My setup is GM St 2, 2.8" PB pulley, Injen CAI, and Ingalls ETD

I never get knock at WOT in 1st, 2nd, or 3rd. I rarely ever go WOT in 4th

Well I did go WOT in 4th today, and as the RPMs climbed closer to 4, 5k, i started seeing up to 4.5* of knock?

Can anyone explain this? How could I fix it if it will be a problem? Thanks guys.

could be the cold weather. Deffinetly dont go as far as 4th for now until u get a retune man. You timing might be too high? your AF is too lean. Could be a bunch of reasons. I was getting 4 degrees of knock with my 2.6 and I had to take out 5 degrees of timing and now I get NO knock and my AF is 11.5-12

or I just remember that the COT protection and kicks in around 5k, but this only richens your car so it couldnt be that. Maybe you car was wayy hot, and you MAF Feq got freaked out at such high speeds(Used to happen to me until I raised it to 1300000) and then with the COT P on the car was running soo rich it pulled timing.

the car was running normal temps....around 190*

hp tuners is the only way to adjust timing and AFR right? i'm sorry i'm oblivious to tuning

My setup is GM St 2, 2.8" PB pulley, Injen CAI, and Ingalls ETD

I never get knock at WOT in 1st, 2nd, or 3rd. I rarely ever go WOT in 4th

Well I did go WOT in 4th today, and as the RPMs climbed closer to 4, 5k, i started seeing up to 4.5* of knock?

Can anyone explain this? How could I fix it if it will be a problem? Thanks guys.



Stupid question whats WOT?

Wide Open Throttle

I get 3-4* with ONLY stage 2. but i believe it is because the best octane i can get is 91, and lately my IAT1 has been about 30 Degrees Farenheit hehe.

Ive tried asking if 3-4* is a problem but no one seems to answer....

I get 3-4* with ONLY stage 2. but i believe it is because the best octane i can get is 91, and lately my IAT1 has been about 30 Degrees Farenheit hehe.

Ive tried asking if 3-4* is a problem but no one seems to answer....
yes any degree of knock is not good

*shrug* what can you do, its a stock car with stage 2.

*shrug* what can you do, its a stock car with stage 2.
what plugs do you have?

stock....i have a set of 1 step colder NGK sitting here....havent tried them yet.

stock....i have a set of 1 step colder NGK sitting here....havent tried them yet.

I would definately try them. Also, how do you read degrees of knock. I am guessing a scan tool.

Okay here's a few answers to everyone's questions.

Todd from Intense Racing has told me that up to 7 degrees of knock is "acceptable". Of course any knock at all is not good but you have to remember that usually for every .5 degrees of knock you get, the ECM is going to pull at least a degree of timing.

Now with my mods I am currently having a problem with my A/R. Right now it is in the 12.5 range through the RPM band and I don't get to the 11's until above 6k. I need a custom tune bad or I need to send my PCM off to Intense to get them to reflash it. Now on really cold nights, sometimes I never make it to the 11's at all...which is not good. Target AFR's on our cars is around 11.8 to 11.9 all the way through.

Now as far as knock goes, I am getting 3 to 7 counts of knock at any given time, even in third gear. But in fourth gear it definately goes up. Also look at your IAT2's though because usually when the go up, the knock goes up.

I would try the colder spark plugs. I am running NGK BKR7E's....the Autolite copper plugs that come with the Intense kit, regardless of what Intense says are not good. I was getting spark breakup in the upper rpm's. Went to NGK's and I haven't had a problem, except I would recommend playing with your gaps some. Right now I am at .035 but I think I need to drop down to .030 to prevent the spark from blowing out in the upper rpms.

Hope this helps.

Later,
Vince.

Okay here's a few answers to everyone's questions.

Todd from Intense Racing has told me that up to 7 degrees of knock is "acceptable". Of course any knock at all is not good but you have to remember that usually for every .5 degrees of knock you get, the ECM is going to pull at least a degree of timing.

Now with my mods I am currently having a problem with my A/R. Right now it is in the 12.5 range through the RPM band and I don't get to the 11's until above 6k. I need a custom tune bad or I need to send my PCM off to Intense to get them to reflash it. Now on really cold nights, sometimes I never make it to the 11's at all...which is not good. Target AFR's on our cars is around 11.8 to 11.9 all the way through.

