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Unread 12-30-2007, 03:31 PM   #1
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Default Hi.

I'm new here from overclock.net, as well, figured I'd come here and learn as much as possible.

Instead of overclocking, I'd want to learn about Camshafts, or whichever part has the most potential for raw, seething power.
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Unread 12-30-2007, 06:02 PM   #2
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......raw, seething power......

Engines I guess lol.
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Unread 12-30-2007, 06:19 PM   #3
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Whats up. No one part really has the most potential. It all plays together. In smaller engines (say 4 cylinders) a bigger camshaft wont add that much (roughly 20hp, depending on application, not extremely high compression and no forced induction), but a big cam in a decent V8 might add 50hp or more, depending on the application. For example, on my engine, a big cam and good heads could add ~150whp (wheel hp) putting you at ~500whp. Not the case for all engines. Bigger engines can make more power naturally aspirated (no turbo, supercharger, or nitrous). Smaller engines need power adders such as those to make big power, and typically would require building the internals of the engine (stronger parts) to handle the power.

Hope that helps some.
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Unread 12-30-2007, 09:51 PM   #4
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Forced induction is what you want to learn about. but please understand that forced induction alone will just blow up your engine. It's always best to prepare your engine for it. Retard cam timing replace the internals with stronger lower compression parts is always good. also beefing up the bottom end is going to help as well. but I don't think I could write a FAQ on it. I can tell you is that if everything is strong what you need to do is monitor the Air fuel ratio and keep it close to 12:1 or 12.5:1 12 being air fuel being air:fuel. Either way you will want something to monitor detonation as well. if your engine detonates under boost it will burn a hole in your pistons. What you want is combustion what you don't want is detonation. I don't know how to describe this well other than like this. pour gun powder in a line and light it it will follow the line and burn out not a big deal. That is combustion. Wrap up the gun powder and compress it and light it and boom. That is detonation. you don't want that. Combustion pushes the piston down. detonation hits it too hard and breaks pistons, rods, crankshafts, your head, and a lot of other expensive parts.

Personally you should take things slow and learn about engines before you start messing with things like adjusting the lift and duration of your cams. Especially on a street car that needs to pass emissions. Adjusting the cams for high end power usually requires that you adjust your idle rpm. Adjusting your idle RPM alone will make you fail emissions in Phoenix or California.
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Unread 12-30-2007, 09:56 PM   #5
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Also the valve heads and lifters are the best way to go when doing a camshaft. What kind of car do you have and what are the long term plans for the car also what engine and what's done so far?
example do you want to make raw power, torque, high rpm's, peak power, or low end power all these play a major part in your build. We need to figure out what the best results for you are then build from there just like CPU. Do you want to be a gamer, do graphics work, video editing, or just surf the web get it.


PS welcome to the site hope to see alot more of you.

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Unread 12-31-2007, 10:11 PM   #6
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I'd like to get about 30-40 more hp out of my Tercel, if it is at all possible, and that would be more pulling power than anything, since the car can hardly pull itself up a hill. (It's a 4 cylinder...made for pure economy, I'd like to keep the 25-35 mpg, but have a Little power under the hood.) Nothing has been done to it yet. I've been thinking about getting a new carb for it, if it would go in smoothly, how much power would that add?

The Corvair is already souped up, I just need to get that back in road condition.

I wouldn't need to worry about emissions, either, I'm not in California or Phoenix.

Can't find any parts for it anywhere, though, in the performance dept.
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Unread 12-31-2007, 11:51 PM   #7
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The 90 tercel is fuel injected the best thing to do would be first pull the motor and clean everything reseal it have the head decked make sure to do a full tuneup with ngk or denso plugs and make sure the intake and trottle body are extremly clean. The vehicle wasn't build for speed but it wasn't as slow as you describe it just needs to be refreshed. After the refresh then custom build some headers you can buy a universal kit and lay it out then have a shop weld it (only suggesting b/c you said can't find performance parts) loose the cat since the vehicle has no down stream O2 sensor anyway and straight pipe to a small upgraded muffler. All together this is pretty cheap if the work is done yourself and the benefit if done right can be major. You will need a nice intake though prefably k&n you can probably adapt 1 over from another car I don't recommend build your own if not done right this can kill the car.

I need you to find if the car is MFI or TBI. b/c we might want to adapt a intake trottle body from a 96 corolla 1.6L they were great runners and would make a major difference with that intake and some slightly bigger injectors. If we can do it with out a new computer.

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Unread 01-01-2008, 12:03 AM   #8
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http://www.carforum.net/gallery/showphoto.php/photo/209

That's the intake if you have a MFI set up we should be able to adapt these runners for alot more air flow with a nice k&n set up.

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Unread 01-01-2008, 03:29 AM   #9
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My friend owns a Tercel of the same generation of yours. He has added a catback exhaust and cold air intake to it. They together made a pretty big difference and helped the car be a lot more bearable up hills.
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Unread 01-01-2008, 11:43 PM   #10
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You can gain a lot of speed by lightening things as well. 30-40 ponies is going to be hard to come by with your normal bolt ons. A single 50 shot of nitrous would get you their quickest but I personally wouldn't do it. With the normal bolt ons like intake exhaust and headers you will only see about 10-15 at the top end. Get a high flow cat that will be maybe 5 more. The thing is that top end horsepower isn't the best way to judge a performance product. It may make 20 more horse power in a few places on the power band and that can get you through first gear quicker. Is it a stick? Make sure you perform a good tune up after or before you add any new parts.
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