tony66

iTrader: (7)

my recently bought 2wd 3 dr is a stage 3-running level 8 ecu-greens and what loooks like a blue collins actuator-it would seem to be a collins chip looking back at the history of the car[it has a lambda sensor fitted too]
the motor is a low comp 200 series engine
it runs a lot of boost-shoots off the scale at 30psi[the max the gauge reads]
cant hear it det/pink-it runs through an amal valve not a boost controller
its got an rs500 type i/c too

now i built a 2wd sapph st3 almost 2 decades ago collins chip/greens/3 bar/green top motor it ran about 25psi...

so i suppose the question is -too much boost psi on current car?

what are your thoughts

Staffi

iTrader: (1)

No Tony, that's fine for peak boost on a T34, i run 35 psi on mine, yes that's a lot but it's when you hold them at high revs for long periods trouble can happen

tony66

iTrader: (7)

ok-thanks i dont tend to hold it flat out for long anyway
cheers for the reply

Mad_Mat

If its holding 30 odd psi on greens surely that would be boom time. Get it checked over to be sure.

Chip

iTrader: (3)

Its not too much so long as its fuelling correctly.

Get it checked on a rolling road or go up the road with an AFR gauge in it.

tony66

iTrader: (7)

well-i checked the actuator preload[collins blue one] and the wastegate penny arm is about 20mm or more from the actual actuator arm hole...

i"ve set it at just tighter than half hole pull over so will get it out tommorow for a wee test,whilst looking over it i noticed that the pipes to amal velve dont have any restrictor pills in them,not that they would be needed with the actuator wound that tight-is this still the method used for adjusting boost on amal controlled cosworths?
i"ve worked on turbo cars scince about 1985 and never seen an actuator wound so tight

tony66

iTrader: (7)

half hole gives about 22 psi-if that peak,dropping to 18/20[with amal connected]
whats the best placement for a pill>reducer amal breather,feed from turbo or to actuator,and what size generally gets used? i want around 28psi peak and that will more than likely settle at 25/6 psi
thats plenty for cutting about the roads,its wet today and 22 psi probably too much

tony66

iTrader: (7)

lol you would be as well without a wategate thats gotta be it about maxed out

col93saphcos

iTrader: (2)

Amal valve will now need jets to suit, probably try a 2mm jet think 2.5mm is standard,I used small brass screw and drilled hole down centre,
Col

tony66

iTrader: (7)

thanks for that-bumper off repairing the nearside bracket at the moment,once its back on i will go full hole preload on the actuator and see where/what to do
not looking for the fastest cossie in the world,dont want to stress it
edited to add one hole gave me 28psi held -do me nicely