Can somebody analyze my Dyno for me?

[DeathBeast]

My car loses power at around 5500 RPM even at low boost. The guy at the dyno couldn't figure out why. The only thing he could think of was a bad wastegate. What do you think is wrong with my car?
(My mods are in my profile. Pretty much: 14b, 2G MAS, 2.5" exhaust, 550s, 255lph fp...)

Run01-20PSI
Run02-15PSI
Run03-12PSI
Run04-10PSI

Thanx,
DeathBeast

 

[Ryans99OZ]

im kind of a noob at dyno's but shouldnt ur A/F ratio stay constant? and not drop off...pry has nothing to do with it but i dunno

 

[14.5 drift]

In my very limited experience (none really, I just read the boards alot) I would say it has to do with your air fuel ratio. Towards the end there it is some thing like 10.5/1 wich is very rich, too rich. What is your base fuel pressure set to? Seems the consensios around here is that the dsm's like the 12/1 ratio best, give or take

 

[IMMORTALSPYDER]

could be your turbo is just running out of steam. But it's problaby cuz you start running way richer than when you're at lower rpm's.

 

[CanadianTSi]

He's not that Rich, it only gets down to 11:1 which is a little rich but still keeping it safe.

It looks like you're to lean up untill 4000. After that you need to figure out why you're breaking up in the high RPMS.

How's the compression on the motor?

 

[gsxitement]

alright you're running pretty rich up top, but not enough to cause that oscillation that you see at about 6k on....we usually tune cars to about 12.7 a/f. and the fact that you have 550's and a 255 fuel pump you do have a lot of fuel on tap. do you have an afc? pretty much you do want that graph to stat pretty flat. consistency is the key. that oscillation up top is either some type of ignition trouble, or the turbo running out. i'll try and post some graphs from here at work so you can look at them and see what i mean.

 

[DeathBeast]

do you have an afc? pretty much you do want that graph to stay pretty flat. consistency is the key. that oscillation up top is either some type of ignition trouble, or the turbo running out. i'll try and post some graphs from here at work so you can look at them and see what i mean.

1.)I have an Apex-i AFC, and the Buschur FPR. (The guy didn't want to continue tuning my car because he couldn't figure out why it was breaking up above 5500 RPM. He told me to get my turbo wastegate checked out)
2.)So would a good plan of attack be to change plugs/wires first, and then if that doesn't work look at the turbo? (I really wouldn't want to spend any money on the 14b, I would probably just swap in an EVO3 Big16g).
3.)Am I going to blow anything up, or damage my car running like this for a while. (I usually just shift at 5000RPM.)
4.)I would love to see some other graphs to compare my car to!
*I'm a noob at fuel tuning so bare with me

Thanx,
DeathBeast

 

[Ryans99OZ]

might wanna look into an msd ignition

 

[guitarXgeek]

might wanna look into an msd ignition

I do belive the stock ignition provides more than enough for most DSMs. Unless of course his has a problem, but I would stick with the OEM ignition, it's plenty good enough!

 

[Maglin]

Here is an idea. Check your plug wires for any cracks or burn holes. Then check your plug gap's. Don't think it's spark blow out due to same pattern at lower boost though. What about boost leaks? You might want to check that out. And Last I guess is how is your blow off valve? If it's leaking during the boost leak check it could be the culperate. Might be the vac line going to it isn't attatched or it could have a rip and it's fluttering, even at lower boost levels. I'm just throwing out the freebie idea's.

 

[PieTSI]

Check your timing belt, check for boost leaks, check your spark plug wires and plugs, and also check out your oil. Also check out your compression.

 

[gsxitement]

the dyno sheets on my computer here at work are dgp files....anyone know how to convert it to a usable file to put up here?