Megasquirt System on Supercharged Type 4, 2.0L with twin plug heads |
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Megasquirt System on Supercharged Type 4, 2.0L with twin plug heads |
poorsche914 |
Dec 20 2019, 08:59 PM
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#1
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T4 Supercharged Group: Members Posts: 3,093 Joined: 28-May 09 From: Smoky Mountains Member No.: 10,419 Region Association: South East States |
EDIT Swapped out the engine with my 2056 so I could drive this car. I plan on installing a MegaSquirt system on the supercharged engine.
-------------------------------------------- After failing to get the supercharged T4 engine running properly with the progressive Weber originally installed, I am ready to go the Megasquirt route. In talks with the owner who had this 914 in the early/mid '90s, it has been determined that this setup has never run well. He had a euro auto shop tune it and they got it to run somewhat decent but never reliable. I am hoping a modern FI system will bring this unique build to life! Below is my MS parts list: MS Wiring Harness # # from thedubshop.net * already have from used fuel-only MS system I bought ** I need eight coil packs since I plan to use the twin plug setup *** I am thinking of going with (4) of the Lambda sensors (one at the end of each tube of the heat exchangers) so that each cylinder can be individually tuned. Is that something MS supports? Is it even necessary? From what I've read, for a stock setup it is not needed but I am thinking with the supercharger it may be useful. (IMG:style_emoticons/default/confused24.gif) Current SC setup is, from top to bottom: Carb > SC > Plenum > Runners > Heads The intake runners are modified runners from the single Weber kit - slight bends to fit from heads to center-mounted plenum box. My idea is to have stock runners similarly modified so that the new setup would be: TB (mounted on custom plate similar to how carb is currently mounted) > SC> Plenum > Runners > Injectors > Heads I am hoping a tunable fuel injection system is what this engine needs. And, if not successful, I will remove the SC and run the engine as a twin plug. Anything I am missing? Anything I don't really need? I am ready to gather together all the parts I need and start putting it together first of the year. EDIT: This particular project postponed til I have more time. Thanks! steve (IMG:style_emoticons/default/driving.gif) |
Mark Henry |
Dec 21 2019, 11:41 AM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
How's the engine? Best induction system in the world won't compensate for a fuched engine.
The reason mcmark sticks with the 1.7 is it has smaller head bore and thick cylinder walls for sealing, for a 2.0 head seaing won't like much boost. |
poorsche914 |
Dec 21 2019, 12:04 PM
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#3
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T4 Supercharged Group: Members Posts: 3,093 Joined: 28-May 09 From: Smoky Mountains Member No.: 10,419 Region Association: South East States |
How's the engine? Best induction system in the world won't compensate for a fuched engine. The reason mcmark sticks with the 1.7 is it has smaller head bore and thick cylinder walls for sealing, for a 2.0 head seaing won't like much boost. This is an engine built by RPM in Daytona in the late '80s. From the magazine coverage: B&M 66 cid Roots-type blower yielding 6lbs boost at 5800rpm blueprinted case, crank and con rods shuffle pins used to limit vibration around central main bearing at high rpm Mahle P/Cs 8:1 cr Dual valve springs Progressive 2-barrel 36 DFAV Weber carb When I got the car, it had been sitting for the last 3 years and the engine was seized. I got it to turn and have had it running with the carb (rebuilt) but compression on #2 is at ~110 while the other three are ~130+ I am going to pull the engine and repair the issue with #2 before installing the MS system. (IMG:style_emoticons/default/driving.gif) |
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