Roadrunners SE

Chat to do with your MX5/Miata/Eunos Garage Ride(s).

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Nevyn72
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Re: Roadrunners SE

Postby Nevyn72 » Fri Sep 26, 2014 12:37 pm

I tried to look at what I had done but short of removing a whole lot of trim panels there's no way to see on my car..... :|

I would do one of two things in your case to move the intercooler slightly forwards to increase clearance;
- put a couple of washers between the vertical part of the mounting bracket and frame mounts.
- re-tap the holes on the horizontal part of the bracket to move the bolt holes mating with the top of the intercooler slightly towards the front of the car.

You could still add the sleeve to the black frame for added protection from contact.

I do remember that I had my Mania supplied bracket mounted in the same way as Lokiel, with the vertical part of the bracket rising at the rear of the intercooler rather than the front as you have done. Hope this helps...... :wink:
"A Convertible has a top you can put down when the weather's nice...... A Roadster has a top you can put up when the weather's bad."

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Roadrunner
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Re: Roadrunners SE

Postby Roadrunner » Fri Sep 26, 2014 9:02 pm

Had a quick play tonight and was able to lift the whole unit up a few cm which has swung it forward a bit giving about 1cm clearance.
Good enough for me :D
Tomorrow will be finishing it all off reinstalling the bumper
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Re: Roadrunners SE

Postby Roadrunner » Sat Sep 27, 2014 5:21 pm

All done!!
Image

Looks a million times better than the puny factory job.
I overcame the contact with the lower brace by lifting the whole unit up on the bracket mount I made. This moved the intercooler forward a touch as it pivots in the hard pipes mounting point.

We all know this story now with the SE's but still:
Yuk!! Nice pool of oil
Image

Went for a drive and all is good.
One thing I did notice, is something other owners have mention but something I haven't experienced until now. Boost creep
Full throttle the gauge sits on 7psi but as soon as I hit the 5000rpm mark and get that kick of fuel, the gauge jumps straight to 10psi??
Not a cold day either, 27deg at the filter, 40 post cooler.
Will give it a good run tomorrow but I didn't think the intercooler would have any effect (if anything introduce a but of lag but no noticeable difference there)

But at least now I look like a turbo car lol
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Nevyn72
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Re: Roadrunners SE

Postby Nevyn72 » Sat Sep 27, 2014 6:53 pm

Roadrunner wrote:All done!!


Great, I bet you're glad it's finally in and you can show off the car's face without embarrassment....... :mrgreen:

Roadrunner wrote:Went for a drive and all is good.
One thing I did notice, is something other owners have mention but something I haven't experienced until now. Boost creep
Full throttle the gauge sits on 7psi but as soon as I hit the 5000rpm mark and get that kick of fuel, the gauge jumps straight to 10psi??
Not a cold day either, 27deg at the filter, 40 post cooler.


Strange..... I'm sitting on basically the same combination of performance mods as you, using the same boost gauge, and only ever see a rock solid 7.5psi..... :|
Usually boost creep will only come into play if you have replaced the intake, exhaust and installed a MBC.

Where do you source the vacuum for the boost gauge?
Mine comes from a barb on the top of the plenum previously connected to the PCV so is definitely the actual boost pressure at the intake.
"A Convertible has a top you can put down when the weather's nice...... A Roadster has a top you can put up when the weather's bad."

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Re: Roadrunners SE

Postby Roadrunner » Sat Sep 27, 2014 7:46 pm

Going for a big drive tomorrow so will get to check it out fully rather than the 2minute blast onto the freeway and back.

Gauge is plumbed off the bov signal line at the back of the engine. Always been rock solid from there.
I'm definitely getting more power when it jumps up though, so it's not a false reading in the gauge.
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Nevyn72
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Re: Roadrunners SE

Postby Nevyn72 » Sun Sep 28, 2014 10:28 pm

Had the chance to play, errrr........ quite a bit today with the boost levels on my SE........ :wink:

Definitely only getting a rock solid 7.5psi boost registered on my gauge.
When the ECU goes open loop beyond ~4500 RPM (ie. provides the extra fuel) the only change is the turbo whine goes up a few octaves in pitch!

Are you still running the factory ECU controlled EBC or do you have a MBC installed?
"A Convertible has a top you can put down when the weather's nice...... A Roadster has a top you can put up when the weather's bad."

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Re: Roadrunners SE

Postby Roadrunner » Sun Sep 28, 2014 10:42 pm

Factory boost control still.
Guess I'm not to bothered by it, just a strange observation.

Had a full days run today and constantly hit 10psi between 5000rpm and redline.
Kinda funny considering I use to get boost dropping off in the higher range, now I'm getting an extra kick :lol:
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Nevyn72
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Re: Roadrunners SE

Postby Nevyn72 » Sun Sep 28, 2014 10:51 pm

Roadrunner wrote:Factory boost control still.
Guess I'm not to bothered by it, just a strange observation.

Had a full days run today and constantly hit 10psi between 5000rpm and redline.
Kinda funny considering I use to get boost dropping off in the higher range, now I'm getting an extra kick :lol:

Strange, boost creep is normally characterised by a steadily increasing boost level, whereas yours levels off at 10psi..... :?

