Supercharging: Need shopping list
10-20-2011, 08:48 AM
#61
Nordschleife Master
10-20-2011, 10:51 AM
#62
Nordschleife Master
They all accommodate two brake lines, one from the master cylinder and the other to the brake circuit. Many out there new and used, search google, amazon, eBay, etc. If I remember correctly my early Alfa had one from the factory.
10-20-2011, 11:04 AM
#63
Nordschleife Master
From a dual master cylinder, so two lines in and two out.
10-20-2011, 11:38 AM
#64
Nordschleife Master
Ah, so you want to maintain dual circuit brakes. You need two remote boosters to do that which would require more space. I have seen a single small booster fed from the front brake line only and going to the front brakes and a bias valve fitted to the rear brake circuit. This gives you boosted front brakes (which is where you most need it), and non-boosted rears. The rears can be evened out using a bias valve which the 951 has anyway, just upgrade to a larger rear bias.
Don't forget the brake booster doesn't actually apply more pressure, it just lessons the effort (demand at the pedal) required. Because of this the rears will not see as much "demand" so you will have to change the rear bias valve to even that out.
Italian cars used Bonaldi remote boosters a lot, early Alfa Spiders, Maserari's, etc. Also I think the 56/57 T-Bird. Check on the Cobra sites also, they sometimes use remote boosters due to space.
Back to topic....
Don't forget the brake booster doesn't actually apply more pressure, it just lessons the effort (demand at the pedal) required. Because of this the rears will not see as much "demand" so you will have to change the rear bias valve to even that out.
Italian cars used Bonaldi remote boosters a lot, early Alfa Spiders, Maserari's, etc. Also I think the 56/57 T-Bird. Check on the Cobra sites also, they sometimes use remote boosters due to space.
Back to topic....
10-21-2011, 06:39 AM
#65
Racer
Join Date: Oct 2003
Location: Palm Beach, FL / Hamburg, DE
Posts: 418
Likes: 0
Received 9 Likes
on
9 Posts
I've got a used supercharger and all accessories that was on my 968 motor that I'll sell for a good price. I even have a selection of intercoolers that I'll throw in. PM me if interested. The SC is from 928 Motorsports
Still available? PM sent.
MN
10-21-2011, 08:29 AM
#66
Rennlist Member
Oh, and yes, Supercharging Rocks!
10-21-2011, 02:00 PM
#68
Nordschleife Master
So what was involved in adjusting to this setup Tim? Did you get the m/c's correct first time around? I've heard that a change or two is often needed from the initial setup. Is it just an overall increase in leg pressure needed? One of the reasons I changed was that I didn't have ABS and was flat spotting new tyres. Seriously frustrating and expensive. I also started to question the PFC pads that I have always loved. I'm hoping that without the booster I can retain them.
Oh, and yes, Supercharging Rocks!
Oh, and yes, Supercharging Rocks!
Leg pressure is DRAMATICALLY increased with the non-boosted system. I believe that my setup is running 3/4 master cylinders, travel is good (2") but you have push. I am getting used to it, but it is taking time.
I'm running Hawk DTC 70 pads on the front with 275/40-17's (Hoosiers, both A and R compounds) and have not had any issue with flat spotting.
10-21-2011, 11:37 PM
#69
Rennlist Member
Interesting. My old system was pretty good except for the flat spotting. Ideally I'd like the Motorsport ABS but that's a Lottery win away. Having driven quite a few of the current crop of Porsche offerings I found that the middle pedal was very sensitive to minor variations in leg pressure. I think I'd like something inbetween DRAMATIC increase in leg pressure and over sensitive. I'm told that the feel and modulation is increased a lot with the DMC setup. I generally only drive this car in short sprint events so perhaps I won't have to build up the thighs to Olympic weightlifter class!!
