Megasquirt Project, .....IT RUNS ! Options

[Michelj13]

Hi,

Although I have been a member for a while (since I purchased my 914), I have not posted much. I still love my 914 and it's is interesting how this car drives like an absolute go-cart.

Anyway, my engine is a carbed 2270 that I built up with the help of many including Jake, and I am now embarking on a Megasquirt project. As many know, megasquirt is relatively inexpensive for a programmable FI system. I find, however, that there is too much information out there that it is nothing short of confusing. I want to share my progress so that at the end of the day, some may learn and may become less intimidated. Hopefully I will be successful....we'll see.

I have so many questions that I will post, along with some things that I have already learned. ANY and ALL comments appreciated.

I made a youtube video of my progress up to date. Enjoy!

http://www.youtube.com/watch?v=RoJfMZ9YgQc

Michel (IMG:style_emoticons/default/smile.gif)

[Mike Bellis]

I have built many EFI projects with various systems.

In my opinion, you need to get that off the bench and install it into the car. It appears you have it all working but there is no substitute for a working engine. You will not be able to tune anything on the bench like that. Get it on the engine and finish it up. Find a chassis dynometer in your area that you can rent time on. The bench cannot compensate for various load conditions.

You're sooooo close... Get r done!

BTW, I do appreciate seeing everything on the bench operational. (IMG:style_emoticons/default/smile.gif)

[cgnj]

Hi,

You may want to search Dave Hunts 2270 project. I believe that MS setup was blamed for the many of the problems on his build. But, if you succeed, I'm willing to follow in your footsteps.

Carlos

[aircooledtechguy]

Hi,

You may want to search Dave Hunts 2270 project. I believe that MS setup was blamed for the many of the problems on his build. But, if you succeed, I'm willing to follow in your footsteps.

Carlos

Dave's is back to Megasquirt and running better than ever. MS works well. My car is proof of that.

[cgnj]

Dave's is back to Megasquirt and running better than ever. MS works well. My car is proof of that.

Not able to find any updates on his project. Have a link? My recollection is there is a question regarding the restriction with a stock pleneum and running overly rich. I though he switched to ITB's and SDS

Carlos

[aircooledtechguy]

Dave's is back to Megasquirt and running better than ever. MS works well. My car is proof of that.

Not able to find any updates on his project. Have a link? My recollection is there is a question regarding the restriction with a stock pleneum and running overly rich. I though he switched to ITB's and SDS

Carlos

He switched to ITB and SDS. Then had issues with the SDS not correcting as he went up in altitude (he's not the only guy who's experienced that with SDS). He then switched back to MS with the ITBs and after some tuning, it appears to be running really good. His car was extremely quick ar WCR'11 in Medford. He's had MS back on it for at least a year and a half now.

[cgnj]

He switched to ITB and SDS. Then had issues with the SDS not correcting as he went up in altitude (he's not the only guy who's experienced that with SDS). He then switched back to MS with the ITBs and after some tuning, it appears to be running really good. His car was extremely quick ar WCR'11 in Medford. He's had MS back on it for at least a year and a half now.

Hi Nate,

Now this will turn to a STF thread. I was not aware of the change. It is as I expected though. Any thoughts or experience on using the stock or modified pleneum and runners? I've sat on the MS conversion since 2003. I guess I could ask my son to use his $140k engineering degree (that Mom and Dad paid for) to do some calcs for me. Trying to avoid the ITB route. I'm running Dell 45's and I'm older now. Looking to reduce the noise and support adding AC. I see MS as the answer and have believed should work for the last 9-10 years. Afraid to cook my motor. Dave's thread made me wary. I already have lots of intake noise, looking to reduce it.

Sorry for the hijack,

Carlos

[aircooledtechguy]

He switched to ITB and SDS. Then had issues with the SDS not correcting as he went up in altitude (he's not the only guy who's experienced that with SDS). He then switched back to MS with the ITBs and after some tuning, it appears to be running really good. His car was extremely quick ar WCR'11 in Medford. He's had MS back on it for at least a year and a half now.

Hi Nate,

Now this will turn to a STF thread. I was not aware of the change. It is as I expected though. Any thoughts or experience on using the stock or modified pleneum and runners? I've sat on the MS conversion since 2003. I guess I could ask my son to use his $140k engineering degree (that Mom and Dad paid for) to do some calcs for me. Trying to avoid the ITB route. I'm running Dell 45's and I'm older now. Looking to reduce the noise and support adding AC. I see MS as the answer and have believed should work for the last 9-10 years. Afraid to cook my motor. Dave's thread made me wary. I already have lots of intake noise, looking to reduce it.

Sorry for the hijack,

Carlos

How large is your motor?? I know that Jake has mentioned that it won't support much larger than a 2056cc at the higher end of the RPMs. The modified bus plenum with the 2.0L 914 runners I have in my shop car work fantastic. If your motor is larger, it's not hard to make a custom plenum and use a larger single TB from another car. It's all about sizing the plenum and TB for the motor you have. If you want, you can use the IAT sensor in the d-jet manifold, use all the injectors, the CHT sensor virtually everything for your MS conversion. You will have to make or buy an adapter for the TPS though and loose the D-jet TPS switch. All it takes is a custom wiring harness and a few hours laying it all out so it looks nice. I would highly recommend getting a 12' bundle of the engine harness wires from DIYAutotune to make your harness from. It will eliminate wiring stuff up wrong once it's all loomed together. Ask me how I know this. . . (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/rolleyes.gif)

One small piece of advice when wiring the VR sensor wires. Make the wires extra long and spin them with a drill so they are twisted as they go. This eliminates a lot of the noise that effects the signal coming from the VR sensor.

Another note on the VR sensor wires. If you go to start your bench tested system and find you have no spark AND no pulsing of the injectors, FIRST try switching the wires from the VR sensor. That thing ONLY works one way and everything is reliant on that signal for it all to work. Again, ask me how I know that too. . . (IMG:style_emoticons/default/rolleyes.gif) (IMG:style_emoticons/default/lol-2.gif)

I'm sold on MS. Carbs are a compromise. Distributors are a compromise. With MS, you have it all, 'cept you are stuck with whatever cam the motor is built with. If only someone would make cheap and effective solenoid operated valves, we'd be set!!