Anyone in here gone EFI on the flat four motor?

Well my 2.0 type 4 motor went in last week for strip down and parts odering and I've been playing with the idea of Motorbike ITB's (independant throttle bodies) installed on custom manifolds.

I can pick up a set of Suzuki GSX-R 600 ITB's for a good price and they already come with the map sensor and TPS. I can convert that to run on a local EFI standalone unit, but I was wondering if anywayone has done this on a flat four motor before?

Manifolds, injectors, wiring harness and ECU arem't any problem.

Anyone's Ideas?

Sounds like a good idea. I have no mechanical knowledge in that area but have lived with big Webers a few years and while they are great, I think modern fuel injection on a today's torquey Type 4 would be greater still.

Gary,
Several of the people on the spyder site have gone with different types of EFI on the flat fours. With varying success from nice driver glad they did it to an undrivable frustrating pig.

Check the spyderclub.com site and contact the members directly for more information.

angela

Gary, It's been done before. Look on shoptalkforums.com, search fuel injection forum. Great eye candy but there are much simpler methods.

Gary: Lot

Gary, I have megasquirted my Type 1 and managed to fit it into my speedie. I went the hard way and built the computer, relay, and the intake manifold. About done with it, but figuring out how to understand the computer geek concepts made my head spin. It is like trying to learn a new language.

The motor starts great with no unburnt fuel smell. With my laptop, I can set the AFR and timing advance to whatever I desire. Nice! I have no distributor, and us the Ford EDIS system for spark. No stumble from a stop, ever! Programmable EFI rules, and, with enough tweeking, will make a Type 1 start and run like a factory car. I am in the stage of my build where tweeking becomes an obsession. Wife just wants me to finish it so we can go cruising on nice summer evenings.

Go to www.megasquirt.info to get an idea of what is involved, and www.msefi.com to have a look at the forums. The fuel injection folks on www.shoptalkfourms.com are also great. There are some really smart people out there!

Chuck

Many thanks for all of the replies guys.....I'm cruising through shoptalkforums right now as we speak.

I was looking into motorbike itb's because of their price, I think the sizes are 36/38mm, but I can also get toyota RSi ITB's which are 48mm, for about double the price.

I don't want to try and revive an old vw/ porsche EFI system, I want to start fresh, I'm no newcomer to conversions and aftermarket EFI systems.

Locally a standalone EFI is cheap right out of the box and it has tonnes of features that I'll probably never use.

Well my 20 minutes ran out, so I had to log in again.

I think that 600cc motorbike ITB's are deff not going cut it..........lol.However 1000cc has 42mm and a 1200cc has 42mm, so I'm going to see what ZXR Kawazaki Ninja 1400 Can send my way, if I can get a set of 45mm tb's then I'll be happy.

I've already collected D16 Honda 270cc injectors and and Honda Fuel rail that I'm planning on chopping into two and tapping them for all of the fittings, I actually don't see any major problems with this entire set-up, in fact the biggest problem will be fabbing the parts.

We are VERY limited in South Africa with what we can choose, so I'll have to scavenge old vw's and see what I can make work.

Stay tuned.

Gary, the only word of advice that I can give to you is to consider going with a single TB rather than with mutiple TBs. Admittedly, multiple TBs look really sexy, like the dual Webers. However, people who go with multiple TBs always have a problem getting them precisely synchronized. Precise synchronization is vital to get the motor to idle at normal rpms. Then, multiple TBs will not stay synchronized over time. My 2180cc has one Holley 48mm TB on a central plenum and long runners. The throttle response is immediate and strong.

I went to Megasquirt because I did not want to fool around with my dual 44IDF Webers anymore. Also, the driveability of PEFI is much better than with any carburetor.

Chuck

Gary, a fellow on the spyderclub site did use motorcycle bits to build his EFI system. I don't remember what the bike was, but it was large displacement, maybe suzuki hayabusa? Don't recall.

You might also check this site - Clewett.

http://www.clewett.com/
angela

Hey Chuck

Thanks for the advice, I must admit that I was going for the bling factor of the twin ITB's, but the more I look around, the more people I see that are having problems with the set-up of them.

If I go single TB, then I have a lot of options as I can then buy a unit from a manufacturer with the TPS and MAP sensors already on the unit which sinplify things a lot.

I am going for drivability over anything else and that is more important than having the hood popped open to show of the bling.

Hey Angela/ Steve

Thanks for that link, I'm looking at is as we speak. I think that the GSX-R 750 has 45mm TB's. Which is also a nice size.

I love the black spyder...........I take it that it's yours/ Steve's???

Very nice.......

Gary, who the spyder belongs to depends on who you ask... The title says Steve, the 11,000 plus miles say its mine because 10,500 of them are with ME driving!

angela

85% of the engines we build are now fuel injected... Some kits are more troublesome than others, especially on the TIV engine. Some searches on other forums can be of great use when selecting the kit that will be best for you.

I offer a very comprehensive kit for the TIV engine, I run it in my personal cars and love it because it is so simple and easy to tune..

Vehicle registrations are specific state to state, but at least, here in California, the ONLY way I would ever register a vehicle is in both my name and my wife, with an "OR" in between. The advantage being EITHER ONE of you can sell or dispose of the vehicle independently, should the other party become unavailable or incapacitated. Guess not a lot of folks are doing this, because on a recent new car purchase, it took three trys with the DMV to get it correct - their screwup every time!

Well I've taken the plunge.

Toyota 20v Rsi ITB's. 43mm. What's nice about these is that the TPS sensor is mounted on one of the ITB's and the fact that they split into 4 separate units, plus they lock into each other so ther will be no play on the shafts. Next is to get a set of manifolds made up with injector positions.

http://i100.photobucket.com/albums/m29/flatfourfan/Engine%20Build%20Pics/DSC00074.jpg

http://i100.photobucket.com/albums/m29/flatfourfan/Engine%20Build%20Pics/DSC05093.jpg

and finally split

http://i100.photobucket.com/albums/m29/flatfourfan/Engine%20Build%20Pics/DSC05097.jpg

The motor is currently in the strip down stage and I'm awaiting the crank, cam, heads as well as my EFI to arrive.

Gary
Any update on this?