Wilwood Master Cyl question - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

NoNeck · 05-06-2013, 05:49 PM

Ed -

Here is the pic of the m/c hole and spacer plus one with the spacer installed. It looks just like yours doesn't it?

I noticed you are using a CPP master. Is it 1.21" (1-1/8") bore? Maybe only the 7/8" and 1" bore m/c use the spacer thingy... I could be wrong.

Chad has ordered several different length pushrods from Wilwood, so we are going to experiment with them when they get here.

Thanks, POP

**lolife99** · 05-06-2013, 06:02 PM

What does the front of the booster look like?
I always thought the spacer what needed for the trucks that run a booster.
(like in the second picture)
Flush with the back of the Wilwood M/C.

**nlped** · 05-06-2013, 06:07 PM

I'm with Keith! Mine looks just like the 2nd picture and I've been running it for quite some time. I just bought the aluminum one from Shawn072 because I'm great at pissin money away

. I'd tell you to try the spacer... Mine has been on 2 other trucks before the '70 model...all with a p/b booster and the McGaughy 13" brake kit front & rear. I think that's the "ticket".

**nlped** · 05-06-2013, 06:09 PM

My only other thought is that the pieces that came with the Wilwood go in the stock booster pushrod after you take out the adjustable "head" from the o.e. piece... just a thought?

shawno72 · 05-06-2013, 06:09 PM

Maybe you need to cut the spacer down to get the correct length??

**nlped** · 05-06-2013, 06:15 PM

I just double checked mine...okay like quadruple checked mine, and I am using the same booster pushrod (your pic "A") and I still had to use the spacer piece. My spacer piece is slightly longer than yours at 1 1/2" in length and I still had to adjust out the stock pushrod only slightly to get the appropriate drag on the m/c (or lack there of...something to do with pedal freeplay, I believe). I'm totally convinced that you should use the stock pushrod and the spacer doohickey.

Put a little anti-seize on the spacer, put it in the M/C, install the o.e. pushrod into the booster, mount the M/C & give the pedal a push... bet you get fluid outta that M/C then... Be sure to put the bleeder lines back into the reservoir so you don't make a mess.

Rusbuilt · 05-06-2013, 07:32 PM

So just to make sure I understand correctly... With the mater cylinder mounted in place and the lines disconnected fluid doesn't even drip out?

**nlped** · 05-06-2013, 07:48 PM

It shouldn't, right? Without compressing the piston, the reservoir is not "open" to leak out. Mine didn't leak but a drop or 2 when I pulled the bench bleed lines and installed the factory steel lines. Mine bled fine...after much pedal pushing.

Posted via Mobile Device

**CC69Rat** · 05-06-2013, 07:56 PM

Correct, .. thinking gravity feed, .. with the lines disconnected from the ports on the MC no fluid comes out. But, is is supposed to?

Pop, .. I think we need the doohickey. We just have to find the right pushrod. Don't hesitate to cut one if you need to.

(the push rod! .. )

**nlped** · 05-06-2013, 08:09 PM

Lol. I'm thinking that you're over thinking it. Use the stock pushrod (screw it all the way in to start) and put in the doohickey and bleed the brakes. Then adjust the pushrod once you have appropriately bled brakes.

That's A LOT of pushrod, screwing & doohickey references.

Posted via Mobile Device

NoNeck · 05-06-2013, 08:10 PM

Keith -

Here is a pic of the front of the CPP booster. The pushrods that came with the Wilwood M/C have little tips on the end that insert into the booster. Does that round metal thingy (Ed's word) on the end of the original pushrod come off? It doesn't look like it does.

On stock M/C's, there seems to be a lot more fluid seeping when you remove the bleeder screws to connect your metal lines. We get maybe a drop or two.

But, when bench bleeding the fluid really flows great through the clear bleeding tubes using a large phillips head screwdriver.