Now as far as knock goes, I am getting 3 to 7 counts of knock at any given time, even in third gear. But in fourth gear it definately goes up. Also look at your IAT2's though because usually when the go up, the knock goes up.

I would try the colder spark plugs. I am running NGK BKR7E's....the Autolite copper plugs that come with the Intense kit, regardless of what Intense says are not good. I was getting spark breakup in the upper rpm's. Went to NGK's and I haven't had a problem, except I would recommend playing with your gaps some. Right now I am at .035 but I think I need to drop down to .030 to prevent the spark from blowing out in the upper rpms.

Hope this helps.

Later,
Vince.


i have those plugs and they are set at .40 .... maybe i should regap them at .38 or .35 and then do a few runs?

and btw i am getting my readings from my interceptor

how would i change A/F and timing? is that done by HP tuners?

I would definately try them. Also, how do you read degrees of knock. I am guessing a scan tool.


Aeroforce interceptor.

and im only getting that reading for a very short blip from aboud 4k-5k rpm in 4th.
and about 1-2* from 4-5k in 3rd.

98% of the time its 0.0

hmmm
looks like this


RPM----------1-----------2----------3---------4----------5-----------6----------7

0--0--0---0---0---0---0---0---0---0---0----0---0---1---2---1---0---0---0---0---0

i had my datarate maxed out and I only see actual numbers for about 3-4 refreshes tops...

but like i said....with 91 octane and snow+ 30 farenheit im sure that is causing the problem more than anything

yeah occasionally shifting will give a little bit.

Im trying to find some 94 but everything close to me only has 91 :/


The weird thing is...im completely under warranty with only stage 2....and basically theres nothing gm can do for me lol

U guys have nothing on me.....here's what mine looks like

RPM --1--------2--------3-------4--------5------6-------7----7400
KR 0---0---2--3---2---4444444433333322244443334??????!?!?!?


I have one question: WHen you take away timing in HPTuners, are you losing hp? It would make sense to me that u were....but I want to know for sure.. Right now my car is set to about 20 degrees...but I think it's too high.

Yup hptuned..the sad thing is that that knock is in 2nd gear.....I haven't had the balls yet to try 3rd, 4th, or what would probably kill my car, 5th....I seem to think there's a knick on one of my pistons or something that is causing detonation....my freakin car sux man. And now my boost bypass actuator went. That crapped out so I need a whole new supercharger. AHHHH. I'm just going to sell this car for $5 when the camaro and challenger comes out and pick me out one of those.

how would i change A/F and timing? is that done by HP tuners?
Yes. You need HP Tuners and someone that is willing to tell you, show your, or flat out change it for you.

If you're getting knock only in 4th during a WOT run through the gears, I bet it is your IAT2. Do the dual pass, upgraded HE, or both, and you won't have a problem.

Yup hptuned....I seem to think there's a knick on one of my pistons or something that is causing this....my freakin car sux man. And now my boost bypass actuator went. That crapped out so I need a whole new supercharger. AHHHH. I'm just going to sell this car for $5 when the camaro and challenger comes out and pick me out one of those.
20* of timing with a 2.5!!!! You need to pull some timing bad. Blown 4-banger can only run about 20* with 101 octane with his 2.6 and Cobra HE with out getting knock.

i think i will go drop the NGK's in tommorow morning and go for a drive.

Ill post here if i find any changes :) maybe ill drive around and find some 94 oct somewhere in this snow covered country lol,

I was getting knock, while trying to tune for my pump gas tune. I kept tuning until I got 0.0 across the board. As it ended up I could only run 15.5* of timing with a garentee of no knock. I could run more but I would get occation knock here and there. Also if your having trouble with a spacific area getting knock, try shortening the knock decay. It controls how fast the computer adds timing after getting knock. The stock setting is .450, and mine is at .700 so instead of getting knock like
0-0-0-3-2.6-2.1-1.7-1.2-.8-0-0
I get knock (if I did get knock)
0-0-0-3-2.1-.8-0-0-0

20* of timing with a 2.5!!!! You need to pull some timing bad. Blown 4-banger can only run about 20* with 101 octane with his 2.6 and Cobra HE with out getting knock.
No, after some MAF tuning and VE stuff I can get 24*. Well that was with just the HE so I could prolly get like 26-27 now.

