I talked to a few other members who have the Kenne Bell supercharger on their truck. I found I am not the only one whos brakes don't work as well with the new bigger blower.

I was wondering if anyone has done anything to improve the performance of the brakes with the KB blower??

I have a feeling since the KB flows so much air, it is robbing vacuum from the brake system. Maybee we can rig up some kind of vacuum canister to store vacuum to help the braking performance.

Thanks
Don

 

I haven't noticed any problems.

 

I would be willing to bet that its not from the blower, but from the big cams.

big cams = very little vaccum..

The blower should have nothing to do with it.

-Dale

 

alot of old muscle car guys used to have really big vacuum reserves.

probably a good idea with big cams, don't know about the blower though

 

they have vacum canisters in jegs.

 

Yes, or it could be a kinked vacuum line from re-installing components. I had that problem on a Mustang once.

 

Don't the GEN I's have a big ole vacuum can too?

 

Im with Dale from Ventura CA on this one.

Which crower cams are you running?

 

It is going to be low vacuum from the longer duration/more overlap, cams.

You can go with a big vacuum reserve tank, an electric vacuum pump, or go to a hydro-boost brake system. There are alot of muscle car owners going the last route.

The hydro-boost system uses a belt driven pump off of the engine.

I just read about a guy that just installed the hydro-booster on a blown musclecar. He said it was unreal compared to anything else.

 

Don...I'd have to jump on the cam band wagon....but, maybe check out the Grand National boards if they are still around. My buddy had a T-Type and went to a big cam and a bigger turbo...he had similar trouble. The GN guys may have a common fix.

 

Whip,

That's exactly what I was going to post. My wife had an 87 GN for 6 years. That was here favorite car of all time that she has owned.

The first thing I noticed that I had never seen on a factory car was the brake assist electric motor.

Check it out Don.

 

I think that Dale hit it. Longer duration cams. We do have 2 of them don't we? I have no problems with my K/B but my motor is stock. In the 60s I have seen guys turn the idle up just the smallest amount and the problem went away. Something like 50 to 100 more rpm. Be careful, Skip

 

Interesting:

"Q: What is a "hydroboost" ?
A: Commonly referred to as "hydrobooster or hydravac" over the years, a high performance hydraulic brake assist booster is a powerful alternative to a vacuum assist type booster. This type of assist unit uses the hydraulic pressure from the power steering system to provide a potent brake pedal assist. Just to name a few, there are a number of Original Equipment Manufactures that are using these styles of units on their vehicles:
-Cobras and all V8 Mustangs (though a much less powerful version!)
-Most 2500 and 3500 Series GMC / Chevy Trucks
-Dodge Ram equipped with Cummins Turbo Diesel
-Ford SuperDuty Series Trucks
-All Hummers"

It appears that the over-12,000 GVW Super Duties have the hydro-boost system. Maybe it could be adapted to the L with a run to the junkyard.

 

Tim,

You're exactly right about the mustangs. I just bought my daughter a 97 GT convertible and I noticed the power steering lines going to the brake master cylinder. There was no vacuum booster behind the master cylinder. I was wondering what was going on with that. Now I know. Thanks for the info.

 

Thanks for the info guys

I don't think it is the cams, but they may have something to do with it. Maybee it's the combo of my cams and KB.

The other week I had to send the KB back to cali since the front bearing was making a noise. While the KB was on it's way from Mass - Cali and back I was running the Eaton. The brakes worked fine then, once the KB went back on I started having brake problems again.

I will look into some of the ideas you all posted.

Thanks
Don