Bomber Carnage on the Garage Floor Legacy Donating Member 3,994 Member For: 16y 4m 10d Gender: Male Location: Gold Coast Posted 10/06/14 10:16 AM Posted 10/06/14 10:16 AM ^^^ yep, why I ruled them out too. What happened with the Atomics?
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 10m 25d Gender: Male Location: Perth Posted 10/06/14 10:17 AM Posted 10/06/14 10:17 AM (edited) What other spring company endorses smoking??????????? Crow for the win. Edited 10/06/14 10:18 AM by arronm 4
Bomber Carnage on the Garage Floor Legacy Donating Member 3,994 Member For: 16y 4m 10d Gender: Male Location: Gold Coast Posted 10/06/14 10:27 AM Posted 10/06/14 10:27 AM ^^^ haha. Like that.
LU82 Legacy Donating Member 569 Member For: 13y 7m 27d Posted 10/06/14 10:35 AM Posted 10/06/14 10:35 AM OEM valve springs have approx 50 psi seat pressure, once 15 psi is added to this equation (which acts against the valve spring), approximately only 35 psi seat pressure is left. This is nowhere near enough to keep the valves shut at high rpms 85-90 psi installed height of the new springs, some 75% more stiffness Highly recommend for 320+rwkW applicationsPulled off the plazmaman site .
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 10m 25d Gender: Male Location: Perth Posted 10/06/14 10:46 AM Posted 10/06/14 10:46 AM Which is robbed from Brad at Atomic 2
JETURBO ...JD TUNING ADELAIDE... Legacy Donating Member 23,708 Member For: 18y 3m 21d Gender: Male Location: Adelaide Posted 10/06/14 10:49 AM Posted 10/06/14 10:49 AM We used alot of plaz springs for boost target pressures 18psi and lower and for big stuff crow and retainers and very happy with our choices for our end users with not one issue The PAC springs do look like a great choice though and cover a good spread of psi range 1
bjacobs Member 143 Member For: 12y 9m 30d Gender: Male Posted 10/06/14 11:04 AM Posted 10/06/14 11:04 AM OEM valve springs have approx 50 psi seat pressure, once 15 psi is added to this equation (which acts against the valve spring), approximately only 35 psi seat pressure is left. This is nowhere near enough to keep the valves shut at high rpms 85-90 psi installed height of the new springs, some 75% more stiffness Highly recommend for 320+rwkW applicationsPulled off the plazmaman site .I saw this, was just exhausting all options, just bought a set of PAC springs so hopefully they go well!Sent from my iPhone using Tapatalk 1
LU82 Legacy Donating Member 569 Member For: 13y 7m 27d Posted 10/06/14 11:11 AM Posted 10/06/14 11:11 AM Yeah the pac ones look like a good option.Plazmaspring and precision 6235 going on this week so hopefully they last for a while. 3
MattyP MattyP Legacy Donating Member 6,317 Member For: 14y 4m 17d Gender: Male Location: Central Coast Posted 10/06/14 11:32 AM Posted 10/06/14 11:32 AM As always LukePics!! 1
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 10m 25d Gender: Male Location: Perth Posted 10/06/14 01:08 PM Posted 10/06/14 01:08 PM Crow valve springs with Crow retainers are not a good combination. There is known issue with them, to get the correct spring pressure they have recessed the collets further down into the retainer. This is a big issues on the exhaust side as the valve stem is slightly shorter which brings the retainer higher which then makes contact with the rockers arm. I have called them about this and they played dumb. Have seen this so far on 7 engines so far.The crow retainers sit higher to allow a greater installed height, for high lift cams. It has nothing to do with correct spring pressure.But I agree the photos you show dont look good. I better keep an eye on mine
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