Dynoed @220rwhp with only a few mods
03-12-03, 11:45 AM
#52
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Originally posted by importboi22
taken from rx7.com
"ECU Controlled Max Duty Cycle is the maximum injector duty your reprogrammed computer uses. For reprogrammed ECUs, please contact your ECU programmer for specs. If unsure, use 80%. The Stock ECU is approximately 58-63%"
taken from rx7.com
"ECU Controlled Max Duty Cycle is the maximum injector duty your reprogrammed computer uses. For reprogrammed ECUs, please contact your ECU programmer for specs. If unsure, use 80%. The Stock ECU is approximately 58-63%"
03-12-03, 12:48 PM
#54
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Originally posted by importboi22
taken from rx7.com
"ECU Controlled Max Duty Cycle is the maximum injector duty your reprogrammed computer uses. For reprogrammed ECUs, please contact your ECU programmer for specs. If unsure, use 80%. The Stock ECU is approximately 58-63%"
ive always wanted to use that smiley
taken from rx7.com
"ECU Controlled Max Duty Cycle is the maximum injector duty your reprogrammed computer uses. For reprogrammed ECUs, please contact your ECU programmer for specs. If unsure, use 80%. The Stock ECU is approximately 58-63%"
ive always wanted to use that smiley
Basically, if I had to guess, I'd say a normal ECU would NOT cut out injectors at any duty cycle because it's safer for the engine to have the fuel, rather than starve it trying to protect the injectors. I'm pretty sure Sandor is maxing out his injectors...
Boris
P.S. The only one allowed to ****-talk in here is ME!
03-12-03, 01:28 PM
#55
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the fd ecu drives its injectors to over 90%, and it seems like the t2's do also. has anyone done actual testing?
http://www.newwave.net/~flanham/wlan.../3modrule.html
mike
http://www.newwave.net/~flanham/wlan.../3modrule.html
mike
03-12-03, 01:36 PM
#56
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last I checked the t2 computer will let the secondaries reach a duty cycle or 80 or 85 percent. However the primary injectors are limited to a much lower duty cycle from the computer, I want to say maybe 60 percent but I think it's lower.
03-12-03, 01:57 PM
#57
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Originally posted by gsracer
last I checked the t2 computer will let the secondaries reach a duty cycle or 80 or 85 percent. However the primary injectors are limited to a much lower duty cycle from the computer, I want to say maybe 60 percent but I think it's lower.
last I checked the t2 computer will let the secondaries reach a duty cycle or 80 or 85 percent. However the primary injectors are limited to a much lower duty cycle from the computer, I want to say maybe 60 percent but I think it's lower.
it seems liek everyone is takign numbers out of their *** and posting it, i want some real data proof.
and like i said at 220 wheel TQ the injectors are MAXED this means all 550s are at 100%
03-12-03, 02:12 PM
#58
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Originally posted by j9fd3s
the fd ecu drives its injectors to over 90%, and it seems like the t2's do also. has anyone done actual testing?
http://www.newwave.net/~flanham/wlan.../3modrule.html
mike
the fd ecu drives its injectors to over 90%, and it seems like the t2's do also. has anyone done actual testing?
http://www.newwave.net/~flanham/wlan.../3modrule.html
mike
Bottom line is this: IF you believe it cuts at 62% (which I still doubt), or not, DO NOT TEMPT FAITH, and GO ON A DYNO! That's the bottom line. Arguing is lame... it proves nothing unless there's real numbers involved. On Sandors car, for example, I saw the injectors maxed out, and he cannot push past 10psi (even that's pushing it).
As a side-note, aren't FD injectors 550primaries, and 850 secondaries? That would explain why _THEY_ can run up to 14psi boost maxing out those injectors... FC are 550/550... correct?
If this goes on long enough, next time we dyno, I'll check the voltage on Sandor's injectors to prove they're being maxed out... arguing is boring and proves nothing, once again. Also... are there any sources that can confirm this other than some guys website?
Boris
P.S. Read this (http://www.newwave.net/~flanham/wlan...fuelfaq.html#1) you'll notice the ECU allows the Injectors to go up to 100% duty cycle.
03-12-03, 06:03 PM
#60
Keep Right Except to Pass
Originally posted by ///3oris
But here's the deal with fuel pumps:
THEY DO NOT INCREASE YOUR FUEL PRESSURE!
, but before you think a fuel pump will increase your fuel pressure, think twice.
But here's the deal with fuel pumps:
THEY DO NOT INCREASE YOUR FUEL PRESSURE!
, but before you think a fuel pump will increase your fuel pressure, think twice.
On my car the Walbro increased my line pressure by about 3#. I measured it.
Sorry, you guys have moved on, but I couldn't let it go.
03-12-03, 06:30 PM
#61
I had my apex'i pressure gauge on my fuel system, and my fuel pressure went up 10 psi across the board, at pretty much all times. Even under WOT in every gear the pressure never dropped.
But that IS because the regulator was over run.
