thafox

http://cgi.ebay.com/ebaymotors/Mazda...QQcmdZViewItem
saw this item on ebay 2day, does anybody know bout it? like how it's actually set up or where it's from? etc

rotary emotions

it's not EFI, but mechanical injection (high pressure pump a lot like an old diesel system). Many old-style race cars used a simular setup, but I can't really say from what exact engine this comes.

82transam

iTrader: (18)

yea hard to say what it came from. Mercedes used to use nothing but mechanical fuel injection, we had a 91 300E in the shop at work the other day that wasn't running right, what a PITA to tune they are, I wouldn't waste my time with that ****...

no_name

That is so cool. I would totaly do that, if I had the money. Mech Fuel injection is aswsome if you get it right. Airplane engines from teh second World War had mech fuel injection. It works as good if not better then EFI, but has no electrics... Some of of the late war engines were V 12's upwards of 2 000 hp.

If you are up for a challenge go for it.

aussiesmg

iTrader: (1)

Volvos used Bosch mechanical fuel injection for many years with great results, early Aussie Fords used the same system with no problems either.....

no_name

I totaly wish I was not poor, I would toataly do it.... maybe I can talk my dad into it

xrotaryguy

The mech fuel injection works great! Its better than a weber for sure and easier to tune than electronic. The tend to get boogered up if theres varnish in the fuel line or any little bit of dirt in those little brass lines.

Looks like neat stuff there but I think its kinda just bits and pieces.

1sgen

iTrader: (1)

yeh right
talking about 60 year old technology and you have the nerve to say it will work better than efi.
it might work ok but its no where near as good or refined as the efi.
the only racers that use this setup are drag racers and that is because they dont care about anything else but wide open throttle

Hyper4mance2k

iTrader: (40)

Why don't you kick your sef in the *****? Mulhullins uses this system and they're hardly drag racing...

no_name

Dude aerobatics planes still use MFI and most perormfance aircraft still use MFI, why? Because it works better. They cannot aford to have an engine cut out bunting negative 10G. MFI kicks EFI's but, because it works jsut as well but has no electronics to complicate it.

I am trying to convince my dad to buy it for me hehhehehe...

Max7

Show me 1 sportscar made today the uses MFI since its so superior............
There is no way MFI can be better than EFI under all conditions.

On that note, Mulhullins has the baddest FB anywhere, but then we already knew that.
try driving that car as a DD with the MFI and you will see where its not as good as EFI......

Tranquil

iTrader: (1)

Reasons for MFI - safety in aeronautics

Reasons for EFI - precision

Reasons for carb - simplicity

quit ya'll bitchin, I'mma win that auction.

Stevan

iTrader: (17)

FWIW, from How to Modify your Mazda Rx-7.

no_name

I totaly want this. Does any one know if it comes with pump too?

Boswoj

Back in the IMSA and endurance racing days flat slide carbs and Kugelfischer mechanical injection pumps were the way to go. The pump is very similar to the one found on BMW 2002tii's. There are still a couple of magicians on here on the west coast who rebuild and tune those pumps, and do an awesome job. I believe that one of them actually bought up all of the factory tools and spares when Bosch stopped manufacturing them. Flat slide carbs are cool because at wide open throttle absolutely nothing is hanging out in the ventuir stream like the shaft and butterfly in a conventional carb. Makes the best use of a rule limited venturi size! Mechanical fuel injection is DEAD reliable, just not as site adjustable as EFI. Kugelfischer uses a metal cone to define fuel mapping that can be tuned pretty accurately at the shop, but not at the track unless you just want to switch the whole pump. The only problem with flat slide carbs is that in th old days, since they have vacuum pulling at the back face and need to slide perpendicularly to that force, they sometimes wanted to bind and were difficult to open and close. Cool set up though, definitely old school racing.

aussiesmg

iTrader: (1)

suits an old school car...........what is missing from this set up.

no_name

Cool... drool drips down cheak. The best part is you can drive your car upside down if it is true mechanical fuel injection with out cutting out... no floats.

Max7

How do you get fuel out of the gas tank when upside down?

Slammed_GSL

iTrader: (14)

I have been looking for one of these setups for 2 years.....bidding will be high on this.
Last one I saw was over $800 but in better condition.
Might have to sell a set of wheels.
Price you pay for the toys you want.

no_name

A fuel pump???

Max7

pumps fuel, kinda neat................

Hyper4mance2k

iTrader: (40)

Hey Lloyd havent seen you on here in a while! Hope you get it that would be siiiiiick!

rotary emotions

Jaguar E-types lightwheight (very rare alu-bodied race cars) used sliding throttles too. I'm just not so sure about such a setup in a road car. There's probable a reason we all have butterfly throttles...
Other then that, mechanical injection is something very common on European cars of that age. Mercedes-Benz used it for ages, as did Porsche, VW,... It works good if setup right, but it takes a good mechanic to get the job done. EFI is simply easier to control for factories as it never needs adjustments any more. They can map the ECU the way they feel it needs to be and it will last as long as the ECU lasts. For my daily driver (mazda 626) that means 11 years and 152.000km by now. An MFI would have been adjusted many times by now.

I do agree it really suits old school cars though, and I'd be really intrested in fiddling with such a setup if I had money enough

SparkienSuggah

is it just me, or isnt this setup missing the lower intake manifold? and isnt the lower intake designed for a Perhipheral ported motor? (referencing the older pics posted earlier)

anyone who buys this has got a great fabrication job on their hands.

Kim

The manifold is MFR for peripheral port, correct.