Sounds more like a bit of a gremlin with your EBC (possibly the boost sensor? Would explain the previous drop-off too perhaps?) but with a nice positive result.
I'd simply just accept it and not argue as you've achieved what a lot have done without the expense of a MBC, re-chip or ECU upgrade, I'd call that a win! :mrgreen:
"A Convertible has a top you can put down when the weather's nice...... A Roadster has a top you can put up when the weather's bad."

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Re: Roadrunners SE

Postby Roadrunner » Sun Sep 28, 2014 11:32 pm

Iv had a few questions regarding the intercooler install, I won't go over too much that's already covered in other install threads, but here's some photos.

The intercooler I used is the 27x5.5x2.5 inch one from JustJap with 2inch to 2.5imch silicone couplers.

Here it is next to the tiny little factory unit.
Image

I used some slotted angle from bunnings as the bracket the intercooler mounted too.
Image

Then I used two lengths of strapping to mount from the angle to the screws on the bonnet latch
Image

This combo allowed me to align the holes and slide along the slotted angle to lift and level the unit

The mounts for the power steering lines can unscrew into two halves. Discard the lower half the intercooler mounted to and wiggle the top half along until it lines up with a screw hole. This moves it well up out of the way.
A bit of bending and pushing on the lines to clear the cooler.

Reinstall bumper and done

A few notes:
-Lift the cooler up first before mounting it to the bracket :oops:
-Measure twice, cut once, but allow yourself a bit of room between intercooler and hard pipes.
-Stuff a rag into the pipes before cutting to stop shavings going everywhere up the pipe. They are coated in oil and full of surface rust so is tedious to clean.
-The factory pipes are slightly bigger than 2inch so the silicone joiner is a very tight fit. Use a bit of something to lube the pipe first. It's very hard to move once on.
-remove the horns to get more access to behind the intercooler when installing. With this height unit the horns don't interfere.
-keep track of what screws, nuts and clips come from where! There's ones that aren't reused, move them away so your not looking for where they go :oops:

Before:
Image

After:
Image
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Re: Roadrunners SE

Postby Roadrunner » Sun Sep 28, 2014 11:35 pm

Nevyn72 wrote:Strange, boost creep is normally characterised by a steadily increasing boost level, whereas yours levels off at 10psi..... :?

Sounds more like a bit of a gremlin with your EBC (possibly the boost sensor? Would explain the previous drop-off too perhaps?) but with a nice positive result.
I'd simply just accept it and not argue as you've achieved what a lot have done without the expense of a MBC, re-chip or ECU upgrade, I'd call that a win! :mrgreen:


Haha yeah free boost controller.
I have seen it on really cold mornings, but now it's 7.5psi from down low to 5000odd rpm then straight to a solid 10psi all the way (not far lol) to redline.
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Re: Roadrunners SE

Postby Roadrunner » Sat Oct 11, 2014 3:34 pm

After seeing for myself just how much oil was swimming in the factory intercooler, and with another track day coming up, I got MX5Mania to get in an oil return line check valve from Flyin Miata.
This stops oil from being forced/sucked back up the drain line into the factory catch can air separator when cornering hard to the left while on boost.
A proper catch can in the future will stop all oil vapours getting back into the intake, but this valve will stop oil from the sump being sucked up into the system to begin with.
Install was really simple. In fact easiest thing iv installed on the car.

Simple unit
Image

Remove the splash guard to expose the sump (this was the most time consuming part)
Image

Here's the return line.
Image

Remove the rubber funnel shaped pipe and the brass joiner from the upper hose
Image

Trim 3/4 inch off the upper pipe and refit the brass joiner.
Trim 1/4 inch off the smaller end of the funnelled pipe.
Put the valve in collar up in between and clamp down.
Image

Refit everything and your done!
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Re: Roadrunners SE

Postby WASP » Sat Oct 11, 2014 6:12 pm

hi I would be interested as to the difference in performance with the new intercooler, what do you feel through the seat of your pants, not outright HP figures
Cheers
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Re: Roadrunners SE

Postby Roadrunner » Sat Oct 11, 2014 7:32 pm

Difference in kw performance or the butt dyno, straight up is zero.
While that sounds bad the bigger intercooler does make a difference in hotter temperatures.
Daily driving temps stayed within 10-12degress of ambient which is exactly what I had with the factory cooler, but yesterday in the hotter temps it still stayed in that same range, were as the factory unit would go up to 15-20 degs difference.
So essentially it's not heat soaking which is good for performance (hot air = bad)
Once you get into constant spirited driving or especially track work the factory cooler heat soaks in a heartbeat.

I'll be able to test it out at the next track day in two weeks time, though I don't have much to compare with, as the last time I went (first time ever) the outside temperature was about 6degs until midday and post factory intercooler temps were 4degs cooler than at the filter :?
It was bloody cold :lol:
Last edited by Roadrunner on Sat Oct 11, 2014 7:43 pm, edited 3 times in total.
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Re: Roadrunners SE

Postby Roadrunner » Sat Oct 11, 2014 7:35 pm

Plus it's worth doing just for the looks!
The factory unit looks so lame :lol:
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Nevyn72
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Re: Roadrunners SE

Postby Nevyn72 » Sat Oct 11, 2014 8:29 pm

Roadrunner wrote:Plus it's worth doing just for the looks!
The factory unit looks so lame :lol:

Bingo! :mrgreen:

BTW, not trying to make you paranoid or anything, but..... I hope you installed that valve the right way around..... :wink:
"A Convertible has a top you can put down when the weather's nice...... A Roadster has a top you can put up when the weather's bad."


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