Maybe, since we now have 4 huge Corvette style units and replaced most of the brake lines, it will take a LOT of fluid to get them full.

Thanks guys!
POP

NoNeck · 05-06-2013, 08:16 PM

Ed -

After inserting the spacer in your M/C, did you have to apply a good bit of force to get it to slip over the booster bolts and depress the pushrod?

I tried using the insert in the M/C, but I couldn't get it to slide over the bolts?

POP

NoNeck · 05-06-2013, 08:22 PM

Oh, by the way... the stock pushrod will not insert into the CPP booster with that big circular metal thing on the end. The rubber shroud inside the hole is different from the original one. You can see the original rubber "washer" that slides into the factory booster still hanging on the pushrod "A" in my photos.

I was using the longer Wilwood pushrod "B" with the spacer when the M/C didn't want to slide on the CPP booster as stated above.

POP

**CC69Rat** · 05-06-2013, 08:38 PM

Ok, .. let's just stop. I have three Wilwood branded (if that matters) push rods on the way. Summit had three available so we can just use the one we need and send the other ones back. All three of them make reference to using a Wilwood tandem MC with a booster.

Lets just wait and see what those do. Pop, I'll come up after work tomorrow and we'll look at it again.

**CC69Rat** · 05-06-2013, 08:43 PM

Summit part numbers:

WIL-230-9384 http://www.summitracing.com/parts/wil-230-9384
WIL-230-3776 http://www.summitracing.com/parts/wil-230-3776
WIL-230-6926 http://www.summitracing.com/parts/wil-230-6926

Maybe one of these will work.

**nlped** · 05-06-2013, 08:48 PM

Wow!!! Well, waiting seems to be the smart thing to do.
Posted via Mobile Device

NoNeck · 05-06-2013, 09:05 PM

Sounds good... we'll get it figured out. I will get with you tomorrow.

POP

Rusbuilt · 05-06-2013, 09:14 PM

Fluid should leak out of the MC when lines are unhooked. Think about it, gravity bleeding plus breaks can leak down sometimes while a truck sits. I would take the plugs out on both sides of the MC and see if fluid comes out.

**nlped** · 05-06-2013, 09:58 PM

Go to sleep. We will get it figured out tomorrow.

Posted via Mobile Device

**CC69Rat** · 05-07-2013, 06:48 PM

We have brakes!

Short push rod + doohickey = fluid.

Thanks everyone for your help.
Posted via Mobile Device

shawno72 · 05-07-2013, 08:10 PM

Quote:

Originally Posted by CC69Rat

We have brakes!

Short push rod + doohickey = fluid.

Thanks everyone for your help.
Posted via Mobile Device

Rusbuilt · 05-07-2013, 08:47 PM

Good deal!

**nlped** · 05-07-2013, 08:58 PM

Excellent!!! I'm you & Pops are happy happy happy.
Posted via Mobile Device

NoNeck · 05-07-2013, 09:53 PM

I'm happy!!! Thanks guys.

POP

**CC69Rat** · 05-07-2013, 09:57 PM

Not bad Pops! We have 95% pedal without the booster / engine running. I can't wait to drive it and once the booster engages... woo wee!

Posted via Mobile Device

05-06-2013, 05:49 PM	#26
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question Ed - Here is the pic of the m/c hole and spacer plus one with the spacer installed. It looks just like yours doesn't it? I noticed you are using a CPP master. Is it 1.21" (1-1/8") bore? Maybe only the 7/8" and 1" bore m/c use the spacer thingy... I could be wrong. Chad has ordered several different length pushrods from Wilwood, so we are going to experiment with them when they get here. Thanks, POP Attached Images __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-06-2013, 06:02 PM	#27
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,683	Re: Wilwood Master Cyl question What does the front of the booster look like? I always thought the spacer what needed for the trucks that run a booster. (like in the second picture) Flush with the back of the Wilwood M/C. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

