"How to" for drill mod??
Instructor
Joined: Jun 2006
Posts: 204
Likes: 0
From: MAGNOLIA TX
Just did mine. Never had a nicer pedal feel. Go for it....it takes five minutes. I saw it done on a clutch replacement step by step photo shoot deal so I thought....what the hell. 
The hydraulic actuator cylinder hose is produced with a narrowed openingthat restricts the flow of hydraulic fluid and thus slows the clutchoperation. The OE purpose for this restriction, as John explains it, isto minimize driveline shock to the rearend, but by slowing down theclutch, it adversely causes more wear to the clutch plates instead.
( vette magazine )
The hydraulic actuator cylinder hose is produced with a narrowed openingthat restricts the flow of hydraulic fluid and thus slows the clutchoperation. The OE purpose for this restriction, as John explains it, isto minimize driveline shock to the rearend, but by slowing down theclutch, it adversely causes more wear to the clutch plates instead.
( vette magazine )
Last edited by QUICKSLVR; May 7, 2008 at 10:19 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,359
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From: Dyer, IN
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
I did this mod years ago and it is really only for guys who race.
You'll find that the clutch is either on or off with this mod, since it widens the supply of hydraulic fluid.
It made it a biotch to slip the textralia twin that I had installed.
You'll find that the clutch is either on or off with this mod, since it widens the supply of hydraulic fluid.
It made it a biotch to slip the textralia twin that I had installed.
Le Mans Master
Joined: May 2006
Posts: 5,987
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From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
Burning Brakes
Joined: Jan 2009
Posts: 939
Likes: 52
From: The Woodlands Texas
The vette guys are way behind the fbody guys with this. We were doing this back in the late 90's because of clutch pedals sticking to the floor at the track. This mod alone solved the issue. This mod also does nothing for the shifting of the tranny. If you have problems shifting then this mod will not change that. Go over to LS1Tech and read in depth about it if you want.
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6th Gear
Joined: Aug 2010
Posts: 6
Likes: 0
From: Williamston SC
i have a 00 frc. i am experienceing the clutch pedal sticking to the floor on my way to a hard third gear. all the people i talked to and all the research i have done suggest i need the drill mod. so far i have found that you undo the quick connect hose that is going to the slave from the master. it is 1/16 now, drill it to 1/8.
Tech Contributor
Joined: Jan 2007
Posts: 19,359
Likes: 1,127
From: Dyer, IN
i have a 00 frc. i am experienceing the clutch pedal sticking to the floor on my way to a hard third gear. all the people i talked to and all the research i have done suggest i need the drill mod. so far i have found that you undo the quick connect hose that is going to the slave from the master. it is 1/16 now, drill it to 1/8.
Drifting
Joined: Sep 2008
Posts: 1,389
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From: somewhere shooting my assault rifles
6th Gear
Joined: Aug 2010
Posts: 6
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From: Williamston SC
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Hi Don. I saw your pix of your Centerforce. 
Several years ago I tried the drill mod. Actually the mod was done by Shirl Dickey out in Phoenix. He found that there is more than one restrictor and he would remove one end of the steel line, drill out the restrictor you can't get to (curve in the C5 line) and then he re-brazed the end of the line back on. He did a decent job. No leaks, etc. Trouble is, I still had sticking clutch pedal problems both with the Z06 clutch AND a Textralia X-grip I had AND a Monster Level V before.
I now have a Tick M/C with my McLeod RST and no more sticking at all.
YMMV
Several years ago I tried the drill mod. Actually the mod was done by Shirl Dickey out in Phoenix. He found that there is more than one restrictor and he would remove one end of the steel line, drill out the restrictor you can't get to (curve in the C5 line) and then he re-brazed the end of the line back on. He did a decent job. No leaks, etc. Trouble is, I still had sticking clutch pedal problems both with the Z06 clutch AND a Textralia X-grip I had AND a Monster Level V before.
I now have a Tick M/C with my McLeod RST and no more sticking at all.
YMMV
Safety Car
Joined: Oct 2007
Posts: 3,903
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From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
Tech Contributor
Joined: Jan 2007
Posts: 19,359
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From: Dyer, IN
Former Vendor
Joined: Jun 2008
Posts: 1,222
Likes: 7
From: Mount Airy NC
I always liken the drill mod to putting a band-aid on a gunshot wound - sure, it may help a tad, but it doesn't actually fix the problem. The problem is that the factory master cylinder just doesn't flow enough fluid to disengage most clutches.
We designed our kit to eliminate that issue, as seen here:
Thank you for your business, and I'm glad you're satisfied with our product!
Those of you on the fence, check out our FAQ here for a good read: http://www.tick-performance.com/tick...aulics/#master
We designed our kit to eliminate that issue, as seen here:
Hi Don. I saw your pix of your Centerforce.
Several years ago I tried the drill mod. Actually the mod was done by Shirl Dickey out in Phoenix. He found that there is more than one restrictor and he would remove one end of the steel line, drill out the restrictor you can't get to (curve in the C5 line) and then he re-brazed the end of the line back on. He did a decent job. No leaks, etc. Trouble is, I still had sticking clutch pedal problems both with the Z06 clutch AND a Textralia X-grip I had AND a Monster Level V before.
I now have a Tick M/C with my McLeod RST and no more sticking at all.
YMMV
Several years ago I tried the drill mod. Actually the mod was done by Shirl Dickey out in Phoenix. He found that there is more than one restrictor and he would remove one end of the steel line, drill out the restrictor you can't get to (curve in the C5 line) and then he re-brazed the end of the line back on. He did a decent job. No leaks, etc. Trouble is, I still had sticking clutch pedal problems both with the Z06 clutch AND a Textralia X-grip I had AND a Monster Level V before.
I now have a Tick M/C with my McLeod RST and no more sticking at all.
YMMV
Those of you on the fence, check out our FAQ here for a good read: http://www.tick-performance.com/tick...aulics/#master
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The clutch MASTER & Slave Cylinder are connected by a "SINGLE HOSE". That being stated, the hose is the SUPPLY & RETURN for the clutch hydraulics system.
So,,,it's NOT just return line.
BC
Pro
Joined: Mar 2010
Posts: 691
Likes: 19
From: Los Angeles
Not trying to highjack the thread but I'm having this issue as well but its not while racing or high in the rpm range. I didnt have a problem all summer but now in the mornings sometimes when its cold (30*), it sticks or takes a couple seconds for the pedal to come back up. is this the same as what you are all talking about?
Intermediate
Joined: Feb 2010
Posts: 25
Likes: 0
From: keego harbor mi
Would say so. At 30 degrees the viscosity of dot3 or 4 will be much thicker. If there is a restriction I could see this being the problem. My car had a new master slave clutch, pressure plate and flywheel installed 10k ago and has stuck ever since the hci mods. I will be replacing the clutch and hydraulics soon and fully plan on thedrillmod. I don't plan on having to disassemble this again and see no harm.
Any objections?
Any objections?