UPDATED PLEASE SEE POST 62

Mods are in signature. I went to get my cam install and tune to wrap up my base modification list before turbo swap in october and WOOOWWWW what low frickin numbers!

No boost leaks says tuner
New throttle body seals
Tuner says that my 9.8 hotside turbo (he didn't know that 05 evo's have a 10.5 hotside) just wont hold any boost. He said that he tried turning the boost up but it would just have bad taper and not hold so he tuned me at like 20 psi max.

I made 267 whp / around 267 tq on a mustang dyno using 91 octane.

I have been poking around on the forum trying to piece together what it could be but really would like some more opinions.

My research so far has led me to believe it could be:

- Bad WGA, has this happened to you guys much?
- Something is wrong with my turbo
- Bad Bypass valve
- MBC is ****ed up (even though I'm 95% sure I installed it the right way)

I want to buy a pinto, curl up into a ball and watch x files.

UPDATED PLEASE SEE POST 62

 

what is the mileage on the car ?

 

What kind of numbers were you expecting?

 

i think the car should of made about 300 so your not far off

 

definitely seems a little low. Like 5 or so years ago, my 8 did 295hp/274tq on that dyno. I had intake, exhaust w/ HFC, old HKS 272's, GST boost line, 760cc injectors. I think that's it.

So not super low, but my car certainly wasn't overly strong for an 8 as it was.

 

On 91 octane (depending on the weather the day of the dyno test and given the limitations you mentioned in your first post) you seem to be in the low end of the ballpark for a low reading Mustang Dyno.

Forget the numbers for a minute: Does the car run better, smoother, or faster?

 

x2



Great question - often times we get too concerned with the dyno numbers, and not whether or not the mods + tune improved the feel of the car.

 

Mileage is 46xxx

I was expecting around 290-295 for that particular dyno

Mustang or dynojet?

Yes the car is much more linear. He filled in some power up top that was not there before the tune. HOWEVER, I find when I'm on the freeway doing 60, my car is very slow to accelerate. I feel like my dad's outback is faster than my car. VERY disappointing considering all the time, busted hands, and most importantly MONEY I put into this thing.

 

Compression checked?

Valve timing could also be out after putting the S1s in. I had the same experience with my 05 VIII, and until I read up on how to dial my cams in, and then did it, I was 10-15% down across the board.

 

delete.

 

the two scariest words in life (to me)... time stops, breath deepens, heartbeat raises...

 

stock cam pulleys ?

 

Thank you for some solid advise. Do I need new gears to do this? Is it pretty simple/straightforward?

Dude, really? Yes, I down shift.

Yes stock cam pulleys

 

adj pulleys and get the cams dialled in properly

 

are we comparing apples and oranges here? i see you own a 9 and the OP owns a 8. There is also no need to degree gsc s1 cams on a 2.0. He should be getting power right out the box. the reasons for your low numbers have to be a mixture of things. for one, 91 octane is crap. your evo 8.5 turbo is restricted with its smaller intake side. i would definitely do a compression test followed by a boost leak test, also look over your parts...