supporting mods for vf52 - Page 2 - Subaru WRX Forum
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#16 Old 09-22-2012, 09:07 AM
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Go big or go home! IMHO, would rather do 1000cc injectors and do the install once. This would also keep your options open to upgrading to a larger turbo turbo (yes, this will happen eventually...), and E85 if you ever wanted to dabble in it.

- Sandra
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#17 Old 09-22-2012, 10:46 AM
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1000cc (overkill for a vf52) inj will sometimes cause issues if not run at a minimum 80-85% IDC

In other words, you have to have a big enough charger to substantaite the huge inj's

From reading around, not personal use.

Paul
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#18 Old 09-22-2012, 11:03 AM
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It should be the size of the fuel pump that can supply the fuel to the injectors. So, if you only have a 155lph pump (stock for 08'), you won't get full 1000cc but you would still be within a safe range where you are not even coming close to the max IDC. I have read a lot of folks that go with ID 1000's and have had no issues, they even turn out to have better idle. But again I only recommend this high of an injector if the plan is to upgrade to a larger turbo down the line or start pushing E85. If not, then the stock 08 injectors should suffice as synolimit mentioned. The STi "pinks" are rated for 550cc and the 08' WRX is 560cc.

I have posted this link before, but will post it again here - http://www.mysubie.com/faq?id=15

Quote:
What are the OEM fuel pump sizes?
2002-2005 WRX fuel pump 130 lph
2006-2007 WRX fuel pump 145 lph
2008-2009 WRX fuel pump 155 lph
2004-2007 STI fuel pump 145 lph
2008-2009 STI fuel pump 175 lph
The injector size is the same WRX vs. STi for 08-09, but the fuel pump is rated different.

- Sandra
2007 WRX TR | Stage 2 | PAR Gearset (Built by AndrewTech)
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#19 Old 09-22-2012, 04:00 PM
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Quote:
Originally Posted by sugeina View Post
Alright, so i want a 120whp increase. I already have a downpipe and a vf52.
What else is the minimum that i need?
Honestly? Everything!!! That's a tall order! El header, ewg, full 3" tbe, cai, inlet, fmic, tgv deletes, fuel pump, 1000cc injectors because you will have to run e85 to get that much, 3 port, new map sensor because you'll be running down low over 22psi (now you don't have to, you could have a flat curve and not make so much tq if you don't want to, then just let the boost stay level to 16-17psi at redline), a better metal BPV, I'd do new fuel lines with a parallel setup because you'll be around 340-350hp, 1 step colder spark plugs, and unless I'm forgetting something that should be it.

Now if you want to spend less or do less work, Dom 1.5xtr turbo, fuel pump, 750 injectors or 850 for head room on pump gas, better bpv, parallel fuel line, fmic or timc and that's it. You can leave everything else alone since that turbo can blow your motor before you max it out.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#20 Old 09-22-2012, 05:09 PM
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Sandra,

I'm going to explain this in "man terms"

When men go take a leak into a toilet, the stream comes out nice at first (let's say after a night of drinking) for 15-20 seconds.... the last few seconds the stream starts to lessen (and then eventually ends up on the rim of the toilet as dribble).

This is the best way I can explain.... 1000cc injectors on a non E85, E80, E70 etc.... tune will foul up and you will have issues with those injectors. I haven't heard much on the HKS injectors, but the ID's I have.

IDC's need to be up in the 80-90% range to function properly for lifespan.

on a side note, thought the pinks were 565's?

Paul
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#21 Old 09-22-2012, 08:50 PM
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Quote:
Originally Posted by synolimit View Post
Honestly? Everything!!! That's a tall order! El header, ewg, full 3" tbe, cai, inlet, fmic, tgv deletes, fuel pump, 1000cc injectors because you will have to run e85 to get that much, 3 port, new map sensor because you'll be running down low over 22psi (now you don't have to, you could have a flat curve and not make so much tq if you don't want to, then just let the boost stay level to 16-17psi at redline), a better metal BPV, I'd do new fuel lines with a parallel setup because you'll be around 340-350hp, 1 step colder spark plugs, and unless I'm forgetting something that should be it.

