FSi Racing & Tuning

FSi Racing & Tuning We are a high performance shop specializing in GM vehicles primarily LS & LT platforms. We offer many services from cam swaps to full engine builds.

We offer custom EFI tuning. All build are tuned in house on our Dynojet Dyno. FSi Racing is a premier performance mechanic business based in Claypool, IN, serving the surrounding areas since 2020. Specializing in top-of-the-line mechanic services and a wide array of racing car parts, FSi Racing is your go-to destination for all things automotive. Our expert team offers camshaft installation, tunin

g, and performance engine installation, as well as custom fabrication and performance maintenance to ensure your vehicle performs at its best. Trust FSi Racing for all your racing and automotive needs. Services:
Performance Mechanic
Performance Maintenance
Custom Fabrication
Turbo Kit Installation
Camshaft Installation
Supercharger Installations
Turbocharger Installations
Tuning
Custom Tuning
Fuel Injector Installation
Dyno Tuning
Wiring Service
Performance Wiring Service
LS Engine Building
LT Engine Building
DOD Delete
LS Engine Repair
LT Engine Repair
Torque Converter Installation
Corvette Repairs

Specialties:
Camshaft Installations
Tuning and Performance Engine Installation

Products:
Camshafts
Superchargers
Turbochargers
Intakes
Engines
Exhaust Systems
Headers
Cylinder Heads
Transmissions
Performance Transmissions
Performance Engines
LS Engines
LT Engines
Fuel Injectors
Clutches

Brands:
Brian Tooley Racing
Texas Speed
Holley
HP Tuners

05/15/2026

Marks ZL1 picked up 85whp after having the Edelbrock 2650 ported by Kong Performance and a lid spacer from Weapon-X on the same pulley combo.

05/14/2026

We had the opportunity to tune Kegans beautifully restored LS swapped 1949 Willys truck!

Stock 5.3 with a Truck Norris cam

We had Jamie’s new to him square body Chevy in to make a few improvements on it.It came to us with a Holley sniper on th...
05/13/2026

We had Jamie’s new to him square body Chevy in to make a few improvements on it.

It came to us with a Holley sniper on the LS for some reason (we think that was their solution to make the 700r4 tv cable work 🤷🏻‍♂️) so we ditched that and swapped on a Holley high ram fitted with some Fuel Injector Clinic injectors and a Holley Terminator X Max to control it.

Why an X Max? Because that 700r4 had to go!
So we swapped in a freshly rebuilt 4l60e with a conversion kit to run the original transfer case.

We tied it all together with a Circle D Specialties torque converter!

We cleaned up the wiring fixed some fuel system issues, overall just making this a way more drivable and enjoyable truck!

04/30/2026
One company we don’t thank enough is manton_pushrods anytime we need custom pushrods!Here’s one of the new gnarly pushro...
04/22/2026

One company we don’t thank enough is manton_pushrods anytime we need custom pushrods!

Here’s one of the new gnarly pushrods for the War Mullet

1/2 inch .188 wall with a tool steel tip on the rocker side!

04/18/2026

Trent took the restrictor plate off the Red Dragon, and let it scream to 7500rpm!

It went from 415 to 480 with a new BTR cam and some Promaxx heads!

04/18/2026

Agust’s truck is chopping now with the Texas Speed & Performance L83 BFD cam!

04/16/2026

Why build a 624whp avalanche, because we can!

6.2 swapped with an LSA blower on e85





04/01/2026

Just letting this sbe LS1 sing to 7k+ rpm

Made a very healthy 437whp!

03/28/2026

Baseline pull on this beautiful blue Z06!

Was not very impressed by the tune this car showed up with.

This pullied z06 actually made less power than a stock z06 😢

Cam, headers and a Nubtune will get this thing right!

Address

669 W 600 S
Claypool, IN
46510

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 12am - 12am

Telephone

+15745270851

Website

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