see happy juice recipe in my sig.

 

Okay. Then let's have everyone do a dyno run on the same dyno, with the same fuel, at the same altitude, with the same size/weight wheels, at the same temp, at the same humidity level. There are SOOO many variables. NZ has this setup as fair as can be. No more arguing about it.

 

Opps didn't see that moderator shut down... I politely agree to disagree.

I did different boost level runs yesterday because I wanted to see what I was putting down at the different boost levels I run at events.

At 16 psi it was 335
At 18 psi it was 375

After tuning the 18 psi run I saw I still had room for more fuel because neither my MAF nor my fuel pressure/injector duty cycle were maxed. So I cranked up the boost to 21 added some fuel and did the two glory runs I posted here. There was room for a little more, but I had already hogged 6 runs at a club dyno day so I bowed out and allowed others their time on the rollers. My max stands at 395.4 rwhp.

 

Isn't this a discussion forum???? Why is this this discussion over??? I noticed a few curse words, which I thought were not acceptable, but this is only a discussion with different opinions.

As far as I'm concerned, boost is obviously important, since most of the turbos used in the top 10, are still efficient above 20psi....

 

I Think Ted is heading off a problem at the pass. He made a good point in his last post.

 

that doesn't equate, have somebody do a 25psi run on their k26/6 equiped car and if it doesn't blow up, there is a good chance it will actually make less hp than it would a lower boost setting because of the extra heat. as has been mentioned ad-nauseum not every car is capable of running 25 psi. that's what tuning is about, if i have my car properly setup to run 25 psi and joe blow doesn't and can't match my hp numbers, then tough sh*t for him.

 

Thank you Shaheed. Some of these guys are reading too many magazine articles written by dumb-asses.

 

Shaheed

I was not suggesting that guys with k26 can be compaired to guys who are running with the mods of a car like ST or Rolex, Defastest and so on. If you take a look at the mods on these cars nobody is using a k26 it's all to4e with what every trim they are using. Like i have said before with all mods being close to one another there is a big difference from 18-psi to 25-psi lets all do a pull in the same psi ballpark. Then you will have a more accurate comparsion.

 

Accurate comparison of what?
What are we really trying to judge here? (might as well get out a ruler and start measuring….well, you get the idea).

Lets get to the root of question – what are we really trying to quantify here – here is the list of variables that engine builders / tuners have to choose from –


Modification to Displacement
Modification to flow efficiency (head work, exhaust and intake work)
Turbo selection (select for efficiency range and spool up characteristics)
Fuel mixture (A/F ratios)
Ignition Timing
Fuel Type

If you want to make this an interesting intellectual pissing match then we need one more piece of info – Fuel flow. If we had the required info then we could calculate out the efficiency of each configuration and that would tell us a little more about which engine was ‘tuned’ the best. That would be a good comparison of tuning.

Just my 2 cents

Chris White

 

Chris White

The whole point i was trying to make was boost does make HP.
Let's take you're car as example you got 370 WHP at 19-psi a little more of tuning to crank boost to 25 psi and what do you get More HP right?

You said accurate comparison to what, boost for boost. Not to many guys making high hp have stock head or turbos. If my menory has not failed me when Rage got his high HP it was done with nothing more than a big turbo stock headers stock head, exhast? SDS system crank up the boost and well over 400 to the wheels so boost does make a difference regardless of all else.

 

people use different approaches to making power. they are also using different components. why limit everyone to running the same boost? maybe someone's turbo is not in it's ideal efficiency range at that boost, of course they won't make optimal power then. these cars aren't carbon copies of each other, why try to "test" them as if they are?

 

I think I understand what PK951 is trying to say... a 25psi run, should not be compared to a 18psi or 15psi run. Obviously , the higher the boost, the more power you will make with these top ten listed cars, since they can all probably yeild more power with higher boost...

How many 951's are running 25psi all day, as daily drivers or at the track?????

What I think is impressive ...is high TQ and HP numbers at reasonnable boost levels (15psi-18psi)...that can actually be used all day long...not just for 1 dyno run..

 

I daily drive my 951 a 400+ miles per week. I run AT LEAST one full tank of race fuel once a week on the street. 23-24psi (I will never run 25 psi because my gauge only reads that and I am afraid if I was overboosting I would not be able to tell.)

 

$50 for a new gauge will take care of that problem

 

The facts:

The man who won this year's Sebring GT3 ENDURANCE race was running VERY high boost.

Making excuses for a poorly selected/outdated (by 15 years) turbocharger won't do in 2005.

Running high boost is MUCH easier on an engine than running high revs.

I have NEVER, EVER had a meltdown on my engine and I run more boost than ANYONE on this board. I know some people who shun high boost here - but their own engines have melted down NUMEROUS times!!!!