Twin Scroll on a Miata, anyone else do it?
09-01-2009, 03:33 PM
#1
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Twin Scroll on a Miata, anyone else do it?
Hey,
I am going to be putting a twin scroll evo xiii turbo on my miata in the coming months, im wondering if there is anyone else who has done this and can offer some advice. I spoke to someone from Full Race at a recent meet who told me that the EVO VIII turbo would not work properly on a miata because the exhaust is on the driver's side. He recommended i pick up an EVO X. My buddy who sold me the turbo knows a thing or two about them (he has a 900whp silvia, and has had several miatas). He told me that since the turbo will be mounted in such a way that it is essentially parallel with the top of the motor that that shouldnt matter. I dont know much about this stuff, so im wondering if anyone else has put a VIII turbo on their miata successfully because im lazy and dont want to go through the hassle of selling this and picking up an X if the VIII will work.
I am going to be putting a twin scroll evo xiii turbo on my miata in the coming months, im wondering if there is anyone else who has done this and can offer some advice. I spoke to someone from Full Race at a recent meet who told me that the EVO VIII turbo would not work properly on a miata because the exhaust is on the driver's side. He recommended i pick up an EVO X. My buddy who sold me the turbo knows a thing or two about them (he has a 900whp silvia, and has had several miatas). He told me that since the turbo will be mounted in such a way that it is essentially parallel with the top of the motor that that shouldnt matter. I dont know much about this stuff, so im wondering if anyone else has put a VIII turbo on their miata successfully because im lazy and dont want to go through the hassle of selling this and picking up an X if the VIII will work.
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09-01-2009, 03:47 PM
#2
I own one that I one day wanted to put on my TC. The main issue has nothing to do with the fact that its a dual scroll. The problem is that the downpipe flange is not perpendicular to the turbine inlet. Because it is angled at like 45deg or so it greatly limits the range that you can install it in. Also, I hope you got the smaller turbine housing. Most of them are rather large.
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09-01-2009, 04:07 PM
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yeah, the issue was never twin scroll. The X is twin scroll too. My question was more, why did the fact that the exhaust is on the drivers side in the miata make the guy from Full Race tell me to use an EVO X turbo instead of the VIII? Is it due to the downpipe flange being at that angle as you described? or is it because the turbine is designed to spin in the opposite direction or something like that?
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09-01-2009, 06:06 PM
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There was a huge post over on MR2OC a few months ago about the benefits of twin scroll on a 4 cylinder. The general consensus was that there is very little to be gained because the exhaust pulses are just to far apart.
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09-01-2009, 08:29 PM
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update: I just spoke to someone else who knows what i have, and knows what they're talking about. The reason why the kid from Full Race said that is because he was probably thinking that I was using a regular evo viii twin turbo manifold. I just went to the shop where MY manifold is being custom built and the guy I have building the manifold told me that the reason why it would "not work" is not true, it would work, but the full race dude was probably thinking that i was using a stock evo manifold which would require a ****-ton of modification to get it to go, and even then it would not work efficiently. My welder/tuner friend then went on to inform me that the guy from full race WAS RIGHT about the evo x turbo being a better idea, but only because it would be an easier job to do because it wouldnt 100% require me to have a completely custom manifold.
*sigh* idk, im just selling this thing
*sigh* idk, im just selling this thing
Last edited by Jike Spingleton; 09-01-2009 at 08:40 PM. Reason: frustrated.
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09-01-2009, 09:02 PM
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Seriously though, besides having the turbo, why do you want to use a twin scroll on the miata? If you want to be really different, go with a rear mount turbo. That would be cool as hell.
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09-02-2009, 03:18 AM
#16
update: I just spoke to someone else who knows what i have, and knows what they're talking about. The reason why the kid from full race said that is because he was probably thinking that i was using a regular evo viii twin turbo manifold. I just went to the shop where my manifold is being custom built and the guy i have building the manifold told me that the reason why it would "not work" is not true, it would work, but the full race dude was probably thinking that i was using a stock evo manifold which would require a ****-ton of modification to get it to go, and even then it would not work efficiently. My welder/tuner friend then went on to inform me that the guy from full race was right about the evo x turbo being a better idea, but only because it would be an easier job to do because it wouldnt 100% require me to have a completely custom manifold.
*sigh* idk, im just selling this thing
*sigh* idk, im just selling this thing
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