Crower style stack injection MFI

34271 Views 190 Replies 27 Participants Last post by digitaloverdrivesyst, 7 d ago

hotrod56cars

Discussion Starter · May 8, 2008 (Edited)

5

I bought a Crower MFI set up that was listed as being complete, minus hoses, set up for alcohol, completely rebuilt by Kinsler (except the Crower mechanical fuel pump). It also came with a couple of books/catalogs from Kinsler.

Problem's. One problem is that in the books there isn't a plumbing schematic that shows all of the parts that I have. I don't even know if I need all of the parts that I have. A couple of the parts I don't know what they are. I saw a flathead Ford powered altered at the Antique Drags the other day and that flathead didn't have near the components in his Hilborn MFI that I have, so why do I need them? I don't know what fuel he was running. Another problem, typical for me, is I can't make up my mind on what fuel to run. Avgas, E85, 110, and alcohol are all under consideration. Oh yea, 13:1 468 BBC, tunnel jet drive.

I've got countless numbers of people telling me that I am going to have nothing but problems with this set up and that it will never run correctly. ALL of the people that have said that to me have never owned a MFI.

I've gotten a few people to PM/call me and tell me that once it's dialed in I will be very happy with it. ALL of the people that have said that to me have owned MFI stack systems.

Anywho, here's some pics. The first pic is of my MFI, just so we're on the same page. Second pic is a Kinsler drawing of a old method of plumbing a MFI. Third pic is of a "new" preferred method of plumbing a MFI. Fourth pic is of a plumbing schematic for a Vapor Sepearator Tank that I have. Last pic is plumbing schematic for a Jet Selector Switch that I have.

More pics and questions to follow. Hopefully the pics work and aren't too big.

See less See more

141 - 160 of 191 Posts

hotrod56cars

Discussion Starter · #141 · May 17, 2008 (Edited)

Surge Tank

Forget this one too, it's wrong.

See less See more

hotrod56cars

Discussion Starter · #142 · May 17, 2008

My existing parts, with the Vapor Separator Tank.

See less See more

hotrod56cars

Discussion Starter · #143 · May 17, 2008

What are the gold colored parts in this pic?

See less See more

Morg

· #144 · May 18, 2008

hotrod56cars said:
Again this is using the parts that I already have. I have added a secondary by-pass valve/jet can to it which I think gives me adjustability in the mid-range (2500 - 6500 RPM I think).

This is real close to what I ran on my Crowers. The only difference was I ran the main bypass off of the pump.

So simple you keep telling yourself, it can't be this simple.

See less See more

hotrod56cars

Discussion Starter · #145 · May 18, 2008

Morg said:
This is real close to what I ran on my Crowers. The only difference was I ran the main bypass off of the pump.

So simple you keep telling yourself, it can't be this simple.

Like this?

See less See more

Morg

· #146 · May 18, 2008

hotrod56cars said:
Like this?

That would be it.

I did have a high speed plumbed in, but had it blocked off. I never played with it.

With Fiat's help it was real simple.

I started running alky for the tuning window. (Huge). Anywhere close & she will work.

ol guy

· #147 · May 19, 2008

Morg said:
That would be it.

I did have a high speed plumbed in, but had it blocked off. I never played with it.

With Fiat's help it was real simple.

I started running alky for the tuning window. (Huge). Anywhere close & she will work.

Hey Hot Rod, Good luck and hope for the best results for you M

Fiat48

· #148 · May 19, 2008

Canuc said:
injection scores big in the eye appeal for sure either the stacks or the bugcatcher but what is the gain in power in a na set-up ?

Testing I did comparing a tunnel ram and 2 dominators verses a set of upright injectors on a 500 inch PGF was.....speed was the same...ET was better with the uprights. I attributed this to the throttle response the injectors had. I also felt I had more control in tuning with the injector than I did carbs.

Morg did back to back tests of single 4 barrel on his 427 and then going to the injectors...but...Morgs injectors were alcohol so that was cheating a little if you believe alcohol makes more power than gas.
I do know Morg never went back. To gas or a carb after that.

