Harrison brakes - Page 4

DaveW · #1 (**permalink**) 08-30-2011, 02:58 AM

Hi Merv,
i just got a set of AP 5147 for the rear of mine, in the mounting instructions it shows the bleeder nipple at the top and the crossover pipe on the bottom. the calipers where labelled as LHT (Left hand trailling) and RHT.
There are 2 different sized pistons on the 5200's, 38.1mm for the leading piston and 41.275 for the trailing, if the calipers are upside down, the pistons will be arse about.
I have a PDF spec sheet for the 5200's if you need it.
Are your calipers on the wrong side (upside down).
Dave

Merv and Sharon · #2 (**permalink**) 08-30-2011, 03:11 AM

Good spotting Dave. That was a quick trial fit as I played around with the brackets. Then I looked and remembered that air bubbles rise ... Right, the bleeder nipples are swapped over and on top now.

Wazza · #3 (**permalink**) 08-30-2011, 05:32 AM

As per the name of this thread....

I thought some would like to see the Harrison Brakes...

they're on Warwick and Tony's new Track Cobra...to be finished in time for the Nationals.

The Brakes are HUGE.....they should do the job !

Cheers,
Warren.

sambo · #4 (**permalink**) 08-30-2011, 06:40 AM

Serious hardware Wazza! Do you know whether the adjustable A arms are engineer approved?

sambo · #5 (**permalink**) 08-30-2011, 04:43 PM

Quote:

Originally Posted by sambo

Do you know whether the adjustable A arms are engineer approved?

Answering my own question here... just spoke to Warwick and those arms are Factory Five items with some changes to match the length of his standard arms and also the uprights are modified to accommodate threaded ball joints which are supplied with the FF arms.

Merv and Sharon · #6 (**permalink**) 09-01-2011, 02:35 PM

Same springs and shocks as normal? That is a Daytona with a big block Ford?

sambo · #7 (**permalink**) 09-01-2011, 03:12 PM

Hard to say how those springs are rated Merv but 500lb wouldn't be out of the question?

Merv and Sharon · #8 (**permalink**) 09-01-2011, 03:43 PM

That is a lot Paul! In my enquiries about shocks and springs I have learned a bit. I thought that my 300 at the front was light but was told Falcons have 160 or 190. It is all about the balance between the springs and the shocks and the preload I gather. Others would know much more. Also with a front sway bar you can have softer springs it seems.

sambo · #9 (**permalink**) 09-01-2011, 05:19 PM

Yes a sway bar contributes to the spring rate on the loaded corner. My guesstimate of 500lb was arrived at by figuring that with say a 100kg heavier engine you need to provide an extra 200lb of spring tension. I overlooked the fact that there is more than one spring absorbing the weight, but fortunately I'm a computer geek and not chassis engineer.

Those yellow springs do look beefier than normal though.