![]() |
Fuel Pressure at Idle 750cc injectors?
Anyone running 700 or 750cc injectors with a non bypass (stock with a larger pump) system and know there fuel pressure. I just added a port and if the electronic sensor and the rest of the electronics are correctit is over 50 PSI at idle. I falls to 37.5 at any throttle setting above idle. I think the short cycle time of the 750cc injectors with the higher pump volume is more that the factory in tank regulator can bypass.
|
Take it your under boost? Be better if you listed your mods in the thread.
|
GTM 1.5 SC, 750cc injectors, 255LPM pump. Custom tune from Bear383's file custom 82mm pulley (13 PSI)
Items in work - stealth nitrous with remote opener. When I add the extra fuel with the 750cc injectors I need to make sure the fuel pressure holds. A 50 shot ramped in as a function of RPM (gears 3-6) should produce 650 RWHP and 500-ish torque smooth enough to make the stock internals last. |
I took some more readings 63.75 at idle. 56.25 off idle. any toughs? before start 48.75
|
Your injectors have nothing to do with your fuel pressure.
Most likely, you upgraded your fuel pump, and did not modify your pump module to support the fuel pump. http://www.the370z.com/forced-induct...ml#post2784717 |
Quote:
|
1.5 SC and NOS this is going to end well :/. Why people why
|
They may have a different latency setting too -- are you sure you have all the correct spec data inputted into the fuel injector tables?
Examples of what I'm talking about: Theory: An Injector Model « Moates Support https://github.com/javiermuniz/tunin...jector-Scaling I think on uprev you can adjust this -- possibly by way of the k multiplier? |
Injector latency settings will not have any side effects on fuel pressure. I have never seen a latency table in the UpRev before, but it all gets tuned around anyway.
|
2 weeks on the road, back now. After some math, I have a 11.5 PSI drop in fuel pressure from idle to WOT. Cruse is almost the same as Idle, only a 2.5-3.2 PSI drop. I can't be sure if of the starting pressure. I do have gauge that reads in .25 lbs but it needs calibrated. I hope to see the Idle pressure come down with the next fuel system mod. I have a spare stock pump assy and will be installing a 340 LPH in it with HD wiring and DPST high amp relay.
|
All times are GMT -5. The time now is 12:17 PM. |
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2