yes, i get about 1.5 to 2 psi per 1000 rpms on any of these setups....

 

Many forget to include the 20-25 HP the supercharger consumes and subtracts from RWHP in their fuel calculations.

 

Hey, I am on the opposite side of the country to Brisvegas! When are you heading there? I should fly you over to WA (4.5hr plane ride) to tune my car at my mates dyno I will buy both pulleys off you and see how it goes

JK

 

Here's a call to those that do this everyday: look at the details and suggest what is wrong by what you see, both the AFR and psi. Notice the boost drop at 6200RPM to 6500RPM. That cant be right. The belt feels tight as hell on the car. Also the AFR. If its not ideal for this engine, say so as the techs that will be working on her will see this forum as well. They may not specialize in nissan/infinity, but the specialize in high HP superchargers and turbo cars, and i TRUST them. That's the part that is tough. Here in Vancouver you cant throw a rock without hitting a shop that will work on it, but not many that a re good, and even less that you can trust.

 

There is no boost curve in any of thoughs charts . But you get pretty rich after 5500rpms

 

There is a boost column showing the given psi at a given RPM. I suppose that that should be a linear line, as boost is a function of RPM. That is my main concern, as if boost raises at a fixed ratio to RPM with my stock 3.33 pulley, then there should be no boost decrease from one RPM to the next, it should be a consistent increase until 6500PRM. I actualy loose boost after 6200. Being technical enough to undertsand plausable scenarios, at about 6.4 psi, wherever the leak is gets bigger at that point and boost drops(keeping in mind that there is a leak the whole time)........or after 6200 RPM the belt starts to slip. But I dont think its belt slippage, as there is no way that I can make up 1.6 PSI in 300RPM. Just thoughts anyways.

 

OK sorry....I didnt move the page over to see boost column . My best guess is you do have a leak in the plenum area . So the reasons for less hp than normal...are for sure that you are to rich after 5700rpm and more than likely a boost leak from the plenum gasket area . I bet if you get thoughs two things fixed. You will be in the 340 to 360whp range and making 7 to 8 psi.

GOD LUCK !!!!

 

I'm sorry if someone already noticed this, but why does it say "Drive Ratio = 4.680000000" on that first attachment? Is that the final drive ratio in metric? I'm going brain dead right now and can't seem to remember. . .isn't a ratio a unitless number? Specifically for Final Drive, "number of shaft rotations per number of wheel rotations?" I'd think units wouldn't matter then. . .

Anyways, I remember hearing that if the Final Drive ratio isn't set correctly, the numbers will be thrown off.

 

I would ignore every other piece of info on my dyno graphy except HP and torque. The rest is fairly irrelevant

JK

 

it was a vortech s/c 350z.. he said it made 370bwhp

 

What SHOULD my AFR by at redline? My details show what I have had set in the Split Second box, give me some input so I can pass it on to the guys at Brown Brothers so I only have to have it in the dyno once more.

Who sells the pully system that I can add to prevent belt slippage? I need one of these asap...

Thanks for all your help.

 

Any updates?

 

I will scan the new sheets when I get set up, just moved this past weekend.
Took the car back to Brown Broothers, they went over everything, replaced the main drive belt, rebuilt the BOV and retorqued the plenumk spacer.....it was all of the above. I now have 340rwhp, which calculates right out to 470bhp which is about what Vortech said I should have with the spacer. I have 7.5 PSI at redline, and the .5PSI drop is from the spacer, but power is right.

I will get the new dyno graph and details posted soon. Thanks.

 

Good god man your all the way in orlando! Anyone good in Illinois?

I want those results with my RevUp, and good tuner before i take the plunge.

 

So, after installing the standard vortech kit, will the default SS box be ok (with the stock pully)?

I am doing all my research now for a vortech. I would like to do that sometime. I am in Iowa, so I need to figure out if I will need to find a tuner (with awd dyno) or not. Assuming I have no leaks or issues, is the default map too rich to make advertised power? I am going for safety over power, but running too rich can be bad also right?