924Board.org

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

Pre TB gives boost only. Post give boost and vac. Former is recommended. Latter if you want to see vac on the boost gauge, but what is that info worth?

If increasing boost you also want to monitor your AFR and knock with quality devices. Or your motor will be akin to a grenade with a rusty pin. It will go bang, just a question of when
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

I tee'd my vac/boost here, next to what I remember being the IAT sensor. I ran the hose through the firewall along the big bunch of wires in front of the driver side.

I think vacuum readings nifty but that's just me. Here's a vacuum diagnostics chart, and who the hell says "nifty" anymore?

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1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.

kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

VEMS, just over twice the price of a decent WBO2 setup..

Vems Display dashboard on android

Sequential Control of up to 8 banks of injectors

Built in transistorised coil igniters for up to 8 coils

Built in Wideband controller

Turbo friendly features such as Exhaust Gas Temperature, Anti-lag, and boost
control

Configurable control of low and high current drivers for lights, relays and solenoids, including up to 4 solenoids for VVTI / VANOS / Camshaft-angle control (optional: 4 Hi-Side PFET drivers eg. for BMW S54)

Datalogging via serial connection or optional SD card interface

Advanced Idle Air Control

Throttle position

Coolant temperature

Air temperature

Crank and Cam sensors

Manifold Pressure through a choice of built-in pressure sensors, or an external
OEM type

External fuel and exhaust pressures

Integrated Wideband O2 Controller utilizing the low cost Bosch LSU4 sensor

Up to 2 Exhaust Gas Temperature sensors

Variable cam timing solenoids (VANOS, VTEC, VVT etc)

Nitrous solenoids

+++ ???

The thing would log and display on a simple tablet (no gauges$) real time everything I could imagine running CIS and be able to take over spark and fuel if/whenever I decided to ditch the CIS and go coil on plug or whatever..

Even save maps and swap the brain between unlimited cars/bikes/anything with an engine so I could run any/every machine I have with it but just 1 at a time.. And I could use it as an advanced diagnostic tool to watch anything on any car..

Starts at 496.4 euro, All the goodie options I could ever need shipped to me for $800 USD..

Dutchpug's 350 something HP 924 NA, raceboy's 300hp? NA 924, both on stock internals.. I think its proven..

Now how much does just WBO2 setup + a knock detector + a boost controller + gauges cost in comparison?

No brainer... I'll do without until I can afford the whole enchilada at a price that smears just monitoring CIS..

I could just sell off my perfectly functioning CIS components and other obsolete parts to fund it... I just don't want to take that big of a bite right now, I'm chewing with all my might allready..
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80 Turbo - Slightly Modified

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

MS scares me.. Complex, too DIY, soldering boards, I can't code or understand code, you have to understand why/how it does what it does in order to get it to do what you want it to do, multiple systems, etc..

VEMS, one box of black magic that does everything by clicking buttons not requiring me to understand a great deal of computer functions and coding..

How would you go about unplugging your MS from your Porsche and plugging it into your turbo eg33 subaru tuned ready to go for either? Then to a Triumph speed triple?

I want EASY and VALUE..
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80 Turbo - Slightly Modified

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

I meant running multiple cars/engines with the same ECU so I only have to buy one..

Maybe MS is easier than I think, you should know much better than I..
Wiring sensors and all that sounds like cake, I'm not scared of that, circuit boards are scary..

You recommend MS over VEMS for a first time standalone tuner/installer?
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80 Turbo - Slightly Modified

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

IC finally on the way.. ETA Thu, Jun 25..

Sold a couple hundred bucks worth of my Bitcoin day trading profits (+13000% gain

) for Porsche pieces, I just can't wait any longer.. Can only spend it on Ebay tho..
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80 Turbo - Slightly Modified

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

I feel that the tiny nipple on my S1 TB for boost/vac signal is overtaxed and I don't want to add even more volume requirements to it..

I am going to be connecting under the manifold to the original BOV/pop off valve vacuum signal nipple for my boost/vac signal as this port is nice and big and the closest to the intake valves giving me the truest boost/vac readings..
I'll adapt it down to 3/8 line or so and run it into the cabin to the dash speaker port..
I have my WG top port line sorted, using the original smaller AC hose that comes into the cabin, I pulled it up from the drivers side firewall and put it back down the passengers side over the bellhousing right to the WG, the metal end in the car comes into the passengers side of the dash speaker area and I'll couple to that with a hose..

I'm only going to run one boost/vac signal line from under the manifold and its going to go like this...

Manifold-line-boost/vac gauge-check valve-regulator-gauge-WG

I'm putting a check valve after the boost vac gauge before the regulator so the regulator and WG top port never see vacuum but get the boost signal and its held there.
I believe this will also keep pressure to the top port at the set regulated level while the engine is showing vacuum helping hold the WG closed while gaining boost again between shifts.

I also want to run a 0-15 psi gauge on the WG side of the regulator just to see whats going on there, I expect to see WG top port gauge pressure + .45 bar spring = what the WG bottom port has to overcome to open the WG. IDK, we shall see how it works in practice rather than theory.

I'll be running with nothing to the WG top port for a while until my tuning and modifications are proven before I touch on boost control..

A local speed shop specializing in carbureted chevy engines I think has a portable exhaust AFR sniffer and I think they'll be happy to take some runs with me as they seem quite interested in my car..
I can't wait to pull in there with my big FMIC and straight pipe SSsweeeeww turbo whistle to do some AFR testing/tuning, I'll be so proud..

There's a neat curvy hillclimb just a mile away from my house and I had a friend in a camaro following me (well trying) going up and he said all he could hear was turbo. He has v6 5 speed and had no chance keeping up with me up the hill WOT on just stock S1 boost with no IC and S2 turbo.. Yes I flogged it a lot before all this IC shenanigans and it proved itself..
Now with S1 turbo, IC, and maybe a bit more boost I think even a V8 camaro will be easily embarrassed but I have a lot of work yet to do, waiting on pieces..
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80 Turbo - Slightly Modified

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

HAPPY CHRISTMAN BIRTHDAY NEWYEARS HALLOWEEN TO ME!!!!!!

IC HAS ARRIVED!!!!
2 days early..
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80 Turbo - Slightly Modified

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Yup I tweaked some fins... I'll go back and straighten em out later the best I can.. See how its face is almost flush with the lower valance, its actually pulled down to it quite a bit tightening it onto its mount from the bottom..

You can tell that hood stays up a bit eh? look at the dust difference, lol..

All looks original under the hood except the BOV, yes the pop up lights and washer bottle and everything remain untouched...

Bunch of crowded pipes, see the turbo tag, also the connection to the bottom of the lower charge pipe..

Very crowded area there infront of the turbo compressor, lot going on thats for sure.. I need to customize that lower RAD hose a bit, moving the rad back made it kink a bit, its OK but I'll pull it and shorten it eventually, maybe flat out replace....

RAD spacer/IC mount/oil cooler mount turned out awesome.. Probably won't weld it up, wouldnt want to mess it up..

I need to shorten one of those pipe 90's there so the pipe across the steering rack isn't pushed down low like it is, where that couple with the crooed hose clamp is, that middle hose clamp actually is a mount and its crooked to pull forward a bit because it needs shortened inside that coupler..