Newbie
#1
![UK](https://www.rx8club.com/images/icons/ukflag.jpg)
Names nathan got a 192bhp rx8
Looking to pull some more power out of it
Been looking at turbo and supercharger kits. Not sure what to go for tho.?
Anyone with any info etc.?
Looking to pull some more power out of it
Been looking at turbo and supercharger kits. Not sure what to go for tho.?
Anyone with any info etc.?
#2
The Stink w.o The Sause
iTrader: (5)
greddy is the cheapest and has most support/upgradability/info
supercharger is the reliable to expensive way
I would get a full 3 inch exahust and an intake if you have not already ... by full 3 inch ... I mean proper connections (3 inch) ... NOT factory connection points ... so it has to be custom ... AFAIK there are not aftermarket exhausts made with 3 inch joins
supercharger is the reliable to expensive way
I would get a full 3 inch exahust and an intake if you have not already ... by full 3 inch ... I mean proper connections (3 inch) ... NOT factory connection points ... so it has to be custom ... AFAIK there are not aftermarket exhausts made with 3 inch joins
#4
Senior Member
iTrader: (1)
I'm not sure which is best. There aren't many threads on this topic and no one has really posted extremely detailed examples of what they did for their builds and why. Even if there was information here, they really don't provide an easy way to find what you may be looking for.
I really wish we did have plenty of information already and a way to just search for it with little to no effort at all but that is, sadly, not the case, apparently.
I wish you luck!
I really wish we did have plenty of information already and a way to just search for it with little to no effort at all but that is, sadly, not the case, apparently.
I wish you luck!
#5
The Stink w.o The Sause
iTrader: (5)
If you don't mind replacing engines then sure, turbo is better ... if you want to minimize side seal spring wear and weakening while upgrading power, go for a supercharger.
Turbo is cheaper and more available
Supercharger is more expensive and less available
Its easier upgrading a turbo system down the road, but turbo wears your engine significantly more, maybe this is why more people sell turbo systems than supercharger systems.
It's your car, you decide what's better.
Turbo is cheaper and more available
Supercharger is more expensive and less available
Its easier upgrading a turbo system down the road, but turbo wears your engine significantly more, maybe this is why more people sell turbo systems than supercharger systems.
It's your car, you decide what's better.
Last edited by stinksause; 12-21-2012 at 06:50 AM.
#6
Senior Member
iTrader: (1)
If you don't mind replacing engines then sure, turbo is better ... if you want to minimize side seal spring wear and weakening while upgrading power, go for a supercharger.
Turbo is cheaper and more available
Supercharger is more expensive and less available
Its easier upgrading a turbo system down the road, but turbo wears your engine significantly more, maybe this is why more people sell turbo systems than supercharger systems.
It's your car, you decide what's better.
Turbo is cheaper and more available
Supercharger is more expensive and less available
Its easier upgrading a turbo system down the road, but turbo wears your engine significantly more, maybe this is why more people sell turbo systems than supercharger systems.
It's your car, you decide what's better.
#9
The Stink w.o The Sause
iTrader: (5)
I'm by no means an expert, but why would a supercharger be more reliable? Why would it cause less side seal spring wear? I'm legitimately curious because I haven't heard those specific arguments before. My question is also under the assumption that you are comparing similar power/boost.
Let's take an s/c and turbo system of equal power
You generate more heat and pressure (in the manifold) in a turbo system because you need to drive the turbine. In a s/c system your exhaust gas is free flowing out. Side seals are known to be the weakness in our engines (there are many threads covering this). When you add even MORE heat from the turbo system, you accelerated this failure.
I am not saying that a s/c will not affect durability, you still introduce more wear, but not as much as the turbo system.
Pretty sure that's factory
Last edited by stinksause; 12-21-2012 at 07:11 AM.
#12
A turbo will make around 100hp every 7-10hp stolen from the engine, a supercharger makes 100hp for every 30 or more hp needed to spin.
A turbo always makes more sense on a small displacement, high revving engine. With newer technlogies and blade designs turbos can also be defined as "better" in all cases.
#13
The Stink w.o The Sause
iTrader: (5)
Your point is true for a PP exhaust rotary with a larger seal crossing the exhaust port than our engine that is plagued with weak side seals; introducing more heat will cook them further.
I agree with you on the parasitic power losses, but since you have less back pressure, I believe you will end up with throwing less heat at the side seals and your engine will last longer.
I guess we can agree to disagree.
Nath, here you go ... there is still a lot of discussion like this on a lot things with respect to the rx8, you will have to choose who you believe and what you do. Unfortunately, we can all agree that F.I is really the only way to get more than 220 whp out of the car.
like the low mount greddy manifold with the tiny t25 flange?
You are saying this will be a smaller issue for say a top mount T4 flange?
I agree, but I think the issue will still be present but it will be larger than that if you had a s/c
I agree with you on the parasitic power losses, but since you have less back pressure, I believe you will end up with throwing less heat at the side seals and your engine will last longer.
I guess we can agree to disagree.
Nath, here you go ... there is still a lot of discussion like this on a lot things with respect to the rx8, you will have to choose who you believe and what you do. Unfortunately, we can all agree that F.I is really the only way to get more than 220 whp out of the car.
You are saying this will be a smaller issue for say a top mount T4 flange?
I agree, but I think the issue will still be present but it will be larger than that if you had a s/c
Last edited by stinksause; 12-21-2012 at 07:25 AM.
#14
Senior Member
iTrader: (1)
http://www.pettitracing.com/wp-conte...lureTheory.pdf
Let's take an s/c and turbo system of equal power
You generate more heat and pressure (in the manifold) in a turbo system because you need to drive the turbine. In a s/c system your exhaust gas is free flowing out. Side seals are known to be the weakness in our engines (there are many threads covering this). When you add even MORE heat from the turbo system, you accelerated this failure.
I am not saying that a s/c will not affect durability, you still introduce more wear, but not as much as the turbo system.
Let's take an s/c and turbo system of equal power
You generate more heat and pressure (in the manifold) in a turbo system because you need to drive the turbine. In a s/c system your exhaust gas is free flowing out. Side seals are known to be the weakness in our engines (there are many threads covering this). When you add even MORE heat from the turbo system, you accelerated this failure.
I am not saying that a s/c will not affect durability, you still introduce more wear, but not as much as the turbo system.
Unless I'm mistaken, an improved turbo selection would avoid this problem, correct?
Eventually, the supercharger would require an upgraded exhaust too if it was able to flow enough air. Since the turbo becomes a part in the exhaust system, you have to consider that it will hinder exhaust flow based on certain factors. If that article suggests anything, it's that you should consider the appropriate turbocharger based on your goals for tuning and consider the various ways it could affect reliability. I don't think this is a problem that is inherent (to significant levels) for all turbochargers.
I would agree and disagree. They do plug their services, but they don't make any references to an alternative option (their SC) to turbochargers. If they had done that, then I would say it's obviously just marketing.
#15
Your point is true for a PP exhaust rotary with a larger seal crossing the exhaust port than our engine that is plagued with weak side seals; introducing more heat will cook them further.
I agree with you on the parasitic power losses, but since you have less back pressure, I believe you will end up with throwing less heat at the side seals and your engine will last longer.
I guess we can agree to disagree.
I agree with you on the parasitic power losses, but since you have less back pressure, I believe you will end up with throwing less heat at the side seals and your engine will last longer.
I guess we can agree to disagree.
How about a top mount turbo? Completely different scenario.
Back pressure is a myth in general and is nothing in general when compared to the increase in dynamic pressure that any forced induction introduces inside the chambers.
Yeah, all in all we can agree to disagree.
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