Best Cam for 1970 C3
Discussion
Hi fellow vette heads out there was looking for abit of advice regarding cams and who has what on there vette. i have a 1970 350c.i allready has a few mods on ,headers , manifold , carb but i realy want to put a cam in her for abit more pull but i dont want anything to lumpy or aggresive i still want it to idle smooth ish but dont want a cam that you can hardly notice the difference. i will eventualy get a set of heads aswell but going to concentrate on the cams first .
As there is such a wide selection of them on the market i thought i would get a feel of what people are running and what the best seems to be .
Cheers D .
As there is such a wide selection of them on the market i thought i would get a feel of what people are running and what the best seems to be .
Cheers D .
If you are serious about doing it all correctly and matching all components to get the best out of them you'll really need to tell us a bit more - like is the car auto or manual - the rear end ratio - you would be far better choosing heads and then subsequently selecting cam, inlet, carb and exhaust and for that matter if an auto probably the torque converter. Some people will go along with components all from one manufacturer like Edelbrock (heads, cam, inlet & carb) to make it easy - however with careful selection far greater HP/Torque gains can be achieved just as easily with mixed components from several makers.
roscobbc said:
If you are serious about doing it all correctly and matching all components to get the best out of them you'll really need to tell us a bit more - like is the car auto or manual - the rear end ratio - you would be far better choosing heads and then subsequently selecting cam, inlet, carb and exhaust and for that matter if an auto probably the torque converter. Some people will go along with components all from one manufacturer like Edelbrock (heads, cam, inlet & carb) to make it easy - however with careful selection far greater HP/Torque gains can be achieved just as easily with mixed components from several makers.
I agree, doing cam before heads is putting the cart before the horse in many respects.G
Hi Guys ,
Sorry abit more information for you , she is manual 4 speed , i cant remember the final drive ration but will have a look and im not fussed about matching components it has hooker headers , edelbrock carb and manifold , as for doing heads first it makes no odds to me i would like to do the cam and then see the performance change and then do heads at a later date and when i can find a pair of heads as i have had no luck as of yet.
seen a few cams on youtube like the vodoo and comp cams but not sure bout ratios and lift and other cam technical information i mean i know what they mean but what will be the best one for my car .
Cheers D
Sorry abit more information for you , she is manual 4 speed , i cant remember the final drive ration but will have a look and im not fussed about matching components it has hooker headers , edelbrock carb and manifold , as for doing heads first it makes no odds to me i would like to do the cam and then see the performance change and then do heads at a later date and when i can find a pair of heads as i have had no luck as of yet.
seen a few cams on youtube like the vodoo and comp cams but not sure bout ratios and lift and other cam technical information i mean i know what they mean but what will be the best one for my car .
Cheers D
If you change the heads first then you broaden the number and spec of cams you can use. The cam should match the spec i.e. valve size compression ratio etc. of the heads. If you go for a more aggressive cam with standard heads the benefits will be limited and as Ross alluded to you may lose power at certain points in the rev band. It would also be helpful to know the CFM of your carb.
G
G
Best advice...talk to someone in the know...try Jeff Bull Racing he builds loads of chevys and races a chevy. His number can be found on www.eurodragster.com where he runs an advert. You really need to do it in the right order or you will waste a cart load of money.
Hi Guys, ok i understand were your coming from now . i was putting off buying heads first as i was hoping to find a second hand set but havent seen anything come up yet the reason for this is i have just bought a 911 turbo aswell and i dont want to be leaving one to do the other if you get my drift i kind of wanted to do bit by bit but i pretty much makes sense now , and vetteG My car pretty much looks the same as yours except in black and not as many horses yet lol .
Cheers D ,
Cheers D ,
Best to slow down 
How do you know what heads you want? Some will generate 1000bhp, but those are not the ones you want.
Time to do some R&D, you want small ports with high velocity for daily street use and you only want to buy them to pair with your intake... so maybe you need a new intake.
First figure out what your goal is. Draw yourself a torque graph vs rpm. BHP is simply torque x rpm so torque is what sets the output.
Figure out where you want max torque and how long you want it to stay for etc.
Then set a budget.
Given a fixed displacement this will then let you build your solution around the torque curve.
Obviously the goal is to get a close to your ideal torque curve as you can with the budget you have. If you can post up your torque curve (use ms paint or excel etc) and your budget then it will be easier to help identify what heads, intake and cam you need
How do you know what heads you want? Some will generate 1000bhp, but those are not the ones you want.
Time to do some R&D, you want small ports with high velocity for daily street use and you only want to buy them to pair with your intake... so maybe you need a new intake.
First figure out what your goal is. Draw yourself a torque graph vs rpm. BHP is simply torque x rpm so torque is what sets the output.
Figure out where you want max torque and how long you want it to stay for etc.
Then set a budget.
Given a fixed displacement this will then let you build your solution around the torque curve.
Obviously the goal is to get a close to your ideal torque curve as you can with the budget you have. If you can post up your torque curve (use ms paint or excel etc) and your budget then it will be easier to help identify what heads, intake and cam you need
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