350rwhp mark
#79
Nordschleife Master
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Originally posted by Chris Prack
Either turbo produced full boost by 3-3.2k rpm.
I will post more later. I have to work today.
Either turbo produced full boost by 3-3.2k rpm.
I will post more later. I have to work today.
But that either turbo had full bost around 3-3.2k doesn't seem right at all when looking at the charts.
I'm not saying anything is wrong with it, but to produce those numbers at relatively low boost the turbochargers has to be pretty big.
Here's an overlay of your two charts I've done.
Reading of the torque curves it seems like the first turbo sees full boost at around 4k and the second turbo at around 4.6k.
![](http://www.revline.se/porsche/div/Chris_Prack_Dynocharts_overlay.jpg)
Here's another overlay with your first chart and Guru Racing latest chart, both at the same boost.
Reading of the chart, the Guru car comes on boost earlier with a flatter torque curve, but to the price of 35 rwhp. Not saying any of the two are better, just showing the pros and cons.
![](http://www.revline.se/porsche/div/chris_guru_overlay.jpg)
So I really can't see what's so special with those turbos that they're worth over $3K. I think a big parts comes down to the hotsides. When talking KKK-hybrids everyone's scared of going with larger then the 8#. But when there's custom turbos installed I'm pretty sure many of them have larger hotsides, which is necessary to get to high HP numbers without insane boost (like 29psi
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#80
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Originally posted by Chris Prack
No it's not a secret trick. I made 450 rwhp on a 2.5 @ 1.4 bar and used 82# injectors with a Motec M4. The duty cycle on the injectors at 1.4 bar was about 73%.
IC discharge temp started to creep up near 60 deg. C. With a better intercooler it should do better.
How long did it live @ 29 psi???
Wow!
No it's not a secret trick. I made 450 rwhp on a 2.5 @ 1.4 bar and used 82# injectors with a Motec M4. The duty cycle on the injectors at 1.4 bar was about 73%.
IC discharge temp started to creep up near 60 deg. C. With a better intercooler it should do better.
How long did it live @ 29 psi???
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450 rwhp at 29 PSI (equals to 1.4 bar). Not very much impressive. What about longelivety?
OK, turbo is $3,200 plus custom adapter for the crossover pipe plus Motec4 plus plus
Hmmm about $10 K?
Probably on race gas because both John and Danno don't recommend going above 15/18 PSI with pump gas.
NOT very impressive, but impressive expensive!
#81
Nordschleife Master
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Originally posted by turbo951fan
450 rwhp at 29 PSI (equals to 1.4 bar). Not very much impressive. What about longelivety?
450 rwhp at 29 PSI (equals to 1.4 bar). Not very much impressive. What about longelivety?
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#82
Nordschleife Master
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Originally posted by turbo951fan
450 rwhp at 29 PSI (equals to 1.4 bar). Not very much impressive. What about longelivety?
OK, turbo is $3,200 plus custom adapter for the crossover pipe plus Motec4 plus plus
Hmmm about $10 K?
Probably on race gas because both John and Danno don't recommend going above 15/18 PSI with pump gas.
NOT very impressive, but impressive expensive!
450 rwhp at 29 PSI (equals to 1.4 bar). Not very much impressive. What about longelivety?
OK, turbo is $3,200 plus custom adapter for the crossover pipe plus Motec4 plus plus
Hmmm about $10 K?
Probably on race gas because both John and Danno don't recommend going above 15/18 PSI with pump gas.
NOT very impressive, but impressive expensive!
#84
Nordschleife Master
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Originally posted by turbo951fan
Yes, you are right. Must be something wrong with my calculator. Thanks for the hint.
He was saying that the turbos .
What about the rest?
Yes, you are right. Must be something wrong with my calculator. Thanks for the hint.
He was saying that the turbos .
What about the rest?
Chris states numbers of 450 rwhp at 1,4 bar (20,6 psi) and he uses a turbo for $3,000 to 3,200
Hope that will clear up some things
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#86
Three Wheelin'
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Well, the big T04E's aren't exactly a bolt on either. It's got a pretty darn big housing, and requires moving coolant lines a little bit and shaving a bit off of the intake manifold to get the sucker to fit.
My new T04E upgrade has a .70 A/R housing with a 4" inlet. It fits even with A/C and alternator in the stock location, but it wasn't easy lol.
My new T04E upgrade has a .70 A/R housing with a 4" inlet. It fits even with A/C and alternator in the stock location, but it wasn't easy lol.
#87
Drifting
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OK, NZ951 this primarily for you! It looks like I F'd up. The street car that made the 360whp had more done to it than I remembered. I found some pics on my PC and it jogged my memory. Below is a pic of the IC pipes we made. Notice the port for the HKS bypass valve. Also I do remember a discussion about his injectors, he thought they had been changed but did not remember for sure. He was supposed to check a invoice from a prior shop and see what it said. It has a AFPR on it or a factory 3 bar. I can't remember which. It has the Tial wastegate as stated but also has a Apexi boost controller that I installed a couple of years ago.....
The engine is in fact a 200+k mile engine that is completely stock (head,cam,intake,pistons,etc.).
I have included some of the pics of the turbo and such.
This does not change the fact that it does reach full boost by 3.2k and make the power stated on pump fuel.
![Roll Eyes (Sarcastic)](https://rennlist.com/forums/images/smilies/rolleyes.gif)
I have included some of the pics of the turbo and such.
This does not change the fact that it does reach full boost by 3.2k and make the power stated on pump fuel.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)