Injector enlarging

[Skin]

Has anyone ever done this? Ive seen on the net various people discussing it. I think it involves boring out the injector, thus making it flow more.

I ask as i would like to enlarge the secondaries in my rx7 to something more than 850cc. And before you say just buy some bigger injectors, its not as easy as that, you have to replace the whole fuel rail with a custom one - not cheap

[flygt4]

stop being a tight bastard and do it properly the first time

[Lith]

stop being a tight bastard and do it properly the first time

^^ What he said.

Or give Speedworks in Palmy a call, I believe they do the injector enlarging thing with reasonable results.

[atmosports]

To be honest most of the professional crowds that enlarge/hiflow injectors only give them a small increase maybe 50cc/min maximum. The only ones I've found to be honest in what they flow, be match & have the same flow patterns are some custom ones from RC engineering in the states & I know what they are worth but there was no other easy option in that application. I'd stay clear unless you got some really good machinery as I know I've had a go with mixed results & I've got access to some really good machines/tooling & how how to use it.

There are big secondary options available to suit your car without changing the rail but I can tell you now, last time I priced them a set of injectors & rail kit, plus fitting this setup costs less than the injectors to fit the stock setup & the other good thing with changing the rails was if the 1200cc/min injectors where big enough we could go to 1600/2000cc/min ones for about $200 an injector, where as if we didn't change the rail & 1200's weren't big enough then it would've been the same $$$ again to get the 1570cc ones that were the biggest I could find that'd fit.