Another thing. You might need a proportioning valve on the front circuit due to the weight difference. The SL-C is around 60/40 and Camaro I guess close to 48/52. (Rear/Front)
Thanks again for the info Johan, looks like summit sells a switch to control the Hella air pump so I’ll probably get the combo. Is the pump noisey?For the pump, I got a pressure switch from the junkyard from a Volvo V70 T5.
But some of the pumps have the switch built in. Don’t think the UP50 have one, I can check the part no on Monday.
My measurements of the second hole is 76mm up from the lowest hole and then 32mm between the second and third. Total length of the slave is 108mm. That is around 3.52:1. I made a last minute change of the ratio due to the lower weight of the SL-C compared to the Camaro.
I don’t have the experiance to figure out what ratio will be correct for a light car like ours, so this will be trial and error.
But if you want 3.8:1 you should place the second/middle hole 76% over the bottom hole. That is if your Tilton ratio is 5.0:1.
Nice work Johan, if I am reading your post correctly you have actually driven the car with the power brakes installed? If so, how did the pedal feel with the ratio you selected?I had to place the steering rack mount on top i.s.o below the rack, due space limited. The final selection of vaccum pump is the Hella UP 5.X, it's designed to independently supply the required vaccum for brake booster and other components such as doorlocks.
I also added a proportioning valve to the rear circuit, however I'm not completely convinced, it might be needed to the front circuit, time and testing will tell.
Pressure testing shows 1200 psi front and 950 psi rear without any adjustment on the valve and so far I've only done road test up to 90 km/h, no high speed test. Front lockes up first (as it should) and I haven't been able to lock the rear.
It's getting really crowded up front now, can't fit much more in there.
Nice work Johan, if I am reading your post correctly you have actually driven the car with the power brakes installed? If so, how did the pedal feel with the ratio you selected?
Joel, yes I have driven it with PB but without the front clam. The pedal feels close to perfect, if anything a touch too much ratio, final decision will be after test drive with the front clam on.Nice work Johan, if I am reading your post correctly you have actually driven the car with the power brakes installed? If so, how did the pedal feel with the ratio you selected?
The driveshaft shop has a adapter plate made available now to address this concern. Only problem is the axleshafts need to be shortened 5/8"Up until now I`ve had the Graz KBA (unmodified) in the car and this saturday I decided to swap to my KVJ (modified drop gear). Everything went smooth until the last thing to tighten, the drive shafts. As it turns out Audi apparently changed the diameter of the bolt circle on the transmission mounting flange from approx 95mm on the KVJ to 93mm on the KBA, so I eighter need new drive shafts to the KVJ or swap back to the KBA. Fortunatly I have another set of 1.04:1 drop gear, so I went ahead and changed it in the KBA.
It went a lot easier this second time around, the Graz was apart in a little over 2 hours.