GheyrodX - bigger, fatter, gheyer!

[Rmondoh]

Are you still on a stock turbo? Sometimes freer flowing exhaust manifolds actually hurt the spool on turbos. Just a thought.
Yes. He's still on the stock turbo.


I bet if you lean it out to get it to the same AFR you were at before, you'll see some gains.
Yup, that's the plan. He didn't get retuned for that dyno run because we still have an intake manifold and throttle body to put on. We also just wanted to see what the raw gains were. I'm sure once everything is swapped and tuned properly, we'll see some nice gains throughout the power band. :)

[Shane@DBPerformance]

Why would the A/F have changed at all though with such a minor exhaust side change. Was it a lot different?

[Kracka]

Why would the A/F have changed at all though with such a minor exhaust side change. Was it a lot different?
Why the change? I don't know, but my car got quite a bit richer after the o2 elim dp install so for whatever reason higher flowing exhaust path = rich on my car.

November tune vs. ported manifold run (for some reason the dyno database won't show my AFR from the pre-manifold baseline, but at the time we compared it vs. the November tune and it was nearly identical):

http://accessecu.com/dyno/graph.php?gb=0&hp=1&afr=1&rpm=1&sl=1&sln=1&runid1=1349&rgb1=000000255&runid2=1668&rgb2=204000000

[Kracka]

Ported IM/TB install tonight and retune tomorrow!

Armando is coming over after work and we're going to stay at it until the job is done :D

[turbotalon1g]

nice!

[Kracka]

Are you still on a stock turbo? Sometimes freer flowing exhaust manifolds actually hurt the spool on turbos. Just a thought.
Ported stock manifolds did nothing but help spool on the 8/9. My guess is the higher flowing exhaust is playing differently on the X since it has exhaust MIVEC (which only the X has), with minor changes to that I expect to get my spool back.
I bet if you lean it out to get it to the same AFR you were at before, you'll see some gains.
I fully agree. Already just in the back-to-back untuned comparison you can see gains of +9whp in some areas above 5,500 RPM which is a really good sign.

[PlanoEvo]

Ported IM/TB install tonight and retune tomorrow!

Armando is coming over after work and we're going to stay at it until the job is done :D
Might stop by to Chk it out :beer:

[Kracka]

Insanely impressive for a stock head! Already very smooth and wide open, barely even a need for any porting, if anything I'd say it only "needs" a tiny bit of smoothing/cleanup.

http://www.mitsustyle.com/photopost/data/641/medium/photo4.JPG

We got the Mil.Spec IM/TB set along with MAP phenolic gasket installed tonight. Took us about 5 hours start to finish which included a pizza/Throwback Dew break and time to R&R the stock undertray. The manifold itself wasn't really a problem nor were the support brackets...it was all the damn wiring harness clips and the TB coolant line clamps which were at a very precarious angle. The coolant lines to the TB could easily be bypassed with a 180* bent hose to loop to/from the thermostat housing. We decided to skip this for now since we didn't have a hose like that, didn't want to kink a factory line, and were excited to just get the car back together! I had no idea just how much material Aby @ Mil.Spec actually removed from the IM runners until I had it side-by-side with the stocker! I reset the ECU and overall the car seems to be idling just fine; a tad high right after startup but the ECU quickly corrects and brings it down (this may just be because I reset the ECU, I'll find out tomorrow once I actually drive it a bit).

My tune is scheduled for noon tomorrow so later on in the afternoon I'll be reporting back with some final numbers :D

[Rmondoh]

I have a new found HATE for that stupid little vac line clamps. Damn them all to hell!

Aside from that, can't wait to see the results of all our labor over the past few weeks! I'm excited to see the final results!

[scheides]

Nice! Good luck tomorrow, can't wait to see the results!