Stock fuel rail limit

[MidWest240Collector]

Anyone know what the limit of the stock fuel rail is. I'm trying to figure the cost of my fuel system and if I can use the stock fuel rail for 400+whp then that will save me some money. Thanks.

[:: orion ::]

Yes...guys have used ~740cc injectors for years on SR motors making +450rwhp...with zero issue.

Our KA rails are quite similar...and will flow just as much.

- Brian

[dft24ds]

So I know you can use 370cc's on our fuel rail with no adjustments but what about 550's and 740's? Direct replacement or do you have to do something with o-rings, wiringor some other crap?

[Craving4Boost]

yes the 550cc's are direct replacements if they are sidefeeds. I have never seen 740cc's sidefeeds, so if you go that route most likely your gonna have to change to a top feed fuel rail

[lrb_2000]

http://www.optionimports.com/ni74sifefuin.html

[Craving4Boost]

hmm...alright im proven wrong. but the price for top feed injectors are incredibly cheaper

[lrb_2000]

indeed they are... I was just sayin they're out there...

I'll have to get a top feed rail.. and some 800cc's..

[hannibal]

I believe there are 850cc side feeds (Blitz?), but for the cost, a new top feed rail and injectors would probably be cheaper.

No need to upgrade stock side feed rail. From what Ive heard, I'd rather upgrade fuel lines and such.

[jmwenick]

Just Go with Deatschwerks injectors, sidefeed and a great price, also you can get pretty much any size you want. I will be getting these in a couple of months. http://www.deatschwerks.com