Now if you want to spend less or do less work, Dom 1.5xtr turbo, fuel pump, 750 injectors or 850 for head room on pump gas, better bpv, parallel fuel line, fmic or timc and that's it. You can leave everything else alone since that turbo can blow your motor before you max it out.
Haha. Alright. Reason i got here is because when i picked up the vf52 from the shop, a bunch of guys saw me and started giving advice that i could reach 300whp already with just this and that. I dont really have experience prior to this, so i wanted to validate by posting here.

@boostinchick, i dont think ill want to go bigger than a vf52. At least not yet. So maybe the 1000cc Injectors are a bit too muchfor now. What's easily available here (and almost for free) are the stock parts of 2011 sti's so im just wondering if they could fit to an 08 wrx.

@pzr2874, for the tmic, what's the biggest i can fit on an 08wrx? Im hearing processwest around here as the #1 choice...
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#22 Old 09-23-2012, 07:13 AM
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Quote:
Originally Posted by pzr2874 View Post
Sandra,

I'm going to explain this in "man terms"

When men go take a leak into a toilet, the stream comes out nice at first (let's say after a night of drinking) for 15-20 seconds.... the last few seconds the stream starts to lessen (and then eventually ends up on the rim of the toilet as dribble).

This is the best way I can explain.... 1000cc injectors on a non E85, E80, E70 etc.... tune will foul up and you will have issues with those injectors. I haven't heard much on the HKS injectors, but the ID's I have.

IDC's need to be up in the 80-90% range to function properly for lifespan.

on a side note, thought the pinks were 565's?
Haha, Sandra doesn't have a penis!
Pinks are 565

Randy-
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#23 Old 09-24-2012, 12:34 AM
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Quote:
Originally Posted by pzr2874 View Post
Sandra,

I'm going to explain this in "man terms"

When men go take a leak into a toilet, the stream comes out nice at first (let's say after a night of drinking) for 15-20 seconds.... the last few seconds the stream starts to lessen (and then eventually ends up on the rim of the toilet as dribble).

This is the best way I can explain.... 1000cc injectors on a non E85, E80, E70 etc.... tune will foul up and you will have issues with those injectors. I haven't heard much on the HKS injectors, but the ID's I have.

IDC's need to be up in the 80-90% range to function properly for lifespan.

on a side note, thought the pinks were 565's?
This doesn't make sense though because even with stock 565cc at idle and normal driving you're only around 1-8% IDC. I'm looking now, 68mph = 8% = 19% throttle. I could drive these injectors for 200k and they'll never fail. So I'm no where near 80-90% range of functionality yet we know they don't fail. WOT shouldnt decide if an injector lives or dies because that's the only way to get a 565cc up to 80-90% and even then were talking 3rd gear, 5000+ rpm, 80+ mph. I bet there are normal old people that have these cars that have never done that before, I'm sure their injectors have not failed.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#24 Old 09-24-2012, 05:43 AM
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I meant on WOT runs. Just what I've read as I've never had 1000cc injectors b4. To each their own.

Paul
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#25 Old 09-24-2012, 08:21 AM
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Wuld it be good to replace the flywheel to a lightweight one like this for my goals:
ACT StreetLite Flywheel Subaru Models (inc. 2006-2012 WRX) at RallySportDirect.com ?
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#26 Old 09-24-2012, 12:13 PM
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No. Not with stock gears and plate

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#27 Old 09-24-2012, 12:14 PM
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It's not a bad thing. Minimal performance but it will be fine.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#28 Old 09-24-2012, 08:35 PM
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Seriously guys? Can we leave the pen!s comments out? We wonder why more women don't frequent our forums.

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#29 Old 09-25-2012, 05:48 AM
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Originally Posted by synolimit View Post
It's not a bad thing. Minimal performance but it will be fine.
Syno, have you driven a subie with a lightweight FW ?

Especially for a DD, it's a workout and a general pita. I guess if you don't live/work in the city, I suppose it'll be ok....

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#30 Old 09-25-2012, 08:41 AM
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Yea, I agree with pzr2874. Lightweight flywheels chatter like a mofo, and can cause stalling in lower RPM's. As me how I know....NotLikeIStalledInTheMiddleofAFreeWayMaking aLeftorAnything

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