last night i was tuning my gsr and before i had a erick racing chiped p72 and ran good and i was using a vafc to remove fuel all over the rpm range up to 9500. after getting the base idle, cruise, and low throttle dialed in we started tuning for wot. the car was good low to mid range and when we were at 6800 it started to lean out. so we added fuel fuel and more fuel to only get the car to rev to 7400 before leaning out (we had 310's at 95% at this time). i did not know if any crome tuners have had any problems like this? we put the old chip back in the car and it was around 12.8 all the way to 9500. any help woudl be great
Thanx


Modified by slo blue at 4:02 PM 4/5/2007

 

what wideband are u using to tune with?

btw its crome not chrome

 

Crome's Injector Duty cycles are way off. Dont trust them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d15Beta &raquo;</TD></TR><TR><TD CLASS="quote">what wideband are u using to tune with?

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a LM-1 and AEM uego

we used the LM-1 as the primary o2 sensor.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zCivic &raquo;</TD></TR><TR><TD CLASS="quote">Crome's Injector Duty cycles are way off. Dont trust them. </TD></TR></TABLE>
even if they were way off we started with the old chip as a base and changing it.
so i was taking fuel out before and with the crome running the car i cannot put enough into it.

 

do you still have the vafc hooked up??

 

we removed it when we were tring to tune with crome

 

Yes what Z civic said... The injector duty cycles are wayyyyyyyyyyy off

 

Ok read your base map with your programmer. Import the file into crome and start removing fuel. You said you were at 95% duty cycle in first post so was that prior or after your started with your base map. When I was tuning my car I was at 112% on 345's due to the duty cycle calculator being wrong. Just use the basic calculator based on Crank HP # of cylinders etc... which can be almost anywheres and if still in doubt get larger injectors

 

i imported the ericks tune and changed the from there. with crome running with the ericks tune the car would go lean. i was just tring to see is anyone has had any problems like the fuel pump is not supporting the motor when using crome.
i have a set of rdx injectors but another motor that had the same mods using hondata the 310's had room to grow.


Modified by slo blue at 9:15 PM 4/6/2007

 

For starters the ECU does not control fuel pump pressure. The fuel pump is either on or off. I have seen base maps created with other programs and opened and tuned with other programs cause conflicts. need to find what the erick program was made using or find a close Crome map and start with it. To answer your question I have not had a problem adding/removing fuel with Crome using a base that was created with Crome.

 

[QUOTE=zCivic]For starters the ECU does not control fuel pump pressure. The fuel pump is either on or off. QUOTE]
i know that i thought the factory pump may not be sending enough fuel at higher rpms.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slo blue &raquo;</TD></TR><TR><TD CLASS="quote">[QUOTE=zCivic]For starters the ECU does not control fuel pump pressure. The fuel pump is either on or off. QUOTE]
i know that i thought the factory pump may not be sending enough fuel at higher rpms.</TD></TR></TABLE>

But if you put the old chip in at and it was @ 12.8 all the way to 9500 like you said then that can't be the case. It's not a fuel supply issue if it was @ 12.8 up to redline on one tune but not on another.

When in doubt of a fuel supply issue make the values in the load cells that you're trying to richen up inordinately huge so that it'll either go pig rich (not a fuel supply issue) or stay lean (fuel supply issue).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by david@didrace.com &raquo;</TD></TR><TR><TD CLASS="quote">

But if you put the old chip in at and it was @ 12.8 all the way to 9500 like you said then that can't be the case. It's not a fuel supply issue if it was @ 12.8 up to redline on one tune but not on another.
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i did not think it was a fuel issue just trying to find info on the crome fuel issue.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by david@didrace.com &raquo;</TD></TR><TR><TD CLASS="quote">
When in doubt of a fuel supply issue make the values in the load cells that you're trying to richen up inordinately huge so that it'll either go pig rich (not a fuel supply issue) or stay lean (fuel supply issue). </TD></TR></TABLE>

we made it inordinately huge and got another 600 rpm before going lean.

 

this is using rdx injectors right??