s5 6 port turbo.. who's done it? questions inside
I've been thinking about a high compression turbo and I just came across a Holset from a friend's Dodge, he upgraded so I got it for practically free, and was wondering if it would work.
I've been told for a 9.4:1 4 port a T3 might be a little limiting with a small A/R but it's a 21cm^2 hotside which is just under 1.15 if my research is correct, only found info on a 22cm^2 which is 1.15 and 18cm^2 which is 1.00. Just wondering if that would work? I am willing to run a big wg or even a pair if needed, I just think for a free turbo this would be great.
I've been told for a 9.4:1 4 port a T3 might be a little limiting with a small A/R but it's a 21cm^2 hotside which is just under 1.15 if my research is correct, only found info on a 22cm^2 which is 1.15 and 18cm^2 which is 1.00. Just wondering if that would work? I am willing to run a big wg or even a pair if needed, I just think for a free turbo this would be great.
Awesome, I was told the .83 I was looking at would choke around 6.5k and didn't know if the t3 on this one would limit flow.
I plan on maybe some form of street port, don't want a lot of overlap on a turbo if I want low end torque if I understand right, and was wanting about 300-400whp, I've got great access to e85 around here which should help, while trying to stay under about 1 bar. If I end up with less at the wheels, I'll live. I've just been dying to build up a high comp turbo block.
I plan on maybe some form of street port, don't want a lot of overlap on a turbo if I want low end torque if I understand right, and was wanting about 300-400whp, I've got great access to e85 around here which should help, while trying to stay under about 1 bar. If I end up with less at the wheels, I'll live. I've just been dying to build up a high comp turbo block.
Thread Starter
Joined: Jun 2006
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From: Kenosha area, WI
I just wanted to give an update and let everyone know that my 6 port is still alive and kicking. Planning on putting on a rotary extreme v-mount on over the winter and then probably a retune. I should also note that my clutch is almost dead. looks like i'll be investing on a south bend stage 3 endurance clutch kit.
Full Member
Joined: Jun 2015
Posts: 141
Likes: 10
From: Alabama
Im running 10 psi on my S5 6 port setup you dont need to change the front cover you only need to drill out the hole for the drain and the bolt holes are already tapped
I don't know how much power im making, basically i used my piston train of thought and dropped one degree of timing for every 1 psi, its worked for the last 10,000 km's or so of very hard driving
im using the n/a computer with an emanage but im sure that a standalone would be much much better
to give you an idea I ran an evo X on the highway from 120 km/h by the time i was at the top of 4th i had 7-8 car lengths on him thats with a shitty 2 1/4" single side exhaust lol
im planning on adding water injection this spring and seeing how far i can take the stock turbo on my car
I don't know how much power im making, basically i used my piston train of thought and dropped one degree of timing for every 1 psi, its worked for the last 10,000 km's or so of very hard driving
im using the n/a computer with an emanage but im sure that a standalone would be much much better
to give you an idea I ran an evo X on the highway from 120 km/h by the time i was at the top of 4th i had 7-8 car lengths on him thats with a shitty 2 1/4" single side exhaust lol
im planning on adding water injection this spring and seeing how far i can take the stock turbo on my car
I'm building a 6 port turbo S5. I plan on keeping my air pump, 5th and 6th ports, and ACV. I want to run a greddy emanage ultimate in order to keep my stock ecu to control my 5th/6th ports. I have not yet seen anyone done this so I want to give it a shot lol
Rotary Freak
Joined: Jul 2016
Posts: 1,837
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From: Beeton, Ontario
Which manifold and turbo are you using? I'm probably doing something similar but I was going to use a TII LIM and UIM to make the spacing easier and partially control the Secondary/Aux using a solenoid to actuate the secondary throttle butterflies at the desired RPM. It would be more effective if I could avoid changing intakes and just use a spacer, but clearance seems too tight depending on which turbo I pick (I won't notch the frame.) I'm also curious to see how effective the eManage is, although the cost of a Megasquirt is still pretty reasonable.
Full Member
Joined: Jun 2015
Posts: 141
Likes: 10
From: Alabama
Which manifold and turbo are you using? I'm probably doing something similar but I was going to use a TII LIM and UIM to make the spacing easier and partially control the Secondary/Aux using a solenoid to actuate the secondary throttle butterflies at the desired RPM. It would be more effective if I could avoid changing intakes and just use a spacer, but clearance seems too tight depending on which turbo I pick (I won't notch the frame.) I'm also curious to see how effective the eManage is, although the cost of a Megasquirt is still pretty reasonable.
