I have a CAM in a 2008 LS3 that idles very rough. It lopes to the point of shaking the hood at idle. The idle speed is 900 rpm warm and 1000 cold. The Cam is spect'ed at 227/239 .614/.624. Can this roughness be made more docile via programming? Where can I take it?,I am located in Nashville TN?

 

what's your cam's lsa

 

Beefy cam for an LS3......

500rwhp, bolt-on/cam LS3's have far less.

 

YOU NEED A TUNE BAD....

 

I'd say he has a mid sized cam, I can't think of one under 230 on the intake that's made 500rwhp...Either way the OPs cam should easily idle under 1k rpm, who tuned it?

 

I was thinking more on the exh side. I know there's a couple 228/232 cams running around that are just over the magic "5" at the wheels.

 

A good tuner can make your car run smoother. The tune makes or breaks cammed cars for drivability.

 

What is the LSA?

If its a 114LSA then you have about 5 degrees overlap which is healthy but it should idle at 900, not 1900. The lobes are also aggressive ones which makes it act like a much larger XER lobe so it may be acting more like a 8 or 9 degree overlap cam due to low lift values during overlap being really aggressive. This is exactly why I limit overlap in cams.

What did the car dyno at?

Can you post a dyno sheet with a/f ratio?

 

yea thats nuts, my cam has much more lift (.624/.624) and idles at 900 fine (239/251, 113+2). Like everyone said, whats the lsa.

 

What power did that cam make?

Was that the vengeance 500hp/457rwtq car with the FAST lSX?

400rwtq at 4100rpm should feel like boost coming on at that rpm.

 

low 500's, but I have stock clutch/flywheel,heavy whees, and no underdrive pulley.

 

If the car is actually idling at 1900 rpm there is something wrong. The idle is set at 1050 cold and 950 at operating temp.

 

I made a typing mistake. The idle speed cold is 1000 after warming up it is 900 and bounces a bit from 900 to 1000. When sitting at a light, the car shakes. The owner told me that it dynoed at 484 RWHP. As i said earlier, the CAM is 227/239 .614/.624. I know from crap about CAM overlap etc. I just want something that idles closer to stock.

 

Hi Ron
I made a typo. The idle at cold is 1000 and when warm 900 but it bounces from 900 to 1000. Did you guys set this up to lope for Andrew? I know that He mentioned that He wanted a lope when He had the work done. If so can a tune take the lope out or am I still looking at a CAM change?

 

Yes sir.

 

From reading all the info on recent cam threads, it's coming out of my ears! So from what I'm grasping the small overlap is what keeps the street manners? A 232/234 114lsa should have good driveability @ 1600 RPM, but still be good for close to 500rwhp?

Mike

 

I have almost that same cam , also from Ron at vengence 227/235 .613/.620 on a 114 LSA I have the idle set to 830 RPM warm. The cam has a nice lope performs well.

 

Len we could smooth it A BIT playing with timing/fuel, but I think you would be better off with a much more mild camshaft of even a stock LS3

Give me a call if we can help you out.

 

Lobe profile (XEER, XE, LSK, XFI, LSL) all will have an impact on the cam's performance.

I got vastly different results with the same durations and different lobes

I used a 230XER/234XER 114
230XFI/236XFI 1145+2 (horrible result)
230XFI/230XFI 115+2

you cant mix and match these things thinking youre going to outdo tuners who install 8 versions of the same cam to dial it in.

Go with a proven cam instead of trying to rethink it for better results.

I have seen a 232/234 114 (looks like the original TQer 2 cam) not make more than 485rwhp and its 5 degrees overlap.

Why not just use a cam that has made 500rwhp many times by independent installers and tuners?

Another forum member just got 501rwhp and 455rwtq with the 230XFI/234XER 114+2 and it made 400rwtq at 3477rpm. His results echo AndrewZPSU's result and is the 9th car to hit this number on an LS3. At 4 degrees overlap its a winner all around. He will be posting his results and dyno sheet. Personally I think al you get going bigger on the intake and having more overlap is self defeating. It doesnt get more power down so why go bigger?

If you want the bigger cam I more with, PM me for details. It is also low overlap.