6 port turbo questions!
08-30-11, 10:52 AM
#1
6 port turbo questions!
i'm gathering parts to make a 6 port turbo. I got a few quick questions I could not find from searching.
1. I plan on using an Rtek, would it be dumb to use the NA ECU instead of finding a turbo ECU/pressure sensor/AFM (what else would be needed?)
2. How much shaft play is acceptable? I believe I heard it will have some shaft play when cold due to no oil. Where can I find a rebuild kit if they are available?
3. I have a full Racing Beat NA exhaust, would it be too restrictive with a stock turbo?
Thanks.
1. I plan on using an Rtek, would it be dumb to use the NA ECU instead of finding a turbo ECU/pressure sensor/AFM (what else would be needed?)
2. How much shaft play is acceptable? I believe I heard it will have some shaft play when cold due to no oil. Where can I find a rebuild kit if they are available?
3. I have a full Racing Beat NA exhaust, would it be too restrictive with a stock turbo?
Thanks.
08-30-11, 08:26 PM
#3
Rotary Enthusiast
I think that the RB cat back is the same for turbo and n/a. But make SURE that you have supporting mods before you run boost. Injectors, pump, the works. Remember that at the same boost levels, the turbo 6 port will have higher power vs the standard turbo engine.
08-31-11, 08:53 AM
#4
Thank you for the replies.
One more thing, when my engine was rebuilt the builder used turbo housings since he did not have n/a housings.
I do know the spark plug placing is father on the turbo housings. Is that going to effect the engine negatively if i use the n/a ECU? (now that I think about it I guess it would make sense to use a turbo ECU.)
One more thing, when my engine was rebuilt the builder used turbo housings since he did not have n/a housings.
I do know the spark plug placing is father on the turbo housings. Is that going to effect the engine negatively if i use the n/a ECU? (now that I think about it I guess it would make sense to use a turbo ECU.)
08-31-11, 09:06 AM
#5
Rotor-aholic
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If it was me I would just use the turbo ecu, because I believe, and someone correct me if I'm wrong, the turbo ecu has capability to adjust timing better when in boost.
Its nicer to have the turbo housings, since they do not have the exhaust diffuser.
Its nicer to have the turbo housings, since they do not have the exhaust diffuser.
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09-01-11, 09:59 AM
#9
If you keep the n/a intake you will have to build a spacer to use the stock turbo, and then possibly hammer the "frame" rail or whatever that square structural bit is that gets in the way.
09-01-11, 07:00 PM
#12
Modifying the TII intake is easy. Takes an afternon. http://www.aaroncake.net/rx-7/4PortLIMTo6Port.htm
Don't use the NA ECU.
Don't use the NA ECU.
09-01-11, 07:28 PM
#13
turbo and n/a housing use the same plug timing, the series of housings is what matters.
use the turbo ECU, i don't think Rtek can modify a non turbo ECU to work for you as they do not gut out the whole thing i don't believe. for confirmation ask Rtek directly.
turbo shaft lateral play is generally acceptable to the point that the blades start to come close to touching the housings, thrust play in any form is not acceptable.
use the turbo ECU, i don't think Rtek can modify a non turbo ECU to work for you as they do not gut out the whole thing i don't believe. for confirmation ask Rtek directly.
turbo shaft lateral play is generally acceptable to the point that the blades start to come close to touching the housings, thrust play in any form is not acceptable.
09-01-11, 07:51 PM
#14
tom port.. AKA streetport
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swap the pressure sensor and MAF out with the ECU for the TII. dont forget the injectors and running the oil lines for the turbo. you need a sandwich adapter for the oil filter
09-01-11, 10:46 PM
#15
I read something about adapting the NA wire harness? What is that about? also, do I need knock sensors with the stock ECU? will it give error codes?
