im looking to go fuel injected and i really like the looks of this throttle body made by fast. it bolts on to my racing beat intake manifold for my holley and i kinda looks like the next logical step. i got a few questions though...

Could i use any standalone ecu with this? im looking at haltech or tec3r.
Are 85 lbs injectors a good size?
I already have a wideband, is there any other sensors i need that are not on the throttle body already?

has any one used this? it looks a lot like the ej throttle body but a little simpler and complete.

link to site : http://www.compperformancegroupstore...Code=4150Style

 

details (like sensors, ignition, etc.) aside, you should be able to use the EMS of your choice.

for an N/A application they may be too big, but since they seem to come as a part of the kit, try them. you can always work that out later if it's an issue.

you need to get the schematic from the EMS you choose, but it seems to come with most of what i imagine you'd need - at least for a basic speed density system. it certainly comes with more than my TWM throttle body did.

 

That's a bit pricey but MAN you do get a lot. (To be fair, a good Holley-frame carb costs as much or more)

Only problem I see with it is that the Holley-frame throttle bodies tend to have HUGE throttle plates, sometimes they are squared off in the middle or simply two very long blades, since the intended applications are generally high HP engines (600hp+) on single-plane intakes. You *may* have issues with trying to run it on a RB intake.

Coincidentally enough, I just bought an RB intake with a mind to converting a carburetor to an air-only throttle. The throttle-side of the ports are only 42mm in diameter, so I don't think I'll be able to use a gutted 750 like I'd planned without some porting.

 

I don't mind cutting away some of the manifold so they will clear. What is the best ecu that will controlling this? And do I need to run new fuel lines when I change my pump?

 

"Best" ECU is relative I guess. You will have to make your own harness and you will have to tap off the dizzy signal and run the injectors batch fired. Some of these style "complete EFI" throttlebody injection conversion kits come with their own software and harness.

 

they do sell a "self tunning" ecu but its made for v8's (http://www.compperformancegroupstore...stemEZIEFIKits)

i figure for the extra $1000 i would be better off with a haltech or other standalone.

 

I've seen a similar setup work very nicely on a big block ford drag car, open wheel drag car.

 

Just a side note on the Holley manifold deal. We used a 650 Double pumper with great results on a13B off road car. It was really good until we started porting the thing, then it got sensitive as the port lengths are staggered in the original manifold. Optimally? you'd like the shorter lengths on the secondary side. We tried bridge secondaries; as the Holley was staged, and it did really well. Full briidge, and we had to lengthen the primary air horn for controlling the fuel standoff over the primary throttle bores. After that, it ran even better. Are the throttle plates staged like a Holley?

GD

 

i was planning to half bridge the secondaries on the 6 port... unless i can find 4 port irons or gsl-se housings. the manifold looks like it is staged to open separately and i remember reading somewhere that it was but i am still trying to find a solid answer on that.