xa007xa

440, 550, or 700? My goal is 250whp but since stock is 185cc i'm thinking that i would run into scaling problems with the 700cc injectors since im using a piggy back setup.

JSosa

your engine is built, coreect? If so, then at 15 lbs. on a GT25R 400cc's should be enough, Because currenlty im running stock internals at 7lbs with that turbo on 310cc injectors,

365Motorwerks

I went with the 550cc and while at the boost levels we are all at they may sound like overkill there are a couple of reasons. You can scale them back to whatever you need, they are plug and play & they cost less than going with a new set of OE tC injectors!

BTW I have them in 550cc and 700cc.
http://www.365motorwerks.com/fuelcomponents.aspx

xa007xa

yes, I have a built motor. my goal is to run around 20psi. how are the 700cc injectors? do you have any issues at idle? my stock tune is crappy from what my tuner said and he had a hard time adding enough fuel with the 310's at certain points in the fuel maps. he got around a few of these issues using the air flow adjustment map, but I'd like my tune to just be fuel and ignition maps. so because of these issues, I want to go with 700cc but he said that I shouldn't because of scaling issues going so much larger than stock.

365Motorwerks

I have no personal experience with the 700's but the 550's are working great and run around on a daily basis on a few 1NZ's I know of with no idle issues. I'm not a tuner nor do I play on on the web ;) with that being said it might be that the amount he would have to scale back the 700's might not be possible on the Ultimate as it will be more than a 50% reduction. I would say if your happy with the tuner go with what he is asking for as it will be easier for him to do his job.

xa007xa

wanna sell your 700cc injectors?

365Motorwerks

That's what I do
They would be a new set I don't have any opened/test ones.

http://www.365motorwerks.com/fuelcomponents.aspx

xa007xa

just got off the phone with greddy and they said that ultimate can only control primary injectors 150% over stock. so that means I gotta go with 440cc.

headlessmunky

iTrader: (2)

440's

blown_xa

for 250whp 440's will be around their limit. Your have to consisder when you plan to run 20psi of boost, 440's are not 440's anymore. If your fuel pressure is 40psi and you are tuning for 20psi of boost then your cc's would not be 440. I would sugest getting 550's, we sell drop in 550's on our site which dont require a clip change. They are for the tC. Also I was informed around 15psi is around when you should upgrade the fuel pump, I havent gotten to that point yet but I would consider it.

Are you changing your turbo kit? I am fairly certain that the Greddy turbo will not flow past 200whp, maybe less.

For that whp I would consider a GT28 turbo, somthing around that size.