48 IDA Injection

[Zach Gomulka]

http://www.eightstack.com

[steve_pugh]

These look super cool.      Fuel injection but keeping the old school IDA look. 
Obviously they are selling them as a kit for V8s with manifolds, but I wonder how much they would be to just replace your existing IDAs?

[hotrodsurplus]

I saw these at SEMA and even talked to the rep at the booth. I don't think they were submitted to us for new-product photography because I don't recall them coming through (even if they didn't come through my cove the guys I shoot with know to tell me about stuff like that). They might have come through in prior years but my mind is mush.

1. They're beautiful--quality casting and supreme machine work.

2. They're INSANELY expensive--like pushing a grand per TB. Actually maybe more than a grand per TB.

3. A consequence of hiding everything puts the injectors ABOVE the throttle blades. That's great for a Ducati or an F1 engine that operates mostly at half-to-full throttle but not for a street car that has to idle properly and run well at light throttle. Running the injectors that way simply destroys the atomization when the blades are closed (idle) or barely open.

At first the rep dismissed the issues as negligible which I couldn't swallow. But he got real uptight when I started asking specific questions and pressing for answers. He said that with cam timing that develops a very low manifold pressure (read short duration and/or LSA) it isn't a problem but aggressive cam timing will make them perform poorly. That the company is developing a TB that mounts the injectors below the throttle blades says it all to me.


 

[NoBars]

Usually a bike will run 2 injectors, one down in the port, and a "showerhead" for WOT. This gives the fuel time to atomize at high RPMs.

Those look real nice though.

[Lids]

wasn't there another set of Fuel injection IDA's that came out about 5 years ago?

[hotrodsurplus]

wasn't there another set of Fuel injection IDA's that came out about 5 years ago?

They've come out in various forms for 20 or so years.

www.foxinjection.com
http://www.redlineweber.com/html/throttle_bodies/Throttle%20bodies_ida.htm
Borla exhaust bought TWM and made a few changes. That was a few years back. http://www.borlainduction.com/other-throttle-body-kits.html
http://srengineering.web.fc2.com/ida_throttle_body.htm
I think these debuted last year or the year before at SEMA. http://kms.vankronenburg.nl/wp-content/uploads/2012/03/KMS-Throttle-bodies-catalogus-2011.pdf
http://atpowerthrottles.com/catalog/throttle-bodies-assembly-price-application-p-181.html
http://www.efihardware.com/products/15/throttle-body-race-120-Series-IDA-sizes-45-55mm

Jim Inglese introduced a somewhat faithful IDA analog at SEMA in '08 or '09. http://www.classicfuelinjection.com/WhatsNew/Default.asp?offset=25#

and so on and so on...

It's going to be impossible to create a throttle body exactly in the image of an IDA because of injector placement. The injector simply needs to introduce fuel below the butterfly if it's to deliver atomized fuel (the only kind of fuel that readily burns) to the cylinder. And that's impossible within the confines of an IDA-style throttle body.

If you want the look of IDAs just gut a pair of real IDAs, mount a TPS to the end of one shaft, and weld injector bungs in the manifold itself. Every method has its flaws but short of running GSX-R throttle bodies that's about the most cost effective.

[Lids]

here we go  http://cal-look.no/lounge/index.php/topic,2887.0.html

http://www.kitcarmag.com/techarticles/0809kc_dynatek_racings_classic_fuel_injection/