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Old 03-05-2008, 03:03 PM   #1
325boi
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Default what are my options for tune

ok so my tuner told me that my car is unsafe right with the mods that i have on now but its 400 for a tune and dont have that kind of cash right now, my question is can i just get my ecu flash with like a stage 2 map( that will be much cheaper... i think?) and run the car like that untill i have cash to do a dyno or real tune....? thanks
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Old 03-05-2008, 03:48 PM   #2
mickeyd2005
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You should list ALL your mods.
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Old 03-05-2008, 04:09 PM   #3
325boi
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Quote:
Originally Posted by mickeyd2005 View Post
You should list ALL your mods.
perrin intake, perrin DP, bosal exhaust, hks bov(but recirculates ), and soon a walbro fuel pump

tuner said that i can have some big problems if i dont get a tune soon!
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Old 03-05-2008, 04:18 PM   #4
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Why would you buy all that and not save the cash for a tune? Silly.
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Old 03-05-2008, 04:34 PM   #5
mickeyd2005
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Quote:
Originally Posted by 325boi View Post
perrin intake, perrin DP, bosal exhaust, hks bov(but recirculates ), and soon a walbro fuel pump

tuner said that i can have some big problems if i dont get a tune soon!
Don't install the intake. It can cause a LOT of problems if it is not tuned.

Why do you need the fuel pump? I don't see injectors or FPR listed.

My recommendation is to install the DP and bosal exhaust and flash a conservative stage 2 opensource tune. Do some logs to check for overboosting.

Then install the HKS BOV and make sure it isn't causing idle problems or surging problems.

Then when you have money for a tune, install the intake at the tuner's shop.
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Old 03-05-2008, 04:35 PM   #6
325boi
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Quote:
Originally Posted by Cyni View Post
Why would you buy all that and not save the cash for a tune? Silly.
i had it from may last car( 04 sti)
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Old 03-05-2008, 04:39 PM   #7
325boi
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Quote:
Originally Posted by mickeyd2005 View Post
Don't install the intake. It can cause a LOT of problems if it is not tuned.

Why do you need the fuel pump? I don't see injectors or FPR listed.

My recommendation is to install the DP and bosal exhaust and flash a conservative stage 2 opensource tune. Do some logs to check for overboosting.

Then install the HKS BOV and make sure it isn't causing idle problems or surging problems.

Then when you have money for a tune, install the intake at the tuner's shop.
i have the fuel pump at my house just sitting their so might as well install it .... does the intake really **** up the car..? i also have a hks intake will it be the same thing?

any one in socal know were some one can do a opensource tune..?
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Old 03-05-2008, 06:49 PM   #8
06rexwagon
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I have the perrin SRI and it is very very close to stock maf scaling.
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Old 03-06-2008, 01:44 AM   #9
325boi
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Originally Posted by 06rexwagon View Post
I have the perrin SRI and it is very very close to stock maf scaling.
so it has to do with the maf scaling? because the one i have also is very close to stock... so would it be ok to run it still or just take it off..? thanks
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Old 03-06-2008, 01:54 AM   #10
mickeyd2005
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I don't know about the STi, but the Perrin SRI for the LGT is definitely different than stock.

Just to be sure, I would check your AFR Learning A, B, C, and D right now with the stock intake. Then after you put on your Perrin SRI, drive on the freeway at high speed in top gear with constant throttle. Drive around like grandma for two or three days then check AFR Learning A, B, C, and D.

If the Perrin SRI is the same as stock, then those values will be the same.

If they are the same, that's still no guarantee.

Frankly, I would be very surprised if ANY short ram has the same response as stock. In the ones that I have seen, there's usually some funny bump someplace in the scale.
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Old 03-06-2008, 11:58 AM   #11
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Quote:
Originally Posted by 325boi View Post
perrin intake, perrin DP, bosal exhaust, hks bov(but recirculates ), and soon a walbro fuel pump

tuner said that i can have some big problems if i dont get a tune soon!
You need to get it tuned, a stage 2 map will probably not be good for you with your additional mods. You can talk to my tuner writer on my site to get get some more advice(He does remote open source tuning too, so you could ask him about that as well).

Good luck.



---
Giun :: http://subiefreaks.com
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Old 03-06-2008, 04:08 PM   #12
jeff863
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Quote:
Originally Posted by 325boi View Post
any one in socal know were some one can do a opensource tune..?

ev8siv3 from http://www.xpttuning.com/osecuroms/index.php lives out there you should talk to him he does good tuning.
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Old 03-06-2008, 04:12 PM   #13
boosteddx
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hey manny i do open source tuning
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Old 03-15-2008, 08:47 PM   #14
oem
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Default tuning

how would any of those mods make the car unsafe to drive?
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Old 03-16-2008, 01:20 AM   #15
williaty
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They can potentially cause the car to run leaner than intended. That's a good way to kill an engine.
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Old 03-16-2008, 02:28 AM   #16
oem
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Default tune

sorry, but how much of a change in the calculation of the airflow could the intake make. it could not be that far off..5% at most...and why would these changes need a $400 dollar tune. couldn't you just scale the fuel up or down based on the difference of width between the sri and the oem maf. i.e. SRI diameter / 65 mm (OEM diameter) = % to scale overall fuel table. if it is over 100% he would be running lean, if under 100% he would be running rich.
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Old 03-16-2008, 02:35 AM   #17
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Man, you need to edjamakate yourself...

Intakes can require BIG changes. Hell, one spot on mine had to be re-scaled by 22%, and it's stock diameter and no bends! (in other words, most intakes are worse).

If you were to ignore all resonance, turbulence, and centrifugal effects, the change in MAF scaling is still not as simple as the percent change in diameter.

Give it up, it's not that easy. With a MAF system, any intake at the very least needs substantial logging and almost certainly needs a tune to be called safe.
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Old 03-16-2008, 03:15 AM   #18
oem
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Default intakes

pm'ed you (williaty)
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Old 03-16-2008, 03:18 AM   #19
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/me blinks

/me looks at inbox again

no.... you didn't
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Old 03-16-2008, 03:31 AM   #20
williaty
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OK, it finally arrived.

Anyway, to the OP, if you don't want to spend the money to get it protuned, look into opensource tuning. A couple of weeks reading some books, some questions on a tuning forum, and you'd be able to modify an off-the-shelf stage map to run well with your car.

A couple more months of studying and you'll be tuning yourself from scratch!
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Old 03-16-2008, 04:14 PM   #21
Not-EWRX
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Quote:
Originally Posted by jeff863 View Post
ev8siv3 from http://www.xpttuning.com/osecuroms/index.php lives out there you should talk to him he does good tuning.
+1 Best solution to the problem here. He would probably do a road tune for next to nothing if you ask him right.
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