Why wont my cammed car lope???

[J-Rod6410]

Looking for some help. I've installed the bolt-ons....LT headers, CAI but I wanted more power..... but I especially wanted my car to lope heavily at idle. So then I installed a cam kit myself a few months ago. I then had it tuned by someone who, well, did his best. Anyway, after going back to him several times to tweak here and there, he finally got the car to lope...when the a/c compressor is on only Now that its cold, the a/c doesnt run and the idle sounds like crap(to me). It idles pretty damn smooth. I loved it when the car loped and rocked back and forth Problem is it ran badly, bucked, surged, hesitated and was exremely rich. Now had it retuned by someone else(prefer to keep names out). Car runs alot better, a/f ratio is now good and picked up a few ponies but the lope is all but gone

I got a BIG cam because I wanted a BIG lope. Specs are 235/251 621/624 113 lsa. So can any tuners or somebody out there tell me what parameters need to be adjusted in the idle to make it lope and rock back and forth(EFI Live). Right now its kind of choppy but nowhere near where I'd like it to be.

EDIT: This is a video of my car. I decided to add one to the first post due to all the confusion



BUT, I want it to sound like this. You can really hear it at the :55 mark of vid:




Please help me (and my tuner). Thanks in advance for any help

[el ess A]

After reading that incredible post, that's about 2 minutes of my life I'll never get back...

[acowherd]

What's your Idle set at???

[BlaSSt Off]

Seriously?

[PoleCat2SSRS2010]

Originally Posted by acowherd

What's your Idle set at???

X 2

Idle rpm has an effect but is sometimes required for driveability and or operating vacuum dependent accessories like the brakes or AC (depending on the design of the car)
A bigger cam might put driveability at risk.
Rich conditions cause heavey lope but are not good for the life of the engine.
The old cars with the carburetuers would use cams that had a 106 LSA that had more overlap and tons of lope but could be converted to manual brakes and use a vacuum reserve can.

[xx_ED_xx]

I never buy a camshaft for the sound. With that being said. IS you car a manual or auto? A manual car can get away with more because it doesnt need to idle in gear.

I tend to pick mild camshafts because after driving big camshaft cars on the street I got sick of surging etc and poor around town drivability. The specs you stated are just a lil bit smaller then the hydraulic roller I am putting in my 8.85 liter motor.

[Chalk_2]

It sounds pretty lopy to me.

[Wilburbeest]

Really?

[fastfaster]

its a shame you're getting sarcasm instead of help.
is the 235/251 spec @ .050?

[Chalk_2]

Originally Posted by Wilburbeest

Really?

Ya Really.

[Epitaph]

Originally Posted by Chalk_2

Ya Really.

No Wai!



Seriously though, try talking to another tuner (or a sponsor of this forum). They may be able to help you.

[danhr]

because you cammed it wrong... that's why your car won't lope

[Tampa Tuning]

1) you can lower you idle
2) when you lower your idle, adjust your idle spark table a couple degrees so it doesnt stall when you come to a light
3) make your under and over speed timing table wider


I made a correction. I meant under/over speed in your idle adaptive spark control

[getarz4u15ster]

Originally Posted by jrrod6410

Looking for some help. I've installed the bolt-ons....LT headers, CAI but I wanted more power..... but I especially wanted my car to lope heavily at idle. So then I installed a cam kit myself a few months ago. I then had it tuned by someone who, well, did his best. Anyway, after going back to him several times to tweak here and there, he finally got the car to lope...when the a/c compressor is on only Now that its cold, the a/c doesnt run and the idle sounds like crap(to me). It idles pretty damn smooth. I loved it when the car loped and rocked back and forth Problem is it ran badly, bucked, surged, hesitated and was exremely rich. Now had it retuned by someone else(prefer to keep names out). Car runs alot better, a/f ratio is now good and picked up a few ponies but the lope is all but gone

I got a BIG cam because I wanted a BIG lope. Specs are 235/251 621/624 113 lsa. So can any tuners or somebody out there tell me what parameters need to be adjusted in the idle to make it lope and rock back and forth(EFI Live). Right now its kind of choppy but nowhere near where I'd like it to be.

I want it to sound like this:




Please help me (and my tuner). Thanks in advance for any help

Okay, So first of all thats alot of duration on that camshaft.. 235/251?? In combination with a semi-tight LSA... your driveability with this cam is going to stink at anything below 1200rpm. I can almost guarantee you that fact. However I'm not trying to dog on your choice of camshaft, I just want to give you some sound advice here.. Only reason i saying this is because i used to have a VERY similar cam in my Camaro. It's specs were 236/243 .614/.624 w/ 113LSA. It sounded pretty much exactly the way yours does, which i think is pretty dern choppy to me. And the the drivability at anything below 1300rpm was surging and bucking most of the time, 5th gear will be your friend at anything under 68mph...

If you wanted "more lope" per-say, you should have had it ground with a 110LSA that would have been REAL choppy (LSA is what gives you more or less lope, not solely but it's a big contributor)... however the tighter your LSA and the more duration you have typically the worse your driveability gets at low RPM. The camshaft you have, should make good power at anything over 4000rpm. The only other way to get the car to sound MORE choppy is set your idle speed down... be careful with that though as you can start causing vacuum issues and spark related knock problems, It should be idling right around 870 to 950. The Only other way to get a choppier lope.. turn the AC on.. it will pull more vaccum from the motor thus lowering the RPM a little, and get's a little more choppy..

Let's be honest though, is it the sound that really matters here the most, or is it the power that car makes.. I could make a moped sound like a street bike with the right parts... however, it still doesn't mean it's going to be any faster at the end of the day. The RIGHT combination of parts in these cars are the key.