I'm wondering though, when was the last time you had you fuel injectors cleaned and flowed (to the guy that ran his car on the dyno)?
But that IS because the regulator was over run.
I'm wondering though, when was the last time you had you fuel injectors cleaned and flowed (to the guy that ran his car on the dyno)?
03-12-03, 06:30 PM
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Originally posted by HeffBoost
Please don't write stuff like this if you don't know for sure.
On my car the Walbro increased my line pressure by about 3#. I measured it.
Sorry, you guys have moved on, but I couldn't let it go.
Please don't write stuff like this if you don't know for sure.
On my car the Walbro increased my line pressure by about 3#. I measured it.
Sorry, you guys have moved on, but I couldn't let it go.
Disclaimer: UNLESS your FPR is THAT restrictive... and that's doubtful... like I said, no more BSing, we'll do number comparisons from now on... when sandor gets his Fuel Press Gauge we'll see what it is... until then, I don't buy half the stuff I read on this board... people create their own tales to ease their minds.
Boris
03-12-03, 06:33 PM
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Originally posted by Piranha
I had my apex'i pressure gauge on my fuel system, and my fuel pressure went up 10 psi across the board, at pretty much all times. Even under WOT in every gear the pressure never dropped.
But that IS because the regulator was over run.
I'm wondering though, when was the last time you had you fuel injectors cleaned and flowed (to the guy that ran his car on the dyno)?
I had my apex'i pressure gauge on my fuel system, and my fuel pressure went up 10 psi across the board, at pretty much all times. Even under WOT in every gear the pressure never dropped.
But that IS because the regulator was over run.
I'm wondering though, when was the last time you had you fuel injectors cleaned and flowed (to the guy that ran his car on the dyno)?
L8r
Boris
03-12-03, 06:35 PM
#65
Nah. I trust my Apex'i gauge, 10 psi isn't that much. Mazda didn't really overengineer ANYTHING on these cars, most of it is pretty much "good enough." Wiring, wastegates, whatever else.
03-12-03, 07:51 PM
#69
Lives on the Forum
Originally posted by ///3oris
Ok... so you're trying to tell me you DOUBLED your fuel pressure by putting in a Walboro 255? I call BS! Unless you clamped the lines... JUST putting in the walboro will not raise it that much.
Disclaimer: UNLESS your FPR is THAT restrictive... and that's doubtful... like I said, no more BSing, we'll do number comparisons from now on... when sandor gets his Fuel Press Gauge we'll see what it is... until then, I don't buy half the stuff I read on this board... people create their own tales to ease their minds.
Ok... so you're trying to tell me you DOUBLED your fuel pressure by putting in a Walboro 255? I call BS! Unless you clamped the lines... JUST putting in the walboro will not raise it that much.
Disclaimer: UNLESS your FPR is THAT restrictive... and that's doubtful... like I said, no more BSing, we'll do number comparisons from now on... when sandor gets his Fuel Press Gauge we'll see what it is... until then, I don't buy half the stuff I read on this board... people create their own tales to ease their minds.
-Ted
03-12-03, 09:43 PM
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Originally posted by RETed
You need to be careful with your claims.  I've also found a ~10psi difference when jumping to a Walbro 255lph upgrade fuel pump myself.  I think you should've done your testing before claiming sh*t that doesn't happen...
-Ted
You need to be careful with your claims.  I've also found a ~10psi difference when jumping to a Walbro 255lph upgrade fuel pump myself.  I think you should've done your testing before claiming sh*t that doesn't happen...
-Ted
HeffBoost.... hey, sorry, I misread, I thought you meant 3bar. My mistake... don't get your panties in a bunch
. Anyway... 3psi also won't do much....Let me restate my point, so there are less arguments.... WHATEVER YOU DO, whether theoretically possible or not.... DYNO YOUR CAR. EOT!
Boris
03-12-03, 09:58 PM
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Well, then they should be careful running 14psi with a Walboro alone then.... I would say it's not recommended to touch a turbo rx-7 without a dyno in the first place... everyone knows they blow...
Hey, it's not like we didn't drive for 2 hours to get to a dyno. There are always dyno's around... spend the (minimal) cash and tune the car. At least get the money's worth you paid for all your mods. Tuning is a reletively cheap (for you guys especially), and most rewarding ($/hp)... just my humble oppinion, ofcourse.
Boris
Hey, it's not like we didn't drive for 2 hours to get to a dyno. There are always dyno's around... spend the (minimal) cash and tune the car. At least get the money's worth you paid for all your mods. Tuning is a reletively cheap (for you guys especially), and most rewarding ($/hp)... just my humble oppinion, ofcourse.
Boris
03-12-03, 10:01 PM
#73
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ok well think of it this way..... 4 550cc injectors at 39psi fuel pressure flow enough fuel at 85% duty to support 280 horsepower and thats with a 11:1 fuel ratio if i lower it to a max of 63% it will only have enuff fuel to support 210hp at 11:1 fuel ratio.... so that leads me to beleive that the computer WILL NOT let the injectors open more than 63% duty dont you?