Dynoed the car today. I only made 290 Max HP and 269.5 Max Torque. My air/fuel ratio was 10 from 5100 rpms to 7800 rpms.

I need the maps to fix this. Should my air/fuel ratio be around 11.5 in that rpm range?

How much power do you think I should be making with my mods? I was told the car was dynoed a year ago and that it made 340 rwhp.

I dynoed the car with 93 octane. I am not sure what octane the car was dynoed at when it made 340rwhp.

I am attaching the spread sheet of the dyno run.


Thanks for the help. Now I know why my car is only running mid to high 12's....

 

How much boost was that at Bill?

 

14.5 to 15 lbs. 1 bar

 

Didn't Mohammad say it hit ~340 on race gas?

 

Yes...

I know the car can make alot more power I just need to get her running better!!!

 

Yeah, at 14-15 psi it should be making about 340 rwhp - could also be from the heat - was was the room temps in the dyno room? I've seen cars dyno at 30-35 rwhp more when it cools down 25 degrees at night - could be a lot of factors but 10.0 a/f is rich

 

On the read out the intake air temp was 100.4 F. I had 2 huge fans blowing directly into the intercooler. I don't think it was more than 90 degrees in the shop.

 

A lot of sensors "min out" at 10.0 -meaning it can be below 10 and it still shows 10. I tuned for 10.5-11.0 on the dyno because it will lean out on the street a little.

 

i read your sig...a 109 trap is definately indicitive of 290 rwhp. A 114-116 trap is 340 rwhp.

 

Are you seq or non seq???

STEPHEN

 

If you look at the plot both HP & Torque take a dip. LIke Marshall says your A/F could be much richer than 10:1 since that's the limit of the sensor.

You can try to tune it down to 11:1 & see what the output is there, but I can't stress how important a well designed ignition map is. I assume you are running the Apex'i ignition maps?

 

opps

 

non-sequential.

Yes I am running the apexi ignition maps.

I am going to have Mohammad at MZM International look at my maps tonight and do some adjusting. I will re-dyno the car later this week.

 

its hard to really tell things without seeing an actual graph but it looks to me like if your seq your 2nd turbo isnt kicking in.

Which would also explain why your a/f falls off the charts after transition.

STEPHEN

 

Well this dyno would explain your 4 mph drop in trap speeds (~30 rwhp). You were making 330-340 when you did 113 mph.

The curve gets pretty jagged after 4500 rpm. I don't think the car would make 290rw without the second turbo, he also said it was at 15 psi.

Bill, Did you add the 1000cc injectors or were they already there and tuned in? It looks like your getting way too rich and getting ignition breakup.

 

Here's the graph, yikes!

 

Also work on the ignition maps, I think the Apexi ones have some negative split in them and are a little agressive at some points (around peak torque) and have way too much split pretty much everywhere.

At any rate, there's a reason you dropped 30-40 rwhp. Did you make ANY changes between the 113 mph and 109 mph run?

 

why did u say yikes?
is it b/c of the choppiness way up top...my graph does something like that too...what is that...i heard spikes up top are usually lean spots

 

Matty,
Yes, his choppiness is fairly severe. Note how the power just stops at 5500 rpm. It should continue well on and peak around 6700-6800 rpm. A few minor bumps are ok as they are the nature of the data sampling of the dyno -most dynos have a smoothing function to eliminate the minor stuff. Big bumps can indicate ignition break up (from being rich, bad ignition, blowing the spark out, etc) or lean spots. However, in order to be lean enough to show big bumps on the dyno, you're well on the way to popping a motor.

 

i want to get mine up...look for it soon...let me know what ya think.

 

Marshall...the big difference between the 113 and 109 trap speeds was the outside temp. The 113 it was in the 50's and the 109 it was in the high 80's/low 90's. The 113 pass was on street tires and the 109 was on et streets.