MX-5 NC with RX-8 231 Engine

[Grant Monkhouse]

This just came to me

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[Paul_13]

The engine is bridge ported. Might be the problem

[Grant Monkhouse]

I think the bridge port/tertiary ports open up around 7500 rpm based on the rotation of the sleeve.

That's what my bridge ported rx8 did. All on a stick ecu

The more you drive it the better the ecu compensates for the added air flow, its a smart ecu for what it is.

The problem is if you are watching the gauges all the time you are going to see things.

Best solution is to get rid of the gauge

Get some serious miles on the car and you will find that it goes away

With my bridged rx8 the "feel" of the engine power got better the more I ran it, possibly due to the engine bedding in and compression going up, but the transition of air and fuel delivery improved.

Best thing about it was that when the tertiary ports open you could feel the extra power come in and take you up to 9500 rpm without the power really dropping off

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[Paul_13]

So I swapped the exhaust manifold, same problem.
Played about with the maf curve and it was better.
I've hooked up a temp pressure gauge to monitor fuel pressure.

[Paul_13]

I have found the air leak..... Eureka

[Jamie R]

Go on ?


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[Paul_13]

https://youtu.be/XBbxvnvH95I

[Jamie R]

Nice one bud


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[Paul_13]

Need to catch up on your build thread later

[Jamie R]

Need to catch up on your build thread later

No rush it's just filler n grp, same old same old


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[Mr Spiller]

Happy days


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[Casey]

Nice detective work Paul 

[Paul_13]

Hmm

[Grant Monkhouse]

At a guess I'd say they're brokened

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[Casey]

Those could be a problem