Here is a list I found that someone compiled:
-S4 Turbocharger and wastegate
-S4 Turbo Manifold
-Corksport Downpipe
-HKS SSQV Blow off valve
-S4 T2 LIM
-S4 T2 UIM
-S4 T2 Throttle Body
-S4 T2 Throttle cable
-Godspeed front mount intercooler
-S4 T2 550cc injectors
-walbro 255lph fuel pump
-Stock S4 T2 ECU
-S4 T2 AFM
-S4 T2 pressure Sensor
-S4 T2 Knock sensor
-S4 T2 fuel rails
-Air raid cone filter
-Ebay fmic piping
-Greddy turbo timer and harness
-All new gaskets for everything
-Stock s4 T2 oil/water lines modified to work on N/A
-Racing beat oil filter pedestal
Here is a list I found that someone compiled:
-S4 Turbocharger and wastegate
-S4 Turbo Manifold
-Corksport Downpipe
-HKS SSQV Blow off valve
-S4 T2 LIM
-S4 T2 UIM
-S4 T2 Throttle Body
-S4 T2 Throttle cable
-Godspeed front mount intercooler
-S4 T2 550cc injectors
-walbro 255lph fuel pump
-Stock S4 T2 ECU
-S4 T2 AFM
-S4 T2 pressure Sensor
-S4 T2 Knock sensor
-S4 T2 fuel rails
-Air raid cone filter
-Ebay fmic piping
-Greddy turbo timer and harness
-All new gaskets for everything
-Stock s4 T2 oil/water lines modified to work on N/A
-Racing beat oil filter pedestal
09-02-11, 10:07 AM
#18
Engine, Not Motor
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Aux ports are awesome with forced induction. In fact, I am of the opinion that the ideal evolution of the turbo 6 port is a small and responsive turbo coupled with working aux ports and nice long runners. This is how I am building my Cosmo.
However, since this requires a custom everything, it is beyond what most people are willing to do.
However, since this requires a custom everything, it is beyond what most people are willing to do.
09-02-11, 10:16 AM
#19
Well that makes thing very interesting for me.
I have RPM activated aux ports via a small vacuum pump. I could retain them if I built a custom exhaust manifold moving the turbo towards the front of the engine bay to leave space for the stock manifold.
Would that be "ideal" with a stock turbo since it is fairly small?
What is the advantage of the aux ports? I assume better low rpm power?
I think I may do this and document it.
I have RPM activated aux ports via a small vacuum pump. I could retain them if I built a custom exhaust manifold moving the turbo towards the front of the engine bay to leave space for the stock manifold.
Would that be "ideal" with a stock turbo since it is fairly small?
What is the advantage of the aux ports? I assume better low rpm power?
I think I may do this and document it.
09-02-11, 10:22 AM
#20
Engine, Not Motor
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In this one instance I'm not going to reveal too much about my plans, because it will be unique and I want to show it on one of my Cosmo videos.
But yes, you'd have to build a manifold to move the turbo out of the way. Then use boost pressure to actuate the ports.
The stock turbo is small, but it's just so ancient and crappy. I'd never use it, nor would I recommend it be used especially because the flanges are proprietary.
But yes, you'd have to build a manifold to move the turbo out of the way. Then use boost pressure to actuate the ports.
The stock turbo is small, but it's just so ancient and crappy. I'd never use it, nor would I recommend it be used especially because the flanges are proprietary.
09-04-11, 07:48 PM
#21
In this one instance I'm not going to reveal too much about my plans, because it will be unique and I want to show it on one of my Cosmo videos.
But yes, you'd have to build a manifold to move the turbo out of the way. Then use boost pressure to actuate the ports.
The stock turbo is small, but it's just so ancient and crappy. I'd never use it, nor would I recommend it be used especially because the flanges are proprietary.
But yes, you'd have to build a manifold to move the turbo out of the way. Then use boost pressure to actuate the ports.
The stock turbo is small, but it's just so ancient and crappy. I'd never use it, nor would I recommend it be used especially because the flanges are proprietary.
Just my 2 cents.
BTW wouldn't this be like a twin scroll but in the intake instead of in the turbo.
09-05-11, 10:40 AM
#22
Engine, Not Motor
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Using boost pressure is a interesting way i was thinking rpm threshold (while reading this). Aaron you are using a MS it should be easy. That way no matter how much boost your runnig it will always open at the same time.
Just my 2 cents.
BTW wouldn't this be like a twin scroll but in the intake instead of in the turbo.
Just my 2 cents.
BTW wouldn't this be like a twin scroll but in the intake instead of in the turbo.
Now there is a little bit more to it then that but I'm not going to go into details since I want to be the first. But look at the FD turbo system and you'll see some clues about how to control actuators "reliably" with boost pressure.