Murf928 Stage 3 SuperShark is alive!
05-30-2007, 03:34 AM
#31
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Tim,
Great news on the new kit! With Safety and Reliability being such big concerns with these ventures, I for one appreciate all the testing and development you've done. Of course we love the power! As I'm sure it is with all the different SC kits out there - it just feels right having this kind of power in the 928. Do I want more = Yes! Do I have enough now = most likely, but the desire for more is always there...
Sooooo, what's involved in the upgrade for us Stage II owners - injectors, new Vortech pulley, chips? Any idea on the cost?
Thanks,
Pete Whelan
1988 928S4, Murph SC'd
Great news on the new kit! With Safety and Reliability being such big concerns with these ventures, I for one appreciate all the testing and development you've done. Of course we love the power! As I'm sure it is with all the different SC kits out there - it just feels right having this kind of power in the 928. Do I want more = Yes! Do I have enough now = most likely, but the desire for more is always there...
Sooooo, what's involved in the upgrade for us Stage II owners - injectors, new Vortech pulley, chips? Any idea on the cost?
Thanks,
Pete Whelan
1988 928S4, Murph SC'd
05-30-2007, 09:48 AM
#35
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Quote=V2Rocket_aka944]Andrew, at those boost levels I'd suggest 951 pistons.[/quote]
I agree with Hacker. I don't need anything special, just a smaller pulley and some tuning... oh and probably 42# injectors. Also let's not forget that the TS is a bit more efficient CS 
, so I should be able to achieve 500RWHP at or slightly below 10psi. I've already talked to DR about achieving this goal. 
Originally Posted by Hacker-Pschorr
Why? Tim's other car is running 17+psi on stock (dished) pistons.
, so I should be able to achieve 500RWHP at or slightly below 10psi. I've already talked to DR about achieving this goal.
05-30-2007, 10:04 AM
#36
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Tim:
That is an awesome acheivement, congratulations. It is very impressive to me how the upper limit continues to be explored and surpassed. These vehicles really are very robust.
Ken
That is an awesome acheivement, congratulations. It is very impressive to me how the upper limit continues to be explored and surpassed. These vehicles really are very robust.
Ken
05-30-2007, 10:13 AM
#38
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Originally Posted by Andrew Olson
Quote=V2Rocket_aka944]Andrew, at those boost levels I'd suggest 951 pistons.
, so I should be able to achieve 500RWHP at or slightly below 10psi. I've already talked to DR about achieving this goal. [/QUOTE]Andrew
I thought TS was slightly LESS efficient than a CS....only about 10% though.... Something like this: 50% roots, 65% TS & 75% CS.....???
05-30-2007, 10:16 AM
#39
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Iceman / Andrew - knock it off!! 
becasue we all know which one is really better
becasue we all know which one is really better
05-30-2007, 10:37 AM
#40
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Brian-
I made 441RWHP at about 8psi. That roughly 20RWHP/psi. (I'm using 15% loss)
Murph achieved 511RWHP at about 12psi. Using 18% loss, that's an improvement of 214 RWHP or roughly 18RWHP/psi.
That means the TS is about 10% more efficient in this real world case. However, in reality, it's not that big of a difference... just a different path to the same destination!
I made 441RWHP at about 8psi. That roughly 20RWHP/psi. (I'm using 15% loss)
Murph achieved 511RWHP at about 12psi. Using 18% loss, that's an improvement of 214 RWHP or roughly 18RWHP/psi.
That means the TS is about 10% more efficient in this real world case. However, in reality, it's not that big of a difference... just a different path to the same destination!
05-30-2007, 10:38 AM
#41
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Originally Posted by Hacker-Pschorr
Iceman / Andrew - knock it off!!
becasue we all know which one is really better
becasue we all know which one is really better
05-30-2007, 12:11 PM
#42
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I think the GT gets a better HP per PSI of boost gain then the S4 with the same system. I remember Andy telling me that his S4 systems made 15HP per PSI and the same system on a GT making 20-25 HP per PSI of boost.
05-30-2007, 01:13 PM
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I made 441RWHP at about 8psi. That roughly 20RWHP/psi. (I'm using 15% loss)
Murph achieved 511RWHP at about 12psi. Using 18% loss, that's an improvement of 214 RWHP or roughly 18RWHP/psi.
Murph achieved 511RWHP at about 12psi. Using 18% loss, that's an improvement of 214 RWHP or roughly 18RWHP/psi.
That'd be 141 increase @ 8psi for 17.6/psi and 246 increase @ 12psi for 20.5/psi --> Murph's is more efficient
Looking forward to your results after tuning though and a comparison with the shape of your <TS> power curve
Congratulations Murph !!