boost question

Post by **implict** » Tue Jun 17, 2003 3:57 am

Ive got the mines ecu... and was woundering how much boost im gettn from it.

They dunno the specs but i found this so far.

BOOST: 0.9kg/cm2

How much is that?

Post by **Tai Mai Shu** » Tue Jun 17, 2003 3:57 am

boost is measured in Bar, Vacuum is mesured in KG/cm2

Post by **implict** » Tue Jun 17, 2003 3:57 am

well thats what i got from this site...

Post by **implict** » Tue Jun 17, 2003 3:57 am

you guys dont think that the mines ecu would mess with the boost would you???

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

Im not sure if the ECU could directly change the boost. Boost is changed by fluctuations in the vacuum hoses or the wastegate. The ECU has no control over either of those when you do an SR swap .

BTW, 0.9kg/cm²= 12.8 PSI

Post by **implict** » Tue Jun 17, 2003 3:57 am

Well if it doesnt change the boost... then why is this guy sayn it does?

http://cgi.ebay.com/ebaymotors...33597

so am i runnin at 12.8??? or the reg 7.....

just wanna know.

Post by **implict** » Tue Jun 17, 2003 3:57 am

i dont have a boost conroller or boost gauge...

Post by **Tai Mai Shu** » Tue Jun 17, 2003 3:57 am

boost gauge is 30 bucks, be a baller and buy one that way you can be sure. Without my greddy profec B connected my wategate wasnt opening till about 11psi, but it didnt matter i run 1 bar daily. Of couse I dont use it all, most the time.

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

They seller is not saying it will increase the boost to 13 psi, he is saying the previous owner used it while he also had boost set at 13psi using some other device.

The only things that ECU features are: No speed limiter and no boost cut, and the ECU is "tuned" to respond to the basic bolt ons better (probably with a remapped fuel curve).

Post by **implict** » Tue Jun 17, 2003 3:57 am

so u think im still at 7 psi???

Post by **implict** » Tue Jun 17, 2003 3:57 am

im just asking all these question cause the only thing i have done to car is that ecu..... and yesterday i was out at night on the interstate just crusing around and a integy came next to me and reved... so he droped his in 3rd and so did i..... i pulled really hard and killed him so bad... so he told me to get off the next exit and i did.... and asked me what i have done.. told him what i had and he didnt belive me so i poped the hood... his eyes got real big.. i gues he knew what he was lookn at.... but he was a gsr spraying a 75 shot...he told me he sprayed... he caught up to me though... i guess thats when he hit it... he was at my back bumper.

Long story short... if im at 7psi still... then dayymm.... im one happy mofo

I have the video, and will try to upload it somehow.

Thanks jeff.

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

Yes. The ECU probably has a tuned fuel curve that has been crafted to make more efficient power if you run 13 psi on the stock turbo. Thats probably what it means.

Post by **BuudWeizErr** » Tue Jun 17, 2003 3:57 am

Post by **implict** » Tue Jun 17, 2003 3:57 am

so im still at 7??? right?

Post by **implict** » Tue Jun 17, 2003 3:57 am

Bud on ur site u said

"The other problem is during high RPM's, the rocker arms can come lose, and if that happens, all hell can break lose under that valve cover."

Thats only when you rev in high rpms right???? or is it at high rpms period?

Post by **B.L** » Tue Jun 17, 2003 3:57 am

0.9kg/cm2 = 0,9bar =13psi

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

To be more accurate:0.9 Kg/cm² = 0.8825985 bar = 12.80101 PSI

Bar and kg/cm² are not the same.

Post by **B.L** » Tue Jun 17, 2003 3:57 am

i know but the difference is so small...

Post by **implict** » Tue Jun 17, 2003 3:57 am

so the ecu didnt change how much boost im pushn?

( just wanna make sure im at 7 still )

Post by **SWIFT_DRIFT** » Tue Jun 17, 2003 3:57 am

BUY A BOOST GAUGE AND FIND OUT! SPEEDRACER ALREADY TOLD YOU THE ECU WILL NOT CHANGE THE BOOST.

Post by **implict** » Tue Jun 17, 2003 3:57 am

damn dont gotta get all gay about it.

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

Well you did just ask if you were at 7 psi 4 or 5 times. Everytime the response was yes, there was no "actually your running *PSI" so its understandable that Swift might get a little upset.

Post by **SWIFT_DRIFT** » Tue Jun 17, 2003 3:57 am

well people are telling you answers and you keep asking over and over AM I STILL AT 7>?!?! OMFG OMFOGMOMFOMG AM I STILL AT 7?

Post by **Gregariousgreg** » Tue Jun 17, 2003 3:57 am

If you're running at 13 psi instead of 7 then congradulations, you have a magical ECU :P

Post by **bob marley** » Tue Jun 17, 2003 3:57 am

Correct me if I'm wrong (still learning) but I don't think an ECU can raise the boost. All the ecu does is send a signal (or in this case it doesn't) which limits the amount of psi/bar the turbo puts out. This is why you need a boost controller.

Right?

Is this mines eco worth it? Anyone else have it on their car and care to share some info?

Johann

Post by **Gregariousgreg** » Tue Jun 17, 2003 3:57 am

I think the biggest reason most people like to get ECUs for 240's is it takes out the rev limiter and the speed limiter so you don't top out right at 115 mph like you do if you have the stock ECU.

Post by **SpeedRacer1** » Tue Jun 17, 2003 3:57 am

You stop at 125-130 on the stock SR ECU

Post by **BuudWeizErr** » Tue Jun 17, 2003 3:57 am

bob marley wrote:Correct me if I'm wrong (still learning) but I don't think an ECU can raise the boost. All the ecu does is send a signal (or in this case it doesn't) which limits the amount of psi/bar the turbo puts out. This is why you need a boost controller.

Ugh, no. The ECU doesn't control boost at all. In fact, I doubt that the ECU even knows how much boost is being thrown at the engine. The ONLY thing the SR ECU does is feed fuel to match the signal coming from the AFM, and then spark.. A boost controller doesn't hook up to the ECU at all (unless it's some gay piggyback crap like the AFC).

If the ECU could control boost, in any way, it would require for an electrical wastegate. And I don't even think those exist. We have mechanical wastegates. They require a certain pressure to open. Which, in this case, is 0.5BAR.

boost question

boost question

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