Well my search has finally come to an end it seems i was getting too much knock retard around 3-5 degrees throughout 3rd and 4th especially when I started to heat up well here is your answer. LUCAS OCTANE BOOSTER! I did half a tank and a little more than half a bottle. It totally eliminated my knock on my runs today couldn't be more happy. There was knock but it came inbetween shifts so it was only false knock.

 

Sweet find, I know this is gunna be a big hit with everybody, even if they don't have knock

 

You have no idea how happy I am right now.

 

Im sure, This will be good to use for dyno runs, I would like to to see the difference it makes, since the computer takes away timing if it sees knock, and on most dyno runs, there is some knock

 

yeah I've been using that stuf for a while now . works damn good for me too specially after a couple of hard runs.

 

I have also used that stuff, its great, NOS also makes one lol.

 

i have a bottle of the same stuff on my computer desk, its the best ive used.

but come to find out the ticking i thought was knock isnt.

think its a bad tranny mount, taking it to the shop soon.

 

100 octaine unleaded fuel works great too!

 

sorry, im new to all this sorta and i honestly dont feel like searching......


what is the knock? ive heard it mentioned a few times but never seen what it is.

 

Not exactly sure what "knock" is from what I understand it could be a couple of things, but in general it is not good.

 

Spark knock is when the incoming air fuel mix is too lean usualy caused by heated incoming air from too much boost without enough fuel. Higher octaine fuel burns slower stopping the knock. Basicly what happens is whe the piston is coming up its compressing the intake charge for the spark plug to light it off. Spark knock happens cause the cylinder temps are high and that high temp causes a premature light off of the fuel. That premature light off then impacts the flame front from the spark plug and KNOCK! Its VERY bad for your engine as it will burn a hole in your pistons if left unchecked.

Hope this helps.

 

this is really why everyone with a smaller pully is using an Aeroforce interceptor to monitor knock. If you dont have one i suggest getting one or a wideband before blowing your car up.

 

Here try this...

http://en.wikipedia.org/wiki/Engine_knocking

If you need anything cleared up I'll be happy to try and answer your questions.

 

Kind of makes sense, but is it always because the car is lean? i have 60 pounders and was tuned to run 11.8 or so on the dyno I should have plenty of fuel.

 

http://en.wikipedia.org/wiki/Engine_knocking

and its not that you are getting rid of knock without tuning. your tune was never right in the first place. if you have to put in octane booster just to get rid of your knock, change the tune. this is why we cant run 87 in our SS/SC. the timing is advanced too much. so if you are getting knock with 93, then your timing is advanced too far. you could also add a Cobra HE and do the Dual Pass IC to help with that if I am thinking correctly.

Now im just going off the top of my head trying to remember all this from before. but do you really want to dump in a bottle of octane booster everytime you fill your car up?

 

Yes, too much timing (corrected by bottle) + no knock = more horsepower.
And I will only use the bottle when I plan on running the car plus it makes the exhaust smell good.

 

Check the link in my post it should help you. Why I said leaned out is cause when you lean the engine out its cylinder temps are WAAY hotter and its the biggest cause of knock.
Leaner AF mix means its easier for knock to happen, your aditive may halp a little but I doubt its getting rid of it. You need to be careful cause you will hurt your engine. I'm not trying to be a dick please don't take this the wrong way. I just don't want to hear in a couple months that you need new pistons.

Get this checked out and find out exactly why its knocking and get it fixed the correct way!
This additive is like a band-aid for someone whos had their throat slit! It may help a little but your dead in the end.

 

lol 5 people replied after i started to type my response

 

The simplest way to put knock is that its like having to sparks going off in the cylinder on one compression/power stroke.

 

Isn't knock preignition, with multiple burn waves in the cylinder that send vibrations and signals to the knock sensor setting it off? I thought detonation is the fuel violently burning, like having a bomb go off in the cylinder.

 

Its the same thing, the UNCONTROLED pre ignition and burning of the fuel. Call it what you like its BAD!

 

Octane boost, or "knock out" additives arent a bandaid

the 2 easiest and cheapest ways to reduce knock is to increase your octane, and get some colder plugs. Neither are bandaid fixes.


These additives increase the octane and usually will help clear up small amounts of knock.
If you continue to run an additive to keep your octane at that higher level, and keep monitoring your KR....you wont have any problems.

 

Thanks for backing up what I and the other boosted cars around my area have said to me. And more timing=more horsepower alloting that your knock retard remains zero. Sorry just got out of survey calc.

 

why dont people just lower compression?

 

hmmm, Lower compression, or put a $3 bottle in your tank.....or change out $10 worth of plugs.....

think about it....youll see why people do the second 2.