jayton41

Hey guys it me again i just wanted know if any one here has experience with raisng theyre peak rpm i know kleeman and shtrick or how ever u spell that has cams but i don think cams alone raise ur rpm please reply guys

cruzinquick

Do you mean besides a tune to raise your rev limiter?

jayton41

i know the rev limiter is the thing when ur in park and u rev it only lets u go up 2 4000 rpm if that wat u mean then no..im talkin about the 6,500 redline

SilverBulletAMG

I'm curious why you would want to raise your rpms past the stock redline?

Dykemyster

I know when I drag race if I shift 500 rpms before redline instead of shifting at redline I run faster so I am interested in why you would like to raise it? Are you aiming for sound, performance, both?

lkfoster

Higher rpms do not always mean faster. I had a Motorsport-tuned euro 635CSi years ago that used to yield the fastest end of the straight speeds at driving schools shifting at 5,200 rpm (redline was 6,200 rpm or something like that). I don't know what kind of a cam they put in it, but it could outrun 911SCs without trouble.

I kind of doubt that a C55 would benefit from a higher redline. It's not a highly tuned engine in relative terms, it's performance comes mainly from being really large displacement in a relatively light car. You'd have to look at cams, exhaust and ignition mapping to get the most out of a higher redline. You would most likely also lose some of your mid-range.

billapex

There's typically no gain to be had by raising the redline unless, as the other posters said, you've modified your car to the point that it's making power past the redline of the stock motor.

The ideal is to upshift right past peak horsepower, with the rpms falling to right below peak torque, thus keeping the powerband in right between peak torque and peak power.

Bill

phoung

in the clk55 and c55 the redline is 6700, but in the slk55 the redline is 6200, so i wonder is there a huge difference or not or which is better.

rockjock

Well-I find it hard not to chime in on this one-as your username states-at 500hp and 700tq-my guess is that you have a car that is heavily modified-so no, you wouldnt want to mess with the tune it has now....at 500hp and 700tq......

billapex

Whoops! Didn't see that. Either way, unless you're bumping up against the rev limiter and still haven't reached peak power, there's no benefit to raising the limiter.

willc55

haha, I'd love to see some pics of this monster

I wonder when LET is going to release the 500hp tune...

SilverBulletAMG

Oh you didn't know? Yeah their new tune easily runs 500hp. The new plugs and wires get you over 700tq....

500hp/700tq

jayton41

i dont have that much power i just put it up there cause it was a goal i wanted...but u dont gotta be a douche about it silver bullet

SilverBulletAMG

When you say you drive a C55 with 500/700 (as you do in your info), you're going to get some smartass comments.
It's great to have goals and we all love hunting for more power, but it would make more sense if you made it clear this was a GOAL and not an actual claim.

billapex

If you don't have any serious mods, then no, raising your rev limiter will have no benefit whatsoever (other than wearing out your engine faster, which I guess isn't much of a benefit).

If you're talking about raising the powerband higher (i.e. peak power is achieved at, say, 6,500rpm vs. 5,500rpm), then that's typically achieved with a power-adder such as cams, headwork, a blower, etc., in which case, you'd need a custom tune which may raise the rev limiter, assuming peak power is made above the stock levels.

Bill

TemjinX2

just buy the supercharger for the c55 and call it a day.

jayton41

which supercharger do u guys think is better for the money hps or kleeman

TemjinX2

you should look into kleeman, i think there having a special right now on there parts.

SilverBulletAMG

There have been some real horror stories with regards to HPS. Kleeman is hard to beat, especially at their current sales price.

Gramma_Benz

Yup, contact Cory and I bet they'll still offer you this price.

https://mbworld.org/forums/group-purchases-supporting-vendor-sponsor-specials/269681-kleemann-kompressor-special.html