350R Brake Booster

[apex15stangPP]

Has anyone thought of trying to fit a 350R brake booster? Wonder if there is some pedal feel and brake performance to be had?

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[ddozier]

Not sure what the differences are in the boosters but I am thinking about adding a vac canister in front of the stock GT brake booster, I have had a few times that while rev matching on downshifts and hard on the brakes that I have lost servo assist of the brakes. For the few times that it has happened I think it is caused by over shooting the rev match while trail braking into a corner, then the pedal goes hard with no assist left from the brake booster.

I have a gut feeling that it is also being aggravated by the cars tendency to hang the throttle at high RPMs when the clutch is engaged. The stock tune did this a little but the Lund tune does it as well. I think the throttle is hanging open for a second and delaying the building of vac signal to the brake booster. Adding the vac canister and having a large reserve of vac signal may result in a more consistent brake feel in the long run as well. They are cheap and easy to install so it is worth a try and can not hurt. Since I have a cage and nothing under my dash I will likely add it under the dash near the brake pedal assembly.

Dave

 

[apex15stangPP]

That's a good idea too. I think I just need more pressure with the upgraded brakes. When I come back in off track brake fluid is making it past the cap and getting messy. Car stops great now, but just wondering if a $100 brake booster could take it to the next level.

 

[sigintel]

Vac failsafe

I had noticed vac assist issues as well and was thinking about stealing the electric vac backup from a Traverse to test.
Any experience with setting these up?
You have a part in mind?

 

[ddozier]

I had noticed vac assist issues as well and was thinking about stealing the electric vac backup from a Traverse to test.
Any experience with setting these up?
You have a part in mind?

Something like this one from Jegs or the one from Comp Cams. They include a check valve and fittings so all that is needed is some longer pieces of hose to splice the canister in between the vac source and the brake booster.

http://www.jegs.com/i/JEGS-Performance-Products/555/63010/10002/-1

 

[sigintel]

Ahhh, I was thinking Aux vac pump like newer truck/SUV where you get electric vac even if motor locks or bogs.

 

[chrisgonzales]

Did anyone ever attempt any of the above. The hard pedal happened to me a few times this weekend. It happened my last event earlier this year but only once or twice and didn't really understand it but between then and last weekend i sort have learned it was the booster assist. Happened a few times this week that were a bit scary not brake fade it was definetly hard pedal. I think with the addition of having a gt350 manifold and from what i read above rev matching or in my case autoblip i run out of vacuum or not enough to start with. Looking into a solution as i had to hold back on my brake a bit just to make sure i didn't overcook it into a turn. I'm also running gloc r16 so i was also learning what a track pad was capable of but would rather have a solution that i can do and not worry again.

Thanks in advance

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