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Old 10-09-2011, 09:33 AM   #1
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Default Need help with Bipes

Hi all
My miata is currently n/a, I have a turbo and ancillaries to fit from a crash damaged car that I bought.
I have taken the Bipes ACU from it already, and, using the instructions, I have fitted it so's I can get it working before the full turbo conversion. I have left off the CAS wires for now just so's I can use the settings to check that airflow and temp are working ok BUT it doesn't. When I set it to read airflow I'm getting all but one of the LED's lighting up, set to air temp, all light up. Set to revs, similar problem. I've checked and double checked the wiring and I assume the power side is fine as it lights up ok. Also double checked the switches on the rear are correct too.
One question would be, do I need to wire in the CAS for it to take these readings or should this diagnostic side work without. I'm getting quite frustrated at the moment.
Maybe I need to mention that it's a 1992 1.6.
Cheers
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Old 10-09-2011, 10:56 AM   #2
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Update. Just put a multimeter on the airflow connection of the plug for the ACU and across to a suitable ground and when I rev the car the voltage drops showing that it works up to that point. I can only assume that there's a problem with the ACU. How the hell do I get THAT checked out?
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Old 10-11-2011, 01:20 PM   #3
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Ha ha, it seems no one can help either side of the pond, oh well :(
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Old 10-11-2011, 01:27 PM   #4
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I guess ill be the first to say it:

Step 1: Remove BIPES
Step 2: Destroy so no human can ever use it ever again
Step 3: replace with Megasquirt or Adaptronic
Step 4: ???
Step 5: Profit
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Old 10-11-2011, 01:43 PM   #5
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Originally Posted by RozzaMan View Post
Ha ha, it seems no one can help either side of the pond, oh well :(
Sorry, we were all drunk over here yesterday. It was National Angel Food Cake Day.


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One question would be, do I need to wire in the CAS for it to take these readings or should this diagnostic side work without. I'm getting quite frustrated at the moment.
This is just a guess, but since the ACU uses both RPM and airflow/MAP to calculate its operating parameters, its quite possible that the lack of a CAS signal is indeed preventing it from operating.

There's certainly no harm in hooking it up to test whether this is the case.
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Old 10-11-2011, 02:43 PM   #6
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Originally Posted by 240_to_miata View Post
I guess ill be the first to say it:

Step 1: Remove BIPES
Step 2: Destroy so no human can ever use it ever again
Step 3: replace with Megasquirt or Adaptronic
Step 4: ???
Step 5: Profit

I WILL when I can afford to do so, I believe in the power of megasquirt but cannot afford to buy one and all the associated parts needed to get one set up properly. Or to pay someone to do it. Yet.

I'll bear your advice in mind though when I can
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Old 10-11-2011, 02:45 PM   #7
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Sorry, we were all drunk over here yesterday. It was National Angel Food Cake Day.


This is just a guess, but since the ACU uses both RPM and airflow/MAP to calculate its operating parameters, its quite possible that the lack of a CAS signal is indeed preventing it from operating.

There's certainly no harm in hooking it up to test whether this is the case.
Yeah, I should really just hook it up to check. 10 minute job eh?

Hope you didn't suffer too bad a hangover from the drinking
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Old 10-11-2011, 07:18 PM   #8
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I love these guys. "I have the money for a turbo but i don't have the money for the right ecu." Or better yet. "My car is surging under boost HALP....No i dont have a wideband but i'll get one when i get money."

Do it right man.
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Old 10-11-2011, 07:34 PM   #9
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I love these guys. "I have the money for a turbo but i don't have the money for the right ecu." Or better yet. "My car is surging under boost HALP....No i dont have a wideband but i'll get one when i get money."

Do it right man.
Good advice and maybe a bit condescending (I'll remember not to ask you stuff in the future as you've already written me off as a timewaster), but I still can't afford the 500 to 600 bucks to get the extras (what it would cost over here). I got the turbo and ancillaries from a rear ended scrapper I bought and it was fitted with the Bipes too, so there you go, I have the bits for a basic install. But thanks for the advice, I will still buy all the other stuff when I can afford it. Carpentry doesn't pay a great deal here in the UK.
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Old 10-11-2011, 07:39 PM   #10
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Sorry to say it how it is man. The consequence is blown motor. Can you afford that?

The engine is an assembly. Treat it as such. Basic setup doesnt exist.

