simple cam question

[spidy3]

getting my engine rebuilt soon and I was thinking of getting the 264/272 HKS cams. My question is, are stronger valve springs and cam gears NEEDED? I know they are "recommended" but if I dont have the money to do all that with it.

Thanks,


Dom

 

[weith1111]

Nope. My profile=264/272 cams, no springs. If you stay out of the 7500rpm range your valvetrain will be thankful, though.

 

[dnhieu]

psssshhhh!spend the 250 and spin to 8k!

 

[weith1111]

You don't NEED them, but you SHOULD have them. I don't, and everything works fine, but I'd feel a lot better knowing I can bounce it off the rev limiter all day...

It's all about how you want to feel, a little lighter in the pocketbook or a little heavy on the conscience?

 

[spidy3]

stock rev limiter is 7400 correct? so i would be fine since thats what i have it set as for my stage 3 chip

Dom

 

[weith1111]

stock rev limiter is 7400 correct? so i would be fine since thats what i have it set as for my stage 3 chip

Dom

I'm not sure on that, but I don't picture shifting too late and getting into trouble, I picture hitting 2nd instead of 4th. No rev limiter is going to save you from that. Half a second at 9k rpm is going to ruin you. This is what I mean by piece of mind.

 

[90blacktsiawd]

stock rev limiter is 7400 correct? so i would be fine since thats what i have it set as for my stage 3 chip

Dom

The stock rev limit is 7500. I have comp 200 cams which are similiar to the straight 272's. I have a stock rebuilt head. I've takin mine to 7500 on several occasions. I did have a roller rocker destroy it's bearing and in turn the lifter that was under it. Of course there is no proof that is was the cams fault. But then again they only had about 2400 miles on them. Of course breaking a rocker isn't what most people would be worried about in this situation. I keep it to about 7200 now. Just giving you something to think about.

 

[spidy3]

think im going with Comp cams (ones equal to 264 hks'). I have read that they are fine with stock internals (if false please let me know), but my question is, if I get new springs (will probably go with SI dual valve springs and Ti retainers) are new valves/valve guides necessary?
Also, what about cam gears? worth it? or needed?
I am pretty much spending my savings on this rebuild so i cant go too big, just over $2k isnt going to get me too much.


Dom

 

[weith1111]

Don't do cam gears unless:

1. you are or plan to be an extremely experienced tuner and spend some decent time on the dyno
2. you plan on needing to squeeze every single HP out of the motor

Money is spent wiser elsewhere.

My .02

 

[90blacktsiawd]

When i got my head doen and i was doing cams i figured that i might as well do the gears at the same time. Not even just for the fact that you can pull out alittle more hp and tune your power curve to be more of what your looking for, but for the fact that i've been told many times that once these motors are rebuilt that sometimes Top Dead Center isn't always exactically that and the cams would need to be zereod in to compensate.

I didn't end up getting the gears due to lack of funds and advise from the guys at DSMotorsports. But if you have the money and don't mind taking the car to the dyno to get them dialed in i say go for it. Though with most of the major cams for our cars these days (HKS, FP's, Comp's) they are supposed to be able to be dropped in straight up and be fine.

 

[weith1111]

Hmm, yeah, let me rephrase my statement about getting more out of the motor. In theory the gears will only be moving the powerband, changing when and how power comes on, which doesn't necessarily add power, it just makes the car feel very different. Note that MANY 400hp+ motors are using stock cam gears, and some people that have cam gears, like myself, probably didn't know what they were getting themselves into and just took advice from a shop and advanced the exhaust cam a bit. Or left them both at zero which negates their usefullness

 

[90blacktsiawd]

What you say is true but again, if you are willing to spend the time/money to get them dailed in then by all means. It's another way to get your car to run like you want it too.

 

[90blacktsiawd]

think im going with Comp cams (ones equal to 264 hks'). if I get new springs (will probably go with SI dual valve springs and Ti retainers) are new valves/valve guides necessary?
I am pretty much spending my savings on this rebuild so i cant go too big, just over $2k isnt going to get me too much.


Dom

If your gonna go and get some serious springs and retainers like that then why just get a mild cam upgrade that can work fine on stock springs and retainers. Either stick with stock or a mild upgrade with those cams or get some serious cams that the SI dual springs were meant to handle.

 

[spidy3]

these cams will be fine with stock head internals? and remember I have stock rev limiter so I wont be running them past that unless i have a miss shift which shouldnt happen too much since when i race I have the NLTS option on my stage3 chip.

http://www.slowboyracing.com/more.php?id=164&

And the fact that I dont go much bigger with cams is that my car is still a daily driver and i dont see it not being my DD anytime soon.
Also I can barely afford just cams right now and if I was told that I needed all that stuff I ###### wouldnt do any of it, not even cams.

Thanks alot for all input too guys

Dom

 

[Mackzero]

FP1s if you need to be in that price range, unless you can find a set of HKS 264s for a good deal. There is a member in the classifieds selling a set for $400 shipped I believe.

Mild cams will be fine on your stock valve train, as stated above numerous times. I recommend HKS or FP cams. I just sold my Crowers and Unorthodox cam gears, and installed HKS 264/272s with the stock gears.

There is no point getting gears, unless you are going to remove the head and have the cams degreed properly. I would go straight up HKS 264s or FP1s if I were you.

If you do a little searching for the cam comparison, you will see that the 264s have a very nice torque curve compared to the other cams.