higher RPM range

[GT500916]

240s are pretty low on the RPM red line 6500, V8 engines are about the same, if i do internal work to the engine how do i know where the redline moves up to? Dyno is the way? Whats a good way to move up on RPMs? Since im putting in a greddy turbo with forged and lower compression pistons, paying some good money for my internals that can handle some heat, but does that actually more my RPM up?

Polished out head and intake manifold will help the air go in faster and will that improve the RPM range?

Thanks for the info.

[SR20DETpower]

theres no need to port and polish the head on a ka24de

[Chuki_breath]

Originally Posted by SR20DETpower

theres no need to port and polish the head on a ka24de

y not? i have an extra head laying around that i was going to do for fun lol....just want to know why thats all.....i mean it couldnt hurt. plus its kinda dirty in there anyway.

[GT500916]

yea why not?!!

dont you just love these replies from people who just go .... " no i dont think thats a good idea!" without any reason behind their statements lol

[1viadrft]

I don't see why a port and polish would not benifit any car to some degree... as for the Higher RPMS? Probably not. All you are gonna get is a better flow and some HP with a Port/Polish...

[winstonusmc]

better valve springs will raise the actual redline, to what, I dont know. The spring manufacter usually will advertise. An aftermarket cam will raise your torque curve to a higher RPM so you can benefit for the raised redline. The valvetrain is usually the factor that determines redline. At a certain RPM the valvesprings cant close the vlaves fast enough. On "interference" engines this causes the pistons to run into the valves and boom. On a "non-interference" engine it just keeps the RPMs from raising.

[TatII]

to safetly raise the redline you need to get stiffer valve springs to prevent valve float at higher rpms. also you would need a cam that breathes good up top. becsue if you do that with stock cams the cams will choke out the engine at that speed which will in turn lead to making less power. however goin too crazy with the cams will make your car idle like shit since we have no variable valve or cam timing. also you need to rebalance the whole rotating assembly to allow it to spin more freely with less vibration. the main limiting factor will be the long strong of our engines. since the piston travels more distance for each stroke. even though the engine is reving not as high, the piston speed is higher then a lets say honda's pistons speed would be becsaue they have a shorter stroke. and when you over rev an engine like that, your goin to spin a rod bearing and throw that rod right thru that block.

[mynismo]

Originally Posted by TatII

to safetly raise the redline you need to get stiffer valve springs to prevent valve float at higher rpms. also you would need a cam that breathes good up top. becsue if you do that with stock cams the cams will choke out the engine at that speed which will in turn lead to making less power. however goin too crazy with the cams will make your car idle like shit since we have no variable valve or cam timing. also you need to rebalance the whole rotating assembly to allow it to spin more freely with less vibration. the main limiting factor will be the long strong of our engines. since the piston travels more distance for each stroke. even though the engine is reving not as high, the piston speed is higher then a lets say honda's pistons speed would be becsaue they have a shorter stroke. and when you over rev an engine like that, your goin to spin a rod bearing and throw that rod right thru that block.

someone knows their shit

[Tims_240]

thats what i was thinkin, jesus

[logik23]

Can a rod bearing actually go through an iron block? If it can then that's scary, what's stopping it from going through the firewall into your leg or something. lol (besides the firewall)

[UncleBenRep]

The momentum of the rod is going up and down not side to side.....i donno what would cause the rod to go horizontal. but yea that would be scary shit if it were to happen

[UncleBenRep]

my friend had a grand am and he put 150shot of NOS to it and blew a piston thru the block....dumbass.....i didnt see it myself.....but i hear from other people about blowing pistons and rods thru the block all the time.

[UncleBenRep]

what are pistons made out of.....cast iron, steel, aluminum....i guess i've never really thought about it. but if pistons are made of iron lets say and the block is aluminum then i agree that a piston or rod would go thru the block because iron is stronger and denser than aluminum is. Or else if they are both aluminum then maybe the monentum and force of the piston is soo great that it just blows thru the block no matter what. i donno...im just going off of simple physics.

[GT500916]

as you noticed my name GT500916 916 is my are code and GT500 is the car, so i have this 67 stang and i blew a rod out before and it chipped the block, and its possible to blow the rod out from the side, mine busted a hole in my oil pan size of the wrist. i had to buy a new engine because the shipped engine was just done with ... thats my story with iron blocks, strong as they are, they are not rod proof!!

[UncleBenRep]

....what makes the rod shoot out the side?