Well just got a chance to log my car on a dyno and with 0 knock all the way through i get this.





Mods include:
-injen intake (upper and lower piping)
-walbro 255 fuel pump
-hallman mbc
-perrin down pipe + highflow cat
-Apex'i gt spec catback

Right now boost peaks around 20psi and holds some where around there as you can see in the graph. One thing I noticed is my tq seems kinda low? or am I wrong? Any ideas what I can do to increase this?

 

Umm, what correction factor are they using and is that a shootout mode graph?

Looks way too high for a dynodynamics, we usually see 285-295 for turboback and a tune on IX's

 

I believe the correction was at 1.01, but not 100% sure

 

The torque curve is nice and flat which is nice. The torque does seem a little low in my opinion.

Why does the AFR jump up by like .8 @ 6200?

 

Looking good buddy!!

 

looks like either you have a wacky tune or you are having a problem with your fuel system.

The AFR curve should be MUCH smoother. It is too rich during mid range and a bit lean up top. The AFR really needs work.

Also why so little boost, that is stock like boost. You should be running at least 21-22 psi, that will help you with more tq.

Who tuned this car? or tried to at least?

 

Um no?

You torques is way low. That jump in AFR shouldnt be there.

 

Have you run a boost leak test? That could be the cause of some of the variation in the boost and AFR curves as well as the low torque.

 

Haven't run a boost leak, but I don't think its that. I am running low boost on purpose, till I get some APR headstuds. But then u never maybe I'll look into getting a boost leak check.

The jump in the AF don't really know ganna have to talk with the tuner and find out.

 

swift uses a CF of 1.15 to get it close to DynoJet. (i've seen it with my own eyes, though they might not want to tell exactly the CF)

the numbers are pretty close to the DJs i've seen, and my drag times confirm the power numbers.

your torque is real low. i dyno-d 250ft-lbs on that exact dyno with only a cat-back.

 

I wasn't saying the the boost level could be caused by a leak, but the variations in the AFR and boost curves.

I just built a boost leak tester and it cost me like $8. I say it's definitely worth it.

I got everything at Lowes. I used a 2" flexible coupling and a 2" cap fitting with a screw in type cap. I used some epoxy to make it seal up well.

 

Yeah check for boost leaks. About 80-90 percent of EVOs have a boost leak or two. You CANT tell by loggin boost or anything, you have to do a boost test.

You dont need headstuds. theres many people runing 20-25lbs of boost W/O headstuds. theres even people runing more then 25lbs W/O headstuds.

 

TB a 2" fit over the 9 turbo? I need to make one aswell

 

Four things:

1. Boost is low for an Evo 9. I am boosting 22 psi peak and holding to 19 by redline on 91 octane gas. Your tuner can do better than that.

2. The AFR is funky. Why the hell does it jump like that @ 6000-6200 rpm? Is this some new AFR tuning style that we are not aware of?

3. Your hp is two peaky. Your hp should peak around 6500 rpm and then taper down. You are hitting peak hp @ 7000 rpm. Looks like a Vtec (sp?) Honda.

4. Your torque is nice and flat, but it is low. The main reason for this is the low boost. But it could be that your running negative timing @ peak and that kills torque.

Log the car on the road in 3rd gear from 2500 rpm to 7500 rpm and post it so we can see it.

 

Yes, the 2" coupling is a perfect fit. The one I got is made for connecting PVC to another material. It came with decent clamps and all and it's on the PVC isle. It seemed too small at first, but it was the clamp causing issues.

On a side note, I pressurized the system last night and found one leak that opened up after about 12 psi ... it was on the tester itself. So, use plumber's tape if you go the route I did. Also, a spray bottle with soapy water is handy for locating those tiny leaks.