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Old 08-16-2007, 09:34 PM   #1
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Default Almost ready... Help me the last few yards!

I get my Aviation bonus here in about a month and the wife has given the go-ahead... gonna sell my entire "bandaid setup" to help fund. Also gotta solve my clutch "situation" so I can turn up the power. My wiring harness dilemma is no more... I'm just gonna suck it up and fix it in place.

First, does anyone have an electronic file of the PnP manual they could post up. I see lots of references, but want to look at it?

As I understand it, the MSPnP requires a few more things to really work right. First thing is injectors. 550's seem to be universally recommended over 440's just for the overhead and they're the same price used.

Also need IAT sensor for MAF delete (of course). I see about 5 different styles of IAT on the DIY website. Which one is it? Do I need a connector or do I just find some same-gauge wire and splice it into the appropriate input on the harness?

Same for the CLT... not sure if inclusion of this is mandatory. How exactly is the CLT feed calculated... what is it used for... do I need one?

Ive got an LC-1... same routine as IAT, right?... just splice into NB input on wiring harness?

VariTPS is recommended, but haven't seen a PnP list of ones that will work. Is there a reccomendation on which OEM cars to salvage out of. A picture of what one looks like would be awesome. How necessary is it?

I plan on incorporating EBC. Please give me about 2 sentences on what to buy and how the wiring works.

Please read this thread:
https://www.miataturbo.net/showpost....5&postcount=7\
I'm pretty sure I have a '93 Cali car. First, how do I check by looking to know if it is in fact Cali? Second, EXACTLY what do I need to do to the car or MS to make sure it works right.

What else am I missing for full PnP functionality? Is anybody in the process of doing a "PnP Install Sticky" that covers all the "other" things you need to do like what I'm asking in this thread. Maybe it's all covered in the Install Manual... I searched for awhile, but I don't know a resistor from a football, so all the technical jargon is totally lost on me.

Guru's do your thing! Thanks!
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Old 08-16-2007, 09:41 PM   #2
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For iat you want the open caged sensor, for clt you want the closed cage sensor. You should just get the sensor with pigtails made for them, make wiring things up much faster.

For the lc1 you have it correct.

The tps isnt really needed unless you want to use it with boost control.

For the mspnp manual you just need to go to www.megasquirtpnp.com and all the manuals and everything are on the site.
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Old 08-16-2007, 09:44 PM   #3
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you want a GM ait, and the LC1 will go direct to the WB wire on the MS unless the PNP has piggied the harness somehow. A auto 1.6 miata will fit the Variable tps bill, but you need the TB as well. the rest others will answer hopefully.
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Old 08-16-2007, 11:15 PM   #4
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Variable TPS

Buy this: http://cgi.ebay.com/ebaymotors/ws/eB...129886657&rd=1

It's what I'm using. Works great. Bolts right onto your manual TB. All that you need to do is the wiring. I can help with which pin is what if you need.
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Old 08-16-2007, 11:17 PM   #5
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From context I believe your are going with the PNP version, not making your own. If this is the case, I should be fully qualified to answer all.

The full manual is at www.mspnp.com

Yup, you'll want some injectors. Size depends on goals of course. No need for 550s unless you're going for over 300whp. Something in the upper 300s-lower 400s will do you fine for more modest ambitions. My last dyno run--the only time I've dyno'd with the MS on the car--showed low 70's% injector duty cycle with my RC 440 cc/min high z injectors. I hit 255whp on the dynapack. I'm already bumping into minimum injector on times with the 440s, so I would not want to have to go bigger unless I absolutely had to. The PNP will run lowZ injectors, so if I were shopping I'd be looking for something like the black top supra turbo injectors (low z, 440cc).

You'll get the IAT sensor from DIY when you get the MSPNP, so don't sweat it. FWIW, it's a GM open element. The only thing you need to concern yourself with is steel or aluminum sensor bung. Choice will depend on composition of your throttle body pipe.

