Why are my IDC's so low?

TurboQueef · 07-24-2006, 03:57 PM

I am finding lots of strange things these days..

I am pulling my hair out because I see that everyone is running 100+ IDC's but I just coast around at 88 or so.. even with 11/1 AFR and lots of boost.

Anyone mind taking a look at today's data log and giving me your opinion.

Thanks

crystal_Imprezav · 07-24-2006, 04:14 PM

If you log boost, MAF, and MAF volts, I could give you a better analysis.

TurboQueef · 07-24-2006, 04:20 PM

Quote:

Originally Posted by crystal_Imprezav

If you log boost, MAF, and MAF volts, I could give you a better analysis.

maybe tomorrow...

What kind of IDC's u see?

I am trying to figure out if my wide band has taken a poo poo...

crystal_Imprezav · 07-24-2006, 04:23 PM

I am seeing mid to high 90's. I doubt your wideband is going bad b/c I was using close to your fuel table during my tune and it resulted in almost identical AFR's. It may have to do with your elevation being higher up results in less IDC's.

WolfPlayer · 07-25-2006, 05:10 AM

Turbo,

What is the outside temperature? I was hitting 105% as the car rotated toward 7000rpms with a 10.8:1 AFR (IIRC). This was with the outside temperature around 30-40d. At 95d it would definitely be lower. With 11.x:1 it would be lower too.

t

Nixlimited · 07-25-2006, 01:03 PM

Mine are in the 60s at 20 psi and 7000 rpm.

overdose · 07-25-2006, 02:17 PM

Quote:

Originally Posted by crystal_Imprezav

I am seeing mid to high 90's. I doubt your wideband is going bad b/c I was using close to your fuel table during my tune and it resulted in almost identical AFR's. It may have to do with your elevation being higher up results in less IDC's.

we're at sea level

WolfPlayer · 07-25-2006, 03:02 PM

Quote:

Originally Posted by Nixlimited

Mine are in the 60s at 20 psi and 7000 rpm.

Ummm, of course they are - you have 850s. We're talking about stock injectors (and I think you knew that so what was your point

)?.

t

TurboQueef · 07-25-2006, 03:30 PM

Quote:

Originally Posted by WolfPlayer

Turbo,

What is the outside temperature? I was hitting 105% as the car rotated toward 7000rpms with a 10.8:1 AFR (IIRC). This was with the outside temperature around 30-40d. At 95d it would definitely be lower. With 11.x:1 it would be lower too.

t

With temp's in the high 80's low 90's I hit 84% or so at high RPM and 11.2 AFR. I just checked a log from 49 d F and I got up to 92% but that is it.

????????????

WolfPlayer · 07-26-2006, 04:47 AM

Yea, sounds like you still might be down about 10% IDC or so. What is your altitude?

t

Nixlimited · 07-26-2006, 09:45 AM

Quote:

Originally Posted by WolfPlayer

Ummm, of course they are - you have 850s. We're talking about stock injectors (and I think you knew that so what was your point

)?.

t

D'oh, didn't know that. I was, however, very surprised to see how low mine are. At 28 psi I am definitely using a lot more of the headroom though!

I really wish I could run dual injectors, that way I could have the low load smoothness of a small injector matched with the high load/boost flow capacity of both working together.

TurboQueef · 07-26-2006, 03:30 PM

Quote:

Originally Posted by WolfPlayer

Yea, sounds like you still might be down about 10% IDC or so. What is your altitude?

t

600' above

TurboQueef · 07-26-2006, 03:31 PM

Quote:

Originally Posted by Nixlimited

D'oh, didn't know that. I was, however, very surprised to see how low mine are. At 28 psi I am definitely using a lot more of the headroom though!

I really wish I could run dual injectors, that way I could have the low load smoothness of a small injector matched with the high load/boost flow capacity of both working together.

Nick... with that HP what times & MPH u run in the 1/4 mile?

Nixlimited · 07-26-2006, 05:22 PM

Quote:

Originally Posted by TurboQueef

Nick... with that HP what times & MPH u run in the 1/4 mile?

Haven't got a chance to run yet since there is no 1/4 in San Diego and since my clutch won't hold at full boost. Actually, as of yesterday, my clutch won't hold on low boost. When I get back to TX and have the clutch replaced I will make some runs.

WolfPlayer · 07-27-2006, 05:10 AM

Quote:

Originally Posted by Nixlimited

D'oh, didn't know that. I was, however, very surprised to see how low mine are. At 28 psi I am definitely using a lot more of the headroom though!

I really wish I could run dual injectors, that way I could have the low load smoothness of a small injector matched with the high load/boost flow capacity of both working together.

Are you running meth injection?

t

07-24-2006, 04:14 PM	#2
crystal_Imprezav Spec C Club Car: Slow 05 STi Fav Mod: Loping Idle Location: Chewy's Garage Posts: 1,863 Join Date: Mar 2005 Trader Rating: (11)	If you log boost, MAF, and MAF volts, I could give you a better analysis.

07-24-2006, 04:23 PM	#4
crystal_Imprezav Spec C Club Car: Slow 05 STi Fav Mod: Loping Idle Location: Chewy's Garage Posts: 1,863 Join Date: Mar 2005 Trader Rating: (11)	I am seeing mid to high 90's. I doubt your wideband is going bad b/c I was using close to your fuel table during my tune and it resulted in almost identical AFR's. It may have to do with your elevation being higher up results in less IDC's.

07-25-2006, 05:10 AM	#5
WolfPlayer Moderator & ECU Tech Car: 05 CGM STI Fav Mod: mo boostaz Location: Fredneck, MD Posts: 3,643 Join Date: Jun 2004 Trader Rating: (6)	Turbo, What is the outside temperature? I was hitting 105% as the car rotated toward 7000rpms with a 10.8:1 AFR (IIRC). This was with the outside temperature around 30-40d. At 95d it would definitely be lower. With 11.x:1 it would be lower too. t

07-25-2006, 01:03 PM	#6
Nixlimited Professional STI Racer Car: 05 STi CGM Fav Mod: Tuning... Location: San Diego Posts: 811 Join Date: Feb 2005 Trader Rating: (0)	Mine are in the 60s at 20 psi and 7000 rpm.

07-26-2006, 04:47 AM	#10
WolfPlayer Moderator & ECU Tech Car: 05 CGM STI Fav Mod: mo boostaz Location: Fredneck, MD Posts: 3,643 Join Date: Jun 2004 Trader Rating: (6)	Yea, sounds like you still might be down about 10% IDC or so. What is your altitude? t