Where's Carloverx? I need an update!! I really want to know if you got a run with the VICS intake vs. Skunk2.
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Originally Posted by Mudflap
(Post 1492880)
Where's Carloverx? I need an update!! I really want to know if you got a run with the VICS intake vs. Skunk2.
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3 Attachment(s)
Build updates:
Assuming it doesn't rain, I will be headed to the drag strip tomorrow to see what it runs/traps. I'd love to see 118 mpg (best has been 116), but I wouldn't be shocked to be stuck in the mid teens. Below you will find a recent virtual dyno pull (yes, i will lean it out a bit) and current ignition map. Next Steps:
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This must be something obvious I'm missing here....? How would anyone run an external wastegate on this manifold?
https://cimg5.ibsrv.net/gimg/www.mia...f2297ccafd.jpg |
The manifold design with an external wastegate on the bottom is an old BEGi design from 2002 or so. It did not work very well because with the turbo inlet above the centerline of the ports, the exhaust gases are moving up away from the wastegate. This design crept a bit and did not last long.
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Time for a Kraken setup!
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Originally Posted by Carloverx
(Post 1494693)
I cannot rid the car of boost spike. I've got an extremely short amount of hose running in the system, have tried multiple manual boost controllers, and multiple waste gate and waste gate springs, but I simply cannot dial out the initial spike.
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Originally Posted by Ken Hill
(Post 1496931)
...is an old BEGi design... It did not work very well...
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Originally Posted by Ken Hill
(Post 1496931)
The manifold design with an external wastegate on the bottom is an old BEGi design from 2002 or so. It did not work very well because with the turbo inlet above the centerline of the ports, the exhaust gases are moving up away from the wastegate. This design crept a bit and did not last long.
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Originally Posted by SpartanSV
(Post 1496948)
Are getting your wastegate signal from the compressor housing? If so, that's likely your problem.
Originally Posted by ridethecliche
(Post 1496941)
Time for a Kraken setup!
Originally Posted by shuiend
(Post 1496963)
I also thought it was funny that China waited 15 years and then copied about the worst cast manifold that had been put on the market.
I知 swapping out my Flyin miata T2/internally gated manifold, for the Chinese T3/externally gated manifold shown above. I知 also going from a genuine GTX2867R to a Chinese GT35R. I was bored last weekend 😓 I purchased a small pipe to move wastegate further from the engine/turbo and will report back shortly. |
OK, but where are you getting your wastegate signal? It should be post intercooler pre-TB
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Originally Posted by SpartanSV
(Post 1496993)
OK, but where are you getting your wastegate signal? It should be post intercooler pre-TB
I was pulling it from my intercooler pipe, about a foot post turbo outlet, and a foot or two pre intercooler. Some say you want the lines as short as possible, but it sounds like having the source closer post intercooler would be worth the trade off of longer lines? |
Boost post intercooler is more indicative of what the motor is actually seeing, especially since there's some pressure loss post IC. That and also the IAT sensor is post intercooler so it makes the most sense to do what you can so that the wastegate and ECU are on relatively the same page when it comes to what boost they're seeing.
Originally Posted by Carloverx
(Post 1496970)
Sorry all, I should have been more clear. My boost spike problem is unrelated to that photo of the manifold/wastegate. I知 swapping out my Flyin miata T2/internally gated manifold, for the Chinese T3/externally gated manifold shown above. I知 also going from a genuine GTX2867R to a Chinese GT35R. I was bored last weekend 😓 I purchased a small pipe to move wastegate further from the engine/turbo and will report back shortly. Why didn't you just pull a Thirdgen and drill your FM manifold for an EWG? Also, why does it feel like you're semi-downgrading? |
Originally Posted by Carloverx
(Post 1497008)
I was pulling it from my intercooler pipe, about a foot post turbo outlet, and a foot or two pre intercooler. Some say you want the lines as short as possible, but it sounds like having the source closer post intercooler would be worth the trade off of longer lines? https://www.miataturbo.net/diy-turbo...eed-ebc-47532/ |
Originally Posted by SpartanSV
(Post 1497021)
Joe says you're doing it wrong. That man makes a compelling argument.
https://www.miataturbo.net/diy-turbo...eed-ebc-47532/
Originally Posted by ridethecliche
(Post 1497015)
Boost post intercooler is more indicative of what the motor is actually seeing, especially since there's some pressure loss post IC. That and also the IAT sensor is post intercooler so it makes the most sense to do what you can so that the wastegate and ECU are on relatively the same page when it comes to what boost they're seeing.
Why didn't you just pull a Thirdgen and drill your FM manifold for an EWG? Also, why does it feel like you're semi-downgrading? I am definitely downgrading as far as spool and quality of parts, but I知 bored, and can稚 stomach the thought of dropping $3K on a T3 manifold with an external wastegate, a genuine 35R, and additional exhaust parts, just to strake breaking drivetrain parts 😕. |
Originally Posted by Carloverx
(Post 1494693)
I don't think the turbo is what is holding you back. EDIT: holy cow you are running 23psi on pump gas (93oct)? I didn't know we could do that! E85!! |
Originally Posted by Carloverx
(Post 1496970)
I’m swapping out my Flyin miata T2/internally gated manifold, for the Chinese T3/externally gated manifold shown above. I’m also going from a genuine GTX2867R to a Chinese GT35R. And yeah, I'm not at all surprised you're hitting knock before the GTX turbo stops making power. --Ian |
Originally Posted by Mudflap
(Post 1497076)
You are knock limited then? Have you considered e85? you've got the pump and injectors already there. Also, what spark plug temp are you running? You may want to try colder plugs. Also, what IAT are you seeing? If you are pushing a lot of hot air (>160F) you may want to try water injection or a better intercooler.
I don't think the turbo is what is holding you back. EDIT: holy cow you are running 23psi on pump gas (93oct)? I didn't know we could do that! E85!! I can get away with higher PSI bc I’m running 8.4:1 compression. I will also be doing a substantial intercooler core upgrade in this go around. EDIT: I should also note: Part of my logic of this change up is: by diverting exhaust through the external wastegate, I'll reduce some of the shortcomings of a 2.5" exhaust |
One way or another, this is going to be hilarious
https://cimg1.ibsrv.net/gimg/www.mia...b45f7a70b8.jpg |
Why not just get a 3 inch exhaust...?
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