Text is hard to interpret sometimes , as there are two meanings to ... if you built your car , and " If " (as-if , attaching skepticism ) . I don't comment much , cause the general theme , in these type of forums , is safety first , by the book . Which is fine , but hinders exploration , and...
I'm done with the OP issue , just touching on the twin engine comment . Yes , I built my car , from front to back , with no outside assistance . Even did it without a lift , which was interesting . This is my second twin engine build . I'm a Master Certified mechanic . Which alone , doesn't mean...
I'll end on this ... The OP asked , could he , not should he . So , could he run 550's without running to rich . Yes . Should he run 550's ... that depends . He may have engine management on the way , so throwing the injectors in , a bit early , is do-able . Being , that they aren't too much...
Pauly ... we're not staring at fuel trims , to determine , how much the ecu is yanking fuel . But , 550's aren't big enough , to cause bad drive-ability problems , but are big enough , to hurt mpg's , and make acceleration slightly sluggish , in spots . This can be countered , a few different...
He probably wants to install his upgraded parts , as he gets them . Rather then wait , until it make sense to . You can install your 550cc's . Your car will run , idle , and drive fine . But ... it will be rich in spots . More so , where the ecu is in open loop ( warm up , and wot ) . In between...