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| Project 3400 Roller Cam Block (Page 51/82) |
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sleevePAPA
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JUL 23, 01:03 PM
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| quote | Originally posted by lou_dias:
After speaking with my brother and having him look at my a/f ratio I'm either going to need higher fuel pressure or new injectors down the road. One of the many cars he's owned was a 5.0 Mustang that put down 235 rwhp on stock injectors. In V6 terms that's ~176 rwhp. He was at the limits then. With my true peak at 5200 and my low dyno going lean after 5400, I should be somewhere between 168-176 rwhp. My shift point is what concerns me. For my peak to be at 5200, my shift point needs to be atleast 5500 rpm and perhaps 5600 or a bit more. An HP loss is an hp loss. I need a little more fuel to maximize my shifts. My "curve" goes down faster because of lack of fuel. A cam with more top end will only make the problem worse.
An adjustable FPR will probably be the Band-Aid I use for the time being. My guess is 45psi at idle instead of ~39. Thoughts? |
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I thought factory FPR setting was ~43 psi? if the rating for the ford injectors is 19# at 39psi, 43psi should flow enough for the demands of your engine. keep in mind that fuel demands are greater at peak torque rather than at peak horsepower. Once your AFRs are dialed in, refer to your injector PW to verify your DC. your using $88? if so the PW should be in the ADX.
heres a vid of a short pull in my mustang, im using 19# bosch III injectors and its still rich up top **but havent reached the limits. With the work done to the 302, im guessing the power is around 250 rwhp. PW decreases the further away from peak torque, WB AFR is on the far right and PW guage is overlayed on the tach graphic.
http://www.youtube.com/watch?v=IeTVH0F1DrE
*edit*
100% DC for batch fire
RPM.....PW ms
1,000....60 ms
2,000....30 ms
3,000....20 ms
4,000....15 ms
5,000....12 ms
6,000....10 ms
**EDIT AGAIN, disreguard the above statement, its been awhile since I drove and even tuned the mustang. Those look like they are going static at 6100 rpm.[This message has been edited by sleevePAPA (edited 07-23-2013).]
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Blacktree
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JUL 23, 02:44 PM
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| quote | Originally posted by lou_dias:
An adjustable FPR will probably be the Band-Aid I use for the time being. My guess is 45psi at idle instead of ~39. Thoughts? |
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If you crank up the fuel pressure, your rich condition at low RPM, and your stumble on take-off, are going to get even worse. What you REALLY need to do is go into the fueling tables and make the necessary adjustments.
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lou_dias
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JUL 23, 10:42 PM
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| quote | Originally posted by Blacktree:
If you crank up the fuel pressure, your rich condition at low RPM, and your stumble on take-off, are going to get even worse. What you REALLY need to do is go into the fueling tables and make the necessary adjustments. |
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I would increase the fuel pressure and decrease the BPW vs Bat Voltage... As it stands, I had to cut 30% off the BPW when SleevePPA linked that Mustang injector sheet. No wonder I was getting flooded and my idle erratic...
I'll be plugging in the new burn tomorrow morning and taking the car to work to see how it runs. Next race is in 11 days or so...[This message has been edited by lou_dias (edited 07-23-2013).]
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lou_dias
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JUL 23, 10:48 PM
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| quote | Originally posted by sleevePAPA:
I thought factory FPR setting was ~43 psi? if the rating for the ford injectors is 19# at 39psi, 43psi should flow enough for the demands of your engine. keep in mind that fuel demands are greater at peak torque rather than at peak horsepower. Once your AFRs are dialed in, refer to your injector PW to verify your DC. your using $88? if so the PW should be in the ADX.
heres a vid of a short pull in my mustang, im using 19# bosch III injectors and its still rich up top **but havent reached the limits. With the work done to the 302, im guessing the power is around 250 rwhp. PW decreases the further away from peak torque, WB AFR is on the far right and PW guage is overlayed on the tach graphic.
http://www.youtube.com/watch?v=IeTVH0F1DrE
*edit*
100% DC for batch fire
RPM.....PW ms
1,000....60 ms
2,000....30 ms
3,000....20 ms
4,000....15 ms
5,000....12 ms
6,000....10 ms
**EDIT AGAIN, disreguard the above statement, its been awhile since I drove and even tuned the mustang. Those look like they are going static at 6100 rpm.
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250 hp is what I heard the MAX those injectors can do in a Mustang...but with dyno variation, your 250 could be my brother's 235... So it really looks like we are on the edge here...
As for fuel pressure, perhaps my FPR needs some freshening up...
Oh and I'm running the $A1 ...[This message has been edited by lou_dias (edited 07-23-2013).]
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Blacktree
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JUL 23, 11:36 PM
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What you need to do is trim the fuel at lower RPM and increase fuel at upper RPM. Not to be rude, but fiddling with fuel pressure and BPW vs Volts isn't going to accomplish that.
The most direct route to address that problem is to adjust the VE tables. For starters, you could play with the VE Adder vs RPM table and see if that helps. Reduce the VE values from 4000 RPM on down, and increase the VE values from 4400 on up.
And to address the bogging on take-off issue, go to the AE Async Pulse Multiplier vs Coolant Temp table and reduce the values across the board.
Best of luck. And if you need any help with the programming, let me know. I also have TunerPro, and run the $A1 code mask with my 3.4 V6.
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lou_dias
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JUL 24, 06:53 AM
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Will
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JUL 24, 09:00 AM
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| quote | Originally posted by lou_dias:
250 hp is what I heard the MAX those injectors can do in a Mustang...but with dyno variation, your 250 could be my brother's 235... So it really looks like we are on the edge here...
As for fuel pressure, perhaps my FPR needs some freshening up...
Oh and I'm running the $A1 ...
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The orange top injectors? I'm pushing 312 at the wheels with 8 or those in my Northstar.
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sleevePAPA
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JUL 24, 11:44 AM
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| quote | Originally posted by Will:
The orange top injectors? I'm pushing 312 at the wheels with 8 or those in my Northstar. |
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Batch fire or Seqential?
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ericjon262
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JUL 24, 03:45 PM
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| quote | Originally posted by sleevePAPA:
Batch fire or Seqential?
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doesn't really matter, sequential only really effects bottom end stability, by the time you start getting higher in the RPMs, the fuel is moving too fast for there to be a notable difference
in will's case, each of his injectors are supplying ~26 HP, which equates to ~160 HP for a V6.
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we're in desperate need of a little more religion to nurse your god-like point of view...
Built not bought... Because bolt-ons don't.
http://www.fiero.nl/forum/Forum2/HTML/119122.html[This message has been edited by ericjon262 (edited 07-24-2013).]
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sleevePAPA
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JUL 24, 04:02 PM
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| quote | Originally posted by ericjon262:
doesn't really matter, sequential only really effects bottom end stability, by the time you start getting higher in the RPMs, the fuel is moving too fast for there to be a notable difference
in will's case, each of his injectors are supplying ~26 HP, which equates to ~160 HP for a V6.
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eh?
batch fire(single injector driver ECMs) fires the injectors twice per 2 revolutions(720*), sequential each injector once per 2 revolutions. So batch firing injectors have roughly half the time to fire before they are static. If you look at the vid I posted above, just looking at the realtime data, the PW is ~9.41 ms at 6100 rpm. Thats why the WB goes rich, the injectors are static. Now if I was using the EEC with sequential injector firing, it would be ~55% roughly.[This message has been edited by sleevePAPA (edited 07-24-2013).]
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