WiseMen Log Help

[awd93talon]

93 talon, 8:5:1 ross pistons 14b, warblo 255 510cc, safc1 18psi, 3rd gear pull

 

[pianoman]

The o2 readings seem a tad low, they should be in the .89-.9 range. The 14b at that boost level might be a little out of its efficiency range, so the air might be a little too hot for the IC to cool the charge down.

When I ran my big 16g at that boost level, it was still in the efficiency range of the turbo.

 

[awd93talon]

anyone else

 

[DSMstatus]

looks like you got some knock, might want to tune you air/fuel a little bit and also timing.

 

[awd93talon]

ya i know thats why i posted it, to get some more deaitled help.

 

[steve]

The O2s are really low but your mid and high fuel trims don't act like the O2 is shot.
Have you driven the car enough to update them? The low trim shows what happens with FRP overrun. Are you pulling more fuel out on the high settings compared to the lows?

Timing is pretty low considering the knock isn't too bad until 4k.

Your TPS is reading low. It should be 10% at idle.

Hitting 1603Hz logging cap at 4500 seems a little early. Have you pressure tested the intake and how long did it hold 20 psi.

Steve

 

[awd93talon]

ill pressure test it today. ill also post my safc settings.

 

[awd93talon]

my safc settings

1k 2k 3k 4k 4.5k 5k 6k 7k

-4 +2 +5 +4 +3 +2 +1 -4 high

-2 +2 +4 +4 +3 +2 +1 0 low


th point 30 80

 

[awd93talon]

can anyone help me with this stuff. im kinda lost here.

 

[steve]

How did you wind up with those settings?

Just correcting for the difference between 450cc injectors and 510cc injectors should start you out with both low and high set to about -10%. Are you sure your fuel pressure is set right?

Steve

 

[awd93talon]

that was the closet i could get it not to knock. i dont know what the fuel pressure is.

 

[-silencer-]

that was the closet i could get it not to knock. i dont know what the fuel pressure is.

Perhaps get the supporting mods of a fuel pump, fpr, & fuel pressure gauge before upgrading the injectors? You should at least have a fuel pressure gauge if do anything to change the fuel system..

 

[steve]

He's got the pump but not the others.

Steve

 

[awd93talon]

the fpr is only for idle. i just want to know why its knocking, heatsokeing the intercooler or too much boost, and how to set up the afc, i know that i need to set the cor at -10 for the injectors, but if i give it too much fuel the car starts to sound wierd and it feals like its getting fuel cut. Also i dont know about the low and the high settings, are they soposed to be the same.

 

[steve]

The FPR is for anytime the engine isn't eating the fuel the stock FPR can't dump back to the tank because that pump is too big. That includes at idle, everytime you back off the throttle, when you shift, when you coast, so pretty much during around town driving vs WOT

Right now you have the SAFC set up to give more fuel that it would get with stock 450s. At 3k 15% more fuel. With that much fuel your O2 should be pegged but it not. Are you running a hacked MAF?

The high and low settings somewhat match the two modes the ECU runs in. The low settings usually closed loop mode and the high settings for open loop at WOT

How old are the knock and O2 sensors?

Steve

 

[awd93talon]

yes i have a hacked mas, i dont know how old the o2 and knock sensor are. But what do you think of the log should i add more gas at those rpms? because i had it higher and i was getting more knock are started running like crap.

 

[steve]

Should i add more gas at those rpms? because i had it higher and i was getting more knock are started running like crap.

Why would you want to add more fuel? You can get rich knock too.

You need to check the knock sensor to make sure it's not leaking goo and you need to make sure that the O2 sensor is switching normally in closed loop wile giving reasonable gas mileage.

How did your intake pressure test go?

Steve

 

[awd93talon]

i dont know if i needed to add more fuel or take more away. i have tested the intake before, there is no leaks and it hold the psi fine, but i only tried it at 15psi. ill check the knock sensor tommrow. but for the 02 i dont know how to check it. ill probley end up getting a new one.

 

[awd93talon]

steve i was gonna ask you, do you know what the compression is for 8:5:1 ross pistons?
i also have tripple metal head gasket.

 

[steve]

Steve I was gonna ask you, do you know what the compression is for 8:5:1 ross pistons? I also have tripple metal head gasket.

Well, it would be 8.5:1 on a car with a normal head gasket and unmachined block and heads.
Using a thicker gasket will lower the compression and machining the surfaces will raise it.

You can ask Ross what combustion chamber cc's they base their numbers on and measure yours to figure the actual CR.

Steve

 

[droptopgst]

I'm no master but I would say to add a little fuel to 4,000 and see how it looks from there. Not sure how eff. the 14b is when you boost that high, I know the knock from 6k on if it was a T25 could be the turbo not having any life left at that high an RPM. What is the temp. outside when you did this run? Try it when its a little cooler (night) and see how it looks.
Good luck

 

[steve]

Yes I have a hacked mas

That would explain your SAFC settings some. I really dislike hacked MAFs since you wind up with a unique to you set of corrections for the way it flows air and no baseline to work from when changing other parts.

Steve

 

[awd93talon]

ya im gonna swap out the hacked mas. I checked my fuel pressure it was 45 with the hose off, and 43 with it connected. Having the fpr overrun with that make it harder to tune. Steve were is a good place to buy a fpr?

 

[steve]

Unless you have big plans for this car it's a lot cheaper to buy a smaller pump.

Steve

 

[awd93talon]

would the stock pump be enough at 17 or 18 psi.


will the fpr overrun affect my tuning with the afc?