Building Custom Turbo for the RX-8
12-27-2004, 08:19 PM
#54
Absolute Rotary Madness
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Jeff sorry for the stupidity in this question, but it made me wonder:
The intercooler stands in front of the radiator, won't that cause any problems?
I know very little about turbos. I never onwed a turocharged car
Great job
The intercooler stands in front of the radiator, won't that cause any problems?
I know very little about turbos. I never onwed a turocharged car
Great job
12-27-2004, 08:57 PM
#56
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Jeff
You have managed to get your turbo system up in a few weeks while the others have been plutsing around for months..... awesome
A driven knowledgeble person can achieve more on his own than a bunch of so called experienced wankels .
cheers
michael
You have managed to get your turbo system up in a few weeks while the others have been plutsing around for months..... awesome
A driven knowledgeble person can achieve more on his own than a bunch of so called experienced wankels .
cheers
michael
12-27-2004, 09:10 PM
#57
Spirited Driver
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I'm in Northern VA
Actually I would like to stop by and check out your work if I could. I'm in Alexandria. Shoot me an e-mail at jrcrew@hotmail.com if its okay.
12-27-2004, 09:31 PM
#58
Registered
Jeff,
When you're all done, can you give us a total cost of parts and list what you used? Everything looks great in this setup, I just worry about how hot that turbo is gonna get crammed in there like that.
When you're all done, can you give us a total cost of parts and list what you used? Everything looks great in this setup, I just worry about how hot that turbo is gonna get crammed in there like that.
12-27-2004, 09:55 PM
#59
Originally Posted by Richard Paul
Has anybody given thought to if the electric throtle body can take being pressurized?
When it is closed, the BOV is open. When there is pressure, the TB is open.
Originally Posted by RotorManiac
The intercooler stands in front of the radiator, won't that cause any problems?
Originally Posted by Ajax
Jeff,
When you're all done, can you give us a total cost of parts and list what you used?
When you're all done, can you give us a total cost of parts and list what you used?
The turbo on this list actually ended up in my Miata. I am using the T3/T4 that was on my Miata on the RX-8. It was entirely too large for the little 1.8 in the MX-5. Turbonetics Stage 3 Exhaust Wheel in .63 Housing, 54 Compressor Wheel in .50 A/R, Oil Cooled with 360 Degree Race Bearings and a Ceramic Coated Exhaust Housing.
I will create a new thread when I am done that details the installation a little more closely with much more detail.
Originally Posted by Ajax
Everything looks great in this setup, I just worry about how hot that turbo is gonna get crammed in there like that.
The other systems out there (except Greddy) put the turbo in a place where, I feel, the heat will be a bigger problem.
The only issue with having the turbo where it is in my setup is shielding the compressor from the heat. I have a bunch of clever heat blocking parts that I will show when I finalize the installation.
Last edited by MazdaManiac; 12-27-2004 at 09:59 PM.
12-27-2004, 10:15 PM
#60
Ya wanna give me that picture one more time? When the TB is open it is equal pressure to the manifold. So if you have over ambiant you have a delta pressure in the TB. How does one get around that?
IE: if you have 10 psi in the manifold you have it in the TB also. You have it in the tract all the way to the turbo.
Edit) OK I see what you meant, across the blade. That is not what I mean, I am talking from inside to outside and into the electronic compartment.
IE: if you have 10 psi in the manifold you have it in the TB also. You have it in the tract all the way to the turbo.
Edit) OK I see what you meant, across the blade. That is not what I mean, I am talking from inside to outside and into the electronic compartment.
Last edited by Richard Paul; 12-27-2004 at 10:19 PM.
12-27-2004, 10:21 PM
#61
Originally Posted by Richard Paul
OK I see what you meant, across the blade. That is not what I mean, I am talking from inside to outside and into the electronic compartment.
Even if there were, why would pressure be any different than vacuum?
