143 replies to this topic

[CHILL Gone DUTCH]

forgive me if im wrong martin (oakmere) but wouldent the duration be higher at 0,05 rather than 0,039

[oakmere]

Not the way I was looking at it but could be wrong. Std 2.2 cams: 245°@9.5 245°@9.5 Standard GM So your cams should give good power gains!

[oakmere]

If you look at the chart you posted, you will see they have duration specs at .006", .050", and .200". If you added in another column showing duration at .039", you can see that the duration would be higher than it is at .050". In this case, it is about 6 degrees more at .039"(1mm).

[Graeme Lambert]

Makes no odds to me at the moment, mine still show as being somewhere around the Chicago sorting facility...

 

Status hasn't changed since 11th Dec :S

[Bargi]

what if I get Stage 3 cams?

 

will my engine lose power?

 

edit: sorry I'll get my coat

Edited by Bargi, 17 December 2013 - 09:48 PM.

[Exmantaa]

LOL The confusion...  

 

 

[MartinS]

So do I continue the conversation with zz or are we happy these are stage 2. Has no one else recievd theres yet?

 

Martin s

 

[CHILL Gone DUTCH]

They are what they advertise on site Mine have been in uk for nearly a week and still not delivered ??

[Graeme Lambert]

They are what they advertise on site Mine have been in uk for nearly a week and still not delivered ??

 

Whereas mine are still showing as in chicago. ZZP told me that they often take 2 weeks to show as being in the UK due to the USPS tracking system so I'm not unduly worried yet. Weird yours show as being in the uk though.

 

G

[Exmantaa]

You guys ordered ZZP stage 2 cams and received ZZP stage 2 cams, so what's the fuzz about?   

Confusion comes from comparing the ZZP spec sheet (@1mm lift) with the durations listed in the Comp Cam grind sheets (@0.050" lift).

 

As said here, the difference (or suitability for your particular engine/driving) between ZZP LSJ St2 or the Comp Blower cam set is a different discussion altogether (and a bit late after ordering all the cams... )

[Graeme Lambert]

Yup ZZP say:

 

"-The Stage 2 cams are the next step, they will raise your powerband about 700-1000rpm, they will make peak power around 7500-7800rpm!  They will require an ATI balancer to help reduce engine vibrations at the new high RPMs."

 

How high are people planning to rev their engines? I'm certainly expecting to stay below 8,000rpm.

 

G

[techieboy]

I'm still more worried about the base circle diameter problem you mentioned elsewhere. Given the fact my cams have been sat in the garage in their boxes for the last 13 months.

[FLD]

I'm still more worried about the base circle diameter problem you mentioned elsewhere. Given the fact my cams have been sat in the garage in their boxes for the last 13 months.

 

[CHILL Gone DUTCH]

Yup ZZP say:   "-The Stage 2 cams are the next step, they will raise your powerband about 700-1000rpm, they will make peak power around 7500-7800rpm!  They will require an ATI balancer to help reduce engine vibrations at the new high RPMs."   How high are people planning to rev their engines? I'm certainly expecting to stay below 8,000rpm.   G

That will be against the standard cams not the z22se

[Graeme Lambert]

 

I'm still more worried about the base circle diameter problem you mentioned elsewhere. Given the fact my cams have been sat in the garage in their boxes for the last 13 months.

 

 

 

Errrr i may have missed that. whatnow?

[FLD]

A few of us bought some comp cams a while ago and may suffer from a duff batch that were made.  The duff batch have a larger diameter base circle so hold the valve open a touch all the time.  This causes rubbish running.  Base circle should be 30mm IIRC (see Joes adventure no 2 project thread)

[techieboy]

Errrr i may have missed that. whatnow?

Shouldn't affect you, as you've got (presumably) cams from the latest production run. Exmantaa was saying (in Joe's thread) that 12-18 months ago, CompCams manufactured a batch of incorrectly sized cams that prevented the valves fully closing.

[Graeme Lambert]

 

Yup ZZP say:   "-The Stage 2 cams are the next step, they will raise your powerband about 700-1000rpm, they will make peak power around 7500-7800rpm!  They will require an ATI balancer to help reduce engine vibrations at the new high RPMs."   How high are people planning to rev their engines? I'm certainly expecting to stay below 8,000rpm.   G

That will be against the standard cams not the z22se

 

 

So in otherwords these will be slightly better rather than massively better than the Z22se cams?

 

 

 

Errrr i may have missed that. whatnow?

Shouldn't affect you, as you've got (presumably) cams from the latest production run. Exmantaa was saying (in Joe's thread) that 12-18 months ago, CompCams manufactured a batch of incorrectly sized cams that prevented the valves fully closing.

 

 

Ok, thanks for clarifying guys.

[techieboy]

So in otherwords these will be slightly better rather than massively better than the Z22se cams?

No idea what the specs are for standard Z22SE cams or for that matter B207R cams and B207whateverthefcuk cams you've already got in your new engine.

[Graeme Lambert]

 

So in otherwords these will be slightly better rather than massively better than the Z22se cams?

No idea what the specs are for standard Z22SE cams or for that matter B207R cams and B207whateverthefcuk cams you've already got in your new engine.

 

 

fcuk it, they're shiny and new, and cost a lot of money. Job's a good 'un!