Mpt70 dyno results (kind of disapointed) tuning question.
 

Ok well Kilo just called me this morning and told me the numbers. He said at 20psi it made 458rwhp and 389tq which is not bad at all but it is lower than what I've seen before with the same or even less boost on the same port and turbo. One thing he said was odd is that my car was not running right when the AFR was in the 10's so he brought it down to 9.2-9.6 and he said it started running perfect. What would you guys think the cause of a car wanting to run that rich be? He couldn't turn the boost up any more because he said the fuel pump was losing pressure and I would emagine because the motor has to run so rich this would probably be the reason.

Anyways I don't think 458rwhp is too bad and I'm not sure what dyno he is using but I'll get that info later. Any insite as to why this could be happening would be much appreciated.

Well for starters, which plugs are you using? Also, I was running in the 11.5-11.9 area on race gas. I don't see how the car is even running properly running so rich in the 9s. You definitely have more HP to be made.

The key to pulling HP out is the ignition aggressiveness...if that is a word.

Your torque is a lot and should run hard.

I was using racing plugs 11.5's the expensive ass moma jomas :) I have no idea how it's running so damn rich either. That's the first time I ever heard something like that before. That's why I'm trying to figure out just what the hell could be causing that.

that is retarded rich. you should pick up a fair amount of power leaning it out. fuel pressure is definately because of the amount of fuel being used. what pump/injector combo are you running?

I'm running an 044 with a kenne bell boost a pump set to 20%. I've got 850's up front and 1600's for the secondaries. he said when it was any more lean it would spit and sputter and just wouldn't run right.

Something is way wrong somewhere. I would figure it out before the car is run again or you're going to end up with a blown engine.

:( This is someone somewhere telling me I need to give up on the go fast thing and just stick with my freakin' stock turbo vert ...

There's something goofed there, Cameron.

B

In my experience, running in the low 9's makes the car almost hit a wall. It won't want to rev, it sounds god awfully choked and is just unhappy in general. I'm not saying that its not possible, just stating my experience.

Something is absolutely a miss. But the TQ sounds nice! What kind of advance is he running? What about ignition? Been awhile since I went over your build thread...

So if we were to start talking about what could cause an issue like this would anything pop out in anyone's mind? I can't think of anything that I've heard regarding this issue before and you guys have way more experience than I do. Any thoughts?

I'm not sure the timing that he is using but I'll get that info as well. As for ignition I have a microtech lt10 with the x4 box as well as 2 crane fireball hi-6 amps and 4 lx92 coils. I'm using the 11.5 spark plugs as well as an 044 pump and kenne bell boost a pump set to 20%. The motor is a bdc half bridge port and kilo added dowel pins and black seals. I've got a 24x12x3 intercooler up front with 2.5" pipe and a rfl bov that will be changed to a TiAl 50mm later on. I've got alky injection but he isn't using it and that's about it. I'm sure I'm missing some stuff but I haven't seen my car in a bout 4 months and haven't driven it in about 4 years so I'm always forgetting things about it.

Have you tuner check to make sure the wideband is calibrated properly or not bad. It may in fact be in the mid 10's AFR but the O2 is saying it's in the 9's. I have seen a bad O2 throw all sorts of funny readings. The car shouldn't want to do much of anything with AFR's in the 9.2-9.6 range, as most have stated already.

Ok I'll ask him that. I know he was using the dyno's wideband but I also have one in the car as well so I'll see if maybe both were giving the same reading or if he even noticed. Thanks for the advise.

+1.

B

I can think of plenty of things but we'll be lucky to get any feedback from those questions from your tuner. ;)

B

That still doesant explain the fuel pump issue, if the wide band is off it still does not explain why he cant turn up the boost becouse fuel pressure drops.

I know people have luck with the boosta pump but ive also heard some had to remove them becouse they were more of a restriction that a benifet.

It should make 458h/p just on the 44 pump!

Just a thought something doesant sound right. And i would guestion if they have road tested it yet, those afr's should keep people off your ass!:lol:

+2

And a clogged fuel filter can restrict the pump only enough to be noticable at higher loads.

Whats are the egts like?

I agree with Sean.. The AF Meter is probably wrong..
9.2 af will definitely huff black smoke out that back...

Rofl, no doubt. This is going to get on my nerves bad and I can already tell I'm going to need to bring it to another tuner... Maybe BDC will be coming down here one of these days :)

Anyways thanks guys for your input, I greatly appreciate the help so far. Things I'm going to ask the tuner.

What timing is he using? What is the advance?
Did he check to make sure both widebands were telling him the same thing?
What were the egts?

Things I need to check when I get it back next week.
Clogged fuel filter
maybe undo the kenne bell boost a pump and check a/f ratios carefully?

I wouldn't pull the KB off just yet.

Add fuel sock to your fuel filter check.

Will do. All the pump stuff is external so I have a 100 micron fuel filter before the pump and a 40 micron after it or visa versa (which ever way you're supposed to have it). Both are brand new however I have seen people get clogged fuel filters with stainless steel braided stuff that accidentally dropped on the inside of the fuel line when cutting and fitting the line. Perhaps that is what happened here?

you can actually feel the power dropping off when you get richer than 11.0:1 . it's that noticeable.

This is Ryan btw... ;)

You dont need a BAP on an 044 pump. What ignition are you running? I would probably agree with others that the wideband is way off. What type is he using? Some of them run rich when the sensor goes bad.