I just wanted to run an idea by you all. I understand that the fith injector setup with the Alpine turbo kit is not the most desirable setup to have what with the chance to starve certain cylinders of fuel and all.
Back when I had my '67 olds 442 my friend and I thought up putting a high strength screen material between the carb and intake manifold. Our theory was that this screen would help atomize the fuel better promoting better atomization. My question is has anyone tried this on a fuel injected setup? I was thinking of putting the 'screen' in between the throttle body and Intake manifold down stream of the fith injector. I don't think it would hurt anything as long as the material holds up to the forced air and fuel going through it. What do you all think? Would it work? Do you think it would matter at all or does it depend on what type of spray pattern the 50lb/hr injector has?

[ March 20, 2003, 09:24 AM: Message edited by: dmdicks1 ]

 

Its not the atomization of the fuel thats the biggest problem, its the fact that our intake manifolds were never designed to flow air and fuel.

 

the modern fuel injector usually has not problems atomizing the fuel. Expecially when placed so far upstream of the intake port.

As Skierd pointed out. The problem lies in the design of the intake manifold. The intake manifold was never designed to flow fuel and air. It was designed to flow air only.

 

Thanks Skeird, Random,

It was just an idea. I wasn't sure how well the fuel would be atomized after it leaves the injector. My main experience is with carbs... sad.gif
I was also taking a look at the 2003 manifold and the 2001 manifold and noticed that the 2003 design has a bigger surge tank and smaller runners than the 2001 IM. Would this help or hinder the whole air/fuel and starving cylinder problem? Someday I will just go with 4 larger injectors but the Alpine piggyback ECU is going to be designed to use the fith injector.

 

unless you run an individual wide band o2 sensor on each exhaust port, you won't know if one cylinder is more starved for air/fuel than the other.

In general it is cylinder #2 and #3 (the 2 middle cylinders) that seem to run into detonation problems with nitrous setups.

With the Alpine turbo setup, I would get detonation across all 4 cylinders equally. However, since the re-tune, this has not been a problem. I've only logged about 100 miles since the retune, I should get my car back from Shark Racing mid/late next week, and then I can start logging more mileage on the car, and we can see how much of an improvment the last retune is.

 

Random,

What are you having done at Shark Racing? I'm jealous that you have all the cool shops within driving distance. Hey at least in Denver we have 27 inches of snow on the ground right now!!!

 

Nothing actually. They are borrowing my car so they can create a new body kit.

 

better be a wide body kit smile.gif

 

Naw, they are working on their gen1 cuda Kit.