mod your logitech g27 - ARC_Team

HOW TO MOD YOUR LOGITECH G27 

STEP-BY-STEP DIRECTIONS 

VERSION FOR EVALUATION ONLY 

Hi there! First of all, let’s introduce Daniel our electronic engineer. He’ll show you the 

whole procedure to boost up your G27 in 76 steps. 

The kit you’ve just received includes all these parts: 

1 x XXX xxxxxxx xxxxxxx 

1 x XXX power supply (mains plug may differ depending on country) 

1 x Fuse holder (5x20) 

1 x X Ampere fuse 

2 x Electric fans w/grid 

2 x XW resistors (XXX+XXX ohm or XXX+XXX ohm) 

2 x XXXXW XXXX ohm (XXX) resistors 

2 x XXXXW XXXX ohm (XXX) resistors 

1 x XXXX XXX electrolytic capacitor 

1 x miniature lever switch 

1 x red/black cable with reduced section end and male/female connections 

1 x red/black cable with male/female connections only 

1 x 2.7 inch black cable 

1 x holed small circuit board 

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Tel. +39 382 528079 | Fax +39 382 520167 | Internet: http://www.f1driving.it | E-mail: info@f1driving.it

Tools needed for getting the job done right: 

1. Soldering station with small tip (sharp pointed is preferred) 

2. Battery operated drill (with some bits) 

3. Battery operated screwdriver (you might use the drill for both) 

4. Hot glue gun 

5. Tin solder wire 

6. Pair of electrician’s scissors 

7. Regular mill bastard file 

8. Diagonal nippers 

9. Electronics pliers 

10. Phillips screwdriver 

11. Flat screwdriver 

12. Solder sucker 

13. Insulating tape 




Step #1 

Remove the six front wheel screws by 

a 4mm Allen key or the battery 

screwdriver (better and faster) with 

the appropriate bit. 

Step #2 

Remove the two screws on the gear 

switch board using the Phillips 

screwdriver. 

Take care to not pull off the wires which 

are connected to the wheel. 

Step #3 

Disconnect the board connector 

using the pliers or by hand. 

DON’T DISCONNECT PULLING 

THE WIRES! 

Now you can put aside the 

steering wheel. 

Let’s getting started! 




Step #4 

Remove the three screws which 

hold the gear shifter using the 

Phillips screwdriver or by the 

battery screwdriver (better and 

faster) with the appropriate Phillips 

bit. 

Step #5 

Just pull the gear shifter and remove it 

carefully taking care to not pull off the 

white connector. 

Step #6 

Turn the G27 upside down 

and remove the eight 

screws with the Phillips 

screwdriver, in picture are 

shown the screws position. 




Step #7 

Remove the top cover, then 

with a thin permanent 

marker draw on it the 

perimeters of the two square 

holes for the fans applying 

the sizes in picture. 

Step #8 

Pick up the battery drill and with a 13/64” 

(5mm) bit make a series of holes close to 

each other as much as you can all along the 

drawn perimeter keeping the holes inside 

the lines. 

Step #9 

At job done you should get a 

situation similar to this picture, now 

using the drill again with the same 

bit, break the links between the 

holes by tilting the drill back and 

forth in the holes. 




Step #10 

Now pick up the bastard file and 

make a filing job all around the 

square holes making them 

smooth and straight taking care 

to not go further the line bounds. 

Step #11 

Once having gotten the squares smooth 

try to insert the fans in. 

If you have correctly carried out the 

previous steps they won’t fit and that’s 

right, now use the file slightly till they fit 

in the holes as just they don’t fall 

through. The picture gives you an idea of 

how you should get the job. 

Step #12 

Remove the fans and turn the cover on 

its inner side, using the battery drill with 

a 17/64” (6.5mm) bit (up to 23/64” 

recommended) make a hole in the 

position shown in picture. 




Step #13 

Now enlarge the hole with 

a 33/64” (13mm) bit using 

the battery drill VERY 

SLOWLY or turn it by hand. 

This is the hole for the fuse 

holder. 

Step #14 

Using the battery 

drill with a 17/64” 

(6.5mm) bit make 

a hole in the 

position shown in 

picture. 

This is the hole for 

the lever switch. 

Step #15 

Remove the two screws shown in 

picture with the Phillips 

screwdriver. 




Step #16 

The two plastic “fins” (pointed 

by the arrows) must be 

removed. 

That’s an important device, it 

ensures the correct air flow 

while the two fans are working. 

Step #17 

Pick up the electrician’s 

scissors and cut the 

both ends of the fins. 

Step #18 

Pick up the nippers and cut a triangle shape on the fin 

side support as shown in pictures, the first cut at the 

base of the fin, the second just over the first one with 

the nippers rotated by 180° (shown in second 

picture). 




Step #19 

Make the same 

operation on the other 

support and the other 

fin. 

Step #20 

Now remove the fins by 

bending back and forth till 

they come off. 

Step #21 

Reassemble the front grid with its screws 

and now you can see that openings have 

turned in a real functioning air vents. 

Cool, eh? 




Step #22 

Pick up the fuse holder + nut, 

put it in its hole and tight it up 

using a 14mm spanner or 

pliers. 

DON’T TIGHT THE NUT TOO 

MUCH, THERE’S THE RISK TO 

GET IT BROKEN! 

Step #23 

Pick up the lever switch, unscrew the top nut and 

remove the teeth lock washer, leave on the plain 

washer and the bottom nut (1 st picture), put the 

switch in its hole and hold it by fingers correctly 

oriented (2 nd picture). 




Step #24 

Put the teeth lock washer on and then the nut, 

tight it up using an 8mm spanner. 

