...
02/04/2021

Sometimes you have to step outside for some fresh air 😁. 76mm turbo on a 6.0 built for boost with 4L80 going in a 1950 Ford pickup. πŸ’ͺ. Been hard to keep this one a secret. Can't wait to get her on the rollers hopefully next month.

02/03/2021

Just a little sneak peak 😜...Darius' 01 Cobra twin 62/62, stroked Neverenuff Performance Teksid block, 6R80 swap with quick 6 trans controller, 9 inch, On3 kit, circle D converter, ID2000s on a MS3 Pro stand alone... This was a 93 pull.stay tuned E coming soon we just getting started πŸ’ͺ

02/03/2021

2014 Sierra we did last year equipped with new 416 stroker, cam, 3600 stall, and long tube headers making 483/465 through 35 inch mud tires. Dyno sheet in comments.

01/30/2021

04 GTO with built motor and LSA swap making 618/[email protected]

Mods are:
383 forged bottom end
Cnc ported 799 heads
Stock LSA blower 2.4" upper, 7.5" lower
Custom blower cam
FMS 850CC [email protected] IDC @7k
Headers and full exhaust
T56 magnum with monster clutch

01/30/2021

99 C5 putting down 374/398 with newly installed Texas Speed & Performance 228R cam kit, headers and X pipe.

01/28/2021

1st startup going good for first revision on the C5 we just installed Texas Speed & Performance camshaft, dual springs, long tube headers with mid pipe. Also Installed new radiator, water pump, crank pulley, and a few other items.

01/27/2021

2015 C7Z M7 equipped with 2 inch headers making a solid 618/652.

01/26/2021

For sale 2006 TB SS all fresh and ready to go.
Just finished custom engine and trans calibration. Build pics in comments. Truck runs very strong. Build details:

Fresh LS2 with upgraded baffle system and pickup in pan (known issue for these)
226/238 .600/.600 113 LSA
Custom exhaust with pacesetter headers, off road mid pipe and magna flow muffler
E fans work with tune
Brand new 4L70 built by Robert Godfrey with Phoenix 2600 stall
B&M trans cooler

$13k OBO it's been rainy so it's dirty I'll toss you $25 for a wash credit πŸ˜‰.

C5 getting the works along with some maintenance. Texas Speed & Performance camshaft, long tube headers, X pipe, and LS6...
01/20/2021

C5 getting the works along with some maintenance. Texas Speed & Performance camshaft, long tube headers, X pipe, and LS6 intake manifold. Also installing a new water pump and crank balancer. Stay tuned for the results.

01/19/2021

2006 Silverado SS heads, cam, and headers making a stout 388/409
Baseline pull with no tune it put down 333.

01/15/2021

2013 ZL1 cracking into the 500hp club with 508/472.

01/15/2021

2017 Roush Mustang Phase 2 6R80 making 610 rwhp
Came in on stock roush tune making 550 rwhp. Gained a ton across the power band coming to 10% overall. We also put in our custom trans calibration. Should be a whole new animal.

01/11/2021

2017 Camaro SS Manual with CAI, Headers, and Flex. Made 417/432 SAE no tuning and came out to 440/456 on 93 and 454/475 on the E60 SAE. STD numbers are 470/492.

01/08/2021

2010 Camaro SS came to us from a Dallas shop and was pretty bad off. We fixed all the issues and it paid off. TSP F35 Cam, TSP headers, 102, and borla exhaust. 524/489. Dyno Sheet in comments.

01/04/2021
New Lift

New lift has power😁 Stratus Auto Equipment

01/01/2021

New dynocom setup first run with the 2017 Roush. On the dyno jet it showed 594/504 SAE and we got 597/528 SAE on the Dynocom. Still working through some "kinks" but hopefully this new setup will work out.

Dyno progress. Made the power wire for the brake and got the pit cover on. Just need to drill and anchor the tie down po...
12/24/2020

Dyno progress. Made the power wire for the brake and got the pit cover on. Just need to drill and anchor the tie down points and should be ready to do some test pulls. Dynocom Industries

12/23/2020

Stock 2014 Challenger 5.7 auto making 349/387 SAE 363/402 STD. Before numbers were 330/365.

