That does seem pretty definitive.

You have an air to air conversion and are only at 420whp? Dont get me wrong, gaining 100whp is nice from that plus tune but why so low? Did you just want safety?

We call Vortech and asked about the smaller pulley for more boost and they didnt recommend it as they said Stillen supercharger is pretty much at the max RPM they recommend , also its on crap Ca 91 octane

I was thinking about doing the exchange plan Vortech has but i dont know how much longer im gonna keep the car

So to answer the question , yes safety

Yeah, they didn't design it to take more heat than the 8psi so I can see that. You can get the9psi from concept z for half the price anyway fyi.

Got a link or part number?

Also will it need a tensioner or how does it cover the belt slack ?

conceptzperformance.com/stillen-407737-13-supercharger-system-pulley-9lb-nissan-370z-09

It doesn't "need" an extra tensioner. However, there will be some belt slip in higher range. Nothing terrible but you can eliminate it and pick up an extra psi from adding the extra pulley. See mod in my thread starting around page 66 or something.

Ok sorry it took so long to post my data, but was busy with family events. Anyway, after extensive searching of information on the internet and some quick post-processing and comparing my "Street" run and the "Dyno" runs I believe the issue is the Dyno operator didn't load the rollers with enough resistance to allow the SC to kick in to it's full potential.

Can someone confirm or second my hypothesis?

Attached you should find links to a street run and a dyno run along with some pics of the post-processing and data comparisons. A few words about the data...
- All the "Dyno" runs showed the same trends and characteristics among them, so which one I used to compare is irrelevant.
- The one "Dyno" run was on a 0-60 log so it stopped logging around 63mph
- I removed data before the starting (2500rpm) and after letting off WOT.
- The data is not my post-processed, so it's raw dump values.

Pic Info:
- I post-processed data so all the graphs, the X-AXIS IS RPM...not sample! So all graphs data element is function of RPM.
- The graph titles tell you the Cypher data elements, the graph legend will tell you which color is street and which is dyno.
- The side-by-side AFR and Base Fuel Schd plots are comparing Street vs Dyno within each graph and comparing the two side-by-side graphs shows consistency among different (bad) Dyno runs.
- The pic of four shows various data elements comparisons of Street vs Dyno.

https://drive.google.com/open?id=0B1...zltQnVaRDBmRm8
https://drive.google.com/open?id=0B1...EtzMzFtYkp4cU0
https://drive.google.com/open?id=0B1...E0yT195WkhCWHc

Ugg...forgot how to get pics in...and my attached files didn't seem to show up anywhere...trying again...

Pics:
https://drive.google.com/open?id=0B1...zltQnVaRDBmRm8
https://drive.google.com/open?id=0B1...EtzMzFtYkp4cU0
https://drive.google.com/open?id=0B1...E0yT195WkhCWHc

Data Files (csv):
https://drive.google.com/open?id=0B1...UJqTmRKUlQ1M3M
https://drive.google.com/open?id=0B1...XdRUUNIZkc0aFE

Does anyone with dyno experience know what happens if a SC car is run without tension on the dyno pulleys? How much tension is necessary for SC'd pulls? Does anyone know what cpuld cause the graphs to produce drastically different response? e.g. AFR delays to increase and doesnt increase as high.

/Z/

Any belt slip, clutch slip, that sort of thing?

An eddy current dyno should balance the load automatically so that itself shouldn't be an issue.

No clutch slip, but I'm not sure what SC belt slip feels like. I did not change the SC belt tension as stillen ships it tensioned appropriately. I checked the tension of the SC belt and it seems faily taught.

Dyno was a Dynocom FX7500 with 24" Rolls with a Frenesla Eddy Current.

Have you thought about finding a local Dynojet and getting a run on it to check if this is all due to the first dyno being set up wrong before you go to a lot of effort to figure out if something's mechanically wrong?

My mechanic said he would do a smoke test on a Saturday, just need to supply a case of beer. But with weather getting cold, snow showers, and salted roads, I think my car is on hold now. Either way the smoke test turns out I will be doing another dyno, but if the smoke test turns out fine...I won't be going to the same dyno again! I found a place about an hour away, R/T Tuning...might give them a try.

When I do the smoke test and re-dyno I post my results and findings.


/Z/

Imazman,
Talk to Vince at R/T Tuning.

I'd just go straight to Vince at R/T. Guys know what they are doing.