05-06-2013, 06:07 PM	#28
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question I'm with Keith! Mine looks just like the 2nd picture and I've been running it for quite some time. I just bought the aluminum one from Shawn072 because I'm great at pissin money away . I'd tell you to try the spacer... Mine has been on 2 other trucks before the '70 model...all with a p/b booster and the McGaughy 13" brake kit front & rear. I think that's the "ticket". __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 06:09 PM	#29
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question My only other thought is that the pieces that came with the Wilwood go in the stock booster pushrod after you take out the adjustable "head" from the o.e. piece... just a thought? __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 06:09 PM	#30
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Re: Wilwood Master Cyl question Maybe you need to cut the spacer down to get the correct length?? __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

05-06-2013, 06:15 PM	#31
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question I just double checked mine...okay like quadruple checked mine, and I am using the same booster pushrod (your pic "A") and I still had to use the spacer piece. My spacer piece is slightly longer than yours at 1 1/2" in length and I still had to adjust out the stock pushrod only slightly to get the appropriate drag on the m/c (or lack there of...something to do with pedal freeplay, I believe). I'm totally convinced that you should use the stock pushrod and the spacer doohickey. Put a little anti-seize on the spacer, put it in the M/C, install the o.e. pushrod into the booster, mount the M/C & give the pedal a push... bet you get fluid outta that M/C then... Be sure to put the bleeder lines back into the reservoir so you don't make a mess. __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 07:32 PM	#32
Rusbuilt Registered User Join Date: Mar 2012 Location: Knoxville, TN Posts: 5,381	Re: Wilwood Master Cyl question So just to make sure I understand correctly... With the mater cylinder mounted in place and the lines disconnected fluid doesn't even drip out? __________________ -Rus PLEASE HELP WITH PROJECT UNDERHAULINPaypal donations accepted @ rus1785@yahoo.com Rusbuilt's garage 1968 Chevy C-30 Darcy SOLD Rusbuilt shop truck *SOLD*

05-06-2013, 07:48 PM	#33
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question It shouldn't, right? Without compressing the piston, the reservoir is not "open" to leak out. Mine didn't leak but a drop or 2 when I pulled the bench bleed lines and installed the factory steel lines. Mine bled fine...after much pedal pushing. Posted via Mobile Device __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 07:56 PM	#34
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Wilwood Master Cyl question Correct, .. thinking gravity feed, .. with the lines disconnected from the ports on the MC no fluid comes out. But, is is supposed to? Pop, .. I think we need the doohickey. We just have to find the right pushrod. Don't hesitate to cut one if you need to. (the push rod! .. ) __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

05-06-2013, 08:09 PM	#35
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question Lol. I'm thinking that you're over thinking it. Use the stock pushrod (screw it all the way in to start) and put in the doohickey and bleed the brakes. Then adjust the pushrod once you have appropriately bled brakes. That's A LOT of pushrod, screwing & doohickey references. Posted via Mobile Device __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 08:10 PM	#36
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question Keith - Here is a pic of the front of the CPP booster. The pushrods that came with the Wilwood M/C have little tips on the end that insert into the booster. Does that round metal thingy (Ed's word) on the end of the original pushrod come off? It doesn't look like it does. On stock M/C's, there seems to be a lot more fluid seeping when you remove the bleeder screws to connect your metal lines. We get maybe a drop or two. But, when bench bleeding the fluid really flows great through the clear bleeding tubes using a large phillips head screwdriver. Maybe, since we now have 4 huge Corvette style units and replaced most of the brake lines, it will take a LOT of fluid to get them full. Thanks guys! POP Attached Images __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-06-2013, 08:16 PM	#37
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question Ed - After inserting the spacer in your M/C, did you have to apply a good bit of force to get it to slip over the booster bolts and depress the pushrod? I tried using the insert in the M/C, but I couldn't get it to slide over the bolts? POP __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-06-2013, 08:22 PM	#38
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question Oh, by the way... the stock pushrod will not insert into the CPP booster with that big circular metal thing on the end. The rubber shroud inside the hole is different from the original one. You can see the original rubber "washer" that slides into the factory booster still hanging on the pushrod "A" in my photos. I was using the longer Wilwood pushrod "B" with the spacer when the M/C didn't want to slide on the CPP booster as stated above. POP __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-06-2013, 08:38 PM	#39
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Wilwood Master Cyl question Ok, .. let's just stop. I have three Wilwood branded (if that matters) push rods on the way. Summit had three available so we can just use the one we need and send the other ones back. All three of them make reference to using a Wilwood tandem MC with a booster. Lets just wait and see what those do. Pop, I'll come up after work tomorrow and we'll look at it again. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

05-06-2013, 08:43 PM	#40
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Wilwood Master Cyl question Summit part numbers: WIL-230-9384 http://www.summitracing.com/parts/wil-230-9384 WIL-230-3776 http://www.summitracing.com/parts/wil-230-3776 WIL-230-6926 http://www.summitracing.com/parts/wil-230-6926 Maybe one of these will work. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)



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05-06-2013, 08:48 PM	#41
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question Wow!!! Well, waiting seems to be the smart thing to do. Posted via Mobile Device __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-06-2013, 09:05 PM	#42
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question Sounds good... we'll get it figured out. I will get with you tomorrow. POP __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-06-2013, 09:14 PM	#43
Rusbuilt Registered User Join Date: Mar 2012 Location: Knoxville, TN Posts: 5,381	Re: Wilwood Master Cyl question Fluid should leak out of the MC when lines are unhooked. Think about it, gravity bleeding plus breaks can leak down sometimes while a truck sits. I would take the plugs out on both sides of the MC and see if fluid comes out. __________________ -Rus PLEASE HELP WITH PROJECT UNDERHAULINPaypal donations accepted @ rus1785@yahoo.com Rusbuilt's garage 1968 Chevy C-30 Darcy SOLD Rusbuilt shop truck *SOLD*

05-06-2013, 09:58 PM	#44
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question Go to sleep. We will get it figured out tomorrow. Posted via Mobile Device __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-07-2013, 06:48 PM	#45
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Wilwood Master Cyl question We have brakes! Short push rod + doohickey = fluid. Thanks everyone for your help. Posted via Mobile Device __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

05-07-2013, 08:47 PM	#47
Rusbuilt Registered User Join Date: Mar 2012 Location: Knoxville, TN Posts: 5,381	Re: Wilwood Master Cyl question Good deal! __________________ -Rus PLEASE HELP WITH PROJECT UNDERHAULINPaypal donations accepted @ rus1785@yahoo.com Rusbuilt's garage 1968 Chevy C-30 Darcy SOLD Rusbuilt shop truck *SOLD*

05-07-2013, 08:58 PM	#48
nlped Senior Member Join Date: Jul 2009 Location: Hayden, Al. Posts: 4,147	Re: Wilwood Master Cyl question Excellent!!! I'm you & Pops are happy happy happy. Posted via Mobile Device __________________ Carter 1968 Chevy SWB Fleet... Walt 1963-1/2 Ford Falcon Futura...Martha

05-07-2013, 09:53 PM	#49
NoNeck Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 1,106	Re: Wilwood Master Cyl question I'm happy!!! Thanks guys. POP __________________ 2016 RAM Laramie HEMI 1966 Fairlane GT/A, 390/335 HP If it costs you a dollar to make a friend, KEEP THE DOLLAR. If it costs you a friend to make a dollar, KEEP THE FRIEND.

05-07-2013, 09:57 PM	#50
CC69Rat Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,205	Re: Wilwood Master Cyl question Not bad Pops! We have 95% pedal without the booster / engine running. I can't wait to drive it and once the booster engages... woo wee! Posted via Mobile Device __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

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