12/22/2020

2004 GTO swapped from auto to magnum T56 setup/Monster Clutch Co. Twin disc and added a Texas Speed & Performance bald eagle blower cam and prc stg 2.5 243s. New power is up to 416/383 SAE 434/398 STD from 325/340 with the auto. That's a great gain! Blower will be coming next😁

Looks like one of our customers is going to have an early Xmas πŸ’πŸŽ Texas Speed & Performance
12/20/2020

Looks like one of our customers is going to have an early Xmas πŸ’πŸŽ Texas Speed & Performance

12/19/2020

C6 Grandsport with stage 1 TSP cam and Circle D Specialties triple disc converter making 433/419 SAE 450/435 STD

It's time! Dynocom Industries  DC 15000 will be arriving today. πŸ’ͺ 2400+ hp capable and 240+mph. Let the fun begin.
12/17/2020

It's time! Dynocom Industries DC 15000 will be arriving today. πŸ’ͺ 2400+ hp capable and 240+mph. Let the fun begin.

12/17/2020

Every vehicle that we tune is not only put on the dyno but also thoroughly street tuned. This is to ensure it is ready to go when you're ready to unleash the beast.

Circle D Specialties  triple disc going into cammed C6 that we knocked out last year. Every new customer is amazing but ...
12/13/2020

Circle D Specialties triple disc going into cammed C6 that we knocked out last year. Every new customer is amazing but really love seeing return customers. Will be getting our custom trans calibration after install.

Save for what you'll NEED later and don't SETTLE for what you want now. We strive on our integrity towards you as a cust...
12/01/2020

Save for what you'll NEED later and don't SETTLE for what you want now. We strive on our integrity towards you as a customer and will always give you the correct build recommendations without cutting corners. If it takes you a little longer to come through that door then we are willing to wait. Let's make some fast vehicles!

Got some stuff done on my 41 today. Steel core gaskets with studs made it so much easier and spreaders to help with leak...
11/30/2020

Got some stuff done on my 41 today. Steel core gaskets with studs made it so much easier and spreaders to help with leaks. Pulled headers off coated in primer and got one coat of black so far. Changed plugs to rapid fire 5s. Took about four cans of brake cleaner to the bottom of oil pan, trans pan and block to clean up the leaks from old valve cover gaskets that I guess got pinched. Also removed battery tray from firewall and relocating to trunk. Little stuff but progress for sure.

Now's the perfect time to get your Monster Clutch Co.  Setups! PM for ordering. We also have other black Friday sales go...
11/26/2020

Now's the perfect time to get your Monster Clutch Co. Setups! PM for ordering. We also have other black Friday sales going on like TSP cam kits.

11/25/2020

2006 Silverado 2500HD making 327/333 SAE 340/343 STD 2nd gear pull due to stock driveshaft.

Cammed 6.0 crate motor 9:8:1 compression
60lb injectors
4L80 with 2k stall
4.10 gears
Cold air intake

πŸŽοΈπŸ’¨
11/21/2020

πŸŽοΈπŸ’¨

11/20/2020

2013 ZL1 making 588/591SAE 611/614 STD @10lbs.

Clean 2013 ZL1 with only 21k miles going on the rollers.93 oct Manual transCamHeadersExhaustInjectorsCAI
11/19/2020

Clean 2013 ZL1 with only 21k miles going on the rollers.
93 oct Manual trans
Cam
Headers
Exhaust
Injectors
CAI

Address

Buffallo Gap Rd
Abilene, TX
79606

Opening Hours

Monday 09:00 - 18:00
Tuesday 09:00 - 18:00
Wednesday 09:00 - 18:00
Thursday 09:00 - 18:00
Friday 09:00 - 18:00
Saturday 15:00 - 18:00

Telephone

(210) 381-8515

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Comments

I'm excited to get "Orange Crush" tuned and breathing better here soon. πŸ˜€
Thanks again !
Thanks again
Allow me to introduce "Mr. Hyde", my 2005 GTO. LSA install going in this winter.
I love the need for speed