Turbo install and dyno tune today on my VIII. Upgraded to a low-mile IX turbo and PPI ported stock exhaust manifold. Also added an SS eBay O2 housing; yes, the correct one.

A month ago the car had made 303hp/308trq with 91ACN on same dyno at 21.5psi.

It was a bit hotter today, even so the Mustang said 318hp/310trq at 21.5psi on ACN91. I’m a bit disappointed; I was counting on at least 20whp and hoping for even more.

I’ve searched a lot and read a lot on this forum, and I specifically selected parts that were widely used, often recommended, and had very few criticisms. My only stumble may have been the selection of the Greddy EVO2 cat-back. I’ve since modified it to be a true 3” free-flowing exhaust, so I don’t think it is holding me back.

I’m always open to ideas and suggestions. What are the weak links in my current setup? What should I choose for my next mod?

 

Does seem kinda low because stage 1 usually gets 320-330 whp. I would check all the fitments on the hoses to make sure you don't have a leak somewhere, maybe even change your oil. Next mod I would suggest would be cams.

 

biggest mods on an 8, tbe, fuel pump, mbc, hks cams, intercooler pipes 10.5 hot side, drop in filter, and a tune, that should be good for like 11s on race gas..honest opinion 9 turbo is a waste shoulda sprouted for a green

 

I cant really suggest your next mod HOWEVER, please set a realistic goal for yourself. Myself and too many others have spent THOUSANDS of dollars just trying to make more power. It starts with a cat back, boost controler, flash, etc. A year later youve spent 20k... Sorry to get off track, just please set a goal, get there, and enjoy it..

 

Green would of been a better choice. Next steps are alky and fmic, to max out your new turbo. If you would consider a bigger turbo in the future, you may want higher duration cams(272's,280's..)

 

You need some cams. Get some GSC S1's. Those are good numbers on a Mustang dyno but I would expect a little bit more.

Jason...

 

i would like to kno who tuned it and there is nothing wrong with the hks 264 cams and witch spring do you have in the forge blow off valve and witch valve is it. you should be making 320 330 with the small 264 cams.

 

It was tuned at a local performance shop. They seem to know what they are doing, although I think they have a lot more WRX experience than with EVO. I did ask for a conservative tune. AFR was a pretty flat 11.5:1.

I have the non-adjustable recirculating Forge BPV - not the adjustable RS model.
It has the lighter weight spring. Boost seems normal - 22psi tapering to ~20.

 

get rid of the helix stuff... and put a stiffer spring in the forge Bpv....

 

Jim,

I spoke with Archy from IAperformance this week and the told me that the Dyno has been recalibrated to a brand new complete method. Call Steve and he will explain it to you.

I have seen many many dynos runs and I am telling you that your numbers are very strong.
Remember a Evo8MR stock put down 217whp/250tq on that same dyno and a bone stock 04 STI put down 228whp/238tq.

Botton line, I still see your numbers very very strong, for god sake, our Evo 9 made 304whp/304whp with the same mods minus cams and 02 housing.

Honestly Jim, your 318whp is a great number considering your mods. The torque will comes in the name of methanol injection. Send me a PM, there is a local Evo friend selling his 03 bolt on Buschur SMC methanol kit for cheap (around $300). Take the advantage of the methanol and optimize the power/torque on your Evo9 turbo.

As per Steve at IAperformance, he is a very competent guy and has been doing tunning for years, you are in good hand with him.

Carlos

 

if money isn't an issue, get the FULL RACE GT turbo kit FULL RACE is in AZ which is near you

 

FP if you don't have one yet.