S13 Questions

[D-Bo]

think about it.
8.5:1 @ 7000RPM
or
11:1 @ 7000RPM
which one will have less stress on the engine?

[logik23]

I guess, but less power with the 8.5:1

[LaYzIeNoY]

HKS makes limiter removers, I've seen them alot online

I wouldn't try to make the engine rev to high though, lower compression would up the rev but lower power which i think is a bad trade except maybe in drifting, where power isn't as major a concern, also wouldn't uping the boost up the compression rate overall thus defeating the purpose?

[logik23]

Maximum boost on 8.5:1 comp makes more power then max boost on 11:1 comp ratio.

[D-Bo]

Originally Posted by logik23

Maximum boost on 8.5:1 comp makes more power then max boost on 11:1 comp ratio.

now you know what i mean. and the engine will be able to handle the higher rpm

[logik23]

No, 12psi with a 11:1 comp ratio will make more horsepower then 12psi with a 8.5:1, but with the 11, your engine will blow in a few minutes or running it, lol. What I meant is that you can run 30 psi on an 8.5:1 and only like 10 on an 11:1 engine, so the 8.5 enigne will make more power. (these numbers aren't real, they are just an example, but the point stand, so don't flame me.)

[D-Bo]

yeah yeah that makes sense i just had them backwards.. its 12:50 and i had turkey leftovers tonight so i'm a little groggy.. time for bed

[logik23]

Yeah, it's same time here and I'm just cooking myself some KD and getting ready to watch some shitty late night info-mercials lol.

[sidewayzS13]

hey those infomercials arent shitty they are informative and they make me realize that i maybe a pathetic person for watching them but im not as pathetic as people who actually order the shit being sold on the info mercials. the only thing worse then info mercials is watching fishing and the onlything worse then watching fishing would be if you were a fishing show editor and had to watch all the " unexciting" parts that were filmed during a day of fishing and i have no clue why i started talking about this so ill stop

[logik23]

Yeah, Chef Tony rocks....actually, I was thinking of trying one of those get rich quick schemes, I mean it's like 30$ for starting and the people who talk make like 6000$ a week!!! Ok, I'm kidding, well half-kidding, I know those people are lying, but I still wanna try, like the Greatest Vitamin In the World, the pill is probably a placebo, but if I can get rich by screwing people over, I don't care.

[sidewayzS13]

hey ill be happy as long as im not editing a fishing show or it would also suck to write a script for a fishing show

[orestes]

uhh isnt the main thing limiting how high an engine can rev in the valvetrain? like the K20 can rev to 10,000 rpm with upgraded valve springs and retainers... i mean if you have a real long stroke that is going to be more stress with high revs but i think the real definitive problem you run into with over-revving is "valve float" (when the cam is turning so fast the valve cant make a full cycle before its pushed on again, so it kinda just stays open). so if you are getting that at a certain rpm, then changing to lower compression pistons will not take that problem away, and you still wont be able to rev higher, correct?

[logik23]

Low comp pistons will just lower the mass of all that moving shit inside the engine, which in term makes it rev easier, but yes, the main thing responsible for high revs is a good valvetrain.

[S15Drifter]

Skip the chips if you can afford to do so. Get a reprogrammed ECU or piggy-back system. AEM, Greddy, Apexi, they all make an ECU or ECU addon system. Then you can make adjustments, even to your rev limiter.

[sidewayzS13]

they have some badass ECU's at flashoptions