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Dec 1, 2008, 07:54 PM
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#1
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Evolved Member
Personal Sales Rating: ( 11)
Join Date: Jul 2006
Location: Augusta, GA
Posts: 770
Drives: 2006 Evo IX GSR/SSL
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two mods = lean afr
I added a o2 dump and a perrin intake and I think my afr has leaned out to damn near 11.8-12.0
I was running low 11's high 10's.
I've been staying out of the gas.. I noticed this pretty much right after the intake install. Didn't notice to much afr change with the dump.
I turned boost down, but still kind of lean to me. I'm kind of scared to even log a pull.
Can this perrin intake make that much difference in afr? Previously I had stock intake maf pipe with apexi filter.
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Dec 1, 2008, 08:00 PM
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#2
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Evolving Member
Personal Sales Rating: ( 7)
Join Date: Nov 2008
Location: Madison
Posts: 126
Drives: 2004 mitsubishi evolution RS
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this kind of scares me, because i used to run the same set up as you except hks filter, and i just put on the hks pipe and havent had a wideband hooked up since then, and when i started taking my car apart when i put it in the garage, i kind of thought i had white smoke coming out of the exhaust, but i talked myself into it being fog from the cold
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Quote:
Originally Posted by Rin Tin Tin
WTH? Serious? At age 15, i had problems handling my penor. I wouldn't have ever been able to handle the raw power of an Evo. I would always try to be hiding it when walking around: putting books in front, walking sideways, trying to draw attention away from my crotch. And when they do see it, they look at me and say, "What the hell, Tin?" and I would respond, "I don't know man! It has a mind of its own.".
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Dec 19, 2008, 04:45 PM
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#3
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Newbie
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Join Date: Nov 2007
Location: Torriongton CT
Posts: 99
Drives: 91 Eclipse, 92 talon, 91gvr4, 05 evo
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the intake will make a big difference. Put the stock one. Or get the flashed.
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Dec 23, 2008, 01:51 PM
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#4
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Location: Trinidad
Posts: 28
Drives: Evo Vi Rs2
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11.8 -12.0 sounds great just adjust timing to suit and you should be good to go. This is the ratio we usually tune for
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Dec 23, 2008, 03:27 PM
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#5
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Location: long island
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Drives: Drag Evo 8, DG built Evo X, 05 Cadillac Escalade, 07 Ninja zx6r
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Quote:
Originally Posted by saltydog
11.8 -12.0 sounds great just adjust timing to suit and you should be good to go. This is the ratio we usually tune for
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I do not think so. Especially if he/she can not tune the car. Is this on 93 Octane? On C-16 this would be fine with the proper tuning, but i would never recommend that kind of a/f to anyone running pump gas alone. You might as well tell him to drain the oil out of the car and floor it.
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Dec 23, 2008, 03:31 PM
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#6
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Drives: Drag Evo 8, DG built Evo X, 05 Cadillac Escalade, 07 Ninja zx6r
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Quote:
Originally Posted by FastAzzEvo
I added a o2 dump and a perrin intake and I think my afr has leaned out to damn near 11.8-12.0
I was running low 11's high 10's.
I've been staying out of the gas.. I noticed this pretty much right after the intake install. Didn't notice to much afr change with the dump.
I turned boost down, but still kind of lean to me. I'm kind of scared to even log a pull.
Can this perrin intake make that much difference in afr? Previously I had stock intake maf pipe with apexi filter.
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Get the tune fixed up...A little fuel/timing here and there and you are good to go. Do not listen to anyone. That is a lean air fuel for pump gas, anyone will tell you that.
PM me and i will get you where you need to be.
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DG Motors
In-house DYNO DYNAMICS
Tuning specials for evo 8's 9's and X's
Ecuflash Specialists/Aem Certified Tuners
WWW.DGMotorsNY.COM
1-631-957-8464 -Ask for Pete
Internet Flash Packages!
Tuner Of Worlds Highest Whp "Stock Ecu"Stock Block Evo X 629whp!
Tuner Of Worlds Highest Whp Evo X On 93 Octane 629whp!
DG Drag Evo 8: 9.06 @ 164mph!
DG Drag Evo 8 In Action: http://www.youtube.com/watch?v=ASZIiklA0Ow
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Dec 23, 2008, 04:12 PM
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#7
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Evolving Member
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Location: NORTH CAROLINA
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Drives: E-85
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The filter made it leaner! The 02 dump does not change a/f. But evo8604 is right you need to get a tune!!
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Dec 23, 2008, 05:57 PM
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#8
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Drives: RX7 GSL-SE turbo, 05 MR Graphite Gray,02 GSXR-750, 88 supra turbo
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What are your boost levels??
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Jan 3, 2009, 05:41 PM
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#9
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Drives: GG 8
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since stock is so rich, it wont matter with the intake no?
you still need tune
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338whp 350lb.ft. @ 23psi
new setup RED installed awaiting parts for tune, #'s 2 come soon
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Jan 4, 2009, 01:26 AM
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#10
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Drives: couier ute evo x RS x3 2 x evo 8 rs
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Quote:
Originally Posted by FastAzzEvo
I added a o2 dump and a perrin intake and I think my afr has leaned out to damn near 11.8-12.0
I was running low 11's high 10's.
I've been staying out of the gas.. I noticed this pretty much right after the intake install. Didn't notice to much afr change with the dump.
I turned boost down, but still kind of lean to me. I'm kind of scared to even log a pull.
Can this perrin intake make that much difference in afr? Previously I had stock intake maf pipe with apexi filter.
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they will cop 12.5 afr @ 1.5 bar of boost all day long so long as they don't detonate . cheers from oz
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evo x rs 4.5 hr's to do engine swap getting quicker
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Jan 9, 2009, 05:30 PM
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#11
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Drives: '03 Evo 8, '04 WRX, 89 Honda Civic
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I've run that lean before but I also tuned all the knock completely out of the map via timing. I honestly wouldn't recommend it for a daily driven car though, as variables from things like air temperature or even the quality of gas at the pump can take something that's on the edge of safe to very dangerous in a matter of seconds. Richer is safer, and while you're at it you might consider adjusting your throttle crossover points too, as factory settings seem to keep things lean at the crossover point up until a certain throttle percentage regardless of boost pressure.
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10+ years of tuning and boost drove me to drink
EcuFlash tuned by me @ 28psi with Speed Density conversion, no spike w/open dump mod on 93oct and no knock with all the bolt-on's...Holset/top mount/2.3 coming soon...
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Jan 14, 2009, 09:01 PM
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#12
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Drives: 03 evo 8/ 06 R6
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what gear are you getting those afrs? If its 3rd then you are still safe on 93 at your elevation. 4th will richen up to just about 11.3. I have had mine on 91 pump piss @ 12.0 in 3rd and 22psi with no problems. If you are still uncertain use wideband and get 3rd gear afrs to 11.6-11.5 4th will rechen up to just about 11.1-10.9. Now this is what I have seen on my car and many others.
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Jan 15, 2009, 03:19 PM
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#13
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Location: US of A
Posts: 525
Drives: an evo, duh...
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tune...
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Jul 7, 2009, 08:54 AM
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#14
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Location: Temecula, CA
Posts: 930
Drives: 2003 RR Evo
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I'd be happy it leaned out, that means your mods actually made the motor flow more air. Just get a re-tune and you should net some power.
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