Use of injector stacks on top of a blower:

RE: Use of injector stacks on top of a blower:

1) Has anyone ever put injectors stacks on top of a blower in lieu of a bugcatcher or other type of scoop?

It would seem unnecessary to do this, but i think i have seen a picture or 2 of this being done. Which why i'm intrigued by this concept.

 

dre,
Isn't that a 4 port hilborn with stacks instead of a scoop?

 

I was trying to figure out the question of what was being asked and the only thing I could come up with is that--- Hilborn with calliopy stacks and not if anybody has mounted a Chevy injector manifold on top of a blower

 

OK I have a hilborn setup for a chevy, now I got to get a blower and do that. See what you done.

I was thinking that he was talking about a hilborn or alagon or enderle stack injection (like you would bolt onto an SBC (or Hemi?)) but just couldn't for the life of me come up with an answer. You could throw some stacks some of enderle barn doors but that would look so '70s.

 

Yes, i think that's what i'm asking----the 8 stacks on top of a blower, not the manifold, just the 8 tubes. i think i've seen it but can't remember where.

It would seem counterintuitive, but maybe there is/was a practical technical reason for doing so?

 

Not my thing but you asked for it! http://www.eddieschopshop.com/efi-conversions/

 

Some guys may have tried stacks or tubes on an injector like a Hilborn 4 port rather than the scoop.

 

Hmm? I would think that even with all eight throttle plates completely "closed", there would be too much leakage past the*****erflies (inlet area). The idle would be way too high.

 

You can start with a RONS/Crower 8 port injector, unbolt the scoop and make some tube adapters

 

Although it may look cool, the calliope stacks purpose is to cause a ram effect in a similar manner as a tuned exhaust. It uses the tube length and the pulsating intake cycle to give more H.P. at a certain RPM.
A Blown engine pulls air continuously with no pulsations so there would not be any real performance benefit to using tuned stacks on a blower.

 

That's what i kind of thought.

i guess the pictures of the applications i saw were for show.

 

Have seen 8 stack injecter on a blower in a mag i have some were, they machined the intake and adapted to the blower but in later pics in the same mag of it had carbs on so must not work well or not at all.

 

When Nick Cirino added the blower to the Olds in his Durfee Auto roadster in 1960, he made up a pyramid adapter on top of the blower, and mounted the Hilborn port injectors previously used on the unblown motor. The "basket of snakes" ram tubes gave the car an interesting look.

 

I found this view?

 

Wasn't that just a cut Tall 4 port injection cut from the*****erflies up?

 

You mean like this:

 

God said there is nothing new under the sun---i am just amazed that if there were ...somebody on the hamb could post a picture of it !!!

 

Have u checked out inglese? They even are working on a 4 stack due to be out shortly.

 

Yes and maybe:

i noticed that in this picture the fuel is being injected above/before the blower. Also 8 times in 8 tubes.

i was generally asking about why(any technical benefit?) would someone put 8 stacks on top of a blower while i subconsciously thought the fuel would be injected below/after the blower.

But since you brought it up, would injecting the fuel before the blower and in this manor (8 times in 8 tubes) change anything? Also, i think in most cases when a roots blower is used, the fuel is injected after the blower. (???)

 

Some fuel has to go thru the blower for lube,cooling and sealing the rotors

 

That is 70s!

 

That Yellow T Bucket is a fairly new set up as that is ELECTRONIC FUEL INJECTION on that set up.
There is absolutely NO benefit to running a port style injector on top of a blower with Ram Tubes. so the pictures you've seen are either very early experimentation (like the one Dean showed) that later proved not to help, or silly street cars that subscribe to "Let's add more*****" theory of car building.

 

Hot DAMN! Another Friday night shock rod thread!

 

perhaps i'm missing something here, but don't Roots-type superchargers serve in hundreds of different industrial applications where they are simply moving just air; not an air/fuel charge?

 

clearances change depending on the use, we run 8 injectors on top of the blower restricted by rules, they are also positioned to cool the blower if allowed we would also run 8 in the manifold.

 

jeff/21, thanks for the clarification.

as for the theme of the thread, unless it's one of the "classic" port injectors that mount to GMC superchargers, the idea is, mmm, let's say, a little disco. sort of '70's ISCA-show-car-mentality

 

The yellow "T bucket" belongs to one of my old high school buddies in Whittier.

The injector is a Dave Benjamin billet creation, with BDS electronic fuel injectors.

He came by my shop when he wanted to build it, and it took me a while to figure out what he wanted, and that's what he wanted all along.

 

Just to make clear, fuel must always pass through a roots blower in order to lube(thought that was taken care of with oil?), cool (will get to that in a sec) and seal (?) the rotors?

a) what if it's only used for dragging?

b) If running on the street?

i want to set it up so that fuel is injected below/after the blower.

 

If there was a benefit to doing this don't you think Hilborn or any other injector manufacturer would have done it?