Thread: Hilborn 8 Stack Electronic Fuel Injection

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There are many things that go into an intake system that has individual runners-----cam timing and overlap, header design(runner length), any exhaust leak?, getting all the throttle blades at the exact same setting(this can then vary side to side on the engine as the engine heats up, especially with alum heads)

The Hilborn on the 32 in my gallery(if you haven't looked, please do-there are also more pics of it in some posts) was built by me a few years ago---It has a Fast sequental system on it--

The length of the injector stacks as well as header length were some of the prime factors we dealt with---

I also fabricated an idle air control system that uses filtered air source and tubes going to each injector base--

I located an IAT(inlet air temp ) sensor in the cowl at the rear top of the engine bay

I incresesd the size of the h2o lines from the front of the manifold to a thermostat housing for coolant return to the radiator----

I used an MSD dist with a second trigger in the base for phasing the injector timing

Used a filter,pump,regular,return line fuel system for control of the fuel and everything is isolated from any exhaust heat----


There are dozens of basic mechanics involved in this plus dozens of tuning issues----I don't believe that a learning system will ever work satisfactorly because the system will never be in a correct mode for it to adjust from---

These systems need considerable chassis dyno time to get base lines for different cruise conditions with over lapping areas of acceleration, coast, idle, etc

In looking at the pics of this car-----------heat build up is going to have to be dealt with and corrected along with doing more to adapt what is basicly a very good system for wide open racing to the real world of put in the key , turn on the sterio, set the a/c, and hit the cruise scene-------------