Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

16V L-Jet supercharger updates? Anyone?

Thread Tools
 
Search this Thread
 
Old 11-18-2004, 09:16 PM
  #46  
Tim Murphy
Addict
Rennlist
Site Sponsor

 
Tim Murphy's Avatar
 
Join Date: Jan 2003
Location: Green Bay Wisconsin
Posts: 951
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Quick Carl
Are you waiting for me?

My appointment at the Dynojet Dyno is at 1:00 tomorrow (Friday 18th)
with the supercharged L-Jet. I will post chart and air/fuel info.

I have had her out on the backroads today and I think I have the air/fuel tuned in pretty well. She stayed nice and on the rich side of things thru 8 psi at 6000 RPM. This observation is just by the air/fuel gauge inside the car. Tomorrow I will have numbers.
Good job Carl! There is no subsitute for following through with what you say you are going to do by doing it.

Last edited by Tim Murphy; 11-19-2004 at 02:23 PM.
Old 11-19-2004, 11:52 AM
  #47  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

LOL Z you're too funny

You use copyrighted material in malicoius fashion towards the creator in public to purposefully misguide others. No wonder you won't reveal any part of your name. BTW do you still own a 928? I am thinking you sold it for some reason.

and the credits read:

Mark R Vortech System Conception Design and Creation (only to be stolen)

Andy K
Old 11-19-2004, 02:42 PM
  #48  
Carl Fausett
Developer
 
Carl Fausett's Avatar
 
Join Date: Dec 2001
Location: Horicon, WI
Posts: 7,005
Likes: 0
Received 60 Likes on 44 Posts
Default

my .02 cents worth.

that chart is not wrong, it is what it is.
The RPM axis and the HP axis line up - it is a straight up comparison.
Both are even from the same manufacturer of dyno's, DynoJet.

IMHO, that chart is not Tims kit vs. Andy's kit.

It is an excellent representation of what is known about the twin screw and the centrifugal blowers. Its just Physics.

The twin screws (and the Roots-type, not pictured here) are positive-discplacement blowers. They come in right away, providing boost even at the bottom end. They also flatten out quickly and slowly diminish as they are spun faster. They reach their peak and fall off - this is not Andy's fault - it is the nature of that blower.

Centrifugal blowers come in later, but on the other hand, a centrifugal will not fall off - the faster you spin them the more boost they make. Thier curve continues to climb until you restrict the intake.

This chart is a perfect example of the inherant nature of the two.

Another consideration: the twin-screw heats the air significantly more than the centrifugal does. (This is referred to as adiabatic efficiency) This heat in the charged air is bad - can contribute to detonation - so we remove it with intercoolers.

In the case of the twin-screw, the intercooler must rest in the valley of the V8, below the twin-screw, between it and the motor. That limits the size the intercooler can be, and they must also fight heat gain by conduction and convection in that hot spot.

That is why the drag racers often have their positive-discplacement blowers sticking up out of their hood.... check - the intercooler under their Roots or Twin Screw is about 8" or more thick!

Centrifugals do not need as big of an intercooler, but we have room for a bigger one than we need, and they are mounted out in a relatively cooler environment.
Old 11-19-2004, 03:02 PM
  #49  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

Man I need to come up with some fake user names like the Guys from WI to sling mud with so I can stay clean like Tim. It's a pretty slick concept, god cop bad cop kind of thing.

Lag, Z, Dr Wolfgang, SRV
Whichever and Whoever you really are. Not one of Tim's 8psi kits installed on ANY 928 has made even close to the kind of power shown in that chart even with significant mods. It is clearly an attempt to decieve potential buyers. It not a surprise since Mark R claims the design is stolen from him.

Here 's a list of cars dynoed with Tim's 8psi kit.
Don T 403 RWHP
Pete W (with significant exaust mods) 417RWHP
Jorj 330RWHP really? only 330RWHP for $7600 yep OUCH! sorry jorj
Someone's GT YEP! GT 405RWHP

On the otherhand the FAST kit seems to produce more than the advertised results: Taken from www.f-a-s-tonline.com

"Customer: Tim M: 1988 S4 5-speed, 80K miles on stock/original engine, 7psi boost, no intercooler, stock exhaust w/RMB, full emissions equipped, AutoThority chips."
410RWHP with no intercooler on 7 psi
If you want to dispute the dyno Lag just ask Tim about it. It's his car in the chart with the F-A-S-T kit on it.

