380cc inj good for 400whp
i'm guessing at 50psi static fuel pressure you will be around low 90's% on those injectors at 400whp. it will be very hard to get an accurate measurement though. the piggy back's will not give an accurate readout of duty cycle unless you are pulling the injector signal from an area it can calculate for the correct duty cycle for the way it is set up.
if you know how to manipulate the injectors it can be done. the point of alot of the posts since your original thread is that if you were planning to up the boost from the start it would be alot better to go with the larger injectors. it can be done at the 400 hp level with the 380's , but what happens when you want to reach for more? and you will, hahhaa.
as said earlier, the best way to do it is to give atleast a decent margin for error and go the route of proven mathematics for power output. the descision is up to you really as it will work with the 380's, but from an original build stand point (if you planned to hit this hp level at start) larger injectors would be a clear choice.
if you know how to manipulate the injectors it can be done. the point of alot of the posts since your original thread is that if you were planning to up the boost from the start it would be alot better to go with the larger injectors. it can be done at the 400 hp level with the 380's , but what happens when you want to reach for more? and you will, hahhaa.
as said earlier, the best way to do it is to give atleast a decent margin for error and go the route of proven mathematics for power output. the descision is up to you really as it will work with the 380's, but from an original build stand point (if you planned to hit this hp level at start) larger injectors would be a clear choice.
Originally Posted by MRC Motorsports
I have 650CC's trimmed via the UTEC and my car idles rock steady at 750rpms with a perfect 14.7 A/F ratio..At 530WHP were seeing 80% duty cycle, and would never opt to tune my injectors to 99% duty cycle, thats just insane and asking for problems..My old APS injectors maxed out a 470whp and were well over 94% IDC and impossible to control at that point..We were running 58psi of idle fuel pressure.
also REDHOTZ honestly Get a set of injectors from DW put the order through and be done with. Like my new sig says im going Utec and 650cc on my car if you want to wait and see what my car does thats fine. gonna go for the max on TN kit and see what stage one turbo does then swap it out
Originally Posted by nissansource
Are you running a return kit at that level
at 400whp with the TN 380's, you will be near 100 duty cycle, at the fuel pressure the TN kit usually produces. Remember that duty cyle is inversly proportional to fuel pressure. So all thing being equal, higher fuel pressure will result in a lower duty cycle across the board...when the car is tune to 400whp.
This is the reason the APS injectors can provide nearly 450-500whp worth of fuel. They are running them at 58psi, vs. the industry standard of 42psi.
If you are trying to reduce costs, you might consider keeping the TN injectors, but running a return fuel system, and increasing your differential fuel pressure to about 60psi.
This is the reason the APS injectors can provide nearly 450-500whp worth of fuel. They are running them at 58psi, vs. the industry standard of 42psi.
If you are trying to reduce costs, you might consider keeping the TN injectors, but running a return fuel system, and increasing your differential fuel pressure to about 60psi.
Originally Posted by vq35carel
yes they are maxed out you should make 350rwhp to maybe 385rwhp safely for daily driving
NOT true at all..... Those injectors a very UNDERRATED.... I had mine at 430rwhp and was perfect... for low four hundreds you dont need to waste the money to get bigger injectors if you already have ones that handle it. I have done this!!!! And I am still doing it running perfectly. Listen to someone who has it not people who are just stating opinions.
Originally Posted by MIAPLAYA
Or going for Stage 1.5 and 510s...at 43 PSI of differential pressure they should flow for mid 500s
Without buying new injectors.
Originally Posted by Sharif@Forged
I was showing him the more cost effective approach. Without buying new injectors.
Without buying new injectors.
Thread Starter
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From: Chino CA 91710
Ok guys I have decided to go with the upgraded injectors. Since my car is at the shop right now I would like to be able to get some injectors at a good price today. I really miss my car and would love to have it before christmas.
So does anyone now where I can find some today in my area?
Also up to what WHP can I tell them to tune my car safely on the stock block?
Gilbert
So does anyone now where I can find some today in my area?
Also up to what WHP can I tell them to tune my car safely on the stock block?
Gilbert
he does cross shipping of the injectors so you pay for a core charge and once he recieves your STOCK NA injectors he will refund you
Last edited by nissansource; Dec 21, 2005 at 01:37 PM.