MSPNP uses the factory coolant temp sensor located at the back of the head. Nothing extra necessary here.

There are 2 options for connecting the LC1 to the MS. Both are explained in the manual. You will not use the NB sensor with the MS and LC1.

Real TPS is the ****. Since you have neither A/C nor a superlight flywheel, it won't be as necessary in your car for idle valve control. But it will still help make your idle stabalize real nice when you come to a stop. It also does neat stuff for boost control and also datalogging. It is worth doing. Atl93LE has a thread you can search for where he lists a BMW TPS (with part no) that is as easy to install as it gets.

Jerry has provisioned the MSPNP to be compatible with CA sequential injection cars. Shouldn't be a problem, but it won't be a bad idea to touch bases with him on the issue.

EBC is the ****. You'll need a 3 port solenoid such as the GM Typhoon/Cyclone sensor. Get it from DIY if they have any in stock, if not they are at the Chevy dealer or GM Parts Direct. It will require running 2 wires, one is +12V the other is ground and goes to the center plug of the MSPNP. I sourced +12V from the diag connector; simply opened the connector, spliced the +12V pin (I think it's called B+), and closed the connector again. The wiring looks stock. The ground wire gets run to the cabin to the PNP, which will control the solenoid by adding/removing ground.

Open loop boost control works great, no complaints. I've played some with closed loop control and it seems like it works well too. But I'm yet to give it a gold star just because I haven't played with it enough yet. But boost by throttle position and boost targets do seem to work correctly. Closed loop control adds 2 safety nets: Boost cut with high intake temp and boost cut with knock. Closed loop is not possible w/o the TPS.

I had some ground issues. I would recommend beefing up the ECU grounds proactively. Just run 3-4 16ga wires from the pass footwell through the grommet by the washer bottle to the back of the head by the fuel rail. There are 2 sensor grounds there, you'll see them both. Remove the hardware, clean the area the grounds contact with a dremel or similar, and attach the wires you ran with some ring terminals. Use one of those wires for your LC1 and gauges. The others are for extra ECU grounds. These extra grounds are good to have, especially if you're going to have things like boost control and low z injectors.

Get yourself a knocksenseMS. It will run you just under $100 shipped, but adds real active knock sensing and logging to the MS. The MS can lessen advance and cut boost with knock. Good stuff. I didn't order it, but mine came with the LED as well, which will flash with knock events.

Also search for Atl93's thread about the Palm software for MS. I haven't located my Palm, but I saw his. Very nice package. It's something I keep meaning to get around to.

Long thread. Payback. I'm going to go drink a beer now.

B
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Old 08-17-2007, 12:14 AM   #6
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and let us not forget my patented super pimp dual stage cooling fan mod.
https://www.miataturbo.net/megasquirt-18/problem-cooling-fan-mod-10324/
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Old 08-17-2007, 12:32 AM   #7
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Thanks a lot for the answers. Breaking it down like that was exactly what I needed. I am indeed going PnP.
My questions regarding Injectors(looking at 440's now), IAT, LC1, EBC, variTPS, and Cali'93 wiring are all answered.

I have read several threads that talk about guys using a CLT sensor. What does it do for you the stock sensor does not? Do I need one?

Ben, thanks for re-iterating the point about grounding. I will do some homework into Knocksense.

I think that does it for now... just waiting until I get paid, then sell off my old stuff, buy new clutch and MS simultaneously... and join the club!

I'll be back with more questions though... don't think that's the end of me in this forum!
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Old 08-17-2007, 09:11 AM   #8
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Quote:
Originally Posted by samnavy View Post
I have read several threads that talk about guys using a CLT sensor. What does it do for you the stock sensor does not? Do I need one?
Not on an MSPNP. Some parallel installations used a second coolant temperature sensor rather than go through the hassle of sharing one sensor between two computers, but on an MSPNP this is not an issue.
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