Paul's MX-5 NC with a 231 heart

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Phil Bate
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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Sat Sep 14, 2019 2:39 am

Paul_13 wrote:
Thu Sep 12, 2019 1:30 pm
One for Phil....

I was playing about with mazda edit and I selected the option to show all maps.

2 "hidden" maps popped up which grabbed my attention. Gear ratio A and gear ratio B.

20190912_132643.jpg
20190912_132622.jpg

Gear ratio A table doesn't have any descriptions but the values go up to 15.94 (I'm guessing AFR) between 4-5 (in guessing RPM) this may be why my AFR is going lean at that RPM?
I can't recall what those tables do exactly but I wouldn't go changing them at this stage - there's no reason your car shouldn't run properly with the standard map and modifying things to make it do so may just be hiding a problem. Let's see what it does now you have 100% more MAF screens. The only thing I'm concerned with though is you appear to have a step around the inner diameter of the intake tube where the first screen is mounted - this may cause some stumbling but let's see what happens with some fresh data.


Looking forward to seeing the exhaust finished - and good luck getting that Toyo manifold to seal :lol:
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sat Sep 14, 2019 8:53 am

Phil Bate wrote:
Sat Sep 14, 2019 2:39 am
Paul_13 wrote:
Thu Sep 12, 2019 1:30 pm
One for Phil....

I was playing about with mazda edit and I selected the option to show all maps.

2 "hidden" maps popped up which grabbed my attention. Gear ratio A and gear ratio B.

20190912_132643.jpg
20190912_132622.jpg

Gear ratio A table doesn't have any descriptions but the values go up to 15.94 (I'm guessing AFR) between 4-5 (in guessing RPM) this may be why my AFR is going lean at that RPM?
I can't recall what those tables do exactly but I wouldn't go changing them at this stage - there's no reason your car shouldn't run properly with the standard map and modifying things to make it do so may just be hiding a problem. Let's see what it does now you have 100% more MAF screens. The only thing I'm concerned with though is you appear to have a step around the inner diameter of the intake tube where the first screen is mounted - this may cause some stumbling but let's see what happens with some fresh data.


Looking forward to seeing the exhaust finished - and good luck getting that Toyo manifold to seal :lol:
I was trying to get hold of another rx8 maf screen as it doesn't cause a restriction. The one in there currently is an AEM item.

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sat Sep 14, 2019 10:11 pm

I've created a monster
20190914_212116.jpg
20190914_210930.jpg
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sat Sep 14, 2019 10:12 pm

Just waiting on the compensator from jetex.... Although I may just bolt it together tomorrow and start it to see what it sounds like

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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Sun Sep 15, 2019 1:09 am

This is very exciting =D>


Paul_13 wrote:
Sat Sep 14, 2019 8:53 am
I was trying to get hold of another rx8 maf screen as it doesn't cause a restriction. The one in there currently is an AEM item.

If you didn't manage to get hold of one, drop me a pm with your address and I'll post one out to you :thumleft:
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Paul_13 (Sun Sep 15, 2019 7:50 am)
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 2:27 pm

All back together. Not happy with the gasket arrangement
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20190915_140030.jpg
20190915_140009.jpg

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 2:30 pm

Rear lambda in.
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20190915_142940.jpg

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Re: Paul's MX-5 NC with a 231 heart

Post by Honkytonk » Sun Sep 15, 2019 3:05 pm

Me waiting for Paul to get some footage of this in action like
Image
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 3:56 pm

Trying to load up a vid but can't. Need to figure out how

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 3:56 pm

The seal actually worked... I'm amazed lol

Tail pipes should fit nicely. Trying to keep them away from underneath the car to stop drone.
20190915_143805.jpg

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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Sun Sep 15, 2019 4:27 pm

* and melting :D

With videos I upload to YouTube as unlisted and link from there.
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 5:26 pm


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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 6:21 pm

Screenshot_20190915-182036_Camera.jpg
Going to have to be so careful going over speed bumps. That's the highest I could get the pipework
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Re: Paul's MX-5 NC with a 231 heart

Post by Honkytonk » Sun Sep 15, 2019 7:40 pm

Image

Paul_13 wrote:
Sun Sep 15, 2019 6:21 pm
Going to have to be so careful going over speed bumps. That's the highest I could get the pipework
Scuff plate? Haven't spent much time under an NC so not sure if there's anywhere decent to mount it, but might save a little bit of the wince and protect the vitals. But then you're trading in a bit more height so...

