Detonation is caused by too hot of a A/F mixture, either by high compression or a lean mixture. If you’re compression pressure is too high you run the risk of flash igniting your A/F mixture WAY before it should be igniting. Also, the more fuel in your A/F mixture the lower the ignition temp will be. So by have too lean of a mixture with high compression pressures can result in a “hot spot” on the piston or head causing detonation. As for the know sensor…yes it is a peice of shit when used alone… you only get a CEL…but when hooked up with either a SAFC 2 or VAFC 2, which both monitor the knock sensor, you can monitor your knocksignal, if you have knock, and you can up your fuel and bring it down. If, however, the slight detonation isn’t from “heat” in general, you could also attempt to retard your timing a bit. The more tightly packed mixture will cause a bigger bang and could be picked up by you knock sensor.
Detonation is caused by too hot of a A/F mixture, either by high compression or a lean mixture. If you’re compression pressure is too high you run the risk of flash igniting your A/F mixture WAY before it should be igniting. Also, the more fuel in your A/F mixture the lower the ignition temp will be. So by have too lean of a mixture with high compression pressures can result in a “hot spot” on the piston or head causing detonation. As for the know sensor…yes it is a peice of shit when used alone… you only get a CEL…but when hooked up with either a SAFC 2 or VAFC 2, which both monitor the knock sensor, you can monitor your knocksignal, if you have knock, and you can up your fuel and bring it down. If, however, the slight detonation isn’t from “heat” in general, you could also attempt to retard your timing a bit. The more tightly packed mixture will cause a bigger bang and could be picked up by you knock sensor. And what are these CORRECT figures that you put into the calculator?
Have you ever tuned a car? timing has a big affect on detonation, excess fuel cools the combustion chamber preventing detonation.
I put into the calculator a b16b piston with a gsr block with a b16a head = whatever I posted. not anything close to what you posted. its amazing people can’t use something as simple as that comp. calculator.
timing has a big affect on detonation, excess fuel cools the combustion chamber preventing detonation.
Didn’t I just say that? Yea, I believe I did. And that comp. calc. required more input than just what block, head and pistons you have. What did you put for piston to deck measurement? What about your head gasket? Or did you not even notice those factors?
hello capt. dickhead. I put in the correct info in ALL the fields. just let it go.
I’ve never seen any proof, despite a lot of research, that high CR and/or high displacement FI gives a proportional gain in HP compared to the amount of money it costs. I was going to do a high compression high displacement motor but as I did the research I found that the gain just wasn’t worth the cost.
I’ve come to the conclusion that most people over-build their motors for their goals based on shops giving self interested advice. I know I did for my first FI motor, that thing was build to contain a small nuke but I never came close to using all of it. The motor I’m building now is mostly stock. Should cost about $600 total with parts and assembly. Maybe it blows up, maybe it doesn’t…but at least the results will be from all of my own decisions.
Here is a link to a compression calculator. I like it better than c-speedracing. You can put info in about how much milling your head will change your compression. It also gives your head to valve clearance.
Here is the Link
this comp. calculator is WRONG, it says that a b16b has 10.8:1 compression. that is WAY off.
Edited for now