Mellon Tuning EVOX build results

Mellon Tuning · Jul 15, 2009, 06:06 PM

Owner: Brad
Username: bbarnhill
Location: Memphis, TN
EVO X
5-speed
93 octane
stock boost
no mods

Brad's EVO X is bone stock down to the paper filter and was surging horribly throughout the RPM range. I was shocked that Mitsu let these cars out the door with a 9.8-9.5 AFR. I only made changes to the fuel/timing thus far and we're very pleased with the improvements over stock

Brad is coming back with a MBC and K&N drop in filter this week...looking forward to seeing what else we can extract from it on pump gas.

for fun we did a g-tech test before and after:

0-60 6.25
1/4 14.57 @ 95.06
60' 2.169
1/8 9.34 @ 75.42

Mellon Tuned fuel/timing only

0-60 4.53
1/4 12.97 @ 108.67
60' 1.89
1/8 8.37 @ 86.52

**Noize** · Jul 16, 2009, 07:40 AM

Per staff vote, DLL graphs are allowed in the dyno forums in Evom. I am going now to change the stickies to reflect this.

Thanks for your patience everyone while we got this all sorted out!

Kevin@MellonTuning · Jul 16, 2009, 07:46 AM

Quote:

Originally Posted by Mellon Tuning

Brad is coming back with a MBC and K&N drop in filter this week...looking forward to seeing what else we can extract from it on pump gas.

Looking forward to this... Today is the day

tephra · Jul 16, 2009, 08:03 AM

Chris - do you have a 3rd or 4th gear pull (inc AFR) for this car?

I presume its totally stock?

I want to check it against my car to make sure the AFR is reading about right..

Mellon Tuning · Jul 16, 2009, 08:10 AM

here ya go bud: 3rd gear 2500-7000, this was with a fresh LC-1 I personally calibrated just before making that log. yes bone stock down to the factory paper air filter.

Code:

tephra · Jul 16, 2009, 08:13 AM

awesome thanks!

is that tail pipe sniffer?

Mellon Tuning · Jul 16, 2009, 08:15 AM

no sir, that's a bung welded into the downpipe so it should be dead on.

what are you seeing with your X?

this car was bucking and surging terribly through the rpm range, it wasn't even fun to drive until I tuned it, hence the massive power/g-tech differences.

tephra · Jul 16, 2009, 08:17 AM

ok cool!

I havn't done a proper pull yet so ill post up tommorow - mine LC1 is in the rear02 location thou (mid cat)

what ROMID was that AFR with? did mitsu lean out the map somewhere between xx15 and xx20?

Mellon Tuning · Jul 16, 2009, 08:20 AM

52680015 2008 USDM car, I guess that's possible, I don't have another X ROM handy to compare.

tephra · Jul 16, 2009, 08:27 AM

I would email you a 17 but i cant find you email address.

I just did a QUICK compare of the fuel maps and they are the SAME

BUT BUT BUT
The "AFR Calibration Map" is different

Code:

	<table name="Calibration Fuel Map" category="Misc" address="576d3" type="3D" swapxy="true" scaling="Percent128">
		<table name="Load" address="617d6" type="X Axis" elements="41" scaling="Load"/>
		<table name="RPM" address="617aa" type="Y Axis" elements="19" scaling="RPM"/>
	</table>

So I think that yes Mitsu leaned out between 17 and 20...

Sorry massively off topic

Mellon Tuning · Jul 16, 2009, 08:29 AM

that's good info though, no problem.

chris@mellontuning.com

tephra · Jul 16, 2009, 08:34 AM

Interestingly my romid 53040010 has the 52680020 AFRCal map AND a leaner fuel map as well..

Mellon Tuning · Jul 16, 2009, 08:36 AM

perhaps they expect better octane in that area.

bboypuertoroc · Jul 16, 2009, 12:14 PM

Jeebus that thing runs rich...

nj1266 · Jul 16, 2009, 12:58 PM

Quote:

Originally Posted by Mellon Tuning

52680015 2008 USDM car, I guess that's possible, I don't have another X ROM handy to compare.

That is one of the first roms on the Evo X in the US. It is has the richest AFRs, hence the ultra rich numbers that you got.

The 52680018 and the 52680020 are the two factory re-flashes that Mitsu released to help with the surging and bucking problem. The 020 was the last one released.