neilo

Thanks for the reply Risking, I'll take on board the advice with the vacuum regulator blead, as you said better to sensor the vacuum where it's at it's greatest. Do you also run your blead off the -6 fitting coming out of the dip stick hole? or off the cam covers? What size is the hole in your blead pipe -2 ? My pump is a 3 stage Titan pump which has 2 scavenges in the sump and 1 pressure, i have a -12 feed and 1 X -16 return. In the circuit race series i'm building my car for we have to run a catch tank the same litres as the engine so i have to run a 3ltr catch tank, would you just vent the tank with a small filter on the top like all other dry sump catch tanks not vent to atmosphere like a convetional wet sump system? My system hasn't run yet but as always trying to do it right, what i don't know is weather my current 17litre per 1000 revolutions is enough with 2 scavenges or weather it would be better going with the same 2 scavenges but have larger gears giving 27 litres per 1000 revolutions or just add another stage giving 3 scavenges? Do you have any pictures of your vacuum blead and rocker plugs Risking? I use gts cam covers on my gtr though. Thanks for any help.

Cheers Mike any info is appreciated. The 3 stage Titan pump i have can be geared to 17 litres per 1000rpm or 27 litre per 1000rpm it would be good to compare to what others are using. I take it the peterson valve you are going to use is the filtered one which can be set to control the amount of vacuum you want? Have you or anyone else thought it necessary to run a perterson inline pop off valve from the cam covers back to the tank to control any possitive vacuum? Cheers Neil

Mike, what type of valves do you use off your cam covers? and how many litres per 1000rpm does your pump produce? Cheers Neil

Hi to everyone on the SAU. I've found this thread very interesting on dry sump systems as i'm currently build my R34gtr race car in the uk. My question's are to Risking and anyone else with some good info. How many litres per 1000rpm would you need from your scavange pumps to acheive 8" to 12" of vacuum? Would you say it is better to run the returns individually back to the tank rather than to manifold all the scavange returns back in one hose? What would you say is the ideal hose size? -12 feed and -16 returns Thanks in advance Cheers Neil