Gus' EvoIX MR Tuning Story
Yikes! the signal at the tailpipe may give false sense of hope, especially at redline.
Gotta be a little careful. Maybe I'll calibrate the wideband O2 on a dyno prior to testing it out on stock Evo exhaust systems. This means I will have to get a O2 bung welded to the downpipe...
Good thing I got a spare one sitting around!
`Gus
Gotta be a little careful. Maybe I'll calibrate the wideband O2 on a dyno prior to testing it out on stock Evo exhaust systems. This means I will have to get a O2 bung welded to the downpipe...
Good thing I got a spare one sitting around!
`Gus
Sorry I mean to say downpipe wideband going richer. I edited my post above. Sorry about the confusion. haha
Looks like Jeff's Evo's fixed, so time to do some logging this weekend.
Also, looks like I found a (near stock) VIII MR to do a direct comparison against.
~more updates later this week.
`Gus
Also, looks like I found a (near stock) VIII MR to do a direct comparison against.
~more updates later this week.
`Gus
Project Evo Tuning (Let's add a sprinkle of Subaru)
Project Evo Tuning (Let's add a sprinkle of Subaru)
Blog:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dare I say this?
Many have asked, and YES I am bringing Subaru's into the Project Evo Tuning Series! There I said it. I figure why not?
For the longest time Evo's and STI's have been compared in every aspect from the AWD performance to their chick magnet rating, and it is now time for me to compare their OBD-II data!
I realize they're vastly different in engine design, and thus I'm expecting the data collected from these Factory Tuned vehicles to be very revealing about their performance advantages.
Predictions
Following my datalogging traditions, I will be carefully monitoring Airflow, Timing Advance, and Knock Sum.
Become Part of Gus' Tuning Story
If you have $1 for me, I will take it!
The money will go toward purchasing a Wideband O2, Evo Scan, and a Digital Boost Gauge.
<Paypal Donate Button on Blog>
I will think of good ways to reward you when it's all said and done.
~ Look out Subaru's here I come!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Blog:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dare I say this?
Many have asked, and YES I am bringing Subaru's into the Project Evo Tuning Series! There I said it. I figure why not?
For the longest time Evo's and STI's have been compared in every aspect from the AWD performance to their chick magnet rating, and it is now time for me to compare their OBD-II data!
I realize they're vastly different in engine design, and thus I'm expecting the data collected from these Factory Tuned vehicles to be very revealing about their performance advantages.
Predictions
Following my datalogging traditions, I will be carefully monitoring Airflow, Timing Advance, and Knock Sum.
- The 6- Speed Gearbox that came on the STI and the MR are distinctly different . I'm not a transmission expert so I wouldn't know how to interpret it, but I know these ratios will affect the values I will be seeing. Look at how the STI is consistently lower-geared throughout.
- 2.5 versus 2.0 Liter: Displacement difference is going to contribute to the airflow values greatly. Would I see a higher spike in Airflow in the STI, with the MR catching up midway through the RPM?
- Turbocharger Size: Need I say more?
Become Part of Gus' Tuning Story
If you have $1 for me, I will take it!
The money will go toward purchasing a Wideband O2, Evo Scan, and a Digital Boost Gauge.
<Paypal Donate Button on Blog>
I will think of good ways to reward you when it's all said and done.
~ Look out Subaru's here I come!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Last edited by PSG Evo; Nov 30, 2007 at 11:57 AM.
Remeber Sash? He's got a Stock VIII MR. Yeah, we like our cars stock
Sometime last year he and I did a few side-by-side pulls and the cars felt identical. Many VIII MRs I've come across hold 1.4-1.5bar of boost, where as mine might spike a bit but settles at 1.3bar.
It might be worth doing a comparison between yours and a stock VIII MR.
- Char
Gotta do a comparison between Doug's and my car; similar type of mods & tune (except I have stock snorkel intake and he has an open air) his is an MR and mine a GSR... would be interesting to see the comparison...
Also depends on the flow, the type of HFC, and the actual monitoring hardware used.
On our dyno, we had a car with a works HFC, works DP and works catback. It had a wideband in the DP before the cat and I also logged wideband at the tailpipe using an innovate tailpipe adapter.
AFR between the two where pretty darn close from peak torque to about 6500 rpm when the downpipe wideband showed richer by .4 and going richer at fuel cut off.
On our dyno, we had a car with a works HFC, works DP and works catback. It had a wideband in the DP before the cat and I also logged wideband at the tailpipe using an innovate tailpipe adapter.
AFR between the two where pretty darn close from peak torque to about 6500 rpm when the downpipe wideband showed richer by .4 and going richer at fuel cut off.
Yo guy,
I've been slammed with work this week. I'll be posting some good pulls from Jeff's Evo VIII and Henry's BPU Evo IX GSR sometime this weekend.
Preview:
Henry's BPU EvoIX GSR versus Rich's stock EvoIX RS
- We got some insane knock sum counts in the mid powerband. The weather was below freezing, car was running around 21psi, but we had as high as 6 counts of knock! He's got an aggressive tune or some bad gas.
- Airflow comparison: the GSR blew the RS away
- Timing: funny thing is, the GSR (maybe due to timing) has a worse timing advance characteristic than the RS
- Load Value: wow. it was the first time I saw the value spike up above 300
I'll be doing some graph comparisons, and also doing some ROM comparisons as I put the GSR and the RS ROM side by side.
`Gus
Teaser: the GSR's mods
`Gus
I've been slammed with work this week. I'll be posting some good pulls from Jeff's Evo VIII and Henry's BPU Evo IX GSR sometime this weekend.
Preview:
Henry's BPU EvoIX GSR versus Rich's stock EvoIX RS
- We got some insane knock sum counts in the mid powerband. The weather was below freezing, car was running around 21psi, but we had as high as 6 counts of knock! He's got an aggressive tune or some bad gas.
- Airflow comparison: the GSR blew the RS away
- Timing: funny thing is, the GSR (maybe due to timing) has a worse timing advance characteristic than the RS
- Load Value: wow. it was the first time I saw the value spike up above 300
I'll be doing some graph comparisons, and also doing some ROM comparisons as I put the GSR and the RS ROM side by side.
`Gus
Teaser: the GSR's mods
- RALLIART COOLING PLATE
- WORKS DROP IN INTAKE W/ CLEANING KIT
- HALLMAN PRO MBC
- AMS LICP
- 255 WALBRO FUEL PUMP
- GREDDY TI CAT BACK
- WORKS HI FLOW CAT
- WORKS COATED DP
- DYNOFLASH CUSTOM DYNO TUNE
- ROAD/TRACK OHLIN SPEC 700F/900R CUSTOM VALVED COILOVERS
`Gus
Newbie
Joined: Nov 2007
Posts: 73
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From: Virginia
Interesting Thread, I have just purchased my EVO IX with quiet a few bolt on's. Have the HKS bigger intercooler, Custom piping, HKS intake, maual boost set at 19.5psi, DC sports test pipe/cat delete, and EVO ti Exhaust, also boosted the spark and reflashed the ECU, added higher pressure fuel pump That was all done by the previous owner, and the car is definantly running rich under WOT. I certainly want to get this car in somewhere for a tune by someone "in the Know", however I don't know who is well known enough and relatively close by (VA) to do this that I can trust with a 30k car... Any recomendations besides what I can read from your trials and tribulations?