Losing pressure on my brakes after big cam install any ideas?
03-19-2006, 04:46 PM
#1
Losing pressure on my brakes after big cam install any ideas? I have a MS3 in my 98 Z28 Auto
When I am staged at the dragstip the brakes hold util I get my rpms up it slowly loses pressure and the pedal slowly drops until I am pushing it all I can just to hold the car still.
I noticed if I pump the brakes up and hold them while I am in nutrel if I push the gas the brake pedel just drops to the floor. I don't know if thats normal but I never noticed it before.
It seems like I may be losing vacuum but I don't know if thats what it is or maybe the booster is bad?
any suggestions?
When I am staged at the dragstip the brakes hold util I get my rpms up it slowly loses pressure and the pedal slowly drops until I am pushing it all I can just to hold the car still.
I noticed if I pump the brakes up and hold them while I am in nutrel if I push the gas the brake pedel just drops to the floor. I don't know if thats normal but I never noticed it before.
It seems like I may be losing vacuum but I don't know if thats what it is or maybe the booster is bad?
any suggestions?
03-19-2006, 05:00 PM
#2
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I had the same issue after installing the MS3. Rolled through the beams a few times on the first night. I used to be able to footbrake the car to 3,500+ but now I can't go much past 3,000 or so without the car rolling. I completly rebled the brakes and got nothing. I asume it's a vaccume issue, I was thinking of switching to a manual brake set up.
03-19-2006, 05:16 PM
#3
do you think this would help
I found this vacuum pump anyone else have one?:
SSB-28146 $279.95
Estimated Ship Date: Monday
Suggested Parts Show All
Brand: Stainless Steel Brakes Corp. (SSBC)
Product Line: Stainless Steel Brakes Electric Vacuum Pump Kits
Maximum Vacuum (hg): 20
Vacuum Pump Included: Yes
Power Supply: 12 V DC
Vacuum Hose Included: Yes
Vacuum Hose Color: Black
Vacuum Gauge Included: No
Vacuum Control Included: Yes
Mounting Insulators Included: Yes
Switching Relay Included: Yes
Height (in)VL: 7.000 in.
Length (in)VL: 8.000 in.
Width (in)VL: 5.000 in.
Quantity: Sold as a kit.
Vacuum Pump, Street Use, Electric, Kit
The perfect solution for low vacuum.
These Stainless Steel Brakes electric vacuum pump kits are designed for use with a supercharger or big camshaft. They include a 12 V electric vacuum pump to supply your brake booster with the required power for brakes or other sources.
I found this vacuum pump anyone else have one?:
SSB-28146 $279.95
Estimated Ship Date: Monday
Suggested Parts Show All
Brand: Stainless Steel Brakes Corp. (SSBC)
Product Line: Stainless Steel Brakes Electric Vacuum Pump Kits
Maximum Vacuum (hg): 20
Vacuum Pump Included: Yes
Power Supply: 12 V DC
Vacuum Hose Included: Yes
Vacuum Hose Color: Black
Vacuum Gauge Included: No
Vacuum Control Included: Yes
Mounting Insulators Included: Yes
Switching Relay Included: Yes
Height (in)VL: 7.000 in.
Length (in)VL: 8.000 in.
Width (in)VL: 5.000 in.
Quantity: Sold as a kit.
Vacuum Pump, Street Use, Electric, Kit
The perfect solution for low vacuum.
These Stainless Steel Brakes electric vacuum pump kits are designed for use with a supercharger or big camshaft. They include a 12 V electric vacuum pump to supply your brake booster with the required power for brakes or other sources.
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03-20-2006, 05:45 AM
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Originally Posted by brandonppr
specs on cam: http://texas-speed.com/shop/item.asp...d=170&catid=44
What does a vacuum canister do? where do I get one?
What does a vacuum canister do? where do I get one?
Summit I've used them before they do help.
Hawk
03-21-2006, 06:35 AM
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Originally Posted by brandonppr
I ordered a vacuum canister today I will let you guys know how it worked.
03-24-2006, 11:11 PM
#12
I installed it today. It was difficult to find a place to put it close to the brake booster.
I put it close to the headlight I hope thats not to far away and I hope the hose is strong enough to not collapse under vacuum but I think it will work fine.
It seemed better in the driveway but I am going to the track tommorow and will find out for sure. I am afraid to drive it on the street because I only have 12" bullets and no cats so its a little to loud. But I will let you guys know how it worked out.
