Some work on the 2 liter build (air filter and engine mount)

Wally · Post by **Wally** » Sun Mar 08, 2009 11:33 am

As of the installation of the 2 liter 914 engine with the EFI and dry-sump, I had to run without engine rubber due to the dry-sump pump.

So I bought T2 engine mounts that are used on the ends of the rear engine hanger and made a bracket from 3,5mm zinc plated steel:

Since I had a little too high intake temps (log showed it), I have rerouted the air intake to the original place: inside the fresh air box:
The 3" K&N filter needed a little clearencing of the plastic 2-door intake box, but I made it fit eventually

Tomorrow test drive to work

Hulken · Post by **Hulken** » Sun Mar 08, 2009 11:56 am

Looking cool! Do have more pictures? Plenum, throttle body, rest of EFI stuff and dry sum??? What kind of EFI are you using?

Wally · Post by **Wally** » Sun Mar 08, 2009 12:50 pm

Hulken wrote:Looking cool! Do have more pictures? Plenum, throttle body, rest of EFI stuff and dry sum??? What kind of EFI are you using?

Sure, its basically a stock 2.0 914 engine. That is where the plenum is from. I converted to a Ford 2.0 Sierra Throttle body however. Ecu is from DTA (www.dtafast.co.uk)
Dry sump is just a Schadeck pump. I made my own DS tank (its on the right in engine bay.

This was with the old air intake set-up:

Hulken · Post by **Hulken** » Sun Mar 08, 2009 2:46 pm

I've been considering a S40, but it's a bit too expencive for me at the moment. I'll be picking up a MegaSquirt II v3.0 tomorrow, hoping it will do it's duty. Are you running S40 or S60? Let us hear the result of the rearrangement of the airfilter, looks like this would be an option for me too. It might also gain a few extra hp's?

Post by **doc** » Sun Mar 08, 2009 3:20 pm

Nice, Wally. Fit looks pretty tight!!

doc

Bill K. · Post by **Bill K.** » Sun Mar 08, 2009 4:40 pm

Interesting setup Walter. Your ingenuity ceases to amaze me

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What is the hose/valve connected to the inlet air before the TB do?

Wally · Post by **Wally** » Mon Mar 09, 2009 11:09 am

Thanks guys, Bill

The car is very silent again with the rubbers I can report! So I am very happy with that

Bill,
The hose is what is letting the LPG into the air intake. Its connected to a 'mixture ring' that mixes the air with the vapourized LPG gas. Its pretty restricting, but will do for now. With the current 110 hp it won't matter much anyways. The cooler air does matter for stable running when the outside temperatures go up.
Testing went very well today, but the LPG supply is just like a carb, so tuning it is never really ideal for all circumstances.
Remember: I start on patrol, full efi/ignition, then after a few miles and a tiny bit of heat in the engine, I switch to the much cheaper LPG and the engine is still on crank fire, but LPG is drawn in like a carb-operation and patrol injector pump and fuel lines are cut/switched off. The carb-like vapourizer will be remedied as a fuel delivery source hopefully at the end of the year when the LPG will be injected in vapour form as well. Probably by some neat Bosch CNG injectors I saw somewhere here

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The thing on the right where the hose comes from is the 'vapourizer' which is heated by the low pressure oil from the dry-sump routing

Arild, I use the S60, but that is only because I hope to use twin spark some day...The S40 is just as good and quite a bit less costly indeed. The awesome closed loop fuel control is what made me get one over the E48 I had before. It is SO cool to just set your target AFR (in a 20x10 map!) and see that the ecu add/subtracts just the right amount while your driving!! and create a correction map for you to agree or not on that should adjust the actual fuel map so the ecu doesn't need to adjust the nect time your out.
Its wicked technology and makes everybody a top tuner

Sorry for the rave...

raygreenwood · Post by **raygreenwood** » Mon Mar 09, 2009 3:27 pm

That sounds very cool. I have been lurking about Propane/natural gas for a while.
How well does your 02 sensor work in that shallow curve tailpipe? I ahve always been worried about installing one there due to potential oxygen contamination. Ray

Wally · Post by **Wally** » Tue Mar 10, 2009 2:24 am

raygreenwood wrote:
How well does your 02 sensor work in that shallow curve tailpipe? I ahve always been worried about installing one there due to potential oxygen contamination. Ray

Many have asked this, but it is very accurate. I can 'feel' the torque changing if too lean or much too rich occurs and the LM1 shows this very well. It also respons in th eright way to tuning, so I can value the accuracy pretty well I think.
The reason for contamination is always caused by reversion of the exhaust gas flow. Most all aftermarket cams have this to some degree when you use a longer than stock duration.
I have a stock cam that has a valve opening about at TDC, not much if any before TDC, vice versa with the exhaust opening wrt BDC.

Thats my reasoning anyways