1. Upgraded springs and retainers (whether it's WORKS or Cosworth) are not required, but highly recommended.

2. The WORKS Aperture is an enlarged throttle body.

 

cams on an otherwise bone stock motor are useless. You only need cams once the airflow through the head starts to outpace the stock cams. The gains on a car with intake/full turboback/etc will be more more than on just a stock car, and I dont see why anyone would install cams on a stock car either, when a TBE and tune is cheaper and doesnt involve cracking open the head

Regardless of peak numbers, the delta these cams provide is solid

TBE/intake/etc tuned vs TBE/intake/cams/etc tuned is what was performed, you cant really get any better comparison than that

 

What will the cost be for these cams with and w/o the springs/retainers?

 

RRE is another authorized cosworth dealer, I think their price is 625 a set

 

Any chance of seeing plots without the enlarged throttle body?
I doubt that's a common mod and therefore would be far more aligned with the interest of most here.

 

I doubt it makes a huge difference

 

what i would love to see is a dyno test on a high boost IX w/ bolt ons which usually after 6K cannot hold the power untill the redline. From what i understand the Cossie cams can "correct" this... As far as i am concerned these cams are thumbs up!!! A def upgrade next summer!

 

Well, they included it in their performance pack, so I guess it does make a difference. I'm interested to know how much of the gain comes from the throttlebody+cams combo. There is a possibility that, say cams alone = +25whp and throttle body alone = +2whp but together = 30whp for example.

 

are you really gonna nit pick over 5whp

 

^ it's a yes and a no really... i mean, if the cams alone make ~25whp then that's great. Now if it can do a x whp more with a throttle body then that might be next on the upgrade list or something.

Also I suppose, at the end of the day, you'd pick cams that make 30whp over one that makes 25whp providing that they're at the same price level. The cosworth cams are expensive enough and adding a throttle body will make it even more so. So if for example,
HKS cams = +20whp ~$625
Cosworth = +25whp ~$650
Cosworth & throttle body = +30whp ~$1,000
Them it would give a whole new economy to the comparison imo.

 

Guys, dont forget the Works test car was running 91 octane, not race gas, and it picked up 30whp on low boost.
I am impressed and will be placing my order soon

 

In case you are confused, the difference is with the cams/spring/retainers ALONE.

Cosworth cams (max $649) are NOT more expensive than HKS cams by themselves - if you get spring retainers, then the total package becomes more expensive.

You can try to get HKS, but they do not have any intake cam for IX

 

How much for the cams+valvetrain pieces only? None of the other stuff.

 

^^^Its like 650 for the cams and 399 for the v springs and retainers.

 

I think I have been misunderstood. The hp numbers in my post are totally imaginary, I am requesting for numbers without the throttleboby which as far as I understand it, the tests were with/without cams but on both occasions the larger throttlebody was used. The fact that I used HKS really didn't have any bearing on my point, it was just a brand that I know the rough price of.

I am wondering whether the larger throttlebody actually amplified the effectiveness of the cams. Or, in other words, would the stock throttlebody present a bottleneck when the Cosworth cams are used.

I am highly impressed with the results here and have a lot of time for Works and Cosworth. However, since it's a lot of money -~$1,500 for the whole lot - I'm interested whether or not it's worth getting the throttlebody.

FWIW, I don't own a IX although I am interested in its developments. My main interest here is regarding how Cosworth components perform and whether or not cams benefit to any significant degree from larger throttlebodies even on a stock turbo.