Rally Colorado XR$TI Rally Debut, Just two days away

It's just the compound. The nice thing about it is that it lets me see when I'm using them on stage.
I'll buy new pads soon though.

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Grant Hughes

not to mention the rattling. everytime it started or drove in people would ask if the car was ok.

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-Mark
www.nocoastmotorsports.net

I totally sounds like it's going to fall apart at any moment doesn't it.

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Grant Hughes

Took the car out to CORE yesterday with Mark and Dave and Allison Kern in their monster hill climb Evo. It was a fun day and beat the piss out of the car. Drove home on three cylinders, a problem which came up right as we were getting ready to leave. Suppose I might actually change the spark plugs. I've not even looked at them. Ever. Guessing it's that since with the BOV it has rich little moments. Though it could easily be injectors or even something worse.
But I did come upon one thing which will be an issue that I was curious as to a fix. I never had a problem with this at the rally, but as I said, I was driving like a bit of a nanny most of the time. When I'm really hammering on it I find I'll often be flat out down a long straight after some tight twisty stuff and my brake pedal is so soft I have to brake early to pump it up. I went straight off the outside of two hairpins during the course of the day because I couldn't get stopped in time. Is there anything out there that keeps the piston knock back to a minimum?

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Grant Hughes

NoCoast Wrote:
-------------------------------------------------------
> to pump it up. I went
> straight off the outside of two hairpins during
> the course of the day because I couldn't get
> stopped in time. Is there anything out there that
> keeps the piston knock back to a minimum?
>
> Grant Hughes
> www.nocoastmotorsports.net
> Denver, CO

Yeah. Big fresh wheelbearings, hefty flanges, secure caliper mounting.
And a STIFF pedalbox.

Ever heard of residual pressure valves?

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Monika Hawkinson
Seattle, WA

Put a light 2lb residual pressure valve in the lines to keep the pads from getting knocked back PN/260-1874

http://www.wilwood.com/Products/006-MasterCylinders/010-RPV/index.asp

Sofa King Wrote:
-------------------------------------------------------
> Yeah. Big fresh wheelbearings, hefty flanges,
> secure caliper mounting.
> And a STIFF pedalbox.
>
> Ever heard of residual pressure valves?

Well, I've got new wheel bearings, a reinforced firewall for the pedal box, and secure caliper mounting. Guess I'll add in the residual pressure valve, and no, I'd never heard of them. Thanks Tim for the part number!

I also need to get some shoes with better support. My foot hurts from stomping the brakes.

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Grant Hughes

Floating rotors are supposed to help the knockback issue too right?

But probably in a minor way, not so far as Grant is talkin.

My SC does this sometimes. When you first hit the brakes the pedal drops a bit but subsequent braking the pedal is all the way up and firm.

I'll be looking to see if this valve saves the day.

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Michael LeCompte



Edited 1 time(s). Last edit at 09/22/2008 12:41PM by pikespeakgtx.

Disassemble the calipers, and install "knockback" springs behind he pistons.

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Chris

Sofa King Wrote:
>
> Ever heard of residual pressure valves?
>
> Kevin Hawkinson
> Seattle, WA
> 83 Volvo 240 Gp5 (in progress)
> 34-ish


this may be a silly question, but can you use those on any system? aka something other than wilwood.

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-Mark
www.nocoastmotorsports.net

NoCoast Wrote:
-------------------------------------------------------
> Took the car out to CORE yesterday with Mark and
> Dave and Allison Kern in their monster hill climb
> Evo. It was a fun day and beat the piss out of
> the car. Drove home on three cylinders, a problem
> which came up right as we were getting ready to
> leave. Suppose I might actually change the spark
> plugs. I've not even looked at them. Ever.
> Guessing it's that since with the BOV it has rich
> little moments. Though it could easily be
> injectors or even something worse.
> But I did come upon one thing which will be an
> issue that I was curious as to a fix. I never had
> a problem with this at the rally, but as I said, I
> was driving like a bit of a nanny most of the
> time. When I'm really hammering on it I find I'll
> often be flat out down a long straight after some
> tight twisty stuff and my brake pedal is so soft I
> have to brake early to pump it up. I went
> straight off the outside of two hairpins during
> the course of the day because I couldn't get
> stopped in time. Is there anything out there that
> keeps the piston knock back to a minimum?
>
> Grant Hughes
> www.nocoastmotorsports.net
> Denver, CO


i got to drive the car too and it was awesome. the set up wasn't to my liking in terms of pedals and such, but it's not my car so ok. it definitely is a different driving style when really going at it. in my car (awd no fancy diffs) i expect the front to slide a lot more. in grant's, when it slides it slides straight, and when you hammer the throttle hoping to pull out of a partial spin, you just end up backwards.

good times, but i think the car needs another 50-100 hp. just because.

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-Mark
www.nocoastmotorsports.net

Mark Wrote:
-------------------------------------------------------
> good times, but i think the car needs another
> 250-300 hp. just because.

Fixed that for you.

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Grant Hughes

Mark Wrote:
-------------------------------------------------------
> Sofa King Wrote:
> >
> > Ever heard of residual pressure valves?
> >
> > Kevin Hawkinson
> > Seattle, WA
> > 83 Volvo 240 Gp5 (in progress)
> > 34-ish
>
>
> this may be a silly question, but can you use
> those on any system? aka something other than
> wilwood.

Sure, everybody sells them like AP, they just cost more someplaces.
>
> -Mark
> www.nocoastmotorsports.net
> www.coloradorallycup.org

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Monika Hawkinson
Seattle, WA

I'll ask a silly question do you have a power booster(vacuum) on the brake system?
If so you are loosing vacuum and the brakes are harder to get working without it.

Nick

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Nick Leone
Former scca member

grant just posted this up. footage from rfkac:

http://videos.streetfire.net/video/Elkhead-Flats-on-board_186617.htm

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-Mark
www.nocoastmotorsports.net