IMPUT WANTED, Engine build

[95Grand-Am]

Two year ago I built a 3400 with a small port intake with stock 17# injectors wich ran good. Last year I built a 3400 with a large port intake that was gasket matched and the heads were bowl blended and gasket matched. It used 19# injectors and thin headgaskets ment for iron head 3.4L. This last engine ran great, I ran both engine on OBD 1.5 without a problem. What I want to build this year is a 3400 with 3500 heads, using 3.4L iron head pistons and 19# injectors. I might deck the block to get a zero deck and use the gaskets ment for iron head 3.4L. Do you think this is to much for the OBD1.5? I'm not going to change to OBD 2. If there is no way this will run right than I will stay with what I have. Premium fuel will be used, and if needed I will get a newer feul rail to increase feul pressure. I race this car only, Idile quality, feul mileage, low rpm power don't matter to me. Only full throttle 4000 -5700 rpms matter to me. Should I build it or will it be a waste of time and not be a good as the 3400 large port that I'm using now.

[SappySE107]

Waste of time cause you can't run the cam needed for that setup without the ability to tune. 19# injectors wouldn't support any race engine anyway. Roughly 200 whp is all they are good for and what you are talking about is easily over that.

[95Grand-Am]

What would you recomend? Should I stay with what I have? Should I put 3500 Heads and lower intake on without the 3.4L pistons? What about putting the 3500 valves into the 3400 heads? How big of a cam would I need to be able to run the 3.4L pistons?

[IsaacHayes]

Grab a megasquirt, and run the engine with that. Cheap and easy to do. Just double up on sensors. CTS, MAP, are a few. That way the stock ECM can still shift the trans. Yeah it needs MAP for load, and CTS input for the trans. 3500 valves are lighter thats all.

Basically you are at or exceeding the limit of the stock ECM to compensate as is. You can gain more power just by tuning what you have now. The setup you want now will REQUIRE a tune to run well safely without going lean and knocking, or running too rich and bogging.