Rotary Freak
Joined: Jul 2016
Posts: 1,837
Likes: 597
From: Beeton, Ontario
I've got an S4, so I have a mechanical OMP. Ah, I've been quietly hoping a cartech kit would come up near me, but they are so rare and expensive it might be easier and cheaper to just go with the T2 intake. Otherwise, I can always try buying the flanges and having a custom manifold welded.
Full Member
Joined: Jun 2015
Posts: 141
Likes: 10
From: Alabama
I've got an S4, so I have a mechanical OMP. Ah, I've been quietly hoping a cartech kit would come up near me, but they are so rare and expensive it might be easier and cheaper to just go with the T2 intake. Otherwise, I can always try buying the flanges and having a custom manifold welded.
Rotary Freak
Joined: Jul 2016
Posts: 1,837
Likes: 597
From: Beeton, Ontario
I saw that ad, but considering the cost of the entire kit and the glacially slow pace I am taking with the build, I'm not about to drop that kind of money. I'm trying to accrue every part I need slowly over the next few months (or years) to keep cost down, and then wait for my engine to need a rebuild before I turbocharge it. I'll see what results are like with the TII intakes and the secondary butterflies controlling secondary+aux transition, and if it isn't to my liking I can always go back to the NA intake and use a spacer.
Full Member
Joined: Jun 2015
Posts: 141
Likes: 10
From: Alabama
I saw that ad, but considering the cost of the entire kit and the glacially slow pace I am taking with the build, I'm not about to drop that kind of money. I'm trying to accrue every part I need slowly over the next few months (or years) to keep cost down, and then wait for my engine to need a rebuild before I turbocharge it. I'll see what results are like with the TII intakes and the secondary butterflies controlling secondary+aux transition, and if it isn't to my liking I can always go back to the NA intake and use a spacer.
Rotary Freak
Joined: Jul 2016
Posts: 1,837
Likes: 597
From: Beeton, Ontario
Similarly, the easiest way to test once one of us has completed the build is to dyno with them closed and then dyno with them open. Then you know that where the lines cross is where they should open up (the transition point), and how much power you are gaining.
I saw that ad, but considering the cost of the entire kit and the glacially slow pace I am taking with the build, I'm not about to drop that kind of money. I'm trying to accrue every part I need slowly over the next few months (or years) to keep cost down, and then wait for my engine to need a rebuild before I turbocharge it. I'll see what results are like with the TII intakes and the secondary butterflies controlling secondary+aux transition, and if it isn't to my liking I can always go back to the NA intake and use a spacer.
But as someone who has had a TII swap, LS1 swap, NA stuff, and RX-7's for the past 15 or so years, I recommend taking a look at a complete kit (like mine) or a TII engine/partout. I used to try to take it slow to amass parts to resell them, never use them, or buy the "wrong part". Funny how much I was nickle and dimed trying to save money.
Do as you wish, but you realize the $2,000 bucks I'm asking is a drop in a bucket after you're done building one of these things and how many times you're going to spend the same money over and over again doing it.. You're gonna have a blast either way though!
Rotary Freak
Joined: Jul 2016
Posts: 1,837
Likes: 597
From: Beeton, Ontario
Maybe because it's my ad. I shouldn't comment.
But as someone who has had a TII swap, LS1 swap, NA stuff, and RX-7's for the past 15 or so years, I recommend taking a look at a complete kit (like mine) or a TII engine/partout. I used to try to take it slow to amass parts to resell them, never use them, or buy the "wrong part". Funny how much I was nickle and dimed trying to save money.
Do as you wish, but you realize the $2,000 bucks I'm asking is a drop in a bucket after you're done building one of these things and how many times you're going to spend the same money over and over again doing it.. You're gonna have a blast either way though!
But as someone who has had a TII swap, LS1 swap, NA stuff, and RX-7's for the past 15 or so years, I recommend taking a look at a complete kit (like mine) or a TII engine/partout. I used to try to take it slow to amass parts to resell them, never use them, or buy the "wrong part". Funny how much I was nickle and dimed trying to save money.
Do as you wish, but you realize the $2,000 bucks I'm asking is a drop in a bucket after you're done building one of these things and how many times you're going to spend the same money over and over again doing it.. You're gonna have a blast either way though!
I haven't read this entire thread, but Aaron Cake has some good advice on this conversion.
https://www.aaroncake.net/rx-7/4PortLIMTo6Port.htm
https://www.aaroncake.net/rx-7/4PortLIMTo6Port.htm
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