EDIT: As an aside (I'm sure you're aware Paul, but in case the unsuspecting see that video), turning the Renesis on and off in that short a time span unless it's warmed up can cause flooding.
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 8:20 pm

I am aware... The daughter was being a pain and had to go in
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 9:53 pm

Err... Loud brings to mind. I don't know how to quieten it down any more lol.
On the other hand, flames a plenty. Lights up the road behind you briefly.

Still got the annoying clicking noise when I turn off. Must be the manifold.
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Sep 15, 2019 10:15 pm

Here's a bit of a monster log from tonights drive.

- rear o2 sensor installed
- closed loop is now on
- 2 maf screens installed
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log0005.csv
(859.21 KiB) Downloaded 3 times

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Mon Sep 16, 2019 5:39 pm

20190916_173824.jpg
Last piece of the puzzle is here

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Tue Sep 17, 2019 7:22 am

Looking at decibel reducers but looks like you need a straight run of 300mm pipe for the jetex items... Might just squeeze them in the tail pipes

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Wed Sep 18, 2019 5:23 pm

I just crapped my pants.

Oil level warning light come on.
Checked the oil level and its fine.

Did a Google and apparently mazda recalled my year of engine for faulty sensors

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Re: Paul's MX-5 NC with a 231 heart

Post by PeteH » Wed Sep 18, 2019 5:34 pm

Paul_13 wrote:
Tue Sep 17, 2019 7:22 am
Looking at decibel reducers but looks like you need a straight run of 300mm pipe for the jetex items... Might just squeeze them in the tail pipes
I have no direct experience, but the internet wisdom ( :? ) is that they create back pressure. It seems inevitable to me that they must. Back pressure is the nemesis of all rotaries (presumably including the Nemesis..), so I'd be inclined to avoid them if at all possible.
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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Wed Sep 18, 2019 11:15 pm

To be fair the Jetex one looks quite a bit less restrictive than the usual tip mounted chokes (and the standard rx-8 silencer design for that matter):



jet_db_insert_2.5.jpg
jet_db_insert_2.5.jpg (16.17 KiB) Viewed 65 times


I had been considering a pair mounted in the outlets of my Cobra silencer to create a pseudo-chambered arrangement but it looks like the angle of the pipes will stymie that idea. You might be alright poking them into your duplex box though :-k The only thing is they don't seem to do them in stainless [-X
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Thu Sep 19, 2019 6:48 am

Phil Bate wrote:
Wed Sep 18, 2019 11:15 pm
To be fair the Jetex one looks quite a bit less restrictive than the usual tip mounted chokes (and the standard rx-8 silencer design for that matter):




jet_db_insert_2.5.jpg



I had been considering a pair mounted in the outlets of my Cobra silencer to create a pseudo-chambered arrangement but it looks like the angle of the pipes will stymie that idea. You might be alright poking them into your duplex box though :-k The only thing is they don't seem to do them in stainless [-X
I welded up the back box so the tail pipes are one piece now. D'oh.

I think the duplex back box would be quiet enough if you had an additional /larger silencer compared to what I have currently. I literally cannot squeeze another in, the mx5 is a bit cramped in comparison to the rx8.
The duplex certainly flows well no doubt about that. Night and day difference compared to the last setup. 2 1/4" up to 3" is a huge improvement! :twisted:

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Sep 20, 2019 6:41 am

Low cars and dead deer aren't what you need first thing in the morning. Currently a smell of burnt venison coming up through the gear gaitor.

Big thanks to Phil for the maf screen, I'll be installing that later. I was doing a bit of testing this morning on the way to work the maf values fluctuate a bit when holding a steady cruise. Nothing drastic but probably caused by the odd maf screen

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Re: Paul's MX-5 NC with a 231 heart

Post by Honkytonk » Fri Sep 20, 2019 7:07 am

Oh jeez, deer are not insubstantial things, everything alright?

I suppose at least you could char broil it with the exhausts...
Have a gander at my slightly rusty pride and joy in
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