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advice on engine mods
The car is a MY96 WRX, totally standard apart from the backbox. I'm planning on putting a decat downpipe in, but I'm a bit concerned about doing damage to the engine, ie overboost, lean fuel, knocking etc etc etc. What is the best method of monitoring/controlling the engine running, I thought about
the following, Boost Gauge for monitoring boost Manual Boost Controller to adjust boost Lambda Link for lean mixture AFR for adjusting the lean mixture Knocklink for detecting knock Possibly upgrading TMIC Car has 85K miles and running on optimax with no octane booster. Is this a bit OTT or is there a better way to do it, possibly a remap ? Cheers. |
My 96 wrx with runs fine with a full decat. When i say runs fine i mean i have almost no knocklink activity and the afr gauge shows a rich mixture on WOT all the way upto and past 100+mph. I am still running the standard boost and have not had to install and boost controler or the like.
I think you should try without the MBC first. You will prob find the boost will overshoot a little but not enough to hit the fuel cut and all will be fine. Good luck. Andy
Originally Posted by WRX_monkey
The car is a MY96 WRX, totally standard apart from the backbox. I'm planning on putting a decat downpipe in, but I'm a bit concerned about doing damage to the engine, ie overboost, lean fuel, knocking etc etc etc. What is the best method of monitoring/controlling the engine running, I thought about
the following, Boost Gauge for monitoring boost Manual Boost Controller to adjust boost Lambda Link for lean mixture AFR for adjusting the lean mixture Knocklink for detecting knock Possibly upgrading TMIC Car has 85K miles and running on optimax with no octane booster. Is this a bit OTT or is there a better way to do it, possibly a remap ? Cheers. |
That sounds great, so there should be no problems, just change the pipe and go !!!! I just need to get a knocklink and afr to keep a check on things.
Thanks for the info mate, I can't wait to hear the noise with the decat, it sounds great at the moment. Have you got any other plans for yours wrx ? I thought about the IC, but not sure, changing to a later date one seems tricky and a brand new one to replace the slanty one is expensive. By the way what fuel do you run yours on ?? Optimax, octane boost Cheers, Neil
Originally Posted by dj219957
My 96 wrx with runs fine with a full decat. When i say runs fine i mean i have almost no knocklink activity and the afr gauge shows a rich mixture on WOT all the way upto and past 100+mph. I am still running the standard boost and have not had to install and boost controler or the like.
I think you should try without the MBC first. You will prob find the boost will overshoot a little but not enough to hit the fuel cut and all will be fine. Good luck. Andy |
No plans at the mo. Ive spent too much already.
I have a wrx wagon with the following mods Full rebuild by Api td05 z4 ecu full scoobysport decat system with jap style slash cut tail pipe organic clutch lightened flywheel knocklink dawes afr Expect pops bangs and flames if you go for a full decat:) Sounds fkin mint I run on nothing but optimax - no Ob - i get very little det - only the odd green I know what you mean though. I heard reports of overboosting on here when decats are fitted but mine is running perfect with the scoobysport one Andy
Originally Posted by WRX_monkey
That sounds great, so there should be no problems, just change the pipe and go !!!! I just need to get a knocklink and afr to keep a check on things.
Thanks for the info mate, I can't wait to hear the noise with the decat, it sounds great at the moment. Have you got any other plans for yours wrx ? I thought about the IC, but not sure, changing to a later date one seems tricky and a brand new one to replace the slanty one is expensive. By the way what fuel do you run yours on ?? Optimax, octane boost Cheers, Neil |
The scoobysport decat was the one I'm going for too, can't wait for the pops and bangs !!!!! Is yours a full 3" system, I currently have the standard 2.5" centre section, so I would need the 3" to 2.5" decat, maybe I should change the whole system ???
Cheers
Originally Posted by dj219957
No plans at the mo. Ive spent too much already.
I have a wrx wagon with the following mods Full rebuild by Api td05 z4 ecu full scoobysport decat system with jap style slash cut tail pipe organic clutch lightened flywheel knocklink dawes afr Expect pops bangs and flames if you go for a full decat:) Sounds fkin mint I run on nothing but optimax - no Ob - i get very little det - only the odd green I know what you mean though. I heard reports of overboosting on here when decats are fitted but mine is running perfect with the scoobysport one Andy |
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