Fabio421

I disagree that he isn't peddling anything but that's not really important. To be clear, I'm not asking that he be asked to leave or to stop posting. I'm just surprised that it's been allowed. Think back to the past and ask yourself if this would have been allowed. I don't think it would. Hell, Randy used to delete my posts mentioning John Kuhn or turbo's in general just because John wasn't a site sponsor. All I was doing was discussing it as well. Randy felt like I was more than a fan of his work. I'm not. I think these discussions are very helpfull for all involved.


Which one is it Victor? Is it 180HP, 150HP or is it 130 HP? Is it 6 or 7 psi?

victor25

Cosmo

Hmmm... you are right my frined. That doesn't add up does it?? I can't argue with that simple math!!

victor25

Jim
Sorry but I don't have the formulas. I called my Rotrex guy and asked about efficiencies, he then asked me a bunch of question like, what is the crank pulley size, and what size pulley was on the Rotrex, whats the engine size, etc, etc... Then he started giving me a bunch of info and I wrote down as much as I could. I will get him to email me the formulas & numbers he was using. That way I can give them to you and you can run all the numbers.

Fabio
I simply just cant give a solid number. I cant say every single car is going to make the same HP, or Boost, or whatever. There are too many variables!!! Is someone using one filter under the hood or two in clean air, is it Cali water gas or Michigan gas permium, are you in LA at sea level or in Denver. All I know for sure is that when you put a Rotrex kit on your Porsche 928, you will get boost and you will get more power.
Every stage 1 kit that has been installed so far has taken the MAF up to 100%. And I believe we are all in agreement that 100% on the MAF can equal 450CHP. Now like I sad before, there are variables!! temp, tune, belts, exhaust, that can all have an effect on the individual cars output. This is why I sell stage 1 with an 80mm pulley. It takes you to that point, and the individual can take it form there. That is the point where everything still seems to be OK.

Speedtoys

As I see it.

326chp = 270-275rwhp on an automatic.

Fact: Ive dyno'd 288rwhp on a Dynojet 224 AND a Dynojet 424X on the same day. (after sharktuning and a few mods)

Fact: I just laid down 370rwhp @6.8psi on the same 224, which..is whut...450chp? On an 80mm pulley. Larger than his 75mm (lower boost).

I can demonstrate 450chp from ~326chp...considering you would...SHOULD..have a good exhaust and a few other things including decent sharktuning to own a forced induction kit anyhow.


Not sure if SeanR has hit the rollers yet.


Edit: Of my 6 pulls yesterday, peak boost was anywhere from 6.8 to 7.7psi..hotter runs appear to have given less boost I think.

SeanR

I have not, but rest assured, when I do this place will know about it.

Courtshark

Laying down power like that is great, but it also has to be smart power that lasts. By that, I mean power that isn't creating other issues, like a heat spike that causes predetonation. I think intercooling or water injection of some kind would be wise based on what I've seen so far.

SeanR

Mine is not tuned to the extent it can be but the last few data logs I ran for Victor and a couple of others, my knock counts on a 2nd gear through 3rd gear redline were seven (7 knocks) on both runs. Which means I can add some serious timing for more power. Those runs were last week when it was almost 100f here in Texas and my "air filter" is behind the radiator. I'm waiting for the new intake before i get in to it hard on the tuning.

I've kept it very conservative since this is my daily driver and I'm sure Victor is thinking I'm a ***** for not going more aggressive in either tuning or running. Don't want to. I want my car to last a long time.

So far, I'm not needing any intercooling. Will I? Yes, but not in the form these guys are going, I'll be adding meth injection after seeing what it is doing on our two turbo cars here. Does Victors air to air IC work? Yes. Will it work for someone else? Yes. Will my car see hundreds of hours on the track....hell no, I'm stoplight to stoplight. My car won't even see a drag strip. The power is there for when I feel like being Billybadass for all of 5 seconds.

More updates or pure BS to come I'm sure. Enjoy the thread and please keep it civil.

victor25

I absolutely do not think your a p---y. I think your smart to play it safe!! Personally I would like to see 0 knock counts, but I know realistically you will see a few hear and there. I run my advance in the low to mid 20's under full load @6000 rpm, and do not see any knocks unless the MAF goes past 100%, and then it's only a random few. But then it's only like 70deg here...haha

Cosmo Kramer

I would keep the "chp" figure out of the equation as we have no real way to measure it in our cars and figuring out parasitic loss is a guess at best. Your N/A dyno run was 288 rwhp. Your supercharged dyno run was 370 rwhp. This is a net gain of 82 rwhp from 7 ish psi or about 11.7 hp per psi of boost.
One thing about supercharging the easy part is bolting it on the real work is getting it tuned!

Speedtoys

Yup..gettin there.


Slow changes, logging, observation.

rgs944

I took my car to full boost this weekend for the first time. When you get to 6000rpms it is quite a push. I am not really worried on getting everthing perfect with a lot of tuning but it is fun to learn from those of you that do.

Speedtoys

Without a sharktuner, you're nowhere near it..probly..and there's always a chance you're slowly re-distributing aluminum around your combustion chamber, too.

rgs944

My SC was installed with a sharktuner. I would have never done otherwise. Just because I am not going for maximum power by going to a dyno does not mean I am not worried reliability.

Speedtoys

Cool..wasnt sure what work you did map wise...just knew you didnt have dyno data.

Speedtoys

It just hit me..

How much more fun it will be on the 16" manhole's with the SC this winter. (no snow, just cool/cold, rain)


+928