peejay

Ok, I have an idea for y'all and it's pretty crazy but there's a method to my madness.

I want to run a 13BT engine, half-bridge ported, with the stock ECU setup, but WITHOUT the turbo.

Method to the madness: I'm slowly going to be building up my FC. Right now it's a dead-engine 6-port automatic. Eventually it will have a half-bridge, T04, standalone computer setup. I need to get the car on the road as soon as funds allow (probably will be on the road next spring). I'm already acquiring everything I need to put in a T2 drivetrain, including wiring and ECU and everything else. I can't afford to build the 6-port engine to drive it, and then build the 13BT engine. Likewise, I don't want to do up the 13BT engine twice. I'm thinking, the 13BT ECU can probably support the modest N/A BP power I'm looking for (about 200rwhp) and it will get me going while I get the turbo and the standalone computer and everything else I'll need - and then I just swap it in, get the ECU tuned, and I'm done....

Or is this just a stupid idea? The problem is, I'm going to be losing the storage for the car next year and I either have to get it running, or get rid of it, and getting rid of it is not really an option.

Obviously the low compression (8.5:1?) won't be ideal, but OTOH bridge ports don't need as much timing, so maybe with the low compression and stock-port timing settings in the ECU it'll balance out. My main concern (besides the manifold possibly not flowing enough) is that the computer will freak out when it sees all that airflow through the engine with no boost pressure.

I'm already dedicated to the idea of a bridge port turbo street/track car, I just need to strike while the iron is hot.

Max7

I'd say find a cheap carb to get it running, trying to get the ECU to run anything above a street port is not a good idea.
also the fuel maps would be wrong, since I'd think it would be looking for boost, and there would be none.
find a cheap used carb, that should get you moving.

you going to be building the B-port in Cbus? might have to have a
"come check it out" day, so we can see the master at work

peejay

Heh heh heh heh.....


As for the fuel maps, my line of thinking is: 2nd-gens go open-loop over something like 3800 anyway, and rely on internal maps to provide the correct amount of fuel and ignore the O2 sensor. Basically the maps are based off of the air-flow meter output, with trim adjustments based on coolant temp, air temp, etc. So it should (maybe possibly hopefully) provide the correct air/fuel ratio (or at least Good 'Nuff) because the ECU *will* know how much air is going in, and provide the fuel based on that. This isn't scary speed-density setups like FDs have where if you look at it wrong the fueling gets messed up.

This is somewhat common knowledge in the domestic world - the Mustangs to modify are the '88-89 and up models that use mass-air to determine fueling. Up to a point (generally the RPM and injector limits) you can put in bigger cams, do head work, open exhausts, etc. and the computer won't freak out. The older models that use speed-density, however, WILL freak out. In fact, Ford Motorsport sells a kit to convert the older models to mass-air so that they can be modded easier.