I understand that eventually with enough boost there will be power gains the point I was making was that the best overall driveability seems to come from stock compression and low boost.

The ruf supercharger with lowered compression from the head gasket and more boost than the evo kit doesn't seem to make more power than the evo kit.

 

That's becuase the various components in their kit are tuned to the power level its at....now THAT kit would be hard pressed to make significantly more power than its set at. But the EVO kit uses a FAR larger & more efficient compressor capable of far more CFM's* Thats where the significant HP increase over the RUF kit would come from...

 

Ok, i just lost any minor respect i had for your "technical" knowledge on F/I....which wasn't much to begin with, LOL. The EVO blower is delivering 5 PSI of manifold pressure into the M96 motor. It is capable of delivering OVER 20 PSI of manifold pressure in the same motor, with good efficiency. I am WELL aware of what the Vortech V2 blower is capable of, I've tuned enough big inch 5.7L V8's using it at the 600++HP level and 14+ psi. A small 3.6L motor is nothing for that blower. Where the heck you're conjuring up "15+psi" from...
...like I said before, your getting senile old man...

 

I was kind of wondering that as well. A blower delivering 5 psi is deliver 5 psi, period. On vortech's site the specs of the blower say it is capable of doing far more than 5 psi so I don't see why it would be necessary to go to a different supercharger as this one seems more than capable for the application.

 

How do you know that this blower is more efficient than RUF's? I understand you might have some experience with vortech but what experience do you have with the blower ruf uses?

So the vortech blower is capable of delivering over 20 psi, the issue is how do you make the 997 motor capable of taking anywhere near this amount of boost on pump gas? Haven't a couple people said that a static compression of 17:1 can't be exceeded with pump gas?

How is it the 911 turbo guys can boost over 1.5 bar on pump...

 

i think what 1999 is saying is that the vortech is actually set to put out much more than 5psi at the exit on the blower on the 3.6 kit. i could be wrong, but i believe it has to run much higher than 5psi to account for the intercooler and plumbing losses so that it's 5psi when it finally reached the throttle bodies. i'm by no means an expert though, just the way i took it.

 

Kevin: Rather that trying to find something to pick a fight about, try openig your mind up a little. Rather that give you the reasons why the compressor is not running at 5 psi again, since I already posted exactly why earlier in this post, figure it out yourself.

You know the size of your crank pulley and the size of your SC pulley and you know your engine speed? Go to the Vortech web site and you can calculate how many rpms the blower is spinning at. Compare that to maximum speed allowed.

Then go reread my previous post and see if you can find out where the additional boost is lost. Try reading without thinking about how you can try to prove me wrong. I used to have my kids read outloud if they had trouble understanding what they read.


I find it unlikely that you have much expereience with boosting cars if you have trouble understanding this law a physics.

Dog was able to figure it out.

 

Is that like a backhanded compliment to DD, then?

 

Not really. I'm a retard

 

The point I was trying to make is that some people are just too fast to attack when they have never even read a post completely. I have done the same at times. Apparently, Keven has read a few bits of info on supercharging and will now challenge anyone who may have a different spin on what he has learned.

I clearly stated how the boost is lost going from the blower to the cylinders and most everyone understood my explaination. The fact there is a loss is not specific to supercharging but is in effect in the movement of anything in a closed system.

If Kevin had done what Dog did, and actually read the explaination, he would have come to the same conclusion as Dog as well as learned something.

 

My friend, enough is enough. You ARE an idiot! An arrogant one at that, lol. A moron with the most BASIC understanding of the concepts you speak of and write about...and then attempt to act as an authority of. A first class bull****ter basically. (just like your posts of running 11.5@121 mph in your 3.4L 996 only to NOT produce a timeslip or video for, both of which you claimed you HAD before everyone on that thread call you out on it. lol)
And now you have the nerve of belittling me on a public forum when in fact you're blatantly WRONG on the very subject you're claiming to know something about. AGAIN!

....I in FACT HAD read all your posts (including demeaning ones trying to challenge others on this forum about just about everything...the typical know-it-all-cyber-troll syndrome i call it)

Let me school you on yet another fact you have NO clue on troll...