Yeah, my friend is running 25 degrees on pump gas with his 2.5 and no HE. No knock whatsoever.

#1 is it cold where he is?
#2 does he have water/meth injection?
#3 is he using 93 or 94 octane pump gas?

1. CT, so kinda
2. No
3. 94 I belive....I always use 93 though shouldn't make THAT! much of a difference

East coast 94 octane on a scale of 1-10 = 10.5 to 11
West 91 octane on a scale of 1-10 = -1 to -3

Yeah, the 93 octane i put in my car was actually tested and came out to 94.1 octane.

Q: if i cant find any local 93oct + will an octane boost make enough of a difference to at least test if it will help?

I know you can get that expensive stuff that ups the octane a couple points....

I don't like octane boost....It just doesn't seem to do anything. My advice, try and find a station that sells 93. There has to be a website where u can find that stuff

The only octane boost I use is a couple gallons of 101 race gas

I want to try 116......muwahahahahahaha bye bye pistons/and pretty much my whole engine

Na, Just bye bye cat (if you have one) and bye bye O2 sensor.

i read that some old school guys use this paint stripper as a booster i wouldnt use it unless you do your research but it actually made a pretty big difference. and this wasnt just on old cars some guys i know have tried it on newer ones and gotten good results.

Toulene aka methyl benzine is what some people use to make home brew race gas. It's actually pretty safe from what I've read and you can buy it at any hardware store/paint store for $5-10/gallon.

Check out this link for more info:
http://www.elektro.com/~audi/audi/toluene.html

Wow, thats pretty crazy! I usually put 3 gallons of 101 per tank. When I race, I run it down to fumes (to the point were I'm worried I won't make it to the station) then put 5 gallons in, drive it about 40-50 miles then put 2 more gallons in, THEN race just ensure I have 100% 101 octane. Boy does a car running on race gas smell good!

hmmmmm
i just read that entire article.....

very convincing....very interesting indeed.

anyone have personal experience with touline?

Yes. You need HP Tuners and someone that is willing to tell you, show your, or flat out change it for you.

If you're getting knock only in 4th during a WOT run through the gears, I bet it is your IAT2. Do the dual pass, upgraded HE, or both, and you won't have a problem.


the last couple of weeks my IAT2's haven't gone over 100*...

and i don't really run through the gears, it's just any time i put it in 4th and hammer it i'm getting knock..
l
ike this

RPM 1....2...3...4.......5.......6......7... (in 4th gear)
KR...0....0...0..2.5..3.6..4.1...3.5...2.0


none whatsoever 1-3

Hmm... That is very strange, your sure your IAT2 isn't getting really high? What size pulley do you have?

well i just went and did some recording on my interceptor.....

Looks like im getting about 4* in 3rd at 4500rpm...

I picked up some octane boost and found a 94 octane pump in the city...so hopefully after i can get a full tank of 94 in it should help....
couldnt find my no-sieze so i havent changed my plugs yet.


Kinda annoying that im getting knock with only stage 2 though :(

the last couple of weeks my IAT2's haven't gone over 100*...

and i don't really run through the gears, it's just any time i put it in 4th and hammer it i'm getting knock..
l
ike this

RPM 1....2...3...4.......5.......6......7... (in 4th gear)
KR...0....0...0..2.5..3.6..4.1...3.5...2.0


none whatsoever 1-3

My car does very similar things. If I do a WOT run 1,2,3,4 I don't get knock. But if I downshift to 4th and punch it I get knock. Its timing related. When I lower my timing it decreases or goes away.

Update: filled up with my first FULL tank of E94....(1/4 tank added last time to a 3/4 tank of 91)

so i dropped in a 7 point octane boost + a 90% tank of E94 and on the way home i started recording with my interceptor.....
after multiple runs through 1 2nd and 3rd i could NOT get my knock to even display 0.1

I opened it up and worked the car hard for about 20kms and did not see 0.1* the whole time.


I havent even installed my colder plugs yet....

I think maybe instead of saying stage 2 needs premium fuel they should state that it requires 94 octane.

because 91 oct Premium did not cut it for me.