What the fuck is this "overfill" you're talking about? It's almost like you don't understand how motors work.


Do you have anything other than half-cocked theories to refute the proof that was found in TESTING by ACTUAL HUMAN BEINGS in THIS VERY THREAD concerning THE EXACT SUBJECT you're trying to shit all over? Or are you just reciting some old bullshit written in the 60s and 70s?

MORE COMPRESSION IS MORE GOODER UGH UGH UGH UGH.

Jesus.

No, while your spark timing needs to be precise it needs to be at the right time too. Theres this thing called Mean Best Torque timing which is the timing advance that makes the best torque under a certain set of conditions. You want to be tuned to be at MBT under all conditions to make the most power. With too much compression you will knock with less advance than MBT so you cant get to MBT so you'll make less power on these engines. Some other engines can make more power with more compression and not having the timing at MBT.

I'll take a few minutes to explain it if you're legitimately interested in learning why it's true, but I get the feeling you're just trolling and I'm not interested in wasting my time.

Yes. Spark has to be at the right time anyone who knows how to make power knows this but do you know when your aiming to make maximum cylinder? As in how many degree's atdc.

Are you going to keep defecating all over this thread or answer the simple questions we've already asked you?

Yes I know when, when I'm sitting on the dyno holding a steady load and rpm and the torque number stops going up when I hit the +1 button in that cell of the spark map.

You're aiming for whatever makes the most power. It's really that simple.

When you turbo something you're physically pumping more a/f mixture into the engine. Also know as volumetric efficiency. On a naturally aspirated setup the VE is around 70ish% on a turbo application the VE can reach +110% therefore "over filling" the cylinder.

Exactly. So when your tuning you keep adding timing until you reach peak torque. Yes ik its that simple and that's what I've been saying the whole time.

I have a feeling he's some redneck that thinks raising compression statically and dynamically are the same thing

I read the first page to this thread a while ago and decided it wasn't worth replying to. It was kind of fun to read but i'm over it. You all should be too.

Tork: You asked what shop sav worked for and it's all over his sig and user as an authorized vendor. If you ask a dumb ass question like that why should we even bother considering your opinion.

I'm aware of how it happens.

I'm just saying that "over-filling" is pretty much the worst way to describe it to anyone that understands the English language and made it past middle school.

I sure don't sir. Change static by changing pistons, milling head, removing shrouding in the chamber. Change dynamic by boost pressure. Also known as effective compression in other markets.

How? If you have a beer mug and you fill it to 110% (for example only) how did you not over fill the mug??

When you overfill a mug, it spills over, bringing it back to 100%.


Incredibly shitty terminology.

i think they are more the tea sipping type...

I'm still curious how many BP's each of you insanely idiotic n00bs have built and tuned to even 300whp, or if we're going to keep discussing BP building and tuning strategies with a circle jerk duo that thinks all 4 cylinder engines are created equal

how else would you describe "over filling" a cylinder? I said over filling simply because judging by the intellect level on this thread already I doubt that you would have known what Volumetric Efficiency was.

The cylinder is "full" whether you have a VE of 70% or 110%.


I'm curious to hear what sort of testing you've done on a BP to show that more compression is always better, myself.

D-d-double shitposting!?!?