big 16g upgrade question - Subaru WRX Forum
 
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post #1 of 11 Old 08-12-2008, 02:18 PM Thread Starter
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big 16g upgrade question

ok im looking to do the 16g upgrade, my question is what all would i need to use the big 16g as far as ,inj size,the walbro 255?, bigger tmic or fmic?, is that all or is there some other smaller things that are needed. i have ths sti tranny waitin to go in. I have tbe w/ cobb ap. I plan on getting a tune after all this is done. Oh and what do yll think my whp roughly be.


Thx for any help and info.
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post #2 of 11 Old 08-12-2008, 02:23 PM
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exhaust stuff too (up and downpipes), but otherwise you have it down.

04 STi 16G powered lagless fun
04 WRX: SOLD
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post #3 of 11 Old 08-12-2008, 02:42 PM Thread Starter
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yea i have the headers all the way back. thx for the reasurance.
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post #4 of 11 Old 08-12-2008, 03:12 PM Thread Starter
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What size injectors would i be getting the most out of the 16g. Do you think an after market tmic would be a noticeable amount of power differance vs. the sti tmic.
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post #5 of 11 Old 08-12-2008, 03:40 PM
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650cc injectors should be fine. WRX Fuel injector sizing guide STi Fuel injector sizing guide Lgt fuel injector sizing guide, JSC Speed Check this chart out shold re-affirm that for you. I personally would get something bigger than the STI TMIC, but depends on your pockets.

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Cobbtuning.com"
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post #6 of 11 Old 08-12-2008, 03:55 PM Thread Starter
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about 2k . I can get my stock inj moded to bigger cc. Is that reliable, or whatever ive never really heard of anyone sayin to much about doin that with stock inj. so dont know.
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post #7 of 11 Old 08-12-2008, 04:12 PM
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I have modded stock injectors. Works good. Just make sure you get them cleaned, tested, and flow matched.

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post #8 of 11 Old 08-12-2008, 04:36 PM Thread Starter
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oh and what guages would anyone recommend as far as temp, oil press, boost etc... any recommendations.
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post #9 of 11 Old 08-12-2008, 04:39 PM
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Yep, all the previous advice is sound. big 16? eh...probably close to 300whp. It all depends on the tune and other factors. So, don't get to caught up in the number. It should be enough to make you happy. If that's the ballpark your shooting for. Good luck and let us know how it turns out.

Edit: the gauges would help more if your trying to opensource tune it/log it. Unless you like to keep a eye on things. You don't really need any of the above if your taking it to get protuned.
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post #10 of 11 Old 08-12-2008, 05:21 PM Thread Starter
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oh yea duhi didnt eve think about the tune and not needing the guages, but those numbers are good enough. I will be posting over the next 3 months on howmy 16g up grade is going. Thx for all the help guys.
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post #11 of 11 Old 08-13-2008, 03:15 AM
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If you want gauges regardless, from all the reading I have done, prosports are good and some of the cheaper ones out there. Check out prosportgauges.com if you are still interested.

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Cobbtuning.com"
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