NoPistons -Mazda Rx7 & Rx8 Rotary Forum
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NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)
-   Single Turbo Discussion (https://www.nopistons.com/single-turbo-discussion-13/)
-   -   2 Big Single's? (https://www.nopistons.com/single-turbo-discussion-13/2-big-singles-39127/)

Dramon_Killer 05-31-2004 02:20 PM
Originally Posted by jspecracer7' date='May 30 2004, 06:26 PM
On that same thought though i'm probably wrong but wouldn't the whole complexity thing in turn make it less reliable? I suppose it would be different if you did your own twin turbo setup, but mazda kinda ruined it for me with the their version of the twin turbo system on 3rd gens.

Srce 05-31-2004 02:48 PM
Originally Posted by rdavidsrx7' date='May 30 2004, 03:40 PM
srce,

have you talked to Howard Coleman about his setup? His name may have been mentioned early on in this thread, but what was stated was not up to date. He is trying out a twin t-04s setup right now and is just now breaking in the motor. He told me that he saw 5 psi of boost however by 2100 rpm. He has been working with majestic turbo, and I can't wait till his engine is broken in and then tuned so we can see what he gets out of that setup.



Bob
Sorry, I don't even know who he is. When did he start his project and where can I get more details?



Thanks

Dysfnctnl85 05-31-2004 02:54 PM
Originally Posted by Dramon_Killer' date='May 31 2004, 03:20 PM
On that same thought though i'm probably wrong but wouldn't the whole complexity thing in turn make it less reliable? I suppose it would be different if you did your own twin turbo setup, but mazda kinda ruined it for me with the their version of the twin turbo system on 3rd gens.
That's what I was trying to say. https://www.nopistons.com/forums/pub..._DIR#>/sad.png

93 R1 05-31-2004 04:01 PM
Originally Posted by FikseRxSeven' date='May 30 2004, 12:08 AM
yup very unique...... turbo setup without a car
Now thats funny

j9fd3s 05-31-2004 04:03 PM
theoretically more power = higher combustion pressure, so a 400hp 13b should have a certain amount of combustion pressure, we'll call it bo. when you compress air it gets hotter; hotter = more prone to detonation. we'll call that luke.

and we'll call airflow daisy duke.



so



the less luke you have the more daisy duke you can have for the same bo!



or airflow isnt the reliabilty problem its heat, or heat induced detonation



detonation is somewhere along the lines of 10x more pressure (plus a shockwave) than normal combustion, this is why it does so much damage

93 R1 05-31-2004 05:10 PM
nice analogy

jspecracer7 05-31-2004 05:13 PM
I think what Mikeypoo is trying to say is that higher compression(more boost) will raise the intake temperature higher and thus increase the chances of detonation. When a turbo is in it's effeciency range(and below) the air it blows into the engine will be of a lower temperature than a high boost turbo.



Did I get Daisy, Sally, Jessie, Bo and Luke right? https://www.nopistons.com/forums/pub...1047683561.gif

Dysfnctnl85 05-31-2004 06:04 PM
Originally Posted by j9fd3s' date='May 31 2004, 05:03 PM
theoretically more power = higher combustion pressure, so a 400hp 13b should have a certain amount of combustion pressure, we'll call it bo. when you compress air it gets hotter; hotter = more prone to detonation. we'll call that luke.

and we'll call airflow daisy duke.



so



the less luke you have the more daisy duke you can have for the same bo!



or airflow isnt the reliabilty problem its heat, or heat induced detonation



detonation is somewhere along the lines of 10x more pressure (plus a shockwave) than normal combustion, this is why it does so much damage
Thank you. It all makes sense! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

j9fd3s 05-31-2004 07:36 PM
Originally Posted by 93 R1' date='May 31 2004, 02:10 PM
nice analogy
i could have used x, and y but thats no fun

rdavidsrx7 05-31-2004 07:56 PM
Originally Posted by Srce' date='May 31 2004, 11:48 AM
Sorry, I don't even know who he is. When did he start his project and where can I get more details?



Thanks
he is on the other forum...not sure if he is on nopistons at all. Not sure when he started this project. I know he has been working closely with kevin at majestic turbos though. Look him up his screen name is howard_coleman, so it's pretty easy to remember. The have been doin stuff like machining wight off the bolt that holds on the exhaust turbine, and putting a bullet shaped nut on to hold on the compressor wheel for increased flow. Also I think much work went into the manifold design. PM him though he would have better details than I, obviously.



Later



Bob


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