HomeDashboardFAQSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksMemberlistLog in
Share | 
 

 Scanning for KR

View previous topic View next topic Go down 
AuthorMessage
turtleman
Expert
avatar

Name : Codith
Age : 30
Location : Villa Park, IL
Joined : 2007-02-08
Post Count : 3598
Merit : 123

PostSubject: Re: Scanning for KR   Tue Mar 13, 2007 7:03 pm

im unsure as to how i scan for KR. do i need to be viewing a datastream as i drive or is there a specific trouble code or what
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: Scanning for KR   Tue Mar 13, 2007 7:06 pm

What year is your Riv?

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
turtleman
Expert
avatar

Name : Codith
Age : 30
Location : Villa Park, IL
Joined : 2007-02-08
Post Count : 3598
Merit : 123

PostSubject: Re: Scanning for KR   Tue Mar 13, 2007 7:10 pm

AA wrote:
What year is your Riv?

97
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: Scanning for KR   Tue Mar 13, 2007 7:16 pm


_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Chicken
Aficionado
avatar

Name : Mark
Age : 51
Location : Montana
Joined : 2008-06-13
Post Count : 1296
Merit : 8

PostSubject: temp   Fri Aug 01, 2008 11:28 am

from: http://rivperformance.editboard.com/series-ii-engine-transmission-f4/smaller-sc-pulley-t3656.htm

1998 Riv wrote:
Josh, you do NOT want to run a 3.4 without several supporting mods in place first, plus have the ability to scan for Knock Retard (KR) before dropping pulley sizes. Look at all the mods in my sig. I've got a problem somewhere, as I had to go back to a stock 3.8 pulley and still am seeing up to 6+ degrees of KR.

Take the time to put your car info in your default signature, and spend some time reading the FAQ sections. All the info you need can be found here, but you need to put in the effort to read existing threads.

Is your knock a constant thing or just when its under load?
Back to top Go down
http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile
1998 Riv
Expert
avatar

Name : Dave
Age : 57
Location : In The AZ Oven
Joined : 2007-01-17
Post Count : 4502
Merit : 44

PostSubject: Re: Scanning for KR   Fri Aug 01, 2008 1:30 pm

Only under load. Eventually I'll find time to play with my PT, definitely need to do some tuning work, and I do have some local help available when I'm in a position to spend time on this. Oh to be 25 and single...
Back to top Go down
Chicken
Aficionado
avatar

Name : Mark
Age : 51
Location : Montana
Joined : 2008-06-13
Post Count : 1296
Merit : 8

PostSubject: Re: Scanning for KR   Sat Aug 02, 2008 10:23 am

Dave bought up a good point....

How many times do you guys scan for knock?

How many of you scan for knock while your riv is under load? Like climbing a hill, even a small grade? Is the car cold or hot when you scan?

What are the numbers you're seeing and at what temperatures?

(AA...if there's a lot of posts for this, can you please start a new thread?)
Back to top Go down
http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: Scanning for KR   Sat Aug 02, 2008 11:50 am

These are good questions. Here are my answers:

How many times do you guys scan for knock?

I scan for KR every time I make a change to car's modification level, when experimenting with fuel octane, after engine maintenance (filters, etc.), when the temperature is very hot/cold, or whenever I "feel" something isn't right. This ends up being about once per week for me. smile

How many of you scan for knock while your riv is under load?

ALWAYS under load. Otherwise there's no point, as normally the engine is running 8.5:1 compression, when conditions for knock don't exist. A good test is from 0-100 mph with your foot to the floor.

Like climbing a hill, even a small grade?

Yes! Not many think to do this, imo. But engine load can be high under these conditions. A stock vehicle might not have issues in this area, but with a smaller SC pulley, or using less than premium octane fuel, this is most definately a concern.

Is the car cold or hot when you scan?

Both. By "cold" I mean "warm" - right after the t-stat has opened (never race the engine cold). By "hot" I mean after the transmission has warmed up to above 200F (usually takes an hour or more of normal driving). I have noticed less KR when the car is warm compared to hot. So for average street or race track driving, it's good to know the hot value. For the drag strip, the engine actually stays pretty cool in the lanes, so the "warm" value should be fine.

What are the numbers you're seeing and at what temperatures?

