Cams.!

[keltalon]

I'm new to most of this but am knowable of most of it. But how do you slow down the exhaust cam? And will that effect throttle response?

Dude you already stated that you want that lope d lope sound. Let me tell you the lope d lope sound in turbo application is not beneficial to performance. If you want that mean lope d lope sound that's what you want but you can't have both for street application. You gotto make your mind up

 

[delta448]

how do you slow down the exhaust cam?

Retarding the cam means moving it's position relative to the crankshaft so that it acts on the valves later in the cycle. It has nothing to do with speed.

If you look at an adjustable cam sprocket, you can see how the portion that the cam is locked to can be moved relative to the portion that the timing belt acts upon.

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[Gst to the max]

If lope is such a dang big deal to u rice burners I won't worry about it geeze. Ive seen to many 4g63 motors on the road loaping like crazy at
Red lights excuse me for wanting to be one of them.

 

[JusMX141]

Even cars with aggressive cams shouldn't have a "nasty lope" once they're properly tuned.

The loping happens when aftermarket cams are installed with the stock fuel mapping in place. The aggressive overlap of the aftermarket cams draws more air into the engine during idle, effectively leaning your idle far beyond what the stock fuel trims are set for.

Here's what a set of 264/272 cams sound like installed in a bone-stock car (stock cams were removed to be submitted as cores and these were all I had to put in their place):

Eclipse GSX Crower 64416-2 (264/272) Cams, bone-stock car. - YouTube

^ It was so aggressive the lights would flicker at night as the RPM's wandered.

Here's what a properly tuned cammed idle will sound like:

http://www.youtube.com/watch?v=iP5eQUFS6XE



But as others have pointed out, you don't need aftermarket cams to make your car sound like that. Simply increase the overlap on your stock cams with the use of adjustable cam gears, and lean the hell out of your idle with a tuning device. The car will run like shit, but damn will it sound cool.

 

[boost97gst]

To sum it up, when hearing that lope sound your bottom end performance will most likely suffer while top end will benefit. Simple as that, unless dsms have magic cams that im unaware of. I knew when i put in my 272s that low end was gonna be a bit less, but the tradeoff for a guy like me who puts like 250 miles a month on his car was more than worth it. Its all about what application you are wanting. DD, just do 264/272 or stock cams. Big turbo, big power: Go for some 280s. Things get a bit complicated when degreeing cams though so think everything through before hand of what your final goals are and build accordingly.

Damn, just listened to those vids, mine doesnt sound that rough at all.

 

[Gst to the max]

Thanks guys for the info. I apoligize to the stress full post and what not im not exactly new to this but this is my first turbo car that I've owned myself. I've messed with and owned turbo deisel but come to find out this is much different. And how much will my car run like shit, cause right now It scoots and I love it I don't wanna screw my horse power up