noob question about KA redline

[SketchyRollin564]

So i noticed on the S13s with the DE, the redline is at 7k, but on the S14 with the same engine, its 6.5k... wtf?

The only thing i can think of is that the S13 has different cams (which are said to be better), and thats why it revs higher?

its not really a big deal now, but the reason im asking is cause

1. im just curious like that2. im thinking about getting s13 cams 3. when i go KA-T and im making power beyond 5.5k, itd be nice to know why its 500 rpm higher on the s13

thanks in advance

[480sx]

Redline means nothing man, its the exact same engine. Your rev limiter is somewhat important, but typically gets removed when you go T anyway.

Nissan just figured because the Ka makes sht for power over 5500 rpm that it was stupid to have a 7g rev limit. Just trying to limit the stress on the engine by doing something simple(changing 'redline'), so its life would be increased.

[SketchyRollin564]

Ive never reved my car over 6k yet, and i dont plan on bringing it anywhere past the redline, untill im actually making power past the stock low powerband, and id get better performance shifting there. I just wanna be sure im not over revving it. Thats most likley not gonna be untill im boosted, unless the s13 cams make a difference?

cause with most cars, the redline basically means "stay the fck out of here!"

i dont know where the rev limiter is on the S14, but im guessing its somewhere around 7.5k?

also, this is saying i could shift at 7k on the s14 and be fine, even though thats past the redline? or is 7k pushing it. If a ka-t is gonna be making power up to 7k, i wanna be sure im safe shifting that "high"

[chrismo240sx]

^ dude in no way at all is the s14 rev limiter at 7.5 k.....the s13 limiter is around 7200 with a redline of 6900 (dohc motors..91-94), the s14 redlines at 6500, and rev limiter somewhere around 6800 stock for s14

if u wanna rev higher for boost....get some nice cams (s13 is ok) stiffer springs/retainers maybe valves too and u should be alright to rev to 7k on the ka motor no prob

btw...i shift around 6500-6200 depending on the gear when im on it (have s13)....when i get my jim wolf cams and ecu and crank pulley in about a week...ill be taking it staright to 7k....cant wait! haha

[SketchyRollin564]

Damn, so either way i wouldnt be able to rev it up to 7k? id remove the rev limiter to let it get to 7k if thats not gonna harm anything. it would make sence, if the same engine on an older car had the 7k redline that i should be fine there

since where on the topic, what makes the s14 cams worse than the s13 cams? also, why did they downgrade?

[chrismo240sx]

s13 cams are more aggresive...dont know why exactly they "downgraded" for s14 modelsi heard the ecu maps are better on the s14 to make up for less agressive cams as well (someone correct me if im wrong)

if your turboing the Ka....ur gonna need a tune, so if u get a jim wolf ecu, they remove the rev and speed limiter so u can take it to 7k and go past 118mph!!!

[SketchyRollin564]

any idea of how much they cost? also, am i better off getting them new or used.. or if im buying them new, am i better off just getting aftermarket cams?

and yeah, trust me, im not gonna even start the ka-t build till im ready for it. im not gonna be another one of those horror stories, im gonna build it right

[480sx]

Dont forget about the animal known as the KA. The engine wants to make power in is low to mid range, and does not like high rpm operation. This is due to engine geometry, and a long stroke. You can make power up high, but its much better to shift and let the low end do what its made to do.

[chrismo240sx]

for a stock motor...i would say yes, keep the revs lower and shift by around 6k. However, ive noticed with the header and exhaust, the mid and upper range was improved and the low end power was sacrificed.with the cam upgrade, im gonna lose even more power down low but make up for it in the higher rpm range

now as for the prices, i dont know what u were referring to...used cams (s13) u can find for pretty cheap around here on Nico, just look around in classifieds....if u want to do ur Ka-T project right id say just buy a new pair of some 264's or even jim wolf's 275's

as for the ecu cost...check with jim wolf...i believe its around 550 bucks and a few weeks downtime for them to tune your ecu so look into it before hand lol.