Fiat48

· #149 · May 19, 2008

On Morg's deal...he mounted the pump low and used a belt drive. This keeps the pump wet with the fuel tank he has and aids in starting. He would prime it with a bottle once in the morning....and it would turn key start the rest of the day. We never did get to tuning a high speed as it ran very well just single main jet.
There is some video here of us messing around at Lahonatan (high altitude lake).
http://s152.photobucket.com/albums/s193/Edmontrno/?action=view&current=MorgLahontan2006.flv

Canuc

· #150 · May 19, 2008

thanks Fiat48, my question wasn't very specific but the gas tunnel ram carb set-up was the comparison i was looking for .

hotrod56cars

Discussion Starter · #151 · May 19, 2008

ol guy said:
Hey Hot Rod, Good luck and hope for the best results for you M

Me too! and Thank You!

hotrod56cars

Discussion Starter · #152 · May 19, 2008

Fiat48 said:
On Morg's deal...he mounted the pump low and used a belt drive. This keeps the pump wet with the fuel tank he has and aids in starting. He would prime it with a bottle once in the morning....and it would turn key start the rest of the day. We never did get to tuning a high speed as it ran very well just single main jet.
There is some video here of us messing around at Lahonatan (high altitude lake).
http://s152.photobucket.com/albums/s193/Edmontrno/?action=view&current=MorgLahontan2006.flv

That is exactly the strategy I'm running with.

That is one bad azzed video, is that a blown MFI or???

hotrod56cars

Discussion Starter · #153 · May 20, 2008 (Edited)

ttt

I tried to photoshop a "see through" pic of my earliest plumbing idea's. (Edit:This isn't going to work.)

See less See more

hotrod56cars

Discussion Starter · #154 · May 20, 2008

I'm just wondering if my re-sized pic will come out bigger or not.

See less See more

Fiat48

· #155 · May 20, 2008

See less See more

hotrod56cars

Discussion Starter · #156 · May 20, 2008

I can't figure out how to empty the 2 saddle tanks into the T tank without over filling the T tank or emptying the T tank before all the fuel is out of the saddle tanks. I need some sort of float operated fill system/switch operated fill system for the T tank so I can get fuel from the saddle tanks into the T tank without overfilling the T tank... with the photoshop deal I drew out the T tank is going to spew fuel out the vents. The top of the T tank is higher than the saddle tanks and the bottom of the T tank is lower than the saddle tanks.

?

hotrod56cars

Discussion Starter · #157 · May 20, 2008

2

Got it.

I think I got the supply system for the MFI fuel pump figured out for my app.. I can't "see" anything that would screw it up, yet.

The simple drawing shows relative height to each part.

I didn't "paint in" the saddle tank vent valves in that "see through" pic. The valves will be controlled by a cable system similar to old manual choke controls. Same with my barrel valves fuel inlet valve.

See less See more

Moneypit

· #158 · May 21, 2008

Huh?

hotrod56cars said:
I think I got the supply system for the MFI fuel pump figured out for my app.. I can't "see" anything that would screw it up, yet.

The simple drawing shows relative height to each part.

I didn't "paint in" the saddle tank vent valves in that "see through" pic. The valves will be controlled by a cable system similar to old manual choke controls. Same with my barrel valves fuel inlet valve.

Huh?......Do you have a hand throttle??...........The barrel valve is hooked directly to the butterfly shaft..........Emergency fuel shut off is on the "out" side of the pump.......The fuel quits when the mag is killed because the engine stops and the pump runs off the engine.......Choke cables????.......You can, and should run a fuel shut off between the pump and the tank, but don'y use it to restrict flow while running. Either on, or off..........MP

GoFastRacer

· #159 · May 21, 2008

Moneypit said:
The fuel quits when the mag is killed because the engine stops and the pump runs off the engine.

Hey Ray, think about it the fuel stops when the engine stops, when you kill the mag the engine is still turning over and still pumps fuel until it stops, to shut it off clean you have to pull the fuel shutoff first then kill the mag!..

hotrod56cars

Discussion Starter · #160 · May 21, 2008

Moneypit said:
Huh?......Do you have a hand throttle??...........The barrel valve is hooked directly to the butterfly shaft..........Emergency fuel shut off is on the "out" side of the pump.......The fuel quits when the mag is killed because the engine stops and the pump runs off the engine.......Choke cables????.......You can, and should run a fuel shut off between the pump and the tank, but don'y use it to restrict flow while running. Either on, or off..........MP

There is a valve that controls whether or not fuel is going to get to the barrel valve. Un my system it's called a high flow valve. The valve is inline with the MFI's fuel pump outlet to the high flow valve then to the barrel valve. I want to run a cable control up to the seat area that will control the high flow valve that way I can shut off the fuel supply going to the barrel valve frm the seat area. If I kill the engine by cutting off the fuel supply to the engine, instead of killing the spark to shut down the engine, it won't fill my injectors and engine with fuel while it's shutting down. I'm not sure if engine run-on is a problem or not with a high compression MFI engine when the engine is killed by killing the spark.

141 - 160 of 191 Posts