Andy K
Old 11-19-2004, 03:14 PM
  #50  
Shane
Sharkaholic
Lifetime Rennlist
Member
 
Shane's Avatar
 
Join Date: May 2002
Location: Rochester, WA
Posts: 5,162
Received 2 Likes on 2 Posts
Default

The twin screws (and the Roots-type, not pictured here) are positive-discplacement blowers. They come in right away, providing boost even at the bottom end. They also flatten out quickly and slowly diminish as they are spun faster. They reach their peak and fall off - this is not Andy's fault - it is the nature of that blower.
Don't see my HP falling off! But it wasn't run up to redline either, so I can't say for sure what would have happened, but it looks like it would have kept climbing.
Dyno thread for Shanes' car
Andy chill dude! Nobody stole nothing from anybody! That f.a.s.t dyno sheet was most likely after Tim had already made a bunch of mods to the original kit.
Old 11-19-2004, 03:35 PM
  #51  
hacker-pschorr
Administrator - "Tyson"
Lifetime Rennlist
Member
 
hacker-pschorr's Avatar
 
Join Date: Aug 2001
Location: Up Nort
Posts: 1,584
Received 2,201 Likes on 1,242 Posts
Default

Originally Posted by GoRideSno
Lag, Z, Dr Wolfgang, SRV
You really need to get a clue on this one, it's getting old.

Lag - Has a Red ZO6 - Black S4 - Black 993

Z - Black S4 - Grayish Toyota

Dr Wolfgang is none of the above nor myself or Tim. Yes I do host pics for him and manage his web site (on a different server than the location of the pics that led you to belive I was Wolfie). I currently manage 20+ web address for many different companies. Just because they are all in my name, does that mean I'm also that person? Do a whois on murf928.com - guess that means
Tim Murphy and myself are the same person?

I have no idea who SRV is so you've got me there.
Old 11-19-2004, 03:46 PM
  #52  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

Lag,
Let's review
I didn't say Tim stole it Mark R did.
Inever said I would sue over copyright. I said I would pass it on to be handled.
Get your facts straight.
Tim's car probably did make that power, WITH siginificant other mods, NOT part of the kit.
NOT one customer car has made that on 8psi though even with significant mods.
Cheers,
Andy K

Last edited by GoRideSno; 11-19-2004 at 04:14 PM.
Old 11-19-2004, 03:53 PM
  #53  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

Man, you sound *SCHIZO*!
Talk about Schizoid, what kind of a person spends hours and hours reading and quoting another person's posts and then dosen't even bother to introduce themselves when they are in the same room.
I am talking about Z not saying helo to John at Wichita. I guess it would have made it a little harder for him to continue to terrorize John.

Andy K
Old 11-19-2004, 04:13 PM
  #54  
Tim Murphy
Addict
Rennlist
Site Sponsor

 
Tim Murphy's Avatar
 
Join Date: Jan 2003
Location: Green Bay Wisconsin
Posts: 951
Likes: 0
Received 0 Likes on 0 Posts
Default

The chart on FAST-s website was done at 9psi, 24lb injectors, no FMU, fuel pressure set at 90psi, cat bypass, 87 mid mufflers, RMB, and I think I had the chips in there.
There were more components on the car that were from Fleet Farm than what came from FAST.

If Mark R. thinks I copied his design he should take a closer look at my kit. There is not one single shared component between the kits besides the supercharger, NOT ONE. I have sold 5 FAST upgrade kits to people that just gave up trying to get the FAST kit to work. It cost these customers a pretty hefty premium to upgrade compared to getting my stage 2 kit right off the bat. They basically had to throw the entire FAST kit away. Every kit that FAST sells is an absolute injustice to the 928 community. Some of the customers that I have upgraded monitor this board and maybe they will make comment of their own experience.

