cam gear settings
#106
EvoM Guru
iTrader: (6)
Install cams and injectors at the same time. So long as your starting scaling and latency settings are fairly close, the car should run fine at part throttle, closed loop.
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
The resources I use when it comes to cam timing are twofold, the 25 years of experience I have with cam tuning, and the EVO cam timing tuning experiences to which I've witnessed and contributed here. There are some cam sets that need help with the cam timing (e.g. HKS), and others that are timed to settings that consistently give strong all-around performance (e.g. GSC, Kelford) for most applications.
Here is some worthwhile reading for those who want to learn how camshafts really work:
Engine Camshaft Basics - David Vizard
Lobe Centerline Cam Science - David Vizard
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
The resources I use when it comes to cam timing are twofold, the 25 years of experience I have with cam tuning, and the EVO cam timing tuning experiences to which I've witnessed and contributed here. There are some cam sets that need help with the cam timing (e.g. HKS), and others that are timed to settings that consistently give strong all-around performance (e.g. GSC, Kelford) for most applications.
Here is some worthwhile reading for those who want to learn how camshafts really work:
Engine Camshaft Basics - David Vizard
Lobe Centerline Cam Science - David Vizard
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VictorGarage (May 24, 2019)
#107
Install cams and injectors at the same time. So long as your starting scaling and latency settings are fairly close, the car should run fine at part throttle, closed loop.
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
#108
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Hi Ted,
Recently I changed motors as my original one got a little tired. The old motor pulled well and made 255awkw.
We dyno'd up the car with the new motor and only made 245awkw with a chunk of midrange missing from around 3500rpm to redline. Total difference, 10awkw evident through the midrange to topend looking at my dyno charts.
I have a strong feeling its to do with the cam gear settings. I wasnt too sure if they were adjusted previously on the old motor when we ran 255awkw. My previous tuner claims they were, however the cam gear settings were now 0,0 when installed in the new motor when it ran on the dyno.
It would be appreciated if you could advise some optimal starting point settings to bring back my midrange to topend. Really miss it!
Vehicle: Evo 8 2L Stock build with ARP head studs non Mivec
Mods: E85, 260deg Tomei Poncams both In and Ex, Tomei adjustable cam gears In and Ex, Evo 9 Turbo, 24psi
Thanks in advance
Recently I changed motors as my original one got a little tired. The old motor pulled well and made 255awkw.
We dyno'd up the car with the new motor and only made 245awkw with a chunk of midrange missing from around 3500rpm to redline. Total difference, 10awkw evident through the midrange to topend looking at my dyno charts.
I have a strong feeling its to do with the cam gear settings. I wasnt too sure if they were adjusted previously on the old motor when we ran 255awkw. My previous tuner claims they were, however the cam gear settings were now 0,0 when installed in the new motor when it ran on the dyno.
It would be appreciated if you could advise some optimal starting point settings to bring back my midrange to topend. Really miss it!
Vehicle: Evo 8 2L Stock build with ARP head studs non Mivec
Mods: E85, 260deg Tomei Poncams both In and Ex, Tomei adjustable cam gears In and Ex, Evo 9 Turbo, 24psi
Thanks in advance
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Panosevo (Aug 8, 2024)
#111
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Location: Ogden UT
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hey ted
just ordered a set of GSC 274/274 S2 cams. I know i will loose some spool up but i would like to know what settings you would recommend for my set up?
set up:
05 VIII
upgraded springs/retainers/lifters
ported head
+1mm oversized valves
hks cam gears
arp head studs
act clutch and light weight flywheel
ams IC and piping
hks intake
invidia TBE
255 walbro
spark tech CDI COP
still on stock VIII turbo with 10.5 hot side (will upgrade soon)
AEM EMS
just ordered a set of GSC 274/274 S2 cams. I know i will loose some spool up but i would like to know what settings you would recommend for my set up?
set up:
05 VIII
upgraded springs/retainers/lifters
ported head
+1mm oversized valves
hks cam gears
arp head studs
act clutch and light weight flywheel
ams IC and piping
hks intake
invidia TBE
255 walbro
spark tech CDI COP
still on stock VIII turbo with 10.5 hot side (will upgrade soon)
AEM EMS
#112
Evolved Member
iTrader: (11)
Install cams and injectors at the same time. So long as your starting scaling and latency settings are fairly close, the car should run fine at part throttle, closed loop.
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
The resources I use when it comes to cam timing are twofold, the 25 years of experience I have with cam tuning, and the EVO cam timing tuning experiences to which I've witnessed and contributed here. There are some cam sets that need help with the cam timing (e.g. HKS), and others that are timed to settings that consistently give strong all-around performance (e.g. GSC, Kelford) for most applications.
Here is some worthwhile reading for those who want to learn how camshafts really work:
Engine Camshaft Basics - David Vizard
Lobe Centerline Cam Science - David Vizard
I like the timing of the GSC cams and don't really have any 'magic bullets' for alternate settings. You may find a little more peak power with the intake cam retarded maybe 1-2 degrees, but it may come at the expense of midrange and spool.
The resources I use when it comes to cam timing are twofold, the 25 years of experience I have with cam tuning, and the EVO cam timing tuning experiences to which I've witnessed and contributed here. There are some cam sets that need help with the cam timing (e.g. HKS), and others that are timed to settings that consistently give strong all-around performance (e.g. GSC, Kelford) for most applications.
Here is some worthwhile reading for those who want to learn how camshafts really work:
Engine Camshaft Basics - David Vizard
Lobe Centerline Cam Science - David Vizard
David Vizard is the guru on small engine tuning...Great source and reference.
#117
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hey Ted,
whats the best setting for all around performance out of Kelford 272? I tried +2/-2, and was having a hard to set the idle.
set up:
EVO 8 2.0L
+1mm oversize valves
Full Race TS HTA86 1.04 AR T4
Ported Intake mani + 65mm TB
Double pumper
1000cc injector
whats the best setting for all around performance out of Kelford 272? I tried +2/-2, and was having a hard to set the idle.
set up:
EVO 8 2.0L
+1mm oversize valves
Full Race TS HTA86 1.04 AR T4
Ported Intake mani + 65mm TB
Double pumper
1000cc injector
Last edited by gepzz; Feb 14, 2011 at 03:27 AM.