....this is YOUR statement, "The EVO Blower that is delivering 5 psi of boost to the engine, is not running at a 5 psi compression. It is more like 15+ psi." This is ALL someone with ANY technical expertise has to read to fathom how much of an moron with no clue you are. By making this statement you are insenuating that there is a 10+PSI pressure loss across EVO's SC system. A compact system with less than 20 or so inches between the outlet of the blower and the throttle body...that's almost a straight shot into the motor. AT MOST a 2-to-3PSI pressure drop will be seen through the plumbing and intercooler of a standard EVO kit to achieve the 5PSI at the manifold, if not less. Meaning that blower is working at 7-to-8psi TOPS to see the 5PSI at the motor...WELL below the 20+ PSI capability of its Vortech V2 head unit. How do I know this *******? I've only set-up a dozen big inch (5-5.7L) V8 drag cars using the Vortech V2 blower...that head unit has NO problem achieving 14+PSI of boost *through a front mount intercooler* in a 600+HP 5.0L V8 mustang. Anything under 11-12PSI is a JOKE for the abilities of a Vortech V2 on a small 3.6L motor. PRO STOCK DRAG CARS with 900-1000rwhp and huge 4-row front mount intercoolers with long twisted intake plumbing from not having enough underhood space don't even lose 10PSI from charger to manifold!This comes from years of build forced aspirated Vortech, paxton and Procharger supercharged V8's and tuning turbocharged import cars. I have even written a thesis on "pressure drop" of various style intercoolers/aftercoolers for an automotive engineering course only to prove it on a clients car by swapping out the standard intercooler that came with the procharger kit with one I built of my own design which showed more boost at the manifold on the same pulley/compressor speed (indicating the reduction in pressure drop compared to the stock unit)...with lower IAT's to boot.

...I can't even believe i've wasted this much time justifing myself and elementary principals of forced induction to a nobody with an obvious napolean complex. Are your kids now grown and out of the house so all you look forward to in your day is getting on 6speed and acting like you know what you talking about, THEN being arrogant about what you INCORRECTLY know as fact....get a life old man.

....consider yourself lucky as I will not dignify anymore of your BS posts or personal attacks, and have wrtten you off completely. You ARE a waste of bandwidth with NO real knowledge to contribute.

---Kevin

PS: I apologize to the rest of the forum for the harsh language and tone, its not like me, but after the SECOND provocation and insult by porsche1999 I had to put him IN CHECK & illustrate how much of a baffoon this guy really is. If you take 90% of his posts seriously you have to get your head examined....who does this guy think he is!?!?

 

So, I guess anyone who disagrees with you and proves you wrong with FACTS, is arrogant? So I don't waste too much time trying to educate someone who obviously has no interest in learning, I will point out one more fact and ask a question (to which I do not want a reply).

Fact: A crank pulley 6 inches in diameter turning at 7300 rpm that drives the Vortech V2 with a pulley 3.6 inches in diameter, casues the V2 to rotate at a speed greater than 43000 rpm. That produces about 6 psi of boost to the cylinders on the EVO system. At this speed, the V2 is running at more than 86% of maximum speed.

Question: If 86% of the V2's speed generates only 6 psi, how does the remaining 14% generate another 14 psi?

If you want a serious discussion about these facts of physics, that is fine. But to stomp your feet and start screaming simply because someone corrected you, is pretty pathetic. But this is the day ofthe internet and I guess even the uninformed can post whatever they want.

Challenge: If you can get the EVO system to deliver 20 psi to the cylinders without exceeding the rpm limit of the V2, I will pay for your system.

 

oh my god....*sigh*...another one of your "FACT's" lol....please do me a favor, do not post a comment or reply to any one of my posts again...your attempt at "tech-talk" is truly whats "pathetic..."

---Kevin

PS: (don't reply) I'll one up your challenge with an actual SC'ed 470++RWHP daily driven 3.6L 996 on pump fuel.

 

I want to see the claimed 11.5 @ 121 slip... then he has credibility. Until then, I'm running 10.2 @ 140 just to let you guys know, on foot, carrying an evo supercharger.

 

ROFL !!! ...sticky, if this guy produces a timeslip for an 11.5@121mph with the supporting video he claimed he had I will be the first one to publicly commit to WIRE TRANSFERRING $100 to him personally! It ain't gonna happen boss....