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-   -   Cx racing turbo kit installed now has rough idle and goes rich after start up (https://www.miataturbo.net/prefabbed-turbo-kits-3/cx-racing-turbo-kit-installed-now-has-rough-idle-goes-rich-after-start-up-97453/)

ryansmoneypit 11-14-2019 03:49 PM


Originally Posted by sixshooter (Post 1554826)
If you can't afford a set of injectors then you can't really afford and engine either, can you?

Sounds like you aren't ready to turbo your Miata. Not being harsh just pointing it out


I was tying this exact response, you beat me.

One who cannot afford to go out and buy 500 bucks worth of injectors, cannot afford a turbo miata.

SirSkripto 11-14-2019 04:45 PM


Originally Posted by ryansmoneypit (Post 1554837)
I was tying this exact response, you beat me.

One who cannot afford to go out and buy 500 bucks worth of injectors, cannot afford a turbo miata.

I bought the car with the turbo kit already on it, I'm not saying I cant afford the injectors, I'm just asking if I can RUN the car until I find which injectors I should buy, order them, and get them installed.

sixshooter 11-14-2019 05:00 PM

Yes you can run it. You will need to wire the wastegate flapper in the open position and hope that you do not have enough boost creep with the flapper open to go over your available fuel. The system will likely still generate a pound or two of positive manifold pressure. As has been the case before, sometimes you will end up with 8 or 10 lb of pressure even with the wastegate all the way open which is why people are cautious in their advice to you. Set your overboost protection at 4 or 5 lbs on your megasquirt.

SirSkripto 11-14-2019 08:58 PM


Originally Posted by sixshooter (Post 1554858)
Yes you can run it. You will need to wire the wastegate flapper in the open position and hope that you do not have enough boost creep with the flapper open to go over your available fuel. The system will likely still generate a pound or two of positive manifold pressure. As has been the case before, sometimes you will end up with 8 or 10 lb of pressure even with the wastegate all the way open which is why people are cautious in their advice to you. Set your overboost protection at 4 or 5 lbs on your megasquirt.

Alright thanks for the info

borka 11-14-2019 10:45 PM

The previous owner already ran it on the voodoo box for a while I'm assuming, so it's fairly safe to say you can drive the car without too much worry.

At wot, how many psi do you get at say 4-6k rpm?

SirSkripto 11-15-2019 01:20 AM


Originally Posted by borka (Post 1554883)
The previous owner already ran it on the voodoo box for a while I'm assuming, so it's fairly safe to say you can drive the car without too much worry.

At wot, how many psi do you get at say 4-6k rpm?

Yeah the previous owner drove it all the time (atleast he said he did)

8psi @ WOT

Leafy 11-30-2019 04:04 PM


Originally Posted by SirSkripto (Post 1554832)
So the previous owner set up a VooDoo box Piggyback on the stock ECU. The car is actually running really, really rich right now. Idling at about 11-12, WOT is 12-12.5, and cruising is 12-13 (On average). I bought a MegaSquirt but I need to cut out the Voodoo and resplice the wires I think because the car turned over but wouldnt stay on with the Piggyback still wired into the wire harness with the MegaSquirt on.

This makes it sound like they either already put in larger injectors or put in an aftermarket fuel pressure regulator and just cranked the base pressure way up (or did super janky shit like crimped the return line from the regulator). There's no way stock injectors at stock pressure can hit 12.5:1 at 8psi.


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