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08-30-2009, 03:57 PM | #1 |
Scooby Specialist
Member#: 127781
Join Date: Oct 2006
Chapter/Region:
E. Canada
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Which to pick: Methanol Injection or Downpipe?
Hi
I have a totally stock STi w/ proper engine management. Now that I saved up some money for ONE engine mod and after some research on the forum, I am looking to either do methanol injection or downpipe. But I can't decide..... From what I gathered so far and these are my thoughts: Methanol injection can cool the intake temp and raise the octane, so in another word, I will be increasing the reliablity of the engine, prevent detonation plus gain a little more power (althought I am doing it mainly for the reliability factor). Also, wont have to upgrade the intercooler later down the road since methanol injection itself provides the necessary cooling. Cons: complication and regular refills Cost: Price of the kit (~450) + installation (~250?) + tuning + Denatured Alcohol I know downpipe is a very popular mod and for a lot of ppl the very first mod to increase power as it provides very noticable gain. Also, there's a big chance that the cats in the stock system would clog under track/ extreme conditions. But it doesn't do it while increasing reliablity like methanol injection. Cost: Price of catted downpipe (~500) + installation (~90) + tuning So what should I do? PLease advice!!!
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08-30-2009, 04:03 PM | #2 |
Scooby Newbie
Member#: 54592
Join Date: Feb 2004
Chapter/Region:
SCIC
Location: pittsburgh
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I would get a catless downpipe from ebay. I think they're like $100.
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08-30-2009, 04:06 PM | #3 |
Scooby Guru
Member#: 151928
Join Date: Jun 2007
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:09 Triumph S3 |
get the dp first. meth should be farther down your priority list right now if your car is completely stock.
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08-30-2009, 05:51 PM | #4 |
Scooby Newbie
Member#: 114072
Join Date: May 2006
Chapter/Region:
South East
Location: Melbourne Florida
Vehicle:2003 Impreza Wrx Midnight Blue |
downpipe first, no need for methanol yet since you really are not running high enough temps to warrant its use. When people go for meth its usually after a bigger turbo install. Go downpipe because it is one of the supporting mods for the future of maybe even more power
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08-30-2009, 06:04 PM | #5 |
Scooby Specialist
Member#: 206853
Join Date: Mar 2009
Chapter/Region:
RMIC
Vehicle:2004 WRX Wagon TXS Stage 4 |
I'd recommend the downpipe. You don't need to worry about engine reliability right now on a stock setup. With the downpipe in place, you are building the foundation for a faster, more powerful car. You can't / shouldn't do much down the road without it. Also, I don't recommend an ebay downpipe. You absolutely get what you pay for . . . shell out the money for a quality DP. Make sure you do your research on volume levels, tone, efficiency, looks, etc.
Meth. injection is great, but isn't needed right now. When you get into more powerful mods (for which you'll need a DP!) then you can consider it, I say. |
08-30-2009, 06:10 PM | #6 |
Scooby Specialist
Member#: 137569
Join Date: Jan 2007
Chapter/Region:
AKIC
Location: East SIDE! of anchorage
Vehicle:WRX Twinscroll Dez in yo mouth! |
the downpipe will bring the best out of the meth... =) along with a full tbe and other tid bits. keep kickin your almost there pat'na.
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08-30-2009, 06:14 PM | #7 | |
Scooby Specialist
Member#: 84758
Join Date: Apr 2005
Chapter/Region:
MAIC
Location: Dover DE
Vehicle:'04 WRB WRX |
Quote:
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08-30-2009, 09:12 PM | #8 | |
Scooby Newbie
Member#: 54592
Join Date: Feb 2004
Chapter/Region:
SCIC
Location: pittsburgh
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Quote:
I wouldn't say water/meth is useless on a stock turbo. I have no personal experience with it but it would lower temps so you could run leaner. A down pipe gives nice proven gains though. Last edited by dankster; 08-30-2009 at 10:00 PM. |
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08-30-2009, 11:09 PM | #9 |
Scooby Guru
Member#: 48199
Join Date: Nov 2003
Location: Maryland
Vehicle:06 WRX WRB |
Downpipe first. The stock cats wont let heat out fast enough to do any decent tuning. You can just get so much more out of any other mod with a downpipe...
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08-30-2009, 11:55 PM | #10 |
Scooby Specialist
Member#: 17079
Join Date: Apr 2002
Chapter/Region:
MAIC
Location: Alexandria, VA
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Better get quotes on the meth install. I've heard a lot more than $250 depending on the kit. If meth injection fails your engine may/will blow.
I'd stick with a downpipe. |
08-30-2009, 11:56 PM | #11 |
Scooby Specialist
Member#: 96448
Join Date: Sep 2005
Chapter/Region:
Tri-State
Location: NY
Vehicle:02 WRX VF34 |
yes, get the DP first and good tune.
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08-31-2009, 12:30 AM | #12 |
Scooby Specialist
Member#: 189525
Join Date: Sep 2008
Chapter/Region:
NWIC
Location: Portland Oregon
Vehicle:2007 WRX Wagon Invisible Plain |
Same. DP and most importantly a good tune. There aren't any power modifications you can do that will net as much if the engine is choking for air, or fighting to get the exhaust out. Gotta let it breathe, that is key.
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