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Old 04-05-2010, 09:05 PM   #1
02wrxroger
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Unhappy 565cc blue injectors and Walbro 255 fuel pump for my 02 WRX

Will i need to get a tune if i replace my stock injectors and fuel pump with the 565 injectors and 255 walbro pump? (before i change the turbo and uppipe) I ask because i have a VF 39 in route and i'll be switching this out soon. I also have a new uppipe that will be going in with the turbo. Will my stock TMIC be able to handle this until i get a STI TMIC?

All i have now is a full catless turbo-back and a CAI. I have had an open source tune (17lb bst) for the parts i have now.

Thanks for any help.
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Old 04-05-2010, 09:14 PM   #2
dgriff992002
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should be I've seen a few guyz run the stock wrx ic with that set-up I do have an Sti TIMIC for sale
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Old 04-05-2010, 09:20 PM   #3
prometheum
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if you're swapping out your injectors you don't need a retune per se, but you definitely need to rescale your injectors. fuel pump doesn't require a retune. yes your stock tmic will be fine, but keep in mind it is holding you back. but if you swap out anything else besides the injectors it is a good idea to get retuned
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Old 04-06-2010, 05:43 AM   #4
bugeyerex02
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huh?

yes. you need a retune. your car will think you are running 440cc injectors. so at any given point, the ECU knows it needs X amount of fuel for Y amount of air. now, add another 125cc's of fuel each time. you will run super, super, bad rich. risking cylinder wash rich.

get a local with a tactrix cable to load you a base map or, just wait till you get your turbo in and do it all at once.
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Old 04-06-2010, 06:12 PM   #5
lotarg
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Do your injectors while the turbo is still out, it will make things a little easier. Also, if you are going to at any point use the Cobb VF39 map, the scaling for the blue injectors will have to be changed because they are not identical to the pinks.
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Old 04-06-2010, 06:21 PM   #6
AMS
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Quote:
Originally Posted by prometheum View Post
if you're swapping out your injectors you don't need a retune per se, but you definitely need to rescale your injectors. fuel pump doesn't require a retune. yes your stock tmic will be fine, but keep in mind it is holding you back. but if you swap out anything else besides the injectors it is a good idea to get retuned
This is correct. You don't need to fully tune the car, but you DO need to have a base map/injector scaling done. This will allow you to drive the car around until you are ready to fully tune it. I would suggest driving the car as lightly as possible until you can tune it!
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Old 04-08-2010, 11:10 PM   #7
subielvr5
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Quote:
Originally Posted by 02wrxroger View Post
Will i need to get a tune if i replace my stock injectors and fuel pump with the 565 injectors and 255 walbro pump? (before i change the turbo and uppipe) I ask because i have a VF 39 in route and i'll be switching this out soon. I also have a new uppipe that will be going in with the turbo. Will my stock TMIC be able to handle this until i get a STI TMIC?

All i have now is a full catless turbo-back and a CAI. I have had an open source tune (17lb bst) for the parts i have now.

Thanks for any help.

I did the VF39 upgrade w/the deutchworks 565's and I was actually able to run the turbo, CSS TMIC, Megan Bell-mouth downpipe, HKS exhaust and injectors w/o my Cobb tune at the time. I was stupid and was eager to drive it before the tune. It did boost stock though obviously, but ran fine.
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Old 04-09-2010, 07:12 AM   #8
Unabomber
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You need to sit on your wallet and sit at the keyboard and start researching. Read the sticky threads at the top of this forum as it's obvious you haven't. We have both a TMIC FAQ here and an Injector FAQ as well as 9000 other posts that will answer your questions. If you are super lazy or want hand-holding, please post in the newbies and FAQ forum.
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Old 04-09-2010, 03:57 PM   #9
jaxscuby
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kaboom..cha-ching
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Old 04-09-2010, 05:33 PM   #10
GrimmSpeed
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Quote:
Originally Posted by prometheum View Post
if you're swapping out your injectors you don't need a retune per se, but you definitely need to rescale your injectors. fuel pump doesn't require a retune. yes your stock tmic will be fine, but keep in mind it is holding you back. but if you swap out anything else besides the injectors it is a good idea to get retuned
I see what you are trying to say and its half true. To simply drive the car and have it run yeah you need to scale them, but ACTUALLY drive the car and really get into it the car NEEDS to be tuned.

Quote:
Originally Posted by bugeyerex02 View Post
huh?

yes. you need a retune. your car will think you are running 440cc injectors. so at any given point, the ECU knows it needs X amount of fuel for Y amount of air. now, add another 125cc's of fuel each time. you will run super, super, bad rich. risking cylinder wash rich.

get a local with a tactrix cable to load you a base map or, just wait till you get your turbo in and do it all at once.
Yes, car will run but not to its full potential

Quote:
Originally Posted by AMS View Post
This is correct. You don't need to fully tune the car, but you DO need to have a base map/injector scaling done. This will allow you to drive the car around until you are ready to fully tune it. I would suggest driving the car as lightly as possible until you can tune it!
YES. But to answer the OP's post you WILL need a tune to properly drive the car

Quote:
Originally Posted by Unabomber View Post
You need to sit on your wallet and sit at the keyboard and start researching. Read the sticky threads at the top of this forum as it's obvious you haven't. We have both a TMIC FAQ here and an Injector FAQ as well as 9000 other posts that will answer your questions. If you are super lazy or want hand-holding, please post in the newbies and FAQ forum.
This is the correct answer, only not so harsh

Will
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