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Old 11-16-2015, 06:44 PM   #1
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Default manifold comparison

Is there any point in some kind of manifold comparison?

there are a lot of turbo manifolds out there and personally think it would be cool to do a dyno test with the same car and different turbo manifolds.
same engine same boost settings and ecu tune same dyno etc.

Of course this may be something only a magazine might do and I dont know of any miata magazine!
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Old 11-16-2015, 07:39 PM   #2
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I ma gathering up different turbos and manifolds to do that vary thing in the spring.
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Old 11-16-2015, 07:40 PM   #3
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I was thinking about doing this for the trackspeed kit to bench against artech (top mount ram horn).

I just can't seem to get a price for just the manifold and downpipe, versus just the manifold or entire kit.

I'd have the downpipe adapted to fit the existing exhaust and it'd literally just be swapping two components and slight modification to charge pipe.
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Old 11-16-2015, 07:51 PM   #4
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I have the following turbo's that I plan on testing V-Band Tial GT2781, EFR 6258 t2 flange, 2554, T3 china charger. I was planning on testing the following types of manifolds with as many of those turbo's as possible. Lowmount absurdflow ramhorn, mkturbo top mount log, TSE manifold, TacoTaco 1.8 manifolds, lowmount AC/PS absurdflow.
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Old 11-16-2015, 07:59 PM   #5
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you win
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Old 11-16-2015, 08:07 PM   #6
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This has me thinking that there really should be a miataturbo magazine.
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Old 11-16-2015, 08:08 PM   #7
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Quote:
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This has me thinking that there really should be a miataturbo magazine.
Would make excellent reading material while pooping.
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Old 11-18-2015, 02:43 AM   #8
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This has me thinking that there really should be a miataturbo magazine.
I agree also with lots of reader submitted cat photos.
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Old 11-18-2015, 07:43 AM   #9
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Can we change this thread to MT.net - The Magazine?
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Old 11-18-2015, 10:20 AM   #10
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Unless you change just 1 thing at a time and do controlled back to back tests, I think the results will be nearly worthless.

I've not seen huge changes between different manis on a miata, probably because a miata BP usually doesn't breathe well, doesn't make crazy power, and usually responds better to freeing up the flow on the intake side than exhaust.

...But it'd be cool to see, thats for sure. I've seen a couple tests over the years, I think Bell did at least 1, and it was something like 5-8hp difference and slightly better curves on a long tube vs a log, and the "short runner response" that people typically advertise with the short runner manis can't really be seen on a dyno plot....
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Old 11-18-2015, 10:28 AM   #11
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Quote:
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This has me thinking that there really should be a miataturbo magazine.
it's called: playgirl.
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Old 11-18-2015, 10:42 AM   #12
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Old 11-18-2015, 10:54 AM   #13
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Quote:
Originally Posted by 18psi View Post
Unless you change just 1 thing at a time and do controlled back to back tests, I think the results will be nearly worthless.

I've not seen huge changes between different manis on a miata, probably because a miata BP usually doesn't breathe well, doesn't make crazy power, and usually responds better to freeing up the flow on the intake side than exhaust.

...But it'd be cool to see, thats for sure. I've seen a couple tests over the years, I think Bell did at least 1, and it was something like 5-8hp difference and slightly better curves on a long tube vs a log, and the "short runner response" that people typically advertise with the short runner manis can't really be seen on a dyno plot....
The plan is to use the same car and dyno for all the tests. The only changes will be the manifold, turbo, and downpipes. I will be doing some fuel tuning for different setups, but probably will not change my spark map at all. Testing will be spread out over a good amount of time though. Won't be back to back on the dyno on the same day, unless I have several setups ready to go at once and have the time. The big downside for doing multiple tests on a single day is downtime waiting for stuff to cool to swap hardware. I have a suspicion that downpipe design has a large part to do with how well the turbo's work. I think the 90 degree bend the majority of setups use right off the back of the turbo kills spool and flow. One thing I want to test is my log manifold with the normal top mount orientation I do, and then one where the turbo is put in the same location on the log, but a low mount. I should be able to make the downpipe much straighter with no 90 degree bend.

My TacoTaco 1.8 manifolds came in yesterday. I did not noticed until this morning. So I will be taking a look at them this afternoon when I get home.
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Old 11-18-2015, 10:58 AM   #14
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Curious to see how those work out.
The design couldn't be any more moronic.
I mean, seriously, a character from idiocracy could have designed better runners, but whatever, at least they made a cast 1.8 finally
I cannot comprehend why they didn't just change the bolt patter on the old 1.6 and call it a day
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Old 11-18-2015, 11:24 AM   #15
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Quote:
Originally Posted by 18psi View Post
Curious to see how those work out.
The design couldn't be any more moronic.
I mean, seriously, a character from idiocracy could have designed better runners, but whatever, at least they made a cast 1.8 finally
I cannot comprehend why they didn't just change the bolt patter on the old 1.6 and call it a day
I really want to find the foundry that is making them in China. Then send them one of my weld el log manifolds and be like. Copy this in cast iron. Sell them to me at the same price. We all profit.
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Old 11-18-2015, 06:42 PM   #16
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T3 1.8 TacoTaco. I will most more later.
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Old 11-18-2015, 06:55 PM   #17
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I might loan you a gtx2867r for such a test.
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Old 11-18-2015, 07:27 PM   #18
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lol

at least it fits, I guess
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Old 11-19-2015, 01:01 AM   #19
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Quote:
Originally Posted by shuiend View Post
I really want to find the foundry that is making them in China. Then send them one of my weld el log manifolds and be like. Copy this in cast iron. Sell them to me at the same price. We all profit.
Thats a great idea. I dont know why they came up with this odd looking design. It looks like it fits ok what do you think? Any flaws you see right off?
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Old 11-19-2015, 10:07 AM   #20
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Quote:
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Thats a great idea. I dont know why they came up with this odd looking design. It looks like it fits ok what do you think? Any flaws you see right off?
I ended up not going back to the garage last night and playing with the manifolds. The T2 and T3 are the same except for how the holes for studs are drilled. The biggest thing I noticed was that the front 2 and rear 2 stock studs are not long enough. You would either need to use bolts there or get longer studs. I am hoping tonight I get some more time to spend bolting a turbo on and testing fitment of them. I think the downpipe will need a very tight 90 degree bend.
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