I did research about cam gear settings and it seems like for 272's... I could set my cam gears at -4 intake and -1.5 exhaust and I should get a stock idle but I didn't read anywhere stating if I am going to lose any power or not.


What settings would be good for me if I want more low rpm power which is low end power right?.. sorry about the ignorance.


Someone please reccommend me what to set my HKS 272's at..


Also if anyone recalls me about that rattling noise towards to rear of my car, I was told it was my exhaust touching the driveshaft.. I haven't driven the car much since then but a couple days ago I took it out for a drive.... went about 40 highway miles and right before I got home the rattling sound got really bad.. it's extremely loud now and I don't know what it is.

I'm hoping it isn't the brakes causing this... any thoughts would def. help alot.

 

A -4/-1 setting with those cams makes good high rpm power, but the tradeoff is slightly greater lag and low speed response.

If you want better low speed power, a setting like +1/0 or +2/+1 will do the job. I wouldn't advise it though unless you plan a good dyno tuning session and have the means to manipulate fuel and timing curves.

 

+1/0 +2/+1 settings... will these give me a good stock like idle too? If I use these settings.. I read that silversurfer had a really good experience with -4/-1.5 settings but I'm not really looking for high rpm power.

The reason I'm getting cam gears is to help my idle because it's so crappy right now whenever I pull into a driveway or back out of a parking spot my car idles bad and then eventually stalls out.


When I'm installing the gears I won't be able to put it on a dyno and change any of the fuel curves... Maybe I should just stick with the -4 / -1.5 setting until I can get tuned.

 

Do you have an ECU flash or any sort of tuning device on your car?

If you just want to keep the car from stalling out, you should be able to resolve that through tuning and possibly also raising the idle speed slightly at the throttle body. If you want the idle to be smooth sounding overall, then you will need to adjust the cam gears so that there is more lobe separation -- i.e., so that the intake cam gear is retarded more than the exhaust cam gear (for example, -1/0, 0/+1, etc.). The settings that TedB is suggesting will make your idle worse, though they will improve low RPM power, which is what you originally posted you wanted.

 

As I read my first post a little closer, I didn't mention that I wanted stock idle... I guess there is no way to have more low rpm power and keep a stock idle.

Let me rephrase what I'm looking for...


I'm looking for a cam gear setting which will give me the best idle I could possibly get and give me the most low rpm power.


If there is nothing I can do for that I'll consider just any setting that will give me a perfect or near perfect idle.

This is a daily driven car.

 

Try -2/+1. That setting would give a fair compromise of both worlds. But realize that you probably have more to gain from ECU tuning than anything else.

 

Great... exactly what I was looking for... I'll try it out and see what happens

 

Sounds like you would have been better off with smaller cams. If you don't already have the cam gears, you might want to consider swapping out your 272 intake cam for a 264 intake cam. About the same cost as gears (less after you sell your 272 intake cam, which would go fast on this board) and you can have a better idle without compromising spool-up and low end power.

 

i'm @ 0/0 & i get low 500-600 rpm dips, but NEVER a stall...i think your original thought of -4/-1 was correct, however i don't know weather or not you'd shift the powerband up...try it then drive it & go from there.You can also adj. the idle on your throttle body...my $.02

 

After I bought the 272s and installed them I did wish I got smaller cams

From what I read alot of people had no problems with there 272's so that's what I got... I don't want to go through the hassle of taking them out after just recently putting them in so I bought the gears hoping little by little I can get this car running like stock again ofcourse with the added power.

But..... your right.. I should've went with the 264's..



I did adjust the idle screw.. sometimes the idle creeps up to 1500 rpms and then slowly settles down to 1000. In stop and go traffic its horrible.. I stall out all the time especially when I pull into a driveway or back out of a parking spot.. The car always stalls out... it dips down to 800-600-400-300-100 then dies.

I don't know if that affects anything but half way home after my cam install.. I thew a CEL and later on when I scanned it happened to be a 02 sensor non activity code or something... wierd isn't it?... well I got it erased and I'll see if I get another one.

 

there was a guy on here who set his at -3 -1 and said his idle was better than stock. of course you are VTA so it will continue to idle like crap no matter what you set them at.

 

i know it's a pain in the @ss, but "blip" the throttle when your idle drops...getting tuned or re-tuned will also help...my other $.02

 

I just did 272's and I wish the car loped harder You can bearly even tell that I have cams in there. Im going to get cam gears installed this weekend. Are there any settings that give good power and a more aggressive idle?

 

When you get your cam gears, retard the intake cam 1 degree, retard the exhaust cam 2 degrees and see what you get. If you want more lope still, retard the exhaust cam 3 degrees.

 

So how would -1, -3 compare to -3,-3?

Thanks