Redlining with a Redline

Gotian · 06-23-2006, 10:24 AM

It's 2 AM and I'm onmy way home. As I'm driving i see a nice Ion redline. Well since I almost got one of those I decided to race one. So I match the cars speed and inch forward and back to get the redline to race. The redline downshifts and it's on. I drop to 3rd and take of with the redline. It had about 1/2 a car length on me until my boost began to climb. It went to 20 till I got to my redline where it went to 15. By that time I already had 4 cars on it. I shifted to 4th where my boost climbed to 22psi I got pushed back into my seat, I shut down cause I freaked out a bit. When I got to my house I was breathing a bit heavy and laughing at the same time.

What happened was that Lately I have been messing with my boost, and before I had this run in with the redline i turned down my boost and found out the reason I'm boosting more now is because I had the boost turned up too much it was sending me into a soft limp mode and restricting my boost. So apparently to boost better I needed to turn it down a bit.

rice(er) · 06-23-2006, 02:39 PM

2 am?

nice race, dont think i've seen a redline in real life before, hows the weather in miami, do you guys deal a lot with hurricanes?

Gotian · 06-23-2006, 02:45 PM

too many hurricanes

Musashi3000GT · 06-23-2006, 02:56 PM

Your boosting 22psi now?

didnt we say to keep it under 20?
dude Jorge might be right about you turning that thing into a flame thrower.

be carefull you punk!

Gotian · 06-23-2006, 03:13 PM

Quote:

Originally Posted by Musashi3000GT

Your boosting 22psi now?

didnt we say to keep it under 20?
dude Jorge might be right about you turning that thing into a flame thrower.

be carefull you punk!

did I not say I turned it down before I had this race? apparently when I had it before the computer was restricting me and i didn't know, and when I lowered the boost it put it back into healthy parameters and so that's why it went to 22 easily with no hesitation. Before it did seem like my top end was suffering a bit but now it doesn't and it doesnt stay at 22 it spiked there and slowly went down, but after the 22 spike I shut it down cause the force that came from my car suprised me.

TatII · 06-24-2006, 12:32 AM

nice race, but i seriously doubt that turbo can hold 22 psi at redline. what boost does it end up at when your redlining?

Gotian · 06-24-2006, 12:40 AM

Quote:

Originally Posted by TatII

nice race, but i seriously doubt that turbo can hold 22 psi at redline. what boost does it end up at when your redlining?

never said it holds up to 22 when redlining, at redline it holds 14.5

TatII · 06-24-2006, 01:08 AM

wow that is quit a bit of drop off. but non the less your 1.8T is very very impressive for the little stuff that was done to it.

cmk · 06-24-2006, 01:38 AM

Quote:

Originally Posted by TatII

wow that is quit a bit of drop off. but non the less your 1.8T is very very impressive for the little stuff that was done to it.

Zeiss · 06-24-2006, 02:47 AM

is it still running stock turbo?

Gotian · 06-24-2006, 03:54 AM

yes stock turbo and what i hold throughout most of my power band is 16-17

RJG · 06-29-2006, 02:56 PM

The soft limp is probably because of detonation. Which is not surprising at all considering YOU ARE RUNNING 22 PSI. I'm just waiting for you to post that you grenaded your engine. I really doubt setting the boost that high will net you an HP because the turbo is just going to be blowing hot air. You need to do a back to back comparison on a dyno or at least at a 1/4 mile drag strip.

RJG · 06-29-2006, 04:11 PM

I've been reading up on Jetta's a little bit and it looks like a lot of people set boost to 17 PSI on stock turbo, so maybe you won't blow anything up at 20. Not for a while at least. That's something I never really understood, how the STI's turbo just pushes hot air above 17.5 PSI, no real benefit in setting boost higher. But SRTs and now Jettas can run 20 PSI on a smaller turbo? Maybe it's because the STI has a 2.5L engine, and you need to flow more air to get the same PSI. SRTs have a 2.3L so it's not that much smaller though...

Do you have a MBC though? If you trick your car into not limping with the diode, it will just spin the turbo as fast as possible unless you limit the boost with a controller somehow. If you don't have a MBC your turbo isn't going to last very long.

CassiesMan · 06-29-2006, 05:10 PM

Quote:

Originally Posted by RJG

how the STI's turbo just pushes hot air above 17.5 PSI, no real benefit in setting boost higher

Dons suit in preperation of flames...

Japenese vs. German engineering.

-The Stig- · 06-29-2006, 05:42 PM

I can see this might get ugly, so in preperation of it... lets keep it civil.

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