Step #25 

Pick up the fuse and the fuse socket, put them 

together then insert in the fuse holder. 

Step #26 

Lock the fuse socket screwing it up with the flat screwdriver. 

After this step the job gets more complex and requires more 

and more accuracy. 

Let’s go ahead! 




Step #27 

Now let’s focus on the electronic section. 

Disconnect all the connectors on the main 

board using the pliers or by hand. 

DON’T DISCONNECT PULLING THE WIRES! 

Step #28 

Remove the four screws (red spots in picture) by 

the Phillips screwdriver. 

Step #29 

Picture and text available after 

having purchased the kit. 




Step #30 



Step #31 

Picture and text available after having 

purchased the kit. 

Step #32 






Step #33 

Pictures and text available after having 


Step #34 






Step #35 



Step #36 



Step #37 






Step #38 

Pick up the cable shown 

in picture (reduced 

section on one end). 

Step #39 



Step #40 






Step #41 



Step #42 

Picture and text available after having purchased the 

kit. 

Step #43 






Step #44 



Step #45 

Now pick up the housing cover, it’s time to 

fix the fans appropriately. 

Mount it back on the wheel base as shown 

(no need to screw it up), this procedure is 

for placing correctly the fans in depth of the 

holes as just enough to not touch the motors 

and the upper corners of the electronic 

board once mounted back. 

Step #46 

Insert the fans in the holes 

keeping the wires side facing the 

front of the cover (hub hole). 

THE FAN WITH THE INSERT 

CONNECTOR ON THE BLACK WIRE 

MUST BE MOUNTED ON THE 

SWITCH/FUSE SIDE. 

The correct depth of the fans 

should be about as shown, try to 

find it out by looking through the air vents you opened in the past steps (cool, eh?). 




Step #47 

Remove the cover from the 

base, holding the fans in 

position by hand get them 

blocked using the hot glue 

gun all around their 

perimeter. 

Step #48 

Once the glue has cooled down 

enough get started to make 

electric connections. 

Cut the wires at a convenient 

size and solder the black wire of 

the left fan together with the red 

one of the right fan (connection 

in series) as shown in picture, 

then fix down the wire with a 

drop of hot glue. 




Step #49 

Pick up the two XX resistors, 

they might be XXX + XXX ohm 

or XXX + XXX ohm. 

Pictures and full text available 

after having purchased the kit. 

Step #50 

Cut the red wire of the left fan long enough to 

get 

Picture and full text available after having 


Step #51 

Solder the red wire 

previously cut to the other 

end 

Picture and full text 

available after having 





Step #52 

Fix down the red fans wires with a drop of 

hot glue approximately in the spots shown 

in the pictures highlighted by red arrow. 



Step #53 

Cut and put two stripes of 

insulating tape close to the 

Picture and full text available after 


Step #54 

Pick up the 2.7 inch black 

wire. 




Step #55 

Solder the black wire as shown in 

picture, one end to the side 

contact of the fuse holder and the 

other end to the side contact of 

the switch. 

Get it well shaped bending it on 

the base. 

Step #56 

Pick up the cable 

shown in picture 

(red/black with 

male and female 

connectors). 

Step #57 

Solder the male 

connector wire to the 

bottom contact of the 

fuse holder. 




Step #58 

Solder the female connector 

wire to the centre pin of the 

switch together with the red 

wire of the fans (as shown in 

picture). 

Step #59 

Reassemble the main board in place 

screwing it up and reconnect all the 

connectors 

Full picture and text available after 


Step #60 

Pick up this thin black wire disconnecting it 

from the fan (the one beside the fuse/switch). 




Step #61 

Solder it together with the black wire of 



Step #62 

Locate the supply socket on the wheel base 

and especially its black wire, it’s placed in the 

low left corner. 

Step #63 

Solder the two black wires together with the 

black wire on the supply socket. 

The original wire won’t come off while 

soldering because the copper is folded in the 

pin hole. 




Step #64 

Pick up the nippers and cut the screw side 

support as shown in the red circle. 

You need 



Step #65 

Full text available after having purchased 

the kit. 

Step #66 

Picture and text available after having purchased 

the kit. 




Step #67 

Full picture and text available after having 


Step #68 

Lean the wheel base on the table with 

the hub facing down. 

Pick up the housing cover and 

reconnect the insert connector of the 

black fan wire. 

Step #69 

Connect the insert male 

connector from the main 

board to the female one 

on the cover. 




Step #70 

Make the same on the 

other connector, the 

female from the main 

board to the male on the 

cover. 

Step #71 

Now carefully close the housing taking care of every wire, 

arrange well keeping them beside the motor. 

Full picture available after having purchased the kit. 

Step #72 

If each cable and wire is well set the housing cover 

gets closed by itself with no force applied. 

Now turn the G27 upside down and lock all the eight 

screws back in place. 




Step #73 

Lock the gear-shifter with the Phillips 

screwdriver or the battery screwdriver 

with Phillips bit (better). 

Step #74 

Reconnect the gear switch 

board connector and lock it back 

in place with the two screws 

using the Phillips screwdriver. 




Step #75 

Lock the steering wheel with its 

screws using a 4mm Allen key or the 

battery screwdriver (better and faster) 

with the appropriate bit. 

Step #76 

Now connect the plug of the 

new power supply to the 

steering wheel in the same 

way you would do before 

with the old one, arrange the 

cable in the groove (it’s just 

a bit bigger but it does fit) 

then the other plug in the 

mains socket and last the 

usb connector to your PC. 

YOU GOT IT! 

ENJOY YOUR NEW G27-E BY ARC_TEAM

mod your logitech g27 - ARC_Team

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