[QUOTE=John_Z,Nov 8 2009, 03:08 PM] I plan on upgrading my blower trim next year...until then this will have to do

 

He's on a Dynapack. They're notorious for high readings. I would guess he's around 450-470 on a Dynojet.

Dyno dynamics reads conservative like a Mustang. 362 HP on a Mustang dynos at 400 HP on a Dynojet. You should try dynoing on a Dynojet...you're likely over 400HP. You could also dyno on a Dynapack and see nice instant bump in HP.

I like the comparison board up above since a stock S is dynoing around 200 HP. That dyno seems about right so it's a good gauge for the rest of the combos shown.

 

Generally speaking yes, dynapaks read higher.

FYI and clarification (not another dyno war thread). John_Z and I tuned on the same Dynapak. I did a STOCK baseline of 184hp 129 tq on bisimoto's dynapak.

A year earlier I went to Church's dynapak and got 215hp 148tq.

It's safe to assume that Bisi's dyno reads closer to a Dynojet, even a mustang.


sorry for the

 

mmm...Mustang dynos are ego crushers. I doubt any Dynapack reads within 50hp of a Mustang dyno...but what the hell do I know? Bisi's might read lower than Churches Xmas dyno, but I don't think it's quite THAT much.

Look, some tuners are certainly better than others. But there's no special sauce. It's not like a good tuner who hits 400whp on a supercharger setup is going to be 100whp less than a great tuner on that same supercharger setup. It doesn't work that way. There's only so much HP to be had and so much timing you can add and fuel you can pull before running on the ragged edge of what is possible.

It's safe to say he's making well into the 400's on any dyno anywhere and over 500 on some dynos. Yes, Bisi and Church are excellent tuners. I don't think it's necessarily because of the HP they extract. I think it's more because their tunes are consistent and reliable while making good power. Same with Inline, Mase, and host of other tuners out there.

We talk of certain tuners as if they can extract unusually high HP numbers. Surely, the particular dyno used accounts for the majority of the variance between peak tuner hp figures.

 

Yeah, I was happy when I hit 360 range with the Mustang dyno during tuning session.

 

Yeah it makes sense... I was just wondering what blower he was usuing because 120 WHP is alot out of 2PSI even taking the dyno differences into account.

The dyno comparison chart above seems a little more accurate IMO. Sideways is running 4 #'s of boost more and making 25 Whp less then this dyno graph. I don't know what blower was used either im just speculating. Im at 374 at 14PSI and sideways was at 474 with 20PSI and a larger trim blower im pretty sure. Those numbers seem a little more realistic IMO.

 

Eh, I don't know that 18psi wouldnt be "safe." I could be wrong but to me 18 psi on a centrifugal supercharger would not put nowhere near the same stress that 18 psi on a gt30r turbo would put.

I am no engineer yet, but just the simple fact that with a centrifugal supercharger you are only hitting that 18psi for a split second right at redline, vs a turbo such as a gt30r will be making that 18psi from 4500-redline. Obviously the motor can take more abuse in the higher range of the powerband so in that case the supercharger would be more "reliable" than a equal turbo set-up.

Of course you have to look at the heat that is being produced by the blower pushing that much air, and not being quite as effiecient as with just 10 psi, but with keeping the heat in check I personally don't see any reason why 18psi on a blower wont be any worse of an idea than a turbo. And everyone knows there are plenty of turbo guys running 18psi on stock motors these days. Like I said I am not engineer yet, but just my opinion is that as long as heat is not much of an issue, there should be no reason why I wouldn't be able to run a lot of psi with a blower!

Any thoughts on this?

Sorry for the thread jacking.

 

I run a bead blasted 3.8" ASP pulley.

 

I'm running the stock V-2 blower on 91 pump. Keep in mind, I'm running a 2.2 and a built head that's ported and polished.

 

Thanks for the info. Yeah I'm on a built 2.2 also. I really want to step up to Novi 1200 and wanted to see what blower you were usuing to maybe use it as a comparison.