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mexirican
07-25-2007, 02:34 AM
was wondering about cams choice i know you get more outta the 280s but i also know the ride is rougher at idle so is it much worse at 280 than 272 for instance or is it pretty much all will have the same type of rough idle? and thinking about the hks cams and wondering if it really matters wat cam gears i choose to run with?
thanks

Teo
-mexirican

jaydm73
07-25-2007, 03:14 AM
i got 264/272 in my car and it idle better than 272/272. not sure about 280's though

steevo8
07-25-2007, 06:57 AM
unless your building a car thats going to be primarly a drag car I wouldnt go with big cams cause there is other stuff out there that will make your car faster and keep the runability issue's next to none. You might not make more peak power with smaller cams but your car will still be faster over all.

For insatance car A has 280 cams and 350whp@4500rpm, and car B has 269 cams and only makes 320whp@4200rpm yet car B can still be faster in the 1/4 cause what you dont see is that car B holds 280ft tq from 2500-4500rpm when car A only holds 280tq from 3200-4200rpm so car B holds more power sooner and longer which accelerates the car sooner and longer. Ya heard me?

So in the end you would be best with a set of WORKS 269 cams.................... Oh and I can sell you some if you would like. :-)

1SloEvo
07-25-2007, 07:48 AM
I would say stick with the HKS cams like you have in mind. The thing about 280s is that you will need to upgrade your valve train as well (springs, retainers, etc.). And the fact that your car might hold tq throughout a longer band is possible with smaller cams, but if you are a drag racer, holding that tq up to 4500 is only going to matter for 1st gear. Normally when you shift at the track, you will NEVER drop back down to that tq band. The hp range you are staying in is in the upper rpms, so the 280s will shine so much better. Even if a 280 cam car doesn't hold as much tq throughout as long a range, I will tell you I would much rather deal with a short tq range for 1 gear, than a shorter hp curve through 3 gears. So in the end, my suggestion would either be a 264/272 setup or a 272/272 setup. :) YGPM

Lurk
07-25-2007, 07:50 AM
280/280 :thumbsup:

TogueMonster
07-25-2007, 07:52 AM
I hear BLOX makes some sweet 272 VIII cams :wink:

http://www.norcalevo.net/index.php?option=com_smf&Itemid=2&topic=19027.0

byt
07-25-2007, 10:28 AM
i'm happy with 264/264. great idle with decent gains throughout the rpm range. 264/272 or 272/264 should idle decently too.

the only aggressive cams with good idle that i've heard were all tuned on standalones.

earlyapex aka jack ass
07-25-2007, 10:43 AM
HKS 272/272 idle well for what they are at 0/0 or at some negative cam gear settings. The stock ecu can be tuned to idle cams decently unless you have the higher lift and duration cams.

The HKS 280/280's idle not so hot, the cosworth M2 cams are super lopey but idle strong.

The 264/264 can be made to idle pretty much like stock. 264/272 is a great compromise for a car that sees mostly street duty. They idle great and smooth. Still a little lope but it's better than straight 272/272.

Cam gears can be a hot topic. Some people swear by no cam gears and installing the cams straight up. Others like the potential cam gears can give. Really depends on what kind of power band you want. You can make the car really torquey around town and still have a strong top end with the right cam gear adjustment.

ChuckP
07-26-2007, 12:17 AM
HKS 272/272 idle well for what they are at 0/0 or at some negative cam gear settings. The stock ecu can be tuned to idle cams decently unless you have the higher lift and duration cams.

The HKS 280/280's idle not so hot, the cosworth M2 cams are super lopey but idle strong.

The 264/264 can be made to idle pretty much like stock. 264/272 is a great compromise for a car that sees mostly street duty. They idle great and smooth. Still a little lope but it's better than straight 272/272.

Cam gears can be a hot topic. Some people swear by no cam gears and installing the cams straight up. Others like the potential cam gears can give. Really depends on what kind of power band you want. You can make the car really torquey around town and still have a strong top end with the right cam gear adjustment.


Damn, I just learned a lot about cams. Thanks.

Don't want to hijack this thread, what cams do you like for the IX? Bryan.

ignatz
07-26-2007, 10:06 AM
I am running HKS 280i/272e. It idles a bit funky, but steady at 900 RPM.

Bill@WORKS
07-26-2007, 01:03 PM
Cam choice depends a lot on your needs from the car (if you want good steady power all the way through the rev range or if you like more of a peaky feel). Our 269 Power cams for example won't gain you maximum HP but they do give solid power through the entire rev range with no losses vs. stock cams at any point in the power band, and a super smooth idle. The slightly more aggressive Cosworth 272 cams are a little lopier at idle and have a slightly peakier power curve (although still quite broad). A really aggressive cam will often trade some low end power to gain some at the top, which can be great on the track, but less than ideal on the street. Most people who are daily driving their cars are pretty happy with a more mellow cam like a 269 and a suitable tune.

Just my .02

-Bill@WORKS

earlyapex aka jack ass
07-26-2007, 01:48 PM
One thing to note is the cosworth 272/272 9 cams usually do not lose power anywhere in the powerband to the stock cams with a proper tune. Neither do the HKS 272/272 cams for the 8. They usually give you gains everywhere.

Once you go up to the more aggressive cams like 280, etc, is when it can lose some spool to the stock cams. Also, if you start messing around with cam gears you can shift the power band around and trade some bottom end for more top end and vice versa.

Ben
07-26-2007, 02:30 PM
One thing to note is the cosworth 272/272 9 cams usually do not lose power anywhere in the powerband to the stock cams with a proper tune. Neither do the HKS 272/272 cams for the 8. They usually give you gains everywhere.



I heard the same thing from Full Function. It makes me wonder why anyone would get 264's.

earlyapex aka jack ass
07-26-2007, 03:31 PM
I heard the same thing from Full Function. It makes me wonder why anyone would get 264's.


For people that want pretty much almost stock cam idle with some good gains over stock cams.

Ben
07-26-2007, 04:00 PM
^ Can't one dial out the lopiness of the idle with the cam gear settings?

Bill@WORKS
07-26-2007, 04:01 PM
We are lovin the Cosworth 272's as well for what its worth. A great choice for a street car that sees the track occasionally.

-Bill@WORKS

earlyapex aka jack ass
07-26-2007, 04:11 PM
^ Can't one dial out the lopiness of the idle with the cam gear settings?


To a point, you can still tell you have cams with the 'bigger' ones.

Ben
07-26-2007, 04:29 PM
^ In that case I'd tell people I need a tuneup or I'm running off 3 cylinders if they ask.

esco
07-31-2007, 11:27 PM
now, havin said 264i with 272e was a great combo, (which im gonna do) how about using Jun's for that or is the lobe too much? Just stick with HKS? GSC? Cosworth? i have seen great things from JUN personally.