Hey guys, so im looking to install some new cams this winter and on ZZPs site the say that i would also need to install NBS and an ATI balancer to reduce vibration at higher rpm. My question is if i dont rev past 6k or 7k, then do i really need them now? I plan on installing them eventually but in the meantime, do u think ill be safe?

 

Ur already in there. Y not do it all at once

 

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Well he's not really "in there" to do NBS. In the car is a bit of a pain. I just did cams, NBS and an ATI. Personally, I didn't like the NBS. The vibes were too much for me with a DD. So I took them out. But that comes to personal preference. You can spin the motor up higher with stock shafts still. If you are only reving to 6-7k don't even bother with cams. The are just starting to make good power around then. But if you want to spin higher, you need stiffer valve springs and the ATI will save the bottom end in the long run.

 

Im just talking about temporary. My plan was to do new springs and retainers and either stage 1 or 2 cam. i plan on in the future getting an ATI i just dont have the cash right now. Im going to be going past 7k once i order that but until then do u think ill be good? And can u feel a decent power difference?

 

There's people that will spin to 8k without an ATI. It's not that you can't do it. It's just harder on the bottom end. With no ATI I would still take it to 7400. But for full benifits you need to spin higher.

I love my stage 2 cams. Comes on hard at 4000rpm.

 

ok cool thanks for the help. btw, Ive heard that stage 1 cams pretty much idle the same as stock once they warm up and dont drive much different. Is it the same case with stage 2 because im really looking for that mean sounding idle. I dont want to throw all this cash away for nothing

 

Talk to Staged07SS about his S1 cams. My car sounds really good at idle actually. Got some comments at a meet tonight about how good it sounded. But on the other hand i'm having a battle dialing in the idle and coastdown of the car. It's very finiky. They aren't bolt in and go.

 

Thats what i figured its the same way with my trans am. Im used to all the old age muscle car cam in block carb setups so all this computerized dohc stuff is new for me

 

I deleted my balance shafts in both my L61 and LE5. Balance shafts don't balance anything, the motor itself is internally balanced, they do however reduce the inherent vibration produced by a 4cyl motor.

They are not there to extend engine life, but rather reduce noise and vibration from the motor to a limit the average consumer would find acceptable.

Either way, I spun my L61 to 7500rpm for 3 years with no ATI balancer.

I spun my LE5 to 7800rpm for 2 years with no ATI balancer, still have that same motor in the car..but only spinning it to 7300rpm now with the turbo....no issues.



Fun fact, the ATI balancer has way more to do with eliminating crankshaft twist than it does with engine vibrations.

The problem here is the vibrations engine balance shafts reduce are 2nd order, meaning they exist at 2x the engine speed, which is why the balance shafts spun at 2x the engine speed as well.

The ATI balancer can only spin at the same as the engine speed.


There is an inherant problem with trying to get one to replace the job of the other, the ATI balancer is effective in doing its intended job of reduction crankshaft twist, and I would still say if you plan on spinning your motor to the 8000rpm range it would be a good idea.


However, buying one just because you are removing your balance shafts will be a waste of money.

 

I rev to 7800 with ATI Damper, ZZP s2 cams, supertech springs. I did not do balance shaft delete.

 

hockeyman do you have any pics of the ATI installed?

 

 

you get that right from ati for ~$450?

 

OP, if you are going to install cams rev to 7500 rpm or higher (depending on the cams).

After 7.5k rpm, I would look into the ati and nbs or delete.

Reving to only 6-7k with cams would be a waste of your time.

 

No ZZP

 

Thanks blu

 

I would get BS delete, ATI, stage 3 cams and springs. As far as not revving the car out until you get the ATI and BS delete, yes I would feel comfortable doing that

 

oh ps since idk how high you wanna rev to but i've revved to 7200 for about 2 years no probs.

 

I reved to 7250 rpm for 4 years, stock cams & stock springs.

No issues either.

7500 rpm now with cams & springs.

 

sweet thanks man. and it was under or overdrive?

 

Overdrive

 

Thoughts on stg 3 cams?

 

damn ok cool