valve springs and cams question?????

[matsm21]

what will actually happen if I don't replace the valvesprings when swapping in new cams. its a daily driver (although with high miles, over 100 on the clock)
just wondering how important cause of the PITA factor in installing them while the heads are on the car.
thanks

 

[GinoGT]

I believe that the stock valve springs are okay if you go with a very mild cam, but Bill (mustang92) still opted to swap his springs for his cam swap (VT Stage 1 N/A) because of his 100,000+ miles. In any case, swapping the valve springs is good insurance.

The reason for better valve springs is that fact that the stock ones will fail with almost any type of aftermarket cams (again, with *maybe* the exception of the most mild grinds).

I would never want to experience a valve spring breaking.

 

[matsm21]

thanks , looks like i'll be doin it cause im prolly goin w/ the VT stage 2

 

[GinoGT]

thanks , looks like i'll be doin it cause im prolly goin w/ the VT stage 2

Stage 2's DEFINATELY need springs, those things are pretty lumpy.

And they sound absolutely

Out of curiousity, do you need to pass a sniffer? I've heard that can be an issue with the more wild cams.

 

[lopey4.6]

Have you done a head swap yet?

 

[matsm21]

i do have to pass emissions, but the guy(sorry, forgot name) from VTengines said it'd be ok in NY.
no I haven't done the headswap yet but this was kind of a decision making factor, cause w/ the high mileage im gonna need a rebuild before I make any real power. so i was gonna put cams and the PI intake on in the time being.(im sure you guys all saw that thread on the pi intake over npi heads). the logic was that I could always take the cams out and reuse them in the rebuilt motor. I just don't want to drastically reduce the life of the engine , as its running very strong now, and I like it to be rebuilt on my terms. no suprises, you know

 

[TJM01]

I would recommend changing the springs. Think about it this way, it would be one less thing to do when you do rebuild for power.