Originally Posted by GoRideSno

Here 's a list of cars dynoed with Tim's 8psi kit.
Don T 403 RWHP
Pete W (with significant exaust mods) 417RWHP
Jorj 330RWHP really? only 330RWHP for $7600 yep OUCH! sorry jorj
Someone's GT YEP! GT 405RWHP

Andy K
You forgot Old& New at 465rwhp, LAG at 513, me at 410, 465, 490, 525, 556. These were all done with the same kit.
BTW, the above cars have the Murf928 Stage 2 kit, that was designed around 8psi, not an 8psi kit.

It is very disrespectful of you to mock on what others have made decisions on, but I guess that lends to your character. I never heard Jorj7 say he was upset with what he has and it is not your place to drag him into something that you want to believe.

Once again, you don’t stick to the true facts and when the facts are not in your favor you feel the need to point fingers and make all kinds of false accusations. Your accusations of Carl on a recent thread were inexcusable and I sit here today bewildered that you never offered a public apology, as was asked for by a few on this board as well as Carl. You continue to amaze me in many ways.
Old 11-19-2004, 04:19 PM
  #55  
BC
Rennlist Member
 
BC's Avatar
 
Join Date: Dec 2001
Posts: 25,150
Received 82 Likes on 55 Posts
Default

Originally Posted by Tim Murphy
were from Fleet Farm than what came from.....
.

....Ah, Good old Fleet Farm, not to be confused with Farm and Fleet. Many a good couple hours were spent in that fine place. Even the gas was cheaper as I recall. So many interesting ways to spend money.... I get misty eyed just thinking about it.
Old 11-19-2004, 04:20 PM
  #56  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

You forgot Old& New at 465rwhp, LAG at 513, me at 410, 465, 490, 525, 556. These were all done with the same kit.
Lag has significant mods other than the kit and is running well over 10psi
Old&New was running 10psi for the 465rwhp
And you...well your car is highly modified. You even mentioned that you had "cool water running through the IC" for the 525 run.

Show me a customer Dyno chart that is even close to the power in your dyno with 8psi. The closest one I have seen is Pete W and he has significant mods and only got 416.9rwhp.
BTW I haven't mocked jorj or nor do I claim to espressed his opinion. I have merely cited data that he has openly presented.

Andy K
Old 11-19-2004, 04:27 PM
  #57  
hacker-pschorr
Administrator - "Tyson"
Lifetime Rennlist
Member
 
hacker-pschorr's Avatar
 
Join Date: Aug 2001
Location: Up Nort
Posts: 1,584
Received 2,201 Likes on 1,242 Posts
Default

Originally Posted by BrendanC
....Ah, Good old Fleet Farm, not to be confused with Farm and Fleet. Many a good couple hours were spent in that fine place. Even the gas was cheaper as I recall. So many interesting ways to spend money.... I get misty eyed just thinking about it.
You now what they say, If Fleet Farm doesn't have it, you don't need it!
Old 11-19-2004, 04:29 PM
  #58  
Tim Murphy
Addict
Rennlist
Site Sponsor

 
Tim Murphy's Avatar
 
Join Date: Jan 2003
Location: Green Bay Wisconsin
Posts: 951
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by GoRideSno
You even mentioned that you had "cool water running through the IC" for the 525 run.

Andy K
I never said that because it is not true. There you go again.
Old 11-19-2004, 04:35 PM
  #59  
GoRideSno
Drifting
 
GoRideSno's Avatar
 
Join Date: Feb 2002
Location: Redondo Beach, CA>>>>Atlanta,GA
Posts: 2,015
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally posted By Tim Murphy
The dyno sofware does correct for this and adjusts the numbers accordingly but what it can't adjust for is the cold reservoir of water that I was pumping through the air/water intercooler which was probably good for 25HP.
Hmmmmm never said that?

I guess you're right it's "cold water"

Andy K
Old 11-19-2004, 04:38 PM
  #60  
Tim Murphy
Addict
Rennlist
Site Sponsor

 
Tim Murphy's Avatar
 
Join Date: Jan 2003
Location: Green Bay Wisconsin
Posts: 951
Likes: 0
Received 0 Likes on 0 Posts
Default

That obviously was taken out of context so why don't you post the rest of it and I can confirm what it was in reference to. It was a cold day when I dyno'd the 463rwhp, maybe that was what I was talking about?

Why do you always think things are not as they appear?


Quick Reply: 16V L-Jet supercharger updates? Anyone?



All times are GMT -3. The time now is 07:40 PM.