Not sure if you mean ambient temps, but it is a very good idea to scan when the weather is extremely hot or cold, as IAT makes a big difference. I have noticed that when sitting idle in very hot weather, my IAT will rise above 100F, even above 120F, although I try to shut the car off by this time. If I launch the car from a stop with IAT this high, I will see some KR that will disappear after I get moving and IAT comes down to near ambient.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Chicken
Aficionado
avatar

Name : Mark
Age : 51
Location : Montana
Joined : 2008-06-13
Post Count : 1296
Merit : 8

PostSubject: Re: Scanning for KR   Sat Aug 02, 2008 12:14 pm

I am seeing 0 knock when the car is started and driven, and it seems to stay this way even under load. However, If I park the car after being driven, say for an hour or two, then restart (temperatures of IAT, Tranny, Coolant are rather high by now) I see 2 - 3+ degrees on knock when I'm climbing a hill, even a small, but long gradient with outside temp of around 86*

So, is it safe to say that your always, under the right conditions going to have at least some degree of knock?
Back to top Go down
http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: Scanning for KR   Sat Aug 02, 2008 12:35 pm

Yes, it's safe to say that with your 3.5" SC pulley at 85F, you will see some KR after the engine is hot.

Heat is the culprit. When the weather changes to cold, you may not see any KR. The engine take a lot longer to warm up to "hot". Parking the car will help things instead of hurting you.

Tuning with DHP or HP can keep you out of TCC lock-up when climbing a hill. This is a great help, and one of the early steps I took with my tuner.

Using an intercooler can keep you at zero KR all the time. I would assume a tranny cooler could also help delay the warm-up time of the trans.

But 2-3 KR isn't the end of the world. either. In small amounts, I don't think it hurts the cylinders. Our iron 3800s are pretty tough.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Chicken
Aficionado
avatar

Name : Mark
Age : 51
Location : Montana
Joined : 2008-06-13
Post Count : 1296
Merit : 8

PostSubject: Re: Scanning for KR   Sat Aug 02, 2008 12:39 pm

Thanks...I feel alot better now.

...and I think I'm going to drop my pulley size from 3.5" to the size of a nickel...

j/k
Back to top Go down
http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile
Shintsu
Expert


Name : Shintsu
Joined : 2007-10-14
Post Count : 2979
Merit : -16

PostSubject: How do you measure KR?   Wed Sep 24, 2008 2:37 am

A dumb question I'm sure, but I have no idea how one would monitor this. I know you all say a lot "Do this mod and check for KR" - what tool or instrument do you need to do this?
Back to top Go down
T Riley
Guru
avatar

Name : Travis
Age : 27
Location : Your wife's box
Joined : 2007-02-08
Post Count : 5125
Merit : 9

PostSubject: Re: Scanning for KR   Wed Sep 24, 2008 2:46 am

Tape Measure/Ruler

Measure the height of the boost bypass valve. Stock is about 1 3/4 inch's every 1/8 inch up the boost bypass valve goes is considered 1* of knock
Back to top Go down
http://www.rivperformance.com
T Riley
Guru
avatar

Name : Travis
Age : 27
Location : Your wife's box
Joined : 2007-02-08
Post Count : 5125
Merit : 9

PostSubject: Re: Scanning for KR   Wed Sep 24, 2008 2:48 am

Back to top Go down
http://www.rivperformance.com
turtleman
Expert
avatar

Name : Codith
Age : 30
Location : Villa Park, IL
Joined : 2007-02-08
Post Count : 3598
Merit : 123

PostSubject: Re: Scanning for KR   Wed Sep 24, 2008 2:52 am

KR

any correlation?
Back to top Go down
Shintsu
Expert


Name : Shintsu
Joined : 2007-10-14
Post Count : 2979
Merit : -16

PostSubject: Re: Scanning for KR   Wed Sep 24, 2008 3:07 am

lol, we never checked knock on it but for the record it was not and never was my car. His first mod was the 3.4" pulley (Yeah, that was smart...rolleyes).

cont'd: http://rivperformance.editboard.com/series-ii-scans-tuning-pcm-f5/good-scanner-tuner-software-to-use-t2100-15.htm
Back to top Go down
 
Scanning for KR
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» Linux and car tuning
» FAQ: Code / Scanning setup for the 1995 Riviera
» Write Up: Scanning and Datalogging Series I L67
» Here's some good tunning / scanning software info for the LT1
» OBD indepth scanning software for Hijet?

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   Supercharged 3800 Tech :: Series II Scans, Tuning, PCM-
Jump to: