how do you like your cam? I am wondeirng because I am an automatic too. Where do you notice the biggest gains? lose any power that you can notice? thanks.

 

Your cam manufacturer should be able to give you lift and duration as basic specs.....(a lot more goes into design of profiles so these numbers give nothing away) if they dont' I wouldn't get near them...

 

well they showed me there equipment, its pretty nice. for $93 they will profile the stock cam and then put it to whatever specs I want. I have heard some say that going higher such as up to 262 or so is too high and may inhibit stalling on an automatic as we do not have the luxory of being able to rev higher to get moving to prevent a stall. I just want some opinions as to if this is true or is there other stuff I should be worried about.

 

260's specs sound good, watch the lift...but I would get as much as I could... lobe centers will play a part in the idle...as long as you try and keep idle smooth...not too much lift or duration or too tight a lobe center you will be fine..if they are going to regrind...keep stock lobe centers, add duration to less then 265 I would think and as much lift as you can get...likely less then 11mm...including rocker ratio if you have rockers... should be fine for an auto.

 

now would something this aggressive require springs? just need to know so I can take these into account for pricing.

 

97+ mirage springs are longer by a couple mm and are stiffer.

 

only thing I really have left to worry about is tuning then, so what exactly will need to be tuned? would it only be under heavy load? I have the ECUflash cable and software already so I could dyno tune my open loops but how about just normal partial throttle driving? will the ECU be able to take it? will I have to do anything special?

 

On the mild grind like this a tune is not ABSOLUTELY necessary. But an emanage or safc would be good to check the fuel.

 

I really need to find out how our ecu works in closed loop so I can plan this out =P

like how much of an adjustment can it make for DD?im thinking maybe a 256/256 grind, not quite 262/262 but should be a bit more doable. ill have to check around some more. I am still not exactly sure how a cam exactly effects fuel needs throughout the RPM range so I will have to find out. Ill post what I find here so that we can all know a bit more. any more input or advice is greatly appreciated.

-Justin

 

Well if you go to rpw's site they don't list fuel management as required for the stage 1 camshaft. i personally would not have a huge cam without a lot of flow work done and a full exhuast. That would be last on my NA mod list. If i just want to get some more fun out of it i would stick to a stock mirage profile.

 

anyone know what the benefits or reasoning behind having a cam with no equal timing? Im seeing a lot of stock cams are 240/248 or even some aftermarket are 256/248. how does this affect the cam? Most cams I have seen while researching are equal 256/256, 248/248, etc.

 

I would NOT go 260/260 on our cars. If mine is a 248/248 like some people say or even a 256/248 I would hate to see much more aggressive of a cam on our cars. With such a small NA motor it can breath on the top end well enough with just a mild cam.

My car is really fun to drive. It is not nearly as powerful as a turbo'ed lancer would be but I need reliability more than anything. Honestly, my powerband starts at about 3500-4000 RPM's. I lost a little low end torque with everything I did and I attribute most of that to the cam. If our cars could rev higher or had more displacement that is when I would go with a bigger cam. I have to hold my auto in gear by manually shifting as high as my car will allow it to rev when drag racing. I tuned it all the way up to 7k RPM's but rev limiter kicks in about 6500-6750. Before my car would die off around 5k or so but now I can take it all the way to rev limiter and it won't die off. Just goes to show you how high the powerband extends.

If I ever get enough money to support buying another car and keeping this one I would love to see what it could do with built internals and either a supercharger or turbocharger with all of my supporting mods.

 

You should ask Mirage2.0 cause I think he had a pretty aggressive cam and was fine.

 

He also had 11:1 pistons and turbo charged it

 

Yeah but before that I think he had just the cam (with supporting mods obviously). I was thinking he could comment more about idle issues than about power gains.