Last edited by triple88a; 10-11-2011 at 07:51 PM.
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Old 10-11-2011, 08:17 PM   #11
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Sorry to say it how it is man. The consequence is blown motor. Can you afford that?

The engine is an assembly. Treat it as such. Basic setup doesnt exist.
Ah ok, I see where you're coming from. But don't Greddy sell the kit that you mount, set the timing to 6' BTDC, fit the AFPR and away you go, running on the standard ECU? Ok, you lose bottom end power but it's meant to be safe and I've not read bad stories about that one.
I'm asking as I'm interested, not to challenge your experience I hope you understand. The chances are that there are different experiences in the US from the UK, possibly from running a lot hotter in some states compared to this pissy windy country?
Anyway, cheers for your time so far.
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Old 10-11-2011, 08:31 PM   #12
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Its not about running 20 degrees hotter air temp. Honestly Greedy shouldnt even be on the market. Matter of fact, spend some more time here and you'll quickly see people throwing Greedy kits in the trash soon after installation and installing quality parts.

What will quickly throw your engine in the toilet is running lean and not knowing it. I've seen too many blown motor threads because people are too excited to install a turbo kit instead of research how it works in the first place. Wideband is required even for a low power kit. Start with reading the faqs before installing your turbo kit and you'll be happier in the long run.
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Old 10-11-2011, 08:42 PM   #13
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Its not about running 20 degrees hotter air temp. Honestly Greedy shouldnt even be on the market. Matter of fact, spend some more time here and you'll quickly see people throwing Greedy kits in the trash soon after installation and installing quality parts.

What will quickly throw your engine in the toilet is running lean and not knowing it. I've seen too many blown motor threads because people are too excited to install a turbo kit instead of research how it works in the first place. Wideband is required even for a low power kit. Start with reading the faqs before installing your turbo kit and you'll be happier in the long run.
Now I understand the reason for your earlier posts. I'll take this advice and use it, thanks again for taking the time to reply. I'll read the FAQ's before I do anything else, and of course start saving up to buy the bits
Cheers dood
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Old 10-11-2011, 08:49 PM   #14
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Also check out the ebay thread. Good stuff that explains why partial kits are no good.

https://www.miataturbo.net/prefabbed-turbo-kits-3/ebay-turbo-kits-19358/
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Old 10-11-2011, 11:26 PM   #15
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I am running a bipes and a begi fuel pressure boaster and seem to be doing ok.
What makes the Bipes trash?
Based on the lights it takes timing out just fine. it takes out timing the hoter the air charge. It seems to take out timing fine as I apply throttle. Based on what the led lights are indicating it seems to take out timing when I want it to.

I have no pinging or detenation that I can hear.

Why is Bipes trash?
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Old 10-11-2011, 11:30 PM   #16
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Why is Bipes trash?
Why use bipes when your standalone controls everything else?
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Old 10-12-2011, 07:12 PM   #17
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I will change when i can afford it but the bipes seems to work for now. I just cant go over 8psi because my injectors will not suport it no matter how much I bump up the fuel pressure.
Timings is over safe if anything.
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Old 10-12-2011, 07:21 PM   #18
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Just to be clear i have had a miata for 30 days. If I am wrong or missing something let me know?
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Old 10-13-2011, 07:00 PM   #19
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I dont see a wideband in your sig.
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Old 10-13-2011, 09:22 PM   #20
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Honestly Greedy shouldnt even be on the market. Matter of fact, spend some more time here and you'll quickly see people throwing Greedy kits in the trash soon after installation and installing quality parts.
The Greddy MX5 turbo kit is old. They were one of the first to market in the early 90s, and never really updated anything about the kit. It was made to a price-point, to be sure, and the accessories which it comes with are of noticeably lower quality than what you'd get from a high-end vendor like Bell.

But the trash? Well, I'll admit that's where the FPR and oil lines from mine wound up, but the manifold and turbo are still perfectly serviceable six years later.

Can you get bigger HP numbers and nicer-quality parts from elsewhere? Of course. I struggled to get 210 WHP out of mine, and that was pretty much the flow limit. But unless your name is Clarkson, it's a bit much to say that it's total garbage.


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What makes the Bipes trash?
The fact that it isn't the newest and hippest trend in engine management. Same reason that the iThing(x), which was the coolest device in the universe when you bought it, becomes a piece of garbage the instant that the Man in the Black Turtleneck (RIP) holds up the prototype of the new iThing(x+1) for a large crowd.






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