13qtr

anyone know the true flow ratings and at what psi? trick flow injectors part number TFS-89030

All I can find is 30lbs rating..nothing else.

I'm still maxing out. short story..
Went to the dyno..got afr's pretty good(12.4) where I set them at. Was leaning out just a tad above 6k. Looking at the data log I was hitting 80% dc at 4625 rpms and hitting 107% at 6375.

I put in the 30 pounders and I'm hitting 80% at 5075 and at 6100 it's at 95%.
I haven't checked my fuel pressure lately..it's a new stock regulator. My pump could be getting weak,no idea if it's still stock...154,000 on the chassis. Was wondering if the injectors are rated at 43psi or 58psi,or something in between.

If this thread needs to be moved...I'll move it...
Yes...I set the injector constant for the 30 lbs

bw_hunter

You'll have to call them to get e pressure info. They might be Bosch/ford injectors and those are rated at 38psi. They'll fit and work but you'll have to correct the flow rating up a bit in he PCM.

Injuneer

The injector data on the Trick Flow website does not indicate the pressure at which they are flow rated, as least not that I could find. As Bruce pointed out, you need to ask them.

The Ford injectors are flow rated at 2.7bar = 39.15psi. If the Trick Flows were rated at 39.15psi, they would flow 31.6 #/HR at the stock 43.5psi LT1 pressure. But we don't know what pressure they are flow rated at.

In any case, if you make 330 HP at the rear wheels, thru a T56, you should be around 380-390 HP at the flywheel, and a 30#/HR injector should be more than adequate. Was it actually leaning out on the dyno? If you are using DataMaster software, the duty cycle numbers don't seem to make any sense. The duty cycle calculation is correct, based on what DataMaster reports as base injector pulse width (BPW) and RPM, but there must be something wrong with the BPW number. I've seen numerous data logs with the DC reported as over 100%, yet there was no indication that the engine was leaning out.

13qtr

it showed leaning out maybe 0.03 afr's past 6k. We couldn't get it back down.
I haven't been back since the injector swap..to get a wideband reading.
yes...datamaster.
Since I got your attention......
Why would it show more timing than what it's commanded? Sometimes at idle it'll be 5 more than commanded and on the top end also. I may have it commanded for 31,but it's hitting 35. I've got all the egr advance stuff zeroed out. In the constant's page it was set at 38 for maximum timing..I just brought that down to 33 to check....haven't been for a drive yet.

On the real low end..(1250-1500rpm) if your cruising in 5th or 6th and just stomp it...it'll pull timing like a ****....I have seen it pull so much that it's only running 10-12 degrees. I thought about zeroing out the burst knock settings.

Injuneer

There appear to be about 3* of timing that is added based on inlet air temp. Probably others that no one has discovered.

"stomping on it" at low RPM in 5th or 6th gear is an excellent way to generate detonation. Why would you not want the PCM to pull timing? You can limit the maximum amount of timing that can be pulled out.

13qtr

I'm not wanting it to 'not pull' timing. I want to set the timing ...so the computer doesn't have to pull it. I put the . In the wrong place on my previous post....I meant 0.3...not .03
I did call trick flow......they said true 30lbs @43psi

Injuneer

And what they really meant was 43.5psi (3bar), same as the stock LT1 fuel system.

Chimera96

might want to invest $35 in a screw on FP gauge, tape it to the windshield and go for a WOT SUSTAINED run to see if FP "holds". May want to rule a potential weak pump out 1st before chasing injector values in the PCM

13qtr

got one...cost more than $35. Has longer hose. I did that about 6 months ago....all was good. I'll do it again this week on 1 of my off days. The ta just sits here on work days...have a work car.

13qtr

did a little more testing this morning. With fuel pressue gauge..it's showing around 35psi idling and cruising. Wot it shows ~43. I took it all the way to redline in 4th...it dropped to about 40 at redline, but when letting out of it..hard decel it will drop down to 30psi.

I unhooked the vacuum line and it idles at 43....I think I'll try driving around with the vacuum line capped off..

Chimera96

your FP #'s are on the low side of normal

36-38 at idle and 42-44 WOT.

The fact that it droped to 40 when you were at 6k signals it is on the low side of "normal".

It may not be low enough to translate into a lean condition but the #'s at idle and after sustained are on the low side of spec.

If you have another FPR may swap to see if there is an improvement

I use the Borg Warner unit I got at O'Rielys that is adj as my tuner said 38 at idle 42-44 WOT. Stock FPR should give those #'s. This is with vacumn line on. When I pull the line it goes to 47

This is from shbox site

Normal pressure when the engine is not running and lines have been pressurized is 41-47 psi. This same pressure should be observed at wide open throttle (WOT

http://shbox.com/1/4th_gen_tech2.htm...essure_testing

13qtr

I've got a aearmotive adjustable sitting here that I took off,about a year ago. That's when I put on a stock gm one. When the keys on,but not running it sits at 43...after 5 mins off,it's only dropped down to 40. So maybe a injector isn't leaking down.
If it matters...my car idles and cruises at around 35 to 45kpa map. On a hard decel...it'll go down to 18kpa....

Chimera96

I would stay with a stock one over Aeromotive. IMHO they don't last....and some have experienced engine fires because of leaks. They are a big company but when I bought one for a motor I was building and about 3 months later when motor was in the car I put it on and it leaked right out of the box. They would not warrenty it because I had purchased it 97 days ago.....7 days past warrenty which I felt was BS

I am not a tuner so can't comment on KPA.

Your FP is within range, just showed some drop after sustained WOT by droping to 40 PSI which would suggest the fuel pump is getting tired. I had a FP gauge on at a dyno session and watched it go to about zero on a pull....so went with a Walbro 255 about 10 years ago

I only suggested checking FP before getting into PCM changes on larger injectors just to confirm if FP was not the source cause of lean data loging. Yours seems close enough but shows signs of a pump not keeping up as you note a drop at sustained WOT droping to 40

you could put the Aeromotive on and set to normal PSI and take it out for a sustained WOT. If FP drops like the stock one that would indicate the pump is getting tired for your set up or simply you need a 255.