It was a pain to get the hoses connected.
the canister is from comp cams.
the inlet is 1/2" which is the same as the stock hose but the outlet is 3/8" and I had to go to the hardware store in plumbing to find some fittings to adaplt up to stock size also no one had any hose besides the weak heater hose. So I had to go to a plumbing store and get reinforced hose. I hope this hose holds up to heat also I will be checking on that also. I think I am going to try and find some kind of wrap to protect the hose from heat on the part close to the engine just to be safe. This hose is very tough and stiff. I just got to make sure it stays that way even when the temp goes up.
incase that don't work for the hose do you guys have any ideas for a hose.
they told me a Napa that fuel hose would work but they didn't have and that big.
I put it close to the headlight I hope thats not to far away and I hope the hose is strong enough to not collapse under vacuum but I think it will work fine.
It seemed better in the driveway but I am going to the track tommorow and will find out for sure. I am afraid to drive it on the street because I only have 12" bullets and no cats so its a little to loud. But I will let you guys know how it worked out.
It was a pain to get the hoses connected.
the canister is from comp cams.
the inlet is 1/2" which is the same as the stock hose but the outlet is 3/8" and I had to go to the hardware store in plumbing to find some fittings to adaplt up to stock size also no one had any hose besides the weak heater hose. So I had to go to a plumbing store and get reinforced hose. I hope this hose holds up to heat also I will be checking on that also. I think I am going to try and find some kind of wrap to protect the hose from heat on the part close to the engine just to be safe. This hose is very tough and stiff. I just got to make sure it stays that way even when the temp goes up.
incase that don't work for the hose do you guys have any ideas for a hose.
they told me a Napa that fuel hose would work but they didn't have and that big.
03-24-2006, 11:34 PM
#13
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I had the same problem afet installin a big cam in my father 468 motor, the canister fixed the problem. He really had little or no brake pressure. instant fix.
03-25-2006, 09:56 AM
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Originally Posted by brandonppr
I installed it today. It was difficult to find a place to put it close to the brake booster.
I put it close to the headlight I hope thats not to far away and I hope the hose is strong enough to not collapse under vacuum but I think it will work fine.
It seemed better in the driveway but I am going to the track tommorow and will find out for sure. I am afraid to drive it on the street because I only have 12" bullets and no cats so its a little to loud. But I will let you guys know how it worked out.
It was a pain to get the hoses connected.
the canister is from comp cams.
the inlet is 1/2" which is the same as the stock hose but the outlet is 3/8" and I had to go to the hardware store in plumbing to find some fittings to adaplt up to stock size also no one had any hose besides the weak heater hose. So I had to go to a plumbing store and get reinforced hose. I hope this hose holds up to heat also I will be checking on that also. I think I am going to try and find some kind of wrap to protect the hose from heat on the part close to the engine just to be safe. This hose is very tough and stiff. I just got to make sure it stays that way even when the temp goes up.
incase that don't work for the hose do you guys have any ideas for a hose.
they told me a Napa that fuel hose would work but they didn't have and that big.
I put it close to the headlight I hope thats not to far away and I hope the hose is strong enough to not collapse under vacuum but I think it will work fine.
It seemed better in the driveway but I am going to the track tommorow and will find out for sure. I am afraid to drive it on the street because I only have 12" bullets and no cats so its a little to loud. But I will let you guys know how it worked out.
It was a pain to get the hoses connected.
the canister is from comp cams.
the inlet is 1/2" which is the same as the stock hose but the outlet is 3/8" and I had to go to the hardware store in plumbing to find some fittings to adaplt up to stock size also no one had any hose besides the weak heater hose. So I had to go to a plumbing store and get reinforced hose. I hope this hose holds up to heat also I will be checking on that also. I think I am going to try and find some kind of wrap to protect the hose from heat on the part close to the engine just to be safe. This hose is very tough and stiff. I just got to make sure it stays that way even when the temp goes up.
incase that don't work for the hose do you guys have any ideas for a hose.
they told me a Napa that fuel hose would work but they didn't have and that big.
Let us know how it does though. I think if I need one I'll hide it under the dash and pop acouple of holes in the firewall.
03-26-2006, 08:06 PM
#18
also those hoses held up fine they didn't get too hot but just as a precaution I got some foil tape and wrapped them with it and it kept any heat off and they didn't even get warm. which it was cold out last night but I think its fine.
I did run my fastest time ever last night at a 7.29@94.9 I am pretty sure it was because it was so cold. at one time started snowing during time trials and later on that night everything was covered in frost.
I did run my fastest time ever last night at a 7.29@94.9 I am pretty sure it was because it was so cold. at one time started snowing during time trials and later on that night everything was covered in frost.