IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: Be4u on February 22 2007, 05:20:38 PM

Title: Knock questions
Post by: Be4u on February 22 2007, 05:20:38 PM: My chip is for 93 oct 20*/18* 15-17 psi. No alky. (not hooked up)

Fuel pressure is 44#

At 3/4 throttle I get 1 degree of knock and it slowly goes up. I gotta lift.

What do you think my problem is? Intercooler is a 15 row stretch stock location.

Wideband at cruise & idle is 14.00 - 15.00. Shouldnt it be lower with Erics chip?

Stock maf too.
Title: Re: Knock questions
Post by: Recklessrob on February 22 2007, 06:40:07 PM: Your WB is near Stoichiometric ratio (14.7 : 1) Generally
most cars idle better when they're a little richer than that.
What does it read @ 3/4 throttle and higher when the knock is occuring ?
Title: Knock questions
Post by: Be4u on February 22 2007, 06:59:27 PM: I believe the car idles at 14.7.

I'm going to email Eric and see what he says about idling lower. I swear it should be high 12...I'm probably wrong though.

I'll have to get back to you on the reading at 3/4 throttle. I was too worried about watching to see if the knock goes up to even think about anyhting else. Might take me a week to let you know. lol
Title: Re: Knock questions
Post by: kma697 on February 22 2007, 07:21:48 PM: Stoichiometric ratio??? Damn those big words scare me off...I better get a dik-shun-ary!! That is how you spell it right??? :rofl; I didn't realize we had so many scholars here...I'm impressed.
Title: Re: Knock questions
Post by: Recklessrob on February 22 2007, 07:30:54 PM: You're no slouch either. :supz:
Title: Re: Knock questions
Post by: Ttype83 on February 23 2007, 12:07:30 PM: When was the last time you did a spring cleaning?
Check turbo to IC hose for oil.
You need a logging program to record it while it's happening.
Title: Knock questions
Post by: Be4u on February 23 2007, 01:21:38 PM: Bout 7K miles ago.

I'll check the hose today.

I need to find a direct scan pretty soon. The weathers getting warmer and I'm starting to get the itch.
Title: Re: Knock questions
Post by: Ttype83 on February 23 2007, 03:29:16 PM: If you are going DS, I would look at the new powerlogger instead.
I was thinking of the free ones :D cheap laptop and cable...
Title: Knock questions
Post by: Be4u on February 23 2007, 06:29:16 PM: Jim, tell me more!
Title: Re: Knock questions
Post by: Ttype83 on February 23 2007, 06:43:49 PM: The cheapie: http://www.turbobuicks.com/forums/showthread.php?t=55201
The power logger: http://www.fullthrottlespeed.com/itemdesc~ic~050PWRLOG.htm
You can read more about it here: http://www.turbobuicks.com/forums/showthread.php?t=56346&highlight=power+logger
Title: Knock questions
Post by: 87natty on February 23 2007, 07:32:33 PM: I second Jimbo.
Title: Re: Knock questions
Post by: Wrecked Em on February 23 2007, 09:36:05 PM: What injectors are you running?

I would drop the fuel pressure and see how it responds.

You need some type of scan tool! :smt071
Title: Re: Knock questions
Post by: Recklessrob on February 24 2007, 02:08:35 AM: Quote from: "Wrecked Em @ Fri Feb 23, 2007 9:36 pm"
What injectors are you running?

I would drop the fuel pressure and see how it responds.

You need some type of scan tool! :smt071

Don't drop the pressure yet, you may be too lean. Get some data man.
Title: Knock questions
Post by: Be4u on February 24 2007, 04:51:31 AM: Ok, sooner than I expected I tested the 3/4 throttle wb reading.

With 60# injectors the wb hit 12.xx - 11.xx with about 3* of knock at about 65 mph. See my sig for engine details. The boost was probably at aroung 12-14#'s.

I have a scanmaster and WB.

Jim, I never checked my IC to turbo hose. Busy all day. I'm about to check your links. Thanks!
Title: Knock questions
Post by: Top Speed on February 24 2007, 09:01:16 AM: I would start a bit richer like around 11.5-11.7:1.

It should not knock with that timing at that boost, but every car is different.
Title: Knock questions
Post by: Be4u on February 24 2007, 01:31:14 PM: Turn up my FP more? It's at 44#'s line off.
Title: Knock questions
Post by: Top Speed on February 24 2007, 01:56:50 PM: No, add more fueling in the chip.
Title: Knock questions
Post by: Be4u on February 24 2007, 03:16:01 PM: ahhhhh. gotcha
Title: Knock questions
Post by: Be4u on February 24 2007, 05:09:09 PM: Ok, I added fuel to 3-4th....from 128 to 132. Is that enough or too much?

I'll test it out tonight when I go to work.
Title: Knock questions
Post by: Top Speed on February 24 2007, 10:26:04 PM: If you have 7000 mi on the plugs, I would go ahead and pop in
Title: Knock questions
Post by: Be4u on February 24 2007, 10:39:07 PM: Yeah, the components for a spring cleaning are in the works.
Title: Knock questions
Post by: Be4u on February 25 2007, 08:22:44 PM: Am I going the wrong way with the blm's? Lower for richer?
Title: Knock questions
Post by: Top Speed on February 26 2007, 08:48:48 AM: Lower BLM's cut the fuel back. Higher for richer. What does the WB say??
Title: Knock questions
Post by: Ttype83 on February 26 2007, 09:44:33 AM: Quote from: "Top Speed @ Sat Feb 24, 2007 10:26 pm"
If you have 7000 mi on the plugs, I would go ahead and pop in
Title: Knock questions
Post by: Top Speed on February 26 2007, 10:17:54 AM: I only said that because he is having issues. Normal plugs should last 12,000 mi.
Title: Knock questions
Post by: Be4u on February 26 2007, 05:46:34 PM: Ok, I tested it out last night. WB was in the 11's no knock. But I'm not done testing.
Title: Knock questions
Post by: Ttype83 on February 28 2007, 11:25:56 AM: Quote from: "Top Speed @ Mon Feb 26, 2007 10:17 am"
I only said that because he is having issues.
Title: Knock questions
Post by: Recklessrob on February 28 2007, 06:29:19 PM: Quote from: "Be4u @ Mon Feb 26, 2007 5:46 pm"
Ok, I tested it out last night. WB was in the 11's no knock. But I'm not done testing.
Step the WOT fueling back one step at a time. Usually low to mid 12's yield the most HP. You could also try increasing the WOT timing one step at a time without changing the current fuel
setting. Sometimes richer mixtures like advanced ignition timing...