I sent off a set of 1300cc injectors I purchased off the forum, they were done by RC Engineering.

I sent them off to witchhunter.com to have them cleaned and flow tested, and it looks as though at 100% duty cycle one flows 1520ccs and the other flows 1750ccs


That's a huge margin of difference / error from the 1300cc they are supposed to flow.

Anywho, that was at 100% duty cycle. The guy from witchhunter told me that at 50-65% duty cycle they were a lot closer in flow, with only a 5% differenece (what I've been told is 4% difference is even acceptable from the factory)

So based on this, i'm assuming at 85% duty cycle (what I plan to run these at max) will be somewhere in the range of 8-10% difference.

How do you suppose this will effect my tuning? Will I have rich spots / pockets?


Lastly, since these injectors are flowing 1500cc even at 25% cruising duty cycle, I'm assuming I should atleast enter these in as 1500cc injectors in the PowerFC, and I was told I could leave the lag time what I was going to put it at (.2)

Anyone have an insight or ideas with this?? I knew I should have stayed away from modified injectors, but it just seemed so much easier to bolt in rather than replace the whole rail and get a datalogit for 1600cc injectors which are really overkill for my setup.

Thanks

 

From previous post, the best option is the 850s that were enlarged to 1200s. The 1300s have had high failure rates.

Should have sent them to RC . Until they are matched, I would not use them.