12-27-2004, 11:42 PM
#66
On the T3/T4 that I am using, I can "get" up to 21 PSI or so. That would last for about 2 or 3 seconds. 
I will be starting at zero PSI to shake it all down and then I will move up to 5 PSI and then 7 PSI which is all the OEM fuel injection will handle safely.
After that, I am going to add two more fuel injectors to the main runners of the intake manifold so I can go to 9 PSI. I think that is all the stock seals will be happy with.
I am moving incrementally so that I can document all of the changes and be certain that I am not missing something critical that costs me my motor.
I am also limited by my budget, which I am very strict about - it is one of my design goals to keep the entire budget under $3500 (my $50/HP ratio that I maintain as a minimum for all of my serious projects).
Of course, I managed much more out of the Miata and my MX-3 ($30 and $27 per 1 HP, respectively), so we'll see what the final ratio works out to be.
I will be starting at zero PSI to shake it all down and then I will move up to 5 PSI and then 7 PSI which is all the OEM fuel injection will handle safely.
After that, I am going to add two more fuel injectors to the main runners of the intake manifold so I can go to 9 PSI. I think that is all the stock seals will be happy with.
I am moving incrementally so that I can document all of the changes and be certain that I am not missing something critical that costs me my motor.
I am also limited by my budget, which I am very strict about - it is one of my design goals to keep the entire budget under $3500 (my $50/HP ratio that I maintain as a minimum for all of my serious projects).
Of course, I managed much more out of the Miata and my MX-3 ($30 and $27 per 1 HP, respectively), so we'll see what the final ratio works out to be.
12-27-2004, 11:54 PM
#67
Originally Posted by Lock & Load
Jeff
You have managed to get your turbo system up in a few weeks while the others have been plutsing around for months..... awesome
A driven knowledgeble person can achieve more on his own than a bunch of so called experienced wankels .
cheers
michael
You have managed to get your turbo system up in a few weeks while the others have been plutsing around for months..... awesome
A driven knowledgeble person can achieve more on his own than a bunch of so called experienced wankels .
cheers
michael
PS - In the second sentence above, replace "driven" with "impatient" and "knowledgeable" with "idiot savant" and you will be more on the mark.
12-28-2004, 06:31 AM
#68
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Jeff , She looks like she is shaping up very nice. Good luck. Also the throttle body is a ford unit that they use on the SC mustang so it will be fine. Actually the ford TB has been proven over the past years it is a strong unit. They use it on all the SVT lines and anything ford owns with Drive by wire .
-Ryan
.-Ryan
12-28-2004, 08:03 AM
#69
Originally Posted by Broke_Apex_Seal
Jeff , She looks like she is shaping up very nice. Good luck. Also the throttle body is a ford unit that they use on the SC mustang so it will be fine. Actually the ford TB has been proven over the past years it is a strong unit. They use it on all the SVT lines and anything ford owns with Drive by wire .
-Ryan
.-Ryan
12-28-2004, 08:11 AM
#70
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Originally Posted by ALXVA8
Actually I would like to stop by and check out your work if I could. I'm in Alexandria. Shoot me an e-mail at jrcrew@hotmail.com if its okay.
12-28-2004, 05:00 PM
#72
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I see in the other thread that the manifold is done already...but how did you build a double-wall manifold? I'm familiar with the weld-els from a buddy's project, but I'm having trouble picturing how you would build double-wall tubing yourself for the mani.
12-28-2004, 11:27 PM
#74
Originally Posted by Mr Project
I see in the other thread that the manifold is done already...but how did you build a double-wall manifold? I'm familiar with the weld-els from a buddy's project, but I'm having trouble picturing how you would build double-wall tubing yourself for the mani.
The main "log" is a heavily worked 18GA 2.5" pipe that is flattened and shaped to fit over the ports and direct the flow to the turbo inlet.
Then, I welded a second "layer of 18GA steel over the main tube and reinforced that with 1/16" steel strips.
Then, the whole